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mario62 [17]
3 years ago
7

What does friction oppose

Physics
1 answer:
Mekhanik [1.2K]3 years ago
7 0

Answer:

Friction opposes motion.

Explanation:

If there is relative motion, the frictional force is the kinetic force of friction.

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Hiran is standing beside the road when he hears a bird flying away from hip and chirping. The bird’s chirp has a frequency of 18
Murrr4er [49]

The frequency of bird chirping hear by hiran will be 1.77 kHz.

<u>Explanation:</u>

As per Doppler effect, the observer will feel a decrease in the frequency of the receiving signal if the source is moving away from the observer. So the shifted frequency is obtained using the below equation:

f'=\frac{c}{c+v_{s} }f

Here , c is the speed of sound, Vs is the velocity of source with which it is moving away. f is the original frequency of source and f' is the frequency shift heard by the observer.

As here, f = 1800 Hz, Vs= 6 m/s and c = 343 m/s, then

f'=\frac{343}{343+6} \times 1800=1.77\ kHz

So, the frequency of bird chirping hear by hiran will be 1.77 kHz.

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3 years ago
When a machine is used to perform a task, work output is always more than work input. please select the best answer from the cho
Maurinko [17]
Properly input current above 40 voltage or 100 for example elecrical fan machine is used to perform a task, work output is always more than work
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4 years ago
Mercury, a planet in our Solar System, and Callisto, a moon of the planet Jupiter, are about the same size. However, Mercury’s m
TiliK225 [7]
You may jump higher because the more the mass of the planet, the more gravitational force. There is less mass(and gravity) on Callisto so you wouldn’t be weighed down as much and can jump higher. Whereas on Jupiter there is more weight holding you down.
3 0
3 years ago
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Which statement best describes a wave?
Leto [7]

Answer:

B.) A disturbance that carries energy

Explanation:

The complete statement that describes a wave would be :

A wave is a disturbance that carries energy from one place to another

Other listed options are incorrect because:

Incorrect : A.) A collision of particles ---------> Conduction

Incorrect : C.) A movement of fluids ----------> Convection

Incorrect : D.) A group of electrically charged molecules ----------> Radiation

[ Correct on Edgenuity ]

Hope this helps you have a better understanding ! :D

Have a wonderful day !

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3 years ago
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How does inertia affect someone who isn't wearing a seatbelt
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Basically, when someone is resting in an accelerated vehicle without restraint from a seatbelt, the force of stopping the vehicle will be when inertia occurs, and that force of the vehicle coming to a stop will affect the passenger (without a seatbelt/restraint from another force or object) greatly by throwing them.
For example;
If I were to be riding in a vehicle (without a seatbelt) that's accelerating at 40 m/s^2 and it suddenly gets slammed on the breaks, I will be thrown forward from inside the vehicle.

I hope this helps!
7 0
4 years ago
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