1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
WITCHER [35]
3 years ago
14

A ship is flying away from Earth at 0.9c (where c is the speed of light). A missile is fired that moves toward the Earth at a sp

eed of 0.5c relative to the ship. How fast does the missile move relative to the Earth
Physics
1 answer:
Sati [7]3 years ago
5 0

Answer:

the required speed with which the missile move relative to the Earth is -0.727c

Explanation:

Given the data in the question;

relative velocity relation;

u' = u-v / 1 - \frac{uv}{c^2}

so let V_B represent the velocity as seen by an external reference frame; u=V_B

and let V_A represent the speed of the secondary reference frame; v=V_A

hence, u' is the speed of B as seen by A

so

u' = V_B-V_A / 1 - \frac{V_BV_A}{c^2}

now, given that; V_A = 0.9c  and V_B  = 0.5c

we substitute

u' = ( 0.5c - 0.9c ) / 1 - \frac{(0.5c)(0.9c)}{c^2}

u' = ( 0.5c - 0.9c ) / 1 - \frac{c^2(0.5)(0.9)}{c^2}

u' = ( 0.5c - 0.9c ) / 1 - (0.5 × 0.9)

u' = ( -0.4c ) / 1 - 0.45

u' = -0.4c / 0.55

u' = -0.727c

Therefore, the required speed with which the missile move relative to the Earth is -0.727c

You might be interested in
A 0.5 kg mass on a spring undergoes simple harmonic motion with a total mechanical energy of 12 J. If the oscillation amplitude
Darya [45]

Answer:

The frequency of the oscillation is 2.45 Hz.

Explanation:

Given;

mass of the spring, m = 0.5 kg

total mechanical energy of the spring, E = 12 J

Determine the spring constant, k as follows;

E = ¹/₂kA²

kA² = 2E

k = (2E) / (A²)

k = (2 x 12) / (0.45²)

k = 118.519 N/m

Determine the angular frequency, ω;

\omega = \sqrt{\frac{k}{m} } \\\\\omega =  \sqrt{\frac{118.519}{0.5} } \\\\\omega = 15.396 \ rad/s

Determine the frequency of the oscillation;

ω = 2πf

f = (ω) / (2π)

f = (15.396) / (2π)

f = 2.45 Hz

Therefore, the frequency of the oscillation is 2.45 Hz.

8 0
2 years ago
A car travels at an average speed of 60km/h for 15 minutes. How far does the car travel in this time?
jok3333 [9.3K]

Answer:

In 15 minutes the car travels a distance of 15 km.

Explanation:

4 0
3 years ago
Read 2 more answers
If spring has a spring constant of 500 N/m and is stretched .50 meters,how much energy is stored in the spring ((show work for f
Free_Kalibri [48]

Answer:

The energy stored is: 62.5 Joules

Explanation:

Given

k = 500N/m --- spring constant

x = 0.5m --- stretch

Required

The amount of energy

This is calculated as:

U = \frac{1}{2} kx^2

U = \frac{1}{2} * 500N/m * (0.5m)^2

U = 250N/m * (0.5m)^2

U = 62.5\ J

7 0
3 years ago
What did you observe when food coloring was added to the glass that was not in the cake pan?
mezya [45]
No one can answer that kind of question since it was a specific project.
6 0
3 years ago
A platinum bar measures 5.0 cm long, 4.0 cm wide and 1.5 cm thick. it has a mass of 700.0 grams
goblinko [34]

Answer:

23.3 g/cm3

Explanation:

First of all, this should be in the math section. I just so happen to also be good at math. Cheers!

3 0
3 years ago
Other questions:
  • A girl moves quickly to the center of a spinning merry-go-round, traveling along the radius of the merry-go-round. Which of the
    7·1 answer
  • What variable does the slope represent?
    15·2 answers
  • What are you good at and hobbies?
    12·1 answer
  • An airplane flies at airspeed (relative to the air) of 280 km/h . The pilot wishes to fly due North (relative to the ground) but
    10·1 answer
  • Dry cells become soft even when not in use. Explain.
    10·1 answer
  • A submarine is stranded on the bottom of the ocean with its hatch 25 m below the surface. In this problem, assume the density of
    15·1 answer
  • 1)A sequência de uma entrevista depende da intenção pretendida do entrevistador e do meio de comunicação que será publicado. Nor
    5·1 answer
  • A ball is rolling across the floor at a constant speed. What will happen to the ball if it is exposed to an unbalanced force in
    14·2 answers
  • A 50.0 kg crate is pulled 375 N of force applied to a rope. The crate slides without friction.
    9·1 answer
  • What does a snow leopard eat?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!