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3 years ago

Using at least 3 to 4 complete content related sentences describe the first and second postulate of special relativity.

2 answers:

8 0

Nothing can travel faster than the speed of light. As such, perceptions of objects and time change as they approach light speed, but the laws of physics remain consistent regardless of speed. Objects will appear shortened and time will appear to slow down around an observer approaching near light speeds, but all quantities still exist as they did before and all causality is preserved, even if observers in different points or traveling at different speeds will report different things.

andreev551 [17]3 years ago

6 0

Answer:

Inertial frames of reference are at rest or move at constant speed unlike non-inertial frames of reference which are accelerating frames of reference.

According to first postulate of the special theory of relativity, all the laws of physics hold true in all the inertial frames of reference. According to the second postulate, the speed of light (c) is constant everywhere and is independent of the relative motion of the source of light.

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You are fixing the roof of your house when a hammer breaks loose and slides down. The roof makes an angle of 65o∘ with the horiz

Verizon [17]

Answer:

$v_x\approx4.0149\ m.s^{-1}$

$v_y\approx-8.6099\ m.s^{-1}$

Explanation:

Given:

initial speed of the hammer when leaving the edge of the roof along the inclination of the roof, $v=9.5\ m.s^{-1}$

inclination of the roof form horizontal, $\theta=65^{\circ}$

Since the hammer is moving from the top of the roof to the right edge, its horizontal component will be towards right and vertical component will be towards downward direction.

Now the horizontal velocity:

$v_x=v.\cos\theta$

$v_x=9.5\times \cos65^{\circ}$

$v_x\approx4.0149\ m.s^{-1}$

The vertical velocity:

$v_y=-v.\sin\theta$

$v_y=-9.5\times \sin65^{\circ}$

$v_y\approx-8.6099\ m.s^{-1}$

5 0

3 years ago

you (60 kg) are standing in a (500 kg) elevator that is moving upwards from a ground floor on a building what is the power ratin

PtichkaEL [24]

Explanation:

Power = work / time

Power = force × distance / time

P = (650 kg) (10 m/s²) (20 m) / (15 s)

P = 8667 W

5 0

3 years ago

Suppose 500 joules of work is done to push an object in 15 seconds. Find the power for this situation

ohaa [14]

Answer:

You have to calculate

Explanation:

Work is done when a force that is applied to an object moves that object. The work is calculated by multiplying the force by the amount of movement of an object (W = F * d). A force of 10 newtons, that moves an object 3 meters, does 30 n-m of work.

5 0

3 years ago

Please solve this for me

uranmaximum [27]

See if you get the answer with this formulae.

6 0

2 years ago

Keaton is asked to solve the following physics problem:

RideAnS [48]

Answer:

The answer is C "think about the problem first, systematically consider all factors, and form a hypothesis"

Explanation:

In physics there is some basic fomula that sir Isacc Newton proposed under the topic of motion. The three formulas are below;

1) v=u+at

2)v^2=u^2+2as

3)s=ut+(1/2)(at^2)

the variables are explained below;

u= initial velocity of the body

a=acceleration/Speed of the body

t= time taken by the body while travelling

s= displacement of the body.

Therefore to solve keatons problem, the factors(variables) in the formulas above need to be systematically considered. Since the ball was dropped from the top of the building, the initial velocity is 0 because the body was at rest. Also the acceleration will be acceleration due to gravity (9.8m/s^2)

5 0

3 years ago