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
Amiraneli [1.4K]
4 years ago
15

A certain nuclear power plant is capable of producing 1.2×10^9 W of electric power. During operation of the reactor, mass is con

verted to energy. How much mass is converted per hour if the efficiency of the plant is 30 percent? (Answer is in kilograms)
Physics
1 answer:
alukav5142 [94]4 years ago
6 0

Answer:

0.00016 kg

Explanation:  

Given:

Power = P = 1.2 × 10⁹ Watts

Power =  work done / Time

efficiency = 0.30

Input power = 1.2 × 10⁹ / 0.30 =  4  × 10⁹ W

Energy =  4  × 10⁹ x 60 x 60 = 1.44 x 10¹³ joules

E = m c² , where c is the speed of light and m is the mass.

⇒ mass = m = E / c²  = (1.44 x 10¹³) / (3 × 10⁸ )²

                                   = 0.00016 kg

You might be interested in
[C]utting programs that were not effective or essential and even some that were, but are now unaffordable; and precisely targeti
zalisa [80]

Option B i.e discretion is the right and correct answer.

[C]utting programs that were not effective or essential and even some that were, but are now unaffordable; and precisely targeting our investments. Every department will feel the impact of these reductions as they cut programs or tighten their belts to free up more resources for areas critical to economic growth. —President Barack Obama, 2012 Budget Message of the President.

The President above clearly refers to the Discretion Spending where portion of the budget is decided by Congress through the annual appropriations.

3 0
3 years ago
Read 2 more answers
Help please explain!!!
zalisa [80]
Newton's first law of motion. An object in motion tends to stay in motion. Since there is no friction in space to slow it down it just keeps going
5 0
3 years ago
8: As a grade-school project, students construct a mobile representing some of the major food groups.
Airida [17]

Answer:

m1=0.72kg m2=0.48kg m3=0.98

Explanation:

12*m1=18*m2, so 2*m1=3*m2

6*(m1+m2)=24*.03, so 2*m1+2*m2=2.4

so, 5*m2=2.4, m2=0.48 then, m1=0.72

(m1+m2+0.3+0.2)*18=31*m3

1.7*18=31*m3

m3=0.98

4 0
3 years ago
An object floats in water with 5 8 of its volume submerged. The ratio of the density of the object to that of water is
ki77a [65]

Answer:

\dfrac{5}{8}

Explanation:

m = Mass of object = \rho v

m' = Mass of water = \rho' v'

\rho = Density of object

\rho' = Density of water

Weight of the water displaced is the force in the case of floating objects

According to the question

v'=\dfrac{5}{8}v

In the case of floating objects

W=W'\\\Rightarrow mg=m'g\\\Rightarrow \rho vg=\rho'v'g\\\Rightarrow \rho v=\rho' \dfrac{5}{8}vg\\\Rightarrow \rho=\rho' \dfrac{5}{8}\\\Rightarrow \dfrac{\rho}{\rho'}=\dfrac{5}{8}

The ratio of the density of the object to that of water is \dfrac{5}{8}

3 0
3 years ago
The more testing we have that confirms a hypothesis,
Sidana [21]
I think it is b. but i dont now
5 0
3 years ago
Other questions:
  • What type of simple machine is found in a wheelbarrow?<br><br> Lever<br><br> Wedge
    12·2 answers
  • When is the data considered valid
    12·1 answer
  • A bug is sitting on the edge of a rotating disk. At what angular velocity will the bug slide off the disk if its radius is 0.241
    5·1 answer
  • high school physics, no need detail explain, just give the answer, but you have to make sure thank you
    5·1 answer
  • what is the dot product and cross product of of two vectors if the angle is between them is 90 degree?​
    5·2 answers
  • A 10 kg mass car initially at rest on a horizontal track is pushed by a horizontal force of 10 N magnitude. If we neglect the fr
    10·1 answer
  • Does it take more force to slow something down than to speed it up.
    15·1 answer
  • To Play Ice Hockey each player needs
    13·2 answers
  • What time does the clock go back for daylight savings
    14·1 answer
  • a bicycle uniformly from rest at time t the velocity of the bicycle is v at what time will the bicycle have a velocity of 4v​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!