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3 years ago

8

The rumble feature on a video game controller is driven by a device that turns electrical energy into mechanical energy. This de

vice is best referred to as

1 answer:

AnnyKZ [126]3 years ago

6 0

Answer:

MOTOR

Explanation:

The device which changes electrical energy into mechanical energy is known as motor

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A cosmic ray travels 60.0 km through the earth's atmosphere in 500 μs , as measured by experimenters on the ground. You may want

zavuch27 [327]

Answer:

t' = 458.26 μs

Explanation:

given,

distance traveled by the cosmic ray = 60 Km

time = 500 μs

time taken for the journey according to cosmic ray = ?

now,

$v =\dfrac{distance}{time}$

$v =\dfrac{60\times 10^3}{500\times 10^{-6}}$

v = 1.2 x 10⁸ m/s

according to time dilation formula

$t' = t\sqrt{1-\dfrac{v^2}{c^2}}$

$t' = 500\sqrt{1-\dfrac{(1.2\times 10^8)^2}{(3\times 10^8)^2}}$

t' = 500 x 0.9165

t' = 458.26 μs

6 0

3 years ago

Consider a ship of mass 2 x 10^6 kg with propeller blades of radius 7 m and it can push water backwards to a speed of 2 m/s. Giv

PolarNik [594]

Answer:

$a = 0.308 m/s^2$

Explanation:

As we know that the force due to propeller when it will push the water backwards is given as

$F = \frac{dP}{dt}$

now we know that

$P = mv$

so we have

$F = v\frac{dm}{dt}$

$F = v \rhoA\frac{dx}{dt}$

$F = \rho A v^2$

here we know that

$A = \pi r^2$

$A = \pi(7^2)$

$A = 154 m^2$

now the force is given as

$F = (1000)(154)(2^2)$

$F = 616000 N$

now the acceleration of the ship is given by Newton's II law

$a = \frac{F}{m}$

$a = \frac{616000}{2 \times 10^6}$

$a = 0.308 m/s^2$

3 0

3 years ago

A light wave travels through water (n = 1.33) at an angle of 35°. What angle

Dovator [93]

Answer:1

Explanation:

1

4 0

3 years ago

Read 2 more answers

HeLp!!! PLEASE!!!

Sholpan [36]

Answer:

I don't know the first one but I think I know II

Explanation:

there there are more people people in cities than there are in rural areas and because of this more people will breathe cough get sick and pull it the air. plusplus there are no plants to keep the air clean but there are plants in rural areas.

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3 years ago

What causes sound energy to be produced? *<br><br> Speed<br> instruments<br> Vibration<br> Fluency

Daniel [21]

Sound energy is produced when an object vibrates. The sound vibrations cause waves of pressure that travel through a medium, such as air, water, wood or metal. Sound energy is a form of mechanical energy.

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3 years ago