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lesya692 [45]
3 years ago
6

Which statements explain the special theory of relativity? Check all that apply.

Physics
2 answers:
frozen [14]3 years ago
7 0

Answer:

A. Time and space are relative.

B. The speed of light in a vacuum is constant for all observers.

D. Physical laws change based on an observer's motion.

E. Physical laws remain constant regardless of an observer's motion.

Explanation:

asambeis [7]3 years ago
4 0

Answer:

A, B, D and E

Explanation:

Got it correct on Edgen! :)

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A 75 cm straight wire moves straight up through a 0.53 T magnetic field with a velocity of 16 m/s. What is the induced emf in th
Luden [163]

Answer:

Induced emf of the wire is 6.36 Volts.

Explanation:

It is given that,

Length of the wire, l = 75 cm = 0.75 m

Magnetic field, B = 0.53 T

Velocity, v = 16 m/s

The wire is moving straight up in the magnetic field. So, an emf is induced in the wire. It is given by :

\epsilon=Blv

\epsilon=0.53\ T\times 0.75\ m\times 16\ m/s

\epsilon=6.36\ V

So, the induced emf of the wire is 6.36 V. Hence, the correct option is (b) "6.36 V".

5 0
3 years ago
Read 2 more answers
Cuanta fuerza se necesita lara evitar que una piedra de 20N caiga?
Bogdan [553]

Answer:

Reaction is 20N.

Explanation:

In general, Newton's third law of motion explains that when a force is applied on an object, a reaction of equal magnitude applies in the reverse direction of the force.

i.e F = -R

This implies that, reaction is a force in the opposite direction to that of the force applied.

Force can also be related to the weight of an object as;

F = W = mg

Thus to prevent the 20N stone from falling, a force of 20N is applied in the opposite direction. So the reaction, R is 20N.

6 0
3 years ago
Electromagnetic waves travel at a speed of 3.0 x 108 m/s. A radio station transmits waves
Sophie [7]

Answer:

1.2×10⁶ Hz

Explanation:

Applying,

v = λf............. Equation 1

Where v = speed of wave, λ = wavelength, f = frequency.

make f the subject of the equation

f = v/λ............... Equation 2

From the question,

Given: v = 3.0×10⁸ m/s, λ = 2.5×10² m

Substitute these values into equation 2

f =  3.0×10⁸/2.5×10²

f = 1.2×10⁶ Hz

6 0
3 years ago
What happens to waves near the shore?
Lady_Fox [76]

Answer As a wave travels across the open ocean, it gains speed. When a wave reaches a shallow coastline, the wave begins to slow down due to the friction caused by the approaching shallow bottom. ... Think of it like driving a car at high speed and then slamming on the breaks. Everything is going to fly to the front.:Waves at the Shoreline: As a wave approaches the shore it slows down from drag on the bottom when water depth is less than half the wavelength (L/2). The waves get closer together and taller. ... Eventually the bottom of the wave slows drastically and the wave topples over as a breaker. hope this helps have a nice night❤️❤️❤️

Explanation:

8 0
3 years ago
ball a has half the mass and eight times the kinetic energy of ball b. what is the speed ratio vava / vbvb ?
d1i1m1o1n [39]

Ball b has eight times more kinetic energy than ball a, which has half its mass. The speed ratio is 4.

<h3>What exactly does kinetic energy mean?</h3>

Force must be applied to object in order to accelerate. To apply a force, we must work hard. Because energy has been transferred to the object, it will be moving at a new, constant speed once the operation is finished.

Given,

Two balls a and b

and the mass of ball an is half that of ball b..

Kinetic energy of ball a is eight times kinetic energy of ball b.

mₐ = \frac{1}{2} m_{b}

KEₐ = 8 KE_{b}

Kinetic energy is measured by,

KE = 1/2 mv²

KE ratios for both balls a and b are calculated,

∴ \frac{KE_{a} }{KE_{b} } = \frac{1/2 m_{a} v_{a}^{2}  }{1/2 m_{b} v_{b} ^{2} }

\frac{8 KE_{b}}{KE_{b} } = \frac{1/2 (1/2m_{b}) v_{a}^{2}  }{1/2 m_{b} v_{b} ^{2} }

16 = \frac{v_{a} ^{2} }{v_{b} ^{2} }

\frac{v_{a} }{v_{b} } = 4/1

To know more about kinetic energy, visit:

brainly.com/question/2302596

#SPJ4

4 0
1 year ago
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