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
AlexFokin [52]
3 years ago
8

Future space rockets might propel themselves by firing laser beams, rather than exhaust gases, out the back. The acceleration wo

uld be small, but it could continue for months or years in the vacuum of space. Consider a 1200 kg uncrewed space probe powered by a 15 MW laser. After one year, how far will it have traveled and how fast will it be going
Physics
1 answer:
Nina [5.8K]3 years ago
8 0

Answer:

Acceleration = 0.0282 m/s^2

Distance = 13.98 * 10^12 m

Explanation:

we will apply the energy theorem

work done = ΔK.E ( change in Kinetic energy )  ---- ( 1 )

<em>where :</em>

work done = p * t

                  = 15 * 10^6 watts * ( 1 year ) = 473040000 * 10^6 J

( note : convert 1 year to seconds )

and ΔK.E = 1/2 mVf^2   given ; m = 1200 kg  and initial V = 0

<u>back to equation 1 </u>

473040000 * 10^6  = 1/2 mv^2

Vf^2 = 2(473040000 * 10^6 ) / 1200

∴ Vf = 887918.92 m/s

<u>i) Determine how fast the rocket is ( acceleration of the rocket )</u>

a = Vf / t

  = 887918.92 / ( 1 year )

  = 0.0282 m/s^2

<u>ii) determine distance travelled by rocket </u>

Vf^2 - Vi^2 = 2as

Vi = 0

hence ; Vf^2 = 2as

s ( distance ) =  Vf^2 / ( 2a )

                     = ( 887918.92 )^2 / ( 2 * 0.0282 )

                    = 13.98 * 10^12 m

You might be interested in
The family is the principal social agent for a. Children. C. Parents. B. Teenagers. D. The elderly. Please select the best answe
Sidana [21]

hope this helps A children

5 0
3 years ago
A dipole of moment 0.5 e·nm is placed in a uniform electric field with a magnitude of 8 times 104 N/C. What is the magnitude of
Over [174]

Answer:

The net torque is zero

Explanation:

Let's assume that the dipole is compose of two equal but oposite charges e, and it cam be represented by a rod with one end having a charge e and the other end with a charge of -e. Notice that the dipole is parallel to the electric field thus the force felt by both of the charges will be parallel to the electric field. This means that there will be no components of the forces that are perpendicular to the rod which is a requirement for it to have a torque.

8 0
3 years ago
how long will it take you to travel from rustburg hign school to watch the Devils beat the brookville bees if you live 20 miles
tresset_1 [31]

(20 miles) x ( 1/45  hour/mile) = 

       (20/45) (hour) = <em>

         4/9  hour =    </em>
26 minutes  40 seconds


7 0
3 years ago
Which of the following is an example of an endothermic reaction?
il63 [147K]

Answer:

D, photosynthesis

Explanation:

6 0
3 years ago
Read 2 more answers
An experiment is performed in the lab, where the mass and the volume of an object are measured to determine its density. Two com
navik [9.2K]

Answer:

d. the same within the uncertainty of each measurement method

Explanation:

The density of an object and in general any physical property, has the same value regardless of the method used to measure it, either directly or indirectly. Since two completely different valid methods are used, the results must be the same, taking into account the level of precision of each of the methods.

8 0
3 years ago
Other questions:
  • A 15-g bullet pierces a sand bag that is 48cm thick. The initial speed of the bullet is 39 m/s and it emerged from the sandbag a
    10·1 answer
  • In an experiment if doubling the manipulated variable results in doubling of the responding variable the relationship between th
    14·1 answer
  • The specific resistance of wire​
    12·1 answer
  • Pedal Power A person in good physical condition can put out 95 W of useful power for several hours at a stretch, perhaps by peda
    14·1 answer
  • Active transport is a process that uses energy to move materials through a
    7·1 answer
  • A light horizontal spring has a spring constant of 138 N/m. A 3.35 kg block is pressed against one end of the spring, compressin
    5·1 answer
  • Take the distance between the Earth and the Sun to be 149,500,000,000 m. Calculate the velocity of the Earth in its
    15·1 answer
  • A gray kangaroo can bound across level ground with each jump carrying it 8.7 from the takeoff point. Typically the kangaroo leav
    13·1 answer
  • Write the electric field at point p in component form. assume that x-axis is horizontal and points to the right, and y-axis poin
    6·1 answer
  • Plz, Help I just need this question to be answered so I can be done with this worksheet.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!