Answer:
The stone is accelerating at 9.8 m/s². If we multiply that by three seconds, we get 29.4 m/s.
Can someone help me please
Metalloids
Metalloids have properties that are intermediate between metals and non-metals. They have properties that are difficult to characterize.
Physical Properties of Metalloids
State of matter - Solid
Lustre - Metallic lustre
Elasticity - Brittle
Conductivity - Semi-conductive in nature
Chemical Properties of Metalloids
Oxidation - They are capable of forming glasses.
Alloys - When mixed with metals, they form alloys.
Allotropic - Metallic and non-metallic allotropes are formed.
Melting - Few metalloids contract when they are melted.
Compounds - Compounds are formed when they react with halogens.
Common Properties of Metalloids
Metalloids are good semiconductors. The reactivity of metalloids is dependent on the properties of the elements they are reacting with. Electronegativity and ionization energy are between metals and non-metals.Non-Metals
Non-metals are those which lack all the metallic attributes. They are good insulators of heat and electricity. They are mostly gases and sometimes liquid. Some they are even solid at room temperatures like Carbon, sulphur and phosphorus.
Properties of Non metals
Characteristic properties of non-metals are high ionization energies and high electronegativity. Owing to these properties, non-metals usually gain electrons when reacting with other compounds, forming covalent bonds. Among the non-metals, the anionic dopants have a strong influence on the VB. Non-Metal dopants are carbon, nitrogen, fluorine, sulphur and iodine.
General properties of non-metals.
The atoms of non-metals tend to be smaller than those of metals. Several of the other properties of non-metals result from their atomic sizes. Non-metals exhibit very low electrical conductivities. The low or non-existent electrical conductivity is the most important property that distinguishes non-metals from metals. Non-metals have high electronegativities. This means that the atoms of non-metals have a strong tendency to attract more electrons than what they would normally have. Non-metals have high electronegativities. This means that the atoms of non-metals have a strong tendency to hold on to the electrons that already have. In contrast, metals rather easily give up one or more electrons to non-metals, metal therefore easily form positively charged ions, and metals readily conduct electricity. Under normal conditions of temperature and pressure, some non-metals are found as gases, some found as solids and one is found as liquid. In contrast, except mercury, all metals are solids at room temperature. The fact that so many non-metals exist as liquids or gases means that non-metals generally have relatively low melting and boiling points under normal atmospheric conditions. In their solid-state, non-metals tend to be brittle. Therefore, they lack the malleability and ductility exhibited by metals.Physical Properties of Non-Metals
Ductility is the property of the material to be stretched into wires but non-metals are not ductile except for carbon, as carbon fibres find uses in a wide variety of industries including sports and music equipment. Another property characteristic to metals is absent in non-metals called malleability. They can’t be drawn into sheets as they are brittle and break on applying pressure. They are not lustrous as they do not have any shiny appearance. They are not sonorous and do not produce a deep ringing sound when they are hit with another material. They are also bad conductors of heat and electricity except for graphite.What is the smallest particle of an element that still retains of that element
A.compound
B.molecule
C.atom
D.mixture
Answer:
atom
Explanation:
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How long would it take for a car to travel 500m if it was moving at a constant speed of 50.0 km/h?
A simple pendulum makes 540 complete oscillations in a minute, so its frequency is ........... HZ
A-3
B-6
C-9
D-12
Answer:
a
Explanation:
time=540×60
=32400
f=1÷t
=1÷32400
f=3.09
f=3
The frequency is 3 Hz.
To calculate the frequency of the pendulum, the values given are
t = 540 minute
What is frequency of simple pendulum?The frequency of the simple pendulum can be described through the pendulum moves and come back to its own position for the specific period of the time. Also the pendulum frequency depends upon its length and mass.
Thus, frequency formula can be,
ω = √g/l
T = 2π / ω
Frequency, f = 1 / T = ω / 2π
As we have to find the frequency, the time period will be reciprocal.
f = 1/ T Hz.
t = 540 per minute
= 540 × 60 seconds
= 32400 seconds
f = 1 / 32400
= 3.08 × 10 ⁻⁶
f = 3 Hz
The frequency thus calculated as 3Hz.
Hence, Option A is the correct answer.
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an ocean wave has a wavelength of 15 meters and is moving at 2.5 m/s. what is the frequency
Answer:
frequency is .167/s for this wave
Answer:
wave speed=frequency×wave length
frequency=15/2.5
=6
i hope this helps
One of the smallest planes ever flown was the Bumble Bee II, which had a mass of 180 kg. If the pilot’s mass was 70 kg, what was the velocity of both plane and pilot if their momentum was 20,800 kg∙m/s to the west?
Answer:
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What is happening in this image ?
Answer:
A mirror is scattering light.
If my angular velocity slows from 30 Hz to 20 Hz in 72°, what is my deceleration?
Answer:
The deceleration is -7.85x10³ rad/s².
Explanation:
The angular speed (ω) is related to frequency (f) as follows:
[tex] \omega = 2\pi f [/tex]
When the frequency is 30 Hz the angular speed is:
[tex] \omega_{i} = 2\pi f = 2\pi*30 Hz = 188.5 rad/s [/tex]
Now, when the frequency is 20 Hz the angular speed is:
[tex] \omega_{f} = 2\pi*20 Hz = 125.7 rad/s [/tex]
Finally, the angular acceleration (α) can be found using the following equation:
[tex] \omega_{f}^{2} = \omega_{i}^{2} + 2\theta \alpha [/tex]
Where:
θ: is the angular displacement = 72°
[tex] \alpha = \frac{\omega_{f}^{2} - \omega_{i}^{2}}{2\theta} [/tex]
[tex] \alpha = \frac{(125.7 rad/s)^{2} - (188.5 rad/s)^{2}}{2*72*\frac{2\pi rad}{360}} = -7.85 \cdot 10^{3} rad/s^{2} [/tex]
Therefore, the deceleration is -7.85x10³ rad/s².
I hope it helps you!
what would be the velocity of a sound wave in the air with a frequency of 260Hz?
The speed of sound in air doesn't depend on the frequency of the sound. It depends on the temperature, pressure, and humidity of the air. It's usually around 340 m/s .
Please help me please and you will get the brainlist
Answer:
4. Force = 178.6 Newton.
5. Acceleration = 2.28 m/s².
6. Force = 178.6 Newton.
Explanation:
4. Given the following data;
Acceleration = 3.8 m/s²
Mass = 47kg
Force = mass * acceleration
Force = 47 * 3.8
Force = 178.6 Newton.
5. Given the following data;
Force = 785N
Mass = 345kg
Acceleration = force/mass
Acceleration = 785/345
Acceleration = 2.28 m/s²
6. Given the following data;
Acceleration = 6m/s²
Force = 32N
Mass =force/acceleration
Mass = 32/6
Mass = 5.33 kilograms
please try a and c, electric circuits please try
Explanation:
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Plssssss help me no one wants to help me——— power plants use generators to generate electricity for homes and businesses. Some generators work by spinning a coil of wire inside a magnet, as shown in the image. To keep the coil of wire spinning, it’s often attached to a turbine, which is s as n axle with fan blades. Different kinds of power plants use different methods to spin the turbine to make electricity. What’s one way a power plant might spin the turbine?
Answer:
There are a many ways to produce electricity. Electrons can flow between certain different materials providing a current, as in a common battery. While reliable and portable, chemical batteries run down quickly. To provide the large amounts of steady power demanded by modern societies, large power plants have been built. Most power plants make electricity with a machine called a generator.
A 1925 Turbine Rotor
A 1925 turbine rotor for a Westinghouse generator, Image #21.035, Science Service Historical Image Collection, National Museum of American History
Generators have two important parts: the rotor (which rotates) and the stator (which remains stationary). Generators use the principle of electro-magnetic induction, which exploits the relation between magnetism and electricity. In large AC generators, an outer shell with powerful magnets rotates around a stationary "armature" which is wound with heavy wire. As they move, the magnets induce an electric current in the wire.
It is important to recognize that electricity is not mined or harvested, it must be manufactured. And since it's not easily stored in quantity, it must be manufactured at time of demand. Electricity is a form of energy, but not an energy source. Different generating plants harness different energy sources to make electric power. The two most common types are "Thermal Plants" and "Kinetic Plants".
a student is supplied with the following pieces of equipment:
• a small metal ball
• table tennis ball
• metre rule
• stop clock
• calculator
• light gate
• data logger
describe how the student can use this, or other additional equipment, to determine an accurate value for the acceleration of free fall (g). the student need not use all the equipment. show clearly what measurements should be taken and how the students should use these in determining (g). describe one source of error and how this might affect the value of (g).
(6 marks/year9/gcse)
Explanation:
Use a meter stick, small metal ball, stopwatch, calculator.
Have the students mark off a vetrtical distance from which to drop the metal ball. Ready the stopwatch, and start when the object is dropped and stop when the object contact the ground. Repeat 5 times and average the stopwatch times.
Now, use the formula d=vo+(1/2)at^2
There's no initial velocity, so d=(1/2)at^2
We know time and distance, so we can solve for a, acceleration.
2d=at^2
(2d)/(t^2)=a
Now, input the numbers gathered in the experiment in meters and seconds.
One source of error is human error (stopwatch timing)
Air resistance (although pretty negligible)
The force required to maintain an object at a constant speed in free space is equal to __________
resistors - defibrillator - resistance - increases - energy - decreases -capacitors.
1_______________ is the difficulty of passing electric current through a conductor. It 2_______________ as the wire becomes longer and 3_________________ as the wire becomes wider.
4________________ are electric devices used to transform energy into heat or light.
5________________ are similar to batteries. They can store 6_______________. But they charge up quicker and can discharge the all the energy faster than a second. A 7_________________ is an example of a capacitor function.
Answer:
1. Resistance.
2. Decreases.
3. Increases.
4. Defibrillator.
5. Capacitors.
6. Energy.
7. Resistor.
Explanation:
Resistance is the difficulty of passing electric current through a conductor. It increases as the wire becomes longer and decreases as the wire becomes wider.
Defibrillator are electric devices used to transform energy into heat or light.
Capacitors are similar to batteries. They can store energy. But they charge up quicker and can discharge all the the energy faster than a second. A resistor is an example of a capacitor function.
Define a vector in a sentence.
Answer:
A vector in physics is a quantity that has both magnitude and direction.
Answer:
a line that usually veers and can be the result of force. Examples of Vector in a sentence. Military aviators study the vector between their aircraft and the enemy in order to calculate how to intercept.
Explanation:
How to calculate the period of a wave?
Answer:
The wave velocity and the wavelength are related to the wave's frequency and period by vw=λT or vw=fλ. The time for one complete wave cycle is the period T. The number of waves per unit time is the frequency ƒ. The wave frequency and the period are inversely related to one another.
Explanation:
T = 1 / f is the formula to calculate the period of a wave.
What is the period of the wave?The time it takes for two successive crests (one wavelength) to pass a specified point. The wave period is often referenced in seconds.
The calculation of period of wave is:
The formula for period is T = 1 / f ,
where "T" is period – the time it takes for one cycle to complete, and "f" is frequency.
To get period from frequency, first convert frequency from Hertz to 1/s.
Period refers to the time for something to happen and is measured in seconds/cycle.
In this case, there are 11 seconds per 33 vibrational cycles.
Thus the period is (11 s) / (33 cycles) = 0.33 seconds.
Therefore,
T = 1 / f is the formula to calculate the period of a wave.
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caves are formed from?
Answer:
caves are mainly formed by water or in some other cases limestone.
Why does it take a long time for a train to come to a complete stop?
Answer:
Trains stop in their own time.
Every freight train, every situation, every load is different. The distance it takes to halt a train in an emergency is based on multiple factors: the speed when the brakes are applied, the track's incline, the number of cars hooked behind the locomotives and the loading of those cars, the "brake delay" inherent in the train's hydraulic system, the friction-causing metallurgy of the wheels and tracks, the weather.
Even the engineer behind the controls can't know on any given day how long it would take to stop the train.
"There is no specific rule of thumb on that," said Greg Udolph, general manager of the Texas State Railroad, a freight and tourist line in East Texas running from Palestine to Rusk. "If the track is wet with dew it changes. Everything that can affect it does. A train takes as long to stop as it takes to stop. Sometimes it can be a mile. Sometimes it's less, sometime's it's more."
Explanation:
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Who is Isaac Newton?
Take the points, Im leaving Brainly..
Answer: English
. mathematician
. physicist
. astronomer
. theologian
. author
Explanation:
Take the points, Im leaving Brainly.. Why?!
[tex]\huge\bf\maltese{\underline{\red{Thanks}}}\maltese[/tex]
can somebody definee newton1 word to word pls
Answer:
One newton is a unit of force equal to the force needed to move a one kilogram mass by one meter per second per second. Word originsThis word is named for Sir Isaac Newton (1642-1727), the great English mathematician and physicist who discovered gravity.
Explanation:
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2. You push a 12.3-kg shopping cart with a force of 10.1 N.
(a) What is the acceleration of the cart?
(b) If the cart starts from rest, how far does it move in 2.50 s?
Plz answer quick
Answer:
Explanation:
The important part about this problem is the acceleration, which you must find by using
F = ma,
where F is the force applied,
m is the mass,
and a is the acceleration.
F = ma
10.1 N = (12.3 kg)a
a = 0.8211 m/s^2
Now use the kinematics equations.
d = vot + (1/2)at^2
where d is the distance moved,
vo is the initial velocity (0),
a is the acceleration,
and t is the time.
d = vot + (1/2)at^2
d = (0 m/s)(2.5 s) + (1/2)(0.8211 m/s^2)(2.5 s)^2
d = 2.57 m
a. The acceleration of the cart, is 0.821 [tex]m/s^2[/tex].
b. The car moved a distance of 30.63 meters starting from rest.
Given the following data:
Mass of shopping cart = 12.3 kgForce = 10.1 NInitial velocity, u = 0 m/s (since the cart is starting from rest). Time, t = 2.50 seconds.a. To find the acceleration of the cart, we would apply Newton's Second Law of Motion:
Mathematically, Newton's Second Law of Motion is given by this formula;
[tex]Acceleration = \frac{Force}{Mass}[/tex]
Substituting the given values, we have;
[tex]Acceleration = \frac{10.1}{12.3}[/tex]
Acceleration = 0.821 [tex]m/s^2[/tex]
Therefore, the acceleration of the cart, is 0.821 [tex]m/s^2[/tex].
b. To find the distance covered by the shopping cart, we would use the second equation of motion.
Mathematically, the second equation of motion is given by the formula;
[tex]S = ut + \frac{1}{2} at^2[/tex]
Where:
S is the distance covered. u is the initial velocity. a is the acceleration. t is the time measured in seconds.Substituting the values into the formula, we have;
[tex]S = 0(2.5) + \frac{1}{2} (9.8)(2.5)^2\\\\S = 0 + 4.9(6.25)[/tex]
Distance, S = 30.63 meters.
Therefore, the car moved a distance of 30.63 meters starting from rest.
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when the wavelength is tripled at a constant frequency, what happens to the velocity of the wave?
a. it is tripled
b. it remains the same
c. it decreases to half the original value
d. it increases to six times the original value
Answer:
increases over time is the correct answer
Explanation:
force prevents things from floating above the ground. *
frictional
muscular
gravitational
The NGC 3603 region of space is shown below. It is a
cloud of gas and dust. Stars are forming in this cloud,
How would NGC 3603 be classified?
O A. As a galaxy
O B. As a nebula
O C. As a planet
D. As a solar system
Answer:
A. NGC 3603 would be classified as Nebula
Explanation:
Look at the diagram B. What is happening in diagram B ?
Answer:
a lens is scattering light
Explanation:
Diagram B shows a plano concave lens. Plano-Concave lenses bend parallel input rays to diverge from one another on the output side of the lens and hence have a negative focal length.
In the given figure, a Plano concave lens is shown. It scatters light. The image is formed in front of lens. The formed image is virtual.
Hence, the correct option is (c) "a lens is scattering light".
A car is traveling at 10 m/s. 10 seconds later the car is traveling 40 m/s. What is the car’s acceleration?
Answer:
a = 3 m/s^2
Explanation:
Vi = 10 m/s
Vf = 40 m/s
t = 10 s
Plug those values into the following equation:
Vf = Vi + at
40 = 10 + 10a
---> a = 3 m/s^2
The car is traveling with an initial velocity of 10 m/s, a final velocity of 40 m/s in the time period of 10 seconds, then the acceleration of the car is 3 m/s².
What is acceleration?Acceleration describes a change in an object's velocity. By accelerating, decelerating, or changing direction of motion, an object's velocity may change.
An apple falling to the ground, the moon orbiting the earth, and a car stopping at a set of traffic lights are a few examples of acceleration. With the aid of these illustrations, we may better see that acceleration occurs whenever a moving object modifies its direction, speed, or both.
The given values according to the question are,
Initial velocity, u = 10 m/s
Final velocity, v = 40 m/s and,
Time, t = 10 seconds.
Use the equation of motion to find the acceleration,
v = u + at
40 = 10 + (a)10
a = 30/10
a = 3 m/s².
Hence, the acceleration of the car is 3 m/s².
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It is common problem to a physically active person who is experiencing dizziness, fatigue, dark-colored urine, and extreme thirst.
Answer:
Look below.
Explanation:
All the symptoms provided points to the common problem of dehydration. Especially a physically active person because they are constantly sweating which leads to the loss of bodily fluids and dehydration.
3) Magnets are used to separate steel cans from aluminum cans in recycling plants. How can
they be used for this?
(Will give brainliest if it's a proper answer)
Answer:
Since steel contains iron (a magnetic metal), the magnets will attract the steel cans since aluminum is not magnetic. This is used to separate the steel cans from the aluminum cans so they can be recycled separately.
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Answer:
Explanation:
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