Somone help me please!!

A spaceship is moving at 0.74 c (0.74 times the speed of light) with respect to the earth. An observer on the spaceship measures

olya-2409 [2.1K]

Answer:

The time interval is 22.76 hr.

Explanation:

Given that,

Time = 30 hrs

Speed = 0.74c

We need to calculate the time interval measured in earth frame

Using formula of time dilation

$\Delta t=\dfrac{\Delta t_{0}}{\sqrt{1-\dfrac{v^2}{c^2}}}$

Where, $\Delta t$ = time interval measured in earth frame

$\Delta t_{0}$ =proper time interval

Put the value into the formula

$\Delta t=\dfrac{30}{\sqrt{1-\dfrac{0.74c^2}{c^2}}}$

$\Delta t=\dfrac{30}{\sqrt{1-(0.74)^2}}$

$\Delta t=\dfrac{30}{0.6726}$

$\Delta t=44.60\ hr$

We need to calculate the proper time interval when the velocity is 0.86c

Using formula of time dilation

$44.60=\dfrac{\Delta t_{0}}{\sqrt{1-\dfrac{0.86c^2}{c^2}}}$

$\Delta t_{0}=44.60\times\sqrt{1-(0.86)^2}$

$\Delta t_{0}=22.76\ hr$

Hence, The time interval is 22.76 hr.

3 0

3 years ago

A surveyor measures the distance across a straight river by the following method: Starting directly across from a tree on the op

VikaD [51]

Answer:

W = 85.73 m

Explanation:

given,

surveyor walks = 118 m

makes an angle of = 36.0° with the tree

to find the width of the river

$tan \theta = \dfrac{W}{distance}$

$tan 36^0 = \dfrac{W}{118}$

$W = 118 \times 0.7265$

W = 85.73 m

hence, the width of the river is equal to W = 85.73 m

3 0

3 years ago

If two different sized objects have the same density, what can you conclude about the object?

sladkih [1.3K]

Short Answer: YES

Long answer:

Density is generally regardless of how big or small a substance is and is neither dependant on its shape. A statue made of gold and a brick made of gold might have different masses and volume but they have same density.

By universal definition, density of a substance is the mass per unit volume.

D = Mass/Volume

6 0

4 years ago

t. In the fig. the long straight wires at separatioad-16.0 cm carr currents i1=3.6 mA and i2=3.00 i1 out the page a, were on the

timurjin [86]

hope it will help

if it is wrong let me know

8 0

2 years ago

Which has greater density- 1 kg of water or 10kg of water?

nata0808 [166]

Answer:

I believe that it will be 10kg of water

Explanation:

Because a measure of the amount of information on a storage medium (tape or disk). For magnetic tape it is the amount of information recorded per unit length of tape (bits per inch or millimeter); for a disk, a fixed number of bits per sector, sectors per track, and tracks per disk.

5 0

3 years ago

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