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
dolphi86 [110]
3 years ago
7

A book starts on a shelf 1 m off of the ground. You then move the book to a higher shelf that is 3 m off of the ground. If the s

ystem gained 20 J of gravitational potential energy, what is the mass of the book?
Physics
1 answer:
JulsSmile [24]3 years ago
4 0

Answer:

Using g = 9.8: 1.02 kg, Using g = 10: 1 kg

Explanation:

E = mgh

20 = m(9.8)(3 - 1)

20 = 9.8m(2)

20 = 19.6m

m = 1.02 kg

I'm now assuming you may be using a g constant of 10, thus the close integer result, in which case the mass would be exactly 1 kilogram.

You might be interested in
True or false The cardiovascular system includes the heart and blood vessels.
love history [14]
The answer to this question is false
5 0
3 years ago
Read 2 more answers
State the success of j j Thompson model theory​
vovikov84 [41]

Answer:

Thomson's atomic model was successful in explaining the overall neutrality of the atom. However, its propositions were not consistent with the results of later experiments. In 1906, J. J. Thomson was awarded the Nobel Prize in physics for his theories and experiments on electricity conduction by gases.

Summary. J.J. Thomson's experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. Thomson proposed the plum pudding model of the atom, which had negatively-charged electrons embedded within a positively-charged "soup."

4 0
3 years ago
Read 2 more answers
Help ASAP <br><br>Identify the cause of foliation in rocks?
rewona [7]
When minerals are exposed to high pressure and temperatures, the individual minerals begin to realign themselves
5 0
3 years ago
If a sled has a mass of 4kg what is the force of gravity on the sled?
ale4655 [162]

Answer:

Explanation:

Gravity pulls everything down at the same rate of 9.8 m/s/s. If you're looking for the normal force, which is the same as the weight of the object, we'll find that, just in case.

w = mg which says that the normal force/weight of an object is equal to its mass times the pull of gravity:

w = 4.0(9.8) so

w = 39N

7 0
3 years ago
Two identical conducting spheres, A and B, carry equal charge. They are separated by a distance much larger than their diameters
Vesnalui [34]

Answer:

C. \frac{3F}{8}

Explanation:

Let initial charges on both spheres be,q

F=\frac{Kq^2}{d^2}   \ \ \  \ \ \  \ \ \  \ \_i

When the sphere C is touched by A, the final charges on both will be,\frac{q}{2}

#Now, when C is touched by B, the final charges on both of them will be:

q_c=q_d=\frac{q/2+q}{2}\\\\=\frac{3q}{4}\\

Now the force between A and B is calculated as:

F\prime=\frac{k\times\frac{q}{2}\times \frac{3q}{4}}{d^2}\\F\prime=\frac{3F}{8}

Hence the electrostatic force becomes 3F/8

4 0
3 years ago
Other questions:
  • Recall that the spring constant is inversely proportional to the number of coils in the spring, or that shorter springs equate t
    6·1 answer
  • As a hiker in Glacier National Park, you are looking for a way to keep the bears from getting at your supply of food. You find a
    9·1 answer
  • Which statement is true about the inner planets of our solar system
    7·1 answer
  • If the federal government imposed an obligation on Texas to retrofit all its oil and gas pipelines with modern technology to eli
    15·1 answer
  • The principal limitation of wind power is unpredictability. Please select the best answer from the choices provided
    13·2 answers
  • The intensity at distance from a spherically symmetric sound source is 100 W/m2. What is the intensity at five times this distan
    15·1 answer
  • At the particle level, the weakest of the fundamental forces is:
    9·2 answers
  • If given a device that has unknown circuitry, and you measure that the voltage across the device leads the voltage across a resi
    5·1 answer
  • Einstein calculated that ripples of gravity travel at exactly the speed of _____
    11·1 answer
  • Two particles of a gas collide. Why is this considered an elastic collision? (1 point)
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!