Answer:
Workdone = 588 Nm
Explanation:
Given the following data;
Mass = 10 kg
Distance = 6 meters
To find the work done by the man on the box;
First of all, we would determine the force acting on the box;
Force = mass * acceleration due to gravity
Force = 10 * 9.8
Force = 98 N
Next, we find the workdone;
Workdone = force * distance
Workdone = 98 * 6
Workdone = 588 Nm
Can someone please help me with this? Thank you so much!
The 2nd note will have a higher frequency or pitch.
Explanation:
The frequency of a standing wave in a string is given by
[tex]f = \frac{ \sqrt{ \frac{t}{ (\frac{m}{l} )} } }{2l} [/tex]
where t = tension of the string
m/l = mass density of the string
l = length of the string
By placing your finger on the string, you increase the tension and at the same time, shorten the length of the string, thereby increasing the frequency of the sound due to the standing wave produced on the string.
An electric motor and an electric generator are devices that only require magnetism. devices that only require magnetism. entirely different devices. entirely different devices. devices they do not use electromagnetic induction. devices they do not use electromagnetic induction. very similar devices.
Answer:
The both the devices that only require magnetism. entirely different devices.
Explanation:
An electric motor is a device which converts the electrical energy into the mechanical energy. It contains a magnet and the coil is rotated inside this magnetic field due to the application of current.
An electric generator is a device which converts the mechanical energy into the electrical energy.
It contains magnet and the coil which rotates and thus generates the electric current. It is based on the phenomenon of electro magnetic induction.
So, they entirely different devices and both require magnetism.
URGENT A person was standing on top of an office building and ‘accidentally' dropped a rock off the roof . How tall is the building if the total velocity is 123m/s and the horizontal velocity is 22m/s?
Answer:
Building is 747.19 m tall
Explanation:
Given, t
Total velocity v = 123 m/s
Horizontal velocity or the X -component if velocity vx = 22 m/s
For a horizontal projectile motion
V = Sqrt (vx^2 + g^2t^2)
Or t = sqrt{(v^2 – vx^2)/g^2} ---Eq (1)
Time of flight
t = sqrt (2h/g) – Eq (2)
where h is the height
Equating, both the equation, we get –
h = (123^2 – 22^2)/19.6 = 747.19 m
4.) What determines a star brightness? *
a. Size
b. Temperature
c. Size & Temperature
d. Color & Temperature
Factors That Affect Climate Project:
Modeling Earth’s Tilt
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( just write a paragraph or 2 about how the climate affects the earth and its tilt )
Answer:
Modeling Earth’s Tilt
When watching the stars at night, they do appear to move very slowly. This is because the Earth is constantly moving. The Earth completes one “rotation” every twenty-four hours. A rotation is when the planet spins around once. The Earth rotates counterclockwise; this is why the Sun “rises” in the East and “sets” in the West. It is not the Sun’s movement that causes days, but rather the Earth turning around in front of the Sun. The Earth’s axis (the point at which it rotates around, for example, if you were to spin around while standing in one spot, your axis would be an imaginary line running through your head straight down to your feet) is in line with a star named “Polaris”. Polaris is also known as the “North Star” since it is directly above the Earth’s axis. Since this star is directly above the Earth’s axis, it does not appear to move, however, the rest of the stars in the sky move around Polaris (for example: when you spin around, the object directly above your head does not appear to move but everything else seems to spin around that object). Polaris is only seen in the Northern hemisphere and it belongs to the Little Dipper constellation (it’s the last star at the end of the “handle”). Another type of motion is known as “revolution”. Revolution is when one object completes a circular path around another object. The Earth takes 365.24 days to revolve around the Sun. This is why a year is 365 days long. During the year the Earth is angled differently towards the Sun. These changing angles provide us with different Sun intensities and therefore we get four different seasons. Since the Earth is at different positions in space over the year, we see different constellations throughout the year
Explanation:
:)
Factors That Affect Climate Project: Modeling Earth’s Tilt is explained below.
What is rotation?The rotation is the spinning around of an object about its own axis passing through the center.
When the Earth rotates about its own axis, the rotation completes in 24 hours. This causes the day to night and night to day. When the part of Earth is in front of Sun, there is day. But, when the same part of Earth goes away from the Sun, the sunset occurs and then eventually night occurs.
While watching the stars around evening time, they really do seem to move gradually. This is on the grounds that the Earth is continually moving. The Earth finishes one day in each 24 hours. A turn is the point at which the planet twirls around once. The Earth pivots counterclockwise. Not the Sun's development causes days, yet rather the Earth pivoting before the Sun.
The Earth's pivot is in accordance with a star named Polaris. Polaris is otherwise called the North Star since it is straight over the Earth's pivot. Since this star is straight over the Earth's pivot, it doesn't seem to move, nonetheless, the other stars overhead move around Polaris . Polaris is just found in the Northern half of the globe and it has a place with the Little Dipper heavenly body. One more sort of movement is known as "upheaval".
Upheaval is the point at which one item finishes a roundabout way around another item. The Earth requires 365.24 days to rotate around the Sun. To this end, a year is 365 days in length. During the year the Earth is calculated contrastingly towards the Sun. These changing points furnish us with various Sun forces and thusly we get four unique seasons. Since the Earth is at various situations in space over the course of the year, we see various groups of stars consistently.
Thus, the paragraph about how the climate affects the Earth and its tilt is explained above.
Learn more about rotation.
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8. What kind of information do black hole detectors not provide?
A. precise timing
B. specific positional information
C. photon intensity
D. power of a black hole
An attractive force of |1N| exists between two charged particles. The magnitude of both charges is the same. If the particles are 0.25m apart what is the value and sign of the charge for both particles.
A. (- 2.6x10-6 C) and (+ 2.6x10-6 C)
B. (+ 2.7x10-11 C) and (- 2.7x10-11 C)
C. (- 5.27x10-6 C) and (+ 5.27x10-6 C)
D. (- 6.94x10-12 C) and (- 6.94x10-12 C)
Answer:
A: -2.6 × 10^(-6) C and 2.6 × 10^(-6) C
Explanation:
According to coulombs law, the formula for the force between 2 charged particles is;
F = kq1•q2/r²
Where;
F is Force = |1N|
q1 and q2 are the charges of both particles
k is coulombs constant = 9 × 10^(9) N.m²/C²
r is distance between particles = 0.25
Now, the force |1N| means -1 or +1
Thus;
-1 = 9 × 10^(9) × q1•q2/(0.25)²
Or
1 = 9 × 10^(9) × q1•q2/(0.25)²
Thus;
q1•q2 = -6.94 × 10^(-12)
Or q1•q2 = 6.94 × 10^(-12)
Now, we are told that the magnitude of both charges are the same.
Thus;
q² = 6.94 × 10^(-12)
q = √(6.94 × 10^(-12))
q = 2.6 × 10^(-6) C
Since from earlier, we saw that;
q1•q2 = -6.94 × 10^(-12)
Or q1•q2 = 6.94 × 10^(-12)
Thus means that one of the charges will be negative while the other will be positive.
Thus, the charges are;
-2.6 × 10^(-6) C and 2.6 × 10^(-6) C
What services do plants provide? Select the three that apply.
A. Plants release carbon dioxide into the atmosphere.
B. Plants are a source of medicine.
C. Plants are a source of beauty products.
D. Plants prevent soil erosion.
The answer to this is B, C, and D. hope this helped
Un cuerpo se desplaza desde el punto 5,7 m al 7,5 en linea recta. cual es el valor del desplazamiento de la coordenada x?
Answer:
Δx = 2m
Explanation:
From the given information:
De la información dada:
El desplazamiento ocurrió en un vector que se mueve desde una posición inicial particular hasta el final.
Entonces, supongamos que el desplazamiento es D;
Luego:
D = (7,5 ) - (5,7)
D = (2, -2)
Por lo tanto, el valor del desplazamiento de la coordenada x; Δx = 2m
“What is the stance we take when we first get possession of the Basketball?”
Answer:
Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's
In basketball, the stance you take when you first get possession of the ball will depend on the specific situation and what you plan to do with the ball next. Here are a few common stances:
1. Triple Threat Stance: This is a fundamental stance where you hold the ball with both hands at your chest, with your feet shoulder-width apart and knees slightly bent. From this position, you can either dribble, pass or shoot.2. Athletic Stance: This stance is similar to the triple threat stance, but your feet are slightly wider apart, and your knees are bent more deeply. It is a more defensive position, allowing you to quickly move in any direction.3. Pivot Stance: If you catch the ball while standing still, you can use a pivot stance to survey the court and look for passing options. In this stance, you keep one foot planted and pivot on it, while using the other foot to step in different directions.Overall, the stance you take will depend on the specific situation, your position on the court, and your next move with the ball. It's important to practice different stances and be able to quickly adjust based on the situation.
Tim pushes a box with a constant force 250 N at an angle of 45° to the horizontal. If he pushes the box 22 meters, how much work has he done? Keep 4 significant figures.
Answer: 3889 J
Explanation:
Given
Force applied [tex]F=250\ N[/tex]
the direction of application is [tex]\theta=45^{\circ}[/tex] above the horizontal
If he pushes the box 22 m
Work done is given by the dot product of force and displacement
[tex]\Rightarrow W=F\cdot s\\\Rightarrow W=250\times 22\times \cos 45^{\circ}\\\Rightarrow W=3889\ J\quad [\text{upto four significant figure}][/tex]
Hence, option (d) is correct.
How to keep my family safe after a hurricane?
Answer:
Stay Safe After a Hurricane or Other Tropical Storm1. Stay out of floodwater.
2. Never use a wet electrical device.
3. If the power is out, use flashlights instead of candles.
4. Prevent carbon monoxide poisoning.
5. Be careful near damaged buildings.
6. Stay away from power lines.
7. Protect yourself from animals and pests.
8. Drink safe water. Eat safe food.
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Answer:
Acceleration is defined as the rate of change of velocity
Explanation:
Its A
A basketball referee tosses the ball straight up for the starting tip-off. At what velocity must a basketball player leave the ground to rise 1.15 m above the floor in an attempt to get the ball
Answer:
the basketball player must leave the ground with a velocity of 4.748 m/s
Explanation:
Given that data in the question;
From the third equation of motion;
v² - u² = 2as
such that;
u² = v² - 2as
where u is the initial velocity, v is the final velocity, s is the displacement and a is acceleration
so initial velocity of the basket ball player will be;
u = √( v² - 2as )
so from the question; s is 1.15 m and a = - 9.8 m/s² { player is under negative acceleration to get to the ball } and final velocity of the player will be 0.
so we substitute
u = √( (0)² - (2 × -9.8 × 1.15 )
u = √ -( - 22.54 )
u = √ ( 22.54 )
u = 4.748 m/s
Therefore, the basketball player must leave the ground with a velocity of 4.748 m/s
How much does it cost to operate a 90 W light bulb for one day if the cost per kilowatt-hour is $0.08
Answer:
$ 0.17
Explanation:
From the question given above, the following data were obtained:
Power (P) = 90 Watts
Time (t) = 1 day
Cost per KWh = $ 0.08
Cost of operation =?
Next, we shall convert 90 W to KW. This can be obtained as follow:
1000 W = 1 KW
Therefore,
90 W = 90 W × 1 KW / 1000 W
90 W = 0.09 KW
Next, we shall express 1 day in hour. This is shown below:
1 day = 24 hours
Next, we shall determine the energy consumption. This can be obtained as follow:
Power (P) = 0.09 KW
Time (t) = 24 h
Energy (E) =?
E = Pt
E = 0.09 × 24
E = 2.16 KWh
Finally, we shall determine the cost of operation. This can be obtained as follow:
Energy (E) = 2.16 KWh
Cost per KWh = $ 0.08
Cost of operation =?
Cost of operation = Energy × Cost per KWh
Cost of operation = 2.16 × 0.08
Cost of operation = $ 0.17
Thus, the cost of operating the light bulb for one day is $ 0.17
Which of the following are states of matter?
A. Liquid
B. Solid
C. Mixture
D. Gas
E. Compound
Answer:
There are four natural states of matter: Solids , liquids, gases and plasma. The fifth state is the man-made Bose-Einstein condensates. In a solid, particles are packed tightly together, so they don't move much.
Explanation:
A chemical plant produces ammonia using the following reaction. What
trade-off is made by running the reaction at a high temperature?
3H2 + N2 + 2NH3 + energy
O A. The higher temperature decreases the forward reaction rate, and
the pressure of the system is also lowered.
O B. The higher temperature increases the reaction rate, but it also
favors the reverse read on.
C. The higher temperature increases the forward reaction rate, and
the higher pressure increases the reaction rate.
D. The higher temperature decreases the reaction rate, but it also
favors the forward reaction.
Answer: B
Explanation: The higher temperature increases the reaction rate but also favors the reverse read on.
The higher temperature increases the reaction rate, but it also favors the reverse read on. So, option B.
What is meant by rate of a reaction ?The pace at which the products are created from the reactants in a chemical reaction is referred to as the rate of reaction.
Here,
Generally, reactions progress more quickly as the temperature rises.
The average kinetic energy of the reactant molecules will rise with a rise in temperature. The number of molecules having threshold energy rises, increasing the quantity of efficient collisions that actually occur.
Therefore, as the temperature of the reaction is increased, the rate of the reaction increases. But also favors the reverse reaction.
Hence,
The higher temperature increases the reaction rate, but it also favors the reverse read on.
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what is the correct name for a bond between two phosphorus adtoms and three oxygen atoms
Covalent
Explanation:
Covalent Bond
Answer:
diphosphorus trioxide
Explanation:
An object is moving at 4.66 m/s when it accelerates at 5.66 m/s2 for a period of 2.35 s. The distance it moves in this time is ____ m.
Answer:
S = 26.58 meters
Explanation:
Given the following data;
Initial velocity = 4.66 m/s
Acceleration = 5.66 m/s²
Time = 2.35 seconds
To find the distance travelled by the object, we would use the second equation of motion;
S = ut + ½at²
Where;
S represents the displacement or height measured in meters.
u represents the initial velocity measured in meters per seconds.
t represents the time measured in seconds.
a represents acceleration measured in meters per seconds square.
Substituting into the equation, we have;
S = 4.66*2.35 + ½*5.66*2.35²
S = 10.951 + (2.83 * 5.5225)
S = 10.951 + 15.629
S = 26.58 meters
sound does not propagate through a vacuum why
Explanation:
Because, there is not atmosphere in vacuum. So, sound does not propagate through a vacuum.
Select the correct answer.
If you increase the frequency of a sound wave four times, what will happen to its speed?
OA
The speed will increase four times.
OB.
The speed will decrease four times.
The speed will remain the same.
OD.
The speed will increase twice.
O E.
The speed will decrease twice.
A machine lifts a 35 kg object doing 6860 J worth of work. How much power is produced by the machine if it lifts the object in 4 seconds?
350 W
60025 W
27440 W
1715 W
Answer:
Explanation:
We need the power equation for this which is
P = Work/time
We have everything we need to solve this (the mass of the object is extra information):
P = 6860/4
P = 1715W
I need help with my physics homework agh! Please help it's due tomorrow.
Rubbing both pieces cause each piece to have a negative charge.
When two parts have the same they repel each other, so holding one piece up tot he end of the other piece would push it away.
Because one piece is held in the middle by a string, it would rotate the piece in a circle.
If they held the piece to the other end of the one held by a string it would start to rotate in the opposite direction.
What is the relationship between gravity and respiration
Explanation:
causes uneven ventilation in the lungs through the deformation of the lung tissue the so called slinky fact and uneven
I. Complete with one of these phrasal verbs: hand back, take off, h
1. The plane
late because of the bad weather,
...... take off.....(complete)
What should you do if your brakes fail? Hook your shoe under the pedal and see if you can free it. Pull the steering wheel back. Turn on your cruise control. Try pumping the brake pedal to increase pressure.
Answer: Try pumping the brake pedal to increase pressure.
Explanation:
When the brake of a vehicle fails when driving, it's important to pump the brake pedal to increase pressure.
Sometimes, there may be a soft brake due to the fact that the brake master cylinder of the vehicle cannot full pressure which is necessary for the braking power.
One should quickly pump the brake pedal with his or her foot so as to generate enough pressure which will be necessary in stopping safely.
EASY BRAINLIEST PLEASE HELP!!
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(if you put links or don't answer accordingly im reporting your account)
Answer:
solution given:
frequency[f]=215.0Hz
velocity[V]=x
wave length=2.4m
we have
wave length=[tex] \frac{V}{f} [/tex]
2.4m=[tex] \frac{x}{215} [/tex]
2.4×215=[tex] \frac{x}{} [/tex]
x=516 m/s
velocity=speed =516m/s
Answer:
516 m/s
Explanation:
Velocity = Frequency * Wavelength
If wavelength = 2.4m, and Frequency = 215 hz
Then Velocity = 2.4 * 215 which is equal to 516
Hence, velocity = 516 m/s
ohms Long describes the relationship between electronic current voltage and ___
Answer:
voltage ,current and resistance
I need help please and thanks
Answer:
2. Given:
m=1000Kg
a=(9.8m/s)^2
F=m×a
=9.8×1000
=9800N
3.Given:
m=50kg
f=500N
F=m×a
500N=50Kg×a
50kg×a=500N
a=500÷50
a=(10m/s)^2
how does a bimetallic strip work in a sinple alarm system
Answer:
The bimetallic strip in a fire alarm is made of two metals with different expansion rates bonded together to form one piece of metal. ... When the strip touches that contact, it completes a circuit that triggers the alarm to sound.