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matrenka [14]
3 years ago
6

What is The common value for the speed of light in a vacuum

Physics
1 answer:
Talja [164]3 years ago
4 0
The most common value for the speed of light is 3*10^8 meters/second.

A more accurate number is <span>299 792 458 m/second, but that number is hardly ever used.</span>
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Which is an action that can cause an object to move or change its state of motion
vova2212 [387]
The answer is force.
8 0
2 years ago
A push broom is being pushed down across a rough floor. The broom moves to the right. What is the correct free body diagram of t
zysi [14]
The far right.

Fg is gravity which always acts down and since we assume the floor is flat the normal, Fn, acts opposite gravity, so straight up.

But you’re probably wondering about the pushing force, Fp, and the friction force, Ff. For the Fp, consider where the applied force is coming from. The head of the broom is on the floor and the man’s arms, where he’s applying the force from, is above and to the left, so when the man pushes the broom the force is down and to the right. The broom my not be moving down, but the applied force is still in that direction. And Ff always acts against motion so since the broom moves to the right, the friction is to the left.

5 0
3 years ago
Read 2 more answers
A wheel on a car is rolling without slipping along level ground. The speed of the car is 36 m/s. The wheel has an outer diameter
lutik1710 [3]

Answer:

The speed of the top of the wheel is twice the speed of the car.

That is: 72  m/s

Explanation:

To find the speed of the top of the wheel, we need to combine to velocities: the tangential velocity of the rotating wheel due to rotational motion (v_t=\omega\,R=\omega\,(0.25\,m)\,) - with \omega being the wheel's angular velocity,

plus the velocity due to the translation of the center of mass (v = 36 m/s).

The wheel's angular velocity (in radians per second) can be obtained using the tangential velocity for the pure rotational motion and it equals:\omega=\frac{v_t}{r} =\frac{36}{0.25} \,s^{-1}

Then the addition of these two velocities equals:

\omega\,R+v=\frac{36}{0.25} (0.25)\,\,\frac{m}{s} +36\,\,\frac{m}{s} =72\,\,\frac{m}{s}

7 0
3 years ago
Which of the following statements is true regarding electromagnetic waves traveling through a vacuum?
kap26 [50]

Answer:

C. All waves have the same speed.

Explanation:

Wave equation is given as;

V = fλ

where;

V is the speed of the wave

f is the frequency of the wave

λ is the wavelength

The speed of the wave depends on both wavelength and frequency

The speed of the electromagnetic waves in a vacuum is 3 x 10⁸ m/s, this also the speed of light which is constant for all electromagnetic waves.

Therefore, the correct option is "C"

C. All waves have the same speed.

6 0
3 years ago
A mouse spots an owl flying 10.1 feet over a nearby bush. The mouse is 30 feet away from the bush, and it sees the owl at a cert
Anna11 [10]

Answer:

Explanation:

Given

fly is at height of h=10.1\ ft

mouse is at a distance of 30 ft from bush

if \theta  is the angle of elevation then

using trigonometric relation

\tan \theta =\frac{h}{x}

\tan \theta =\frac{10.1}{30}

\theta =tan^{-1}(\frac{10.1}{30})

\theta =18.57^{\circ}

           

6 0
3 years ago
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