OA. Elements in the same row of the periodic table have the same
number of electrons.
B. The periodic table is organized by atomic number.
OC. There are two different ways to number the groups of the perio
table.
OD. Each box on the table represents one element.
SUBMIT

The mathematical relationship between m₁ and m₂ is that m₁ is twice the value of m₂.

Length of the femur, L = 0.9 m

Mass of the femur, M = 10 kg

Centre of gravity = L/3

m₁ + m₂ = M

T₁ + T₂ = Mg

m₁g + m₂g = Mg

T₁ + T₂ = m₁g + m₂g

T₁(L/3) = T₂(2L/3)

m₁g(L/3) = 2m₂mg(L/3)

Therefore,

m₁ = 2m₂

To learn more about tension, click:

https://brainly.com/question/14177858

#SPJ1

The vertical reaction force R can be calculated as R = -8.1*m N, where the negative sign indicates that it acts in the opposite direction to the initial acceleration (which is upward in this case).

A reaction force is a force that is equal in magnitude but opposite in direction to an action force. It arises from Newton's third law of motion, which states that every action has an equal and opposite reaction. Whenever an object exerts a force on another object, the second object exerts a reaction force on the first object in the opposite direction.

The vertical reaction of the spacecraft on the astronaut is equal in magnitude but opposite in direction to the force that the astronaut exerts on the spacecraft, according to Newton's third law of motion.

The initial vertical acceleration of the spacecraft is 5g, so the force that the spacecraft exerts on the astronaut is F = ma = m(5g), where m is the mass of the astronaut.

Using the acceleration due to gravity on the moon, g = 1.62 m/s^2, we can calculate the force as:

F = m*(5g) = m*(51.62) = 8.1m N

Therefore, the vertical reaction of the spacecraft on the astronaut is equal in magnitude but opposite in direction, so it is:

R = -8.1*m N

Note that the negative sign indicates that the reaction force is in the opposite direction to the initial acceleration, which is upward in this case.

Hence, R = -8.1*m N is the reaction force.

To learn more about Newton's law of motion click:

brainly.com/question/29775827

#SPJ1

The time taken by the water to freeze and the temperature falls below 0°C is approximately 2940 s.

When the liquid(water) is changed to solid (ice), this process is called melting. The freezing point is a point at which the liquid changes into a liquid. The freezing point of water is 0°C.

From the given,

time taken by the water to freeze below 0°C in the graph (ie: -10°C and -20°C ) = 49 minutes.

1 minute = 60 seconds

49 min = 49×60 seconds = 2940 seconds.

The time taken (t₂) by the water to freeze below 0°C  is 2940 seconds.

To learn more about the Melting:

https://brainly.com/question/14277318

#SPJ1

Answer:

0.04 Hz

Explanation:

The formula for calculating frequency is f = 1/T, and T = the period of the wave. If the wave period is 25 seconds then the formula would be f = 1/25. 1/25 =0.04

High tides occur when the sun and moon are at right angles to one another. This is because the gravitational pull of the moon and the sun combine to create larger-than-normal tides, known as spring tides. The correct option is A.

Gravitational pull is the force of attraction that exists between two objects with mass. The greater the mass of an object, the greater its gravitational pull.

Option B, "Low tides occur when the sun and moon are at right angles to one another," is incorrect. Low tides occur when the sun and moon are at a 90-degree angle (or "quarter moon") to each other, but this position also results in high tides on the opposite side of the Earth.

Option C, "The gravitational pull of the sun and moon combined creates larger than normal tides," is partially correct. The gravitational pull of both the sun and moon does contribute to the tides, but the specific position depicted in the image (sun and moon at right angles to each other) does not necessarily create larger than normal tides.

Option D, "The gravitational pull of the sun reduces the moon's gravitational pull to create moderate tides," is also incorrect. The sun's gravitational pull does have an effect on the tides, but it does not reduce the moon's gravitational pull. Rather, the combined gravitational pull of the sun and moon creates the tides we observe.

Therefore,The accurate description of the tide represented by the image below is option A: "High tides occur when the sun and moon are at right angles to one another."

To learn more about  Gravitational potential energy click:

brainly.com/question/31096472

#SPJ1

X-ray technology can be used to do Photograph through solid objects. option A

X-ray  technology  includes the utilize of high-energy electromagnetic radiation to make pictures of the interior of objects, counting the human body. X-rays are a sort of electromagnetic radiation with wavelengths shorter than unmistakable light, but longer than gamma beams.

X-ray innovations  includes the use of high-energy electromagnetic radiation to make pictures of the interior of objects, counting the human body. X-rays are a sort of electromagnetic radiation with wavelengths shorter than visible light, but longer than gamma beams.

Lastly, X-ray innovation is utilized in a assortment of other applications, such as air terminal security scanners, which utilize X-rays to form pictures of gear and other objects to distinguish potential dangers.

Learn more about X-ray  technology   from https://brainly.com/question/12384544

#SPJ1

The diameter of the field is 79.62 m and the radius is 39.81 m.

A diameter of a circle is any straight line segment that passes through the center of the circle and whose endpoints lie on the circle.

To calculate the diameter and the radius of the field, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1 and solve for D

The radius of the field  = D/2 = 79.62/2 = 39.81 m.

Learn  more about Diameter here: https://brainly.com/question/23220731

#SPJ1

Answer:

Because the matter in solid objects doesn't move

Explanation:

Logic

The maximum height the container can be lifted before bursting is  970 meters above sea level, and the maximum depth the container can be taken before imploding is 35 meters below the surface of the ocean.

Gauge pressure is the pressure measured relative to the atmospheric pressure at a particular location. It does not take into account the atmospheric pressure and only represents the pressure above or below the atmospheric pressure.

A) To find the maximum height h in meters above the ground that the container can be lifted before bursting, we need to find the new gauge pressure at this higher altitude. We can use the relationship between pressure and altitude:

P = P0 + ρgh

where P is the gauge pressure at the new altitude, ρ is the density of air, g is the acceleration due to gravity (assumed constant), and h is the height above sea level. Solving for h, we get:

h = (P - P0) / (ρg)

We know that the maximum pressure difference the container can withstand is ΔPmax = 2.35 × 105 Pa, so the new gauge pressure at the higher altitude can be found by adding this to the sea level pressure:

P = Pa + ΔPmax = 1.01 × 105 Pa + 2.35 × 105 Pa = 3.36 × 105 Pa

Substituting this into the equation above, along with the given values for ρ and g, we get:

h = (3.36 × 105 Pa - 2.02 × 105 Pa) / (1.20 kg/m3 × 9.81 m/s2) ≈ 970 meters

So, the maximum height the container can be lifted before bursting is approximately 970 meters above sea level.

B) To find the maximum depth dmax in meters below the surface of the ocean that the container can be taken before imploding, we need to find the new gauge pressure at this depth. We can use a similar equation to the one used above, but with the density of seawater instead of the density of air:

P = P0 + ρsgd

where g is the acceleration due to gravity (assumed constant), d is the depth below the surface of the ocean, and ρs is the density of seawater. Solving for d, we get:

d = (P - P0) / (ρsg)

We know that the maximum pressure difference the container can withstand is ΔPmax = 2.35 × 105 Pa, so the new gauge pressure at the maximum depth can be found by subtracting this from the sea level pressure:

P = P0 - ΔPmax = 2.02 × 105 Pa - 2.35 × 105 Pa = -0.33 × 105 Pa

(Note that this gives a negative value for pressure, which means the container will implode rather than burst.)

Substituting this into the equation above, along with the given values for ρs and g, we get:

d = (-0.33 × 105 Pa - 1.01 × 105 Pa) / (1025 kg/m3 × 9.81 m/s2) ≈ -35 meters

So, the maximum depth the container can be taken before imploding is approximately 35 meters below the surface of the ocean.

Therefore, The container can be lifted to a maximum height of 970 meters above sea level without bursting, and it can be submerged to a maximum depth of 35 meters without imploding.

To learn more about The relationship between gauge pressure and true pressure click:

https://brainly.com/question/29341536

#SPJ1

The correct match is A - trough, B - amplitude, C - crest, and D - wavelength.

A - A trough is the lowest point on a wave, where the displacement of the medium or the amplitude of the wave is at its minimum.

B - Amplitude refers to the maximum displacement or distance moved by a point on a vibrating body or wave, from its equilibrium position.

C - A crest is the highest point on a wave, where the displacement of the medium or the amplitude of the wave is at its maximum.

D - Wavelength is the distance between two corresponding points on a wave, such as the distance between two consecutive crests or troughs. It is often measured in meters or other units of length.

Hence, A - trough, B - amplitude, C - crest, and D - wavelength.

To learn more about the relationship between wave energy and amplitude click:

https://brainly.com/question/17003906

#SPJ1

Answer:100

Explanation:

Answer: 317.52

Explanation:

I'm just better

(a) The angular momentum of a 20-kg payload experiencing 10 gs in a centrifuge with a radius of 8.8 m is 5,483 kg m^2/s. (b) If the payload loses 10 kg, the new spin rate taking into account no frictional forces present is 7.54 rad/s.

(a) The angular momentum of a rotating object is given by:

L = Iω

where L is the angular momentum, I is the moment of inertia, and ω is the angular velocity.

The moment of inertia for a point mass rotating in a circle is given by:

I = mr^2

where m is the mass of the object and r is the radius of the circle.

To calculate the angular momentum of the 20-kg payload that experiences 10 gs in the centrifuge, we first need to calculate the angular velocity of the payload. The force on the payload is 10 times the force of gravity on Earth, so the net force on the payload is:

F = ma

F = (10 × 9.8 m/s^2) × 20 kg

F = 1960 N

The net force on the payload is the centripetal force, which is given by:

F = mv^2/r

where v is the velocity of the payload.

Rearranging this equation to solve for v:

v = sqrt(Fr/m)

v = sqrt((1960 N) × (8.8 m) / (20 kg))

v = 33.2 m/s

The angular velocity of the payload is:

ω = v/r

ω = 33.2 m/s / 8.8 m

ω = 3.77 rad/s

Finally, we can calculate the angular momentum of the payload:

L = Iω

L = (mr^2)ω

L = (20 kg) × (8.8 m)^2 × 3.77 rad/s

L = 5,483 kg m^2/s

(b) When the payload loses 10 kg, its new moment of inertia becomes:

I' = m'r^2

I' = (10 kg) × (8.8 m)^2

I' = 774.4 kg m^2

Conservation of angular momentum tells us that:

L = Iω = I'ω'

where ω' is the new angular velocity of the payload.

Solving for ω':

ω' = (I/I')ω

ω' = ((20 kg) × (8.8 m)^2 × 3.77 rad/s) / ((10 kg) × (8.8 m)^2)

ω' = 7.54 rad/s

So, the new spin rate of the payload is 7.54 rad/s.

Therefore,(a) For a 20-kg payload experiencing 10 gs in a centrifuge with an 8.8 m radius, the angular momentum is 5,483 kg m^2/s. (b) If the payload's mass reduces by 10 kg without any frictional forces present, the new spin rate is 7.54 rad/s.

To learn more about momentum and  impulse equations click:

https://brainly.com/question/30101966

#SPJ1

Situation (a) results in a zero net magnetic field at point P. Option 1 is correct.

In situation (a), the two wires are carrying currents in opposite directions. At point P, the magnetic field due to one wire will be in the opposite direction of the magnetic field due to the other wire. Since the two fields are equal in magnitude and opposite in direction, they cancel each other out, resulting in a net magnetic field of zero at point P.

In situations (b), (c), and (d), the currents are either in the same direction or the wires are at different distances from point P. In these situations, the magnetic fields due to the wires do not cancel each other out at point P, resulting in a nonzero net magnetic field. Therefore, only situation (a) gives rise to a zero net magnetic field at point P. Option 1 is correct.

To know more about magnetic field, here

brainly.com/question/14848188

#SPJ1

Answer:

The new length at the new temperature is approximately 35.0812cm.

Explanation:

Let's use the coefficient of linear expansion of lead, which is approximately 0.000029 per degree Celsius.

The change in length can be calculated using the formula:

ΔL = αLΔT

where:

ΔL = change in length

α = coefficient of linear expansion

L = initial length

ΔT = change in temperature

In this case, ΔT = 80°C, L = 35cm and α = 0.000029/°C.

ΔL = (0.000029/°C) x (35cm) x (80°C)

ΔL = 0.0812 cm

Therefore, the change in length is 0.0812 cm.

To find the new length, we add the change in length to the original length:

New length = 35cm + 0.0812cm

New length = 35.0812cm

So

a) To determine if the car will hit the object before coming to a stop, we need to calculate the distance required to stop the car, assuming maximum braking deceleration. We can use the following formula:

d = (v^2) / (2a)

where:

d = distance required to stop

v = initial velocity

a = acceleration/deceleration

In this case, v = 100 km/h = 27.78 m/s (converted from km/h to m/s)

a = -7 m/s^2 (negative sign indicates deceleration)

We know that the car's headlights extend out to a range of 30 m, so if the distance required to stop the car is greater than 30 m, the car will hit the object before coming to a stop.

Plugging in the values to the formula, we get:

d = (27.78^2) / (2 x -7) = 108.61 m

Since 108.61 m is greater than 30 m, the car will hit the object before coming to a stop.

b) To calculate the time required to stop, we can use the following formula:

t = v / a

where:

t = time required to stop

v = initial velocity

a = acceleration/deceleration

Plugging in the values, we get:

t = 27.78 / 7 = 3.97 s

Therefore, it will take 3.97 seconds to stop the car.

Answer: Less than 1% of the stars that Kepler will be looking at are closer than 600 light years. Stars farther than 3,000 light years are too faint for Kepler to observe the transits needed to detect Earth-size planets.

Explanation:

Spinning a magnet near a wire would generate a current.

The circuit must make a complete loop and must have all parts connected to that loop.

When a magnet approaches a conductor, such as a wire, the magnetic field changes, causing the wire to conduct electricity. Electromagnetic induction is a process that underlies the operation of electric motors and generators.

Electromagnetic induction and is the basis for how generators and electric motors work and it explains the fact that current is generated by a spinning a magnet near a wire.

Learn more about spinning magnet:https://brainly.com/question/14421392

#SPJ1

The final volume of the gas is  9.16 × 10⁻³ m³, the work done by the gas is -0.0147 kJ, and the thermal energy transferred is  0.0147 kJ.

We can use the following equations to solve this problem:

Boyle's Law: PV = constant at constant temperature (isothermally)

Work done by a gas: W = -P∆V

Thermal energy transferred: Q = -W (assuming no heat transfer between the gas and its surroundings)

1. Given:

n = 2 mol (number of moles of helium gas)

T = 170 K (initial temperature)

P1 = 0.23 atm (initial pressure)

P2 = 1.78 atm (final pressure)

R = 8.31451 J/K·mol (universal gas constant)

Using Boyle's Law, we can write:

P1V1 = P2V2

V2 = (P1V1) / P2

V1 = (nRT) / P1 (using PV = nRT)

Substituting the given values:

V2 = (0.23 mol/m3 × 2 mol × 8.31451 J/K·mol × 170 K) / 1.78 atm

V2 ≈ 9.16 × 10⁻³ m³

Therefore, the final volume of the gas is approximately 9.16 × 10⁻³ m³.

2. The work done by the gas can be calculated using the equation:

W = -P∆V

Substituting the given values:

W = -(1.78 atm - 0.23 atm) × (9.16 × 10⁻³ m³)

W ≈ -0.0147 kJ

Therefore, the work done by the gas is approximately -0.0147 kJ.

3. The thermal energy transferred can be calculated using the equation:

Q = -W

Substituting the value of W obtained in part 2:

Q = -(-0.0147 kJ)

Q ≈ 0.0147 kJ

So, the thermal energy transferred is approximately 0.0147 kJ.

Hence, The gas has a final volume of 9.16 × 10⁻³ m³, does work of -0.0147 kJ, and transfers thermal energy of 0.0147 kJ.

To learn more about Workdone click:

https://brainly.com/question/28172139

#SPJ1

The kinetic energy of the bowling ball is 25 J (joules).

Kinetic energy is simply a form of energy a particle or object possesses due to its motion.

It is expressed as;

K = (1/2)mv²

Where m is mass of the object and v is its velocity.

Given that the mass of the bowling ball is 0.005 kg and its velocity is 100 m/s.

We can use the formula to calculate its kinetic energy:

K = (1/2)mv²

KE = (1/2) × 0.005kg × (100m/s)²

KE = (1/2) × 0.005kg × 10000 m²/s²

KE = 25 J

Therefore, the kinetic energy is 25 joules.

Learn more about kinetic energy here: brainly.com/question/27397088

#SPJ1

The volume of the solid immersed in the liquid is  5 x 10⁻⁵ m³.

The volume of the solid is calculated as follows;

V = (Ws - Wa) / (ρg)

where;

Ws = 0.2 kg x 9.8 m/s²

Ws = 1.96 N

Wa = 0.16 kg x 9.8 m/s²

Wa = 1.568 N

ρ = 0.8 x 1000 g/km³ = 800 kg/m³

The volume is calculated as;

V = (1.96 - 1.568 )/(800 x 9.8)

V = 5 x 10⁻⁵ m³

Learn more about volume here: https://brainly.com/question/27710307

#SPJ1

The gravitational force acting on the 83.4-kg person due to the 65.6-kg person is approximately 3.14 x 10^-8 N.  

The gravitational force is an attraction between any two mass-containing objects.

The following formula determines the gravitational force between two objects:

F = G * (m1 * m2) / r2.

where

Plugging in the given values, we have:

F = (6.67 x 10^-11 N * m^2 / kg^2) * (83.4 kg) * (65.6 kg) / (1.21 m)^2

F = 3.14 x 10^-8 N

Therefore, the gravitational force acting on the 83.4-kg person due to the 65.6-kg person is approximately 3.14 x 10^-8 N.

Learn more about gravitational force here : brainly.com/question/29328661

#SPJ1

The gravitational potential energy of the object will be two times greater than the elastic potential energy of the spring after the distances are doubled. The correct option is A.

The gravitational potential energy of an object is given by the formula:

PE = mgh

Where m is the mass of the object, g is the acceleration due to gravity and h is the height of the object above the reference point.

In this case, the height of the object is doubled, so the potential energy will also be doubled. Therefore, when the distance is doubled, the gravitational potential energy of the object will be two times greater than before.

The elastic potential energy of a spring is given by the formula:

PE = 1/2 kx^2

Where k is the spring constant and x is the displacement of the spring from its equilibrium position.

In this case, the displacement of the spring is doubled, so the potential energy will be four times greater than before. Therefore, option B is not correct.

Option C is also not correct because the potential energy of the spring will be four times greater than the gravitational potential energy of the object.

Option D is not correct because the potential energies of the object and the spring are not equal to one another when the distances are doubled.

Therefore, The correct answer is option A.

To learn more about Gravitational force click:

brainly.com/question/29190673

#SPJ1

The good conductors of heat and electricity are Penny, and An aluminum soda can.

option A and B.

Good conductors of electricity are those materials that allow easy passage of electric current through them.

All metals are good conductors of electricity, and some of their examples include;

Aluminum

Copper

Silver

Zinc, etc

Poor conductors on the other hand do not allow easy passage of electric current through them.

Learn more about good conductors here: https://brainly.com/question/1922856

#SPJ1

Answer:

Below

Explanation:
since I’m in biology, here are he exact steps from my textbook:

The Scientific Method:

A scientific method is a series of steps for investigating questions and testing ideas. There are several versions of the scientific method, but all versions are based on rational thinking, inquiry, and experimentation. The scientific method includes five main steps. Review the steps of the overall system before diving into each one.

1. Ask a Question:

The purpose of a scientific investigation is what you are trying to find out or the question you are trying to answer. An empirical observation (e.g., the sky is blue) will prompt an appropriate question (e.g., why is the sky blue?).

2. Do Background Research:

You have learned that science is a body of knowledge. It is important that you research what other scientists have already observed and discovered. Previous investigations into your topic may lead you to new questions that need answers. If the farmer wishes to know why his plants are dying, he would research reasons why that type of plant might not grow. The farmer might conduct this research at the library or a local garden center or on the Internet.

3. Form a Hypothesis:

A hypothesis is an explanation for a specific observation, phenomenon, or scientific problem that is based on scientific knowledge and can be tested by further investigation. After researching what other scientists already know, the farmer will need to form a hypothesis about what he thinks will happen. Forming a hypothesis involves an understanding of current scientific knowledge and creativity to look at the problem or question in a way that will lead to the predicted outcome. For instance, the farmer notices that the dying plants seem to be yellow and brown, so he could conclude that there are not enough nutrients in the soil. He would form the hypothesis, ”The lack of nutrients in the soil is causing the plants to die.”

4. Test with an Experiment:

An experiment allows you to test your hypothesis to determine if it is a correct or incorrect prediction of the outcome. There are many ways to test a hypothesis, but every experiment should have at least one variable that changes while the others stay the same or are controlled. This allows the experimenter to determine if a selected change will affect a specific factor in the way their hypothesis predicts. The farmer would then design and carry out a test to try to get an answer to the original question and observation. The farmer would record the data on a data sheet. He would also want to write down the steps he used to carry out his experiment in case it needs to be repeated. This is called the procedure. The farmer would make sure his procedure and data are accurately reported, so that he could share the information with others or repeat the procedure at a later time.

5. Analyze Data:

The analysis of data from an experiment compares known and unknown values in the data. The experiments are always repeated several times to make sure the results are valid. When an experiment is valid, it means that the results are consistent over time and reproducible by you or by another scientist, following the same procedure. Based on the results of the farmer’s experiment, he would analyze the data by creating charts or graphs of the growth of the plants over time.

6. Draw Conclusions:

Based on the analysis of the collected data, a scientist will refer back to the hypothesis and ask: Was the hypothesis correct or incorrect? Sometimes this is very simple and the conclusion is obvious. On occasion, finding that the hypothesis is incorrect will lead to new discoveries. Sometimes, the results are inconclusive, and the scientist must design a new experiment or complete further research. If the farmer finds that the data supports the original hypothesis, he may conclude that the lack of soil nutrients caused the plants to poorly grow (i.e., analysis shows that changing the amount of nutrient causes the plants to grow faster). On the other hand, the data might not support the original hypothesis (i.e., analysis shows that changing the amount of nutrient does not keep the plants from dying). In this case, he would try to change a different variable in the experiment, such as the amount of water, in order to retest his hypothesis.

friction

Friction is what causes moving objects to slow down and eventually stop.

The equivalent resistance between points A and B is 0.837Ω.

Resistors in series are connected end-to-end so that the current flows through them in sequence. The equivalent resistance of resistors in series is the sum of their individual resistances.

The formula for equivalent resistance of resistors in series: R_eq = R_1 + R_2 + ... + R_n

Resistors in parallel are connected across each other so that the voltage is the same across each resistor. The equivalent resistance of resistors in parallel is the reciprocal of the sum of the reciprocals of their individual resistances.

The formula for equivalent resistance of resistors in parallel: 1/R_eq = 1/R_1 + 1/R_2 + ... + 1/R_n

Here in the Fig.

we can simplify the second set of resistors in parallel (4.8 Ω, 3.3 Ω, and 8.1 Ω) using the same formula:

1/Req1 = 1/4.8 + 1/3.3 + 1/8.1

Req1=1.575Ω

This Req1 connected series with 6.3Ω, then Req of this two resistance given by:

Req2= 1.575Ω+ 6.3Ω

Req2=7.875Ω

Once again this req2 makes the parallel with the other two resistance i. e 1.5Ω and 2.5Ω

Their equivalent resistance  is given by,

1/Req3=1/1.5 + 1/2.5 + 1/7.875

Req3=0.837Ω

Hence, The equivalent resistance between points A and B is 0.837Ω

To learn more about Ohm's Law click:

brainly.com/question/1247379

#SPJ1

Answer:Calculate the work done using:

work done (in joules) = force (in newtons) x distance moved (in metres)

To practice calculations involving force, distance and work done.

Explanation: I hope this helps srry if I'm wrong