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
poizon [28]
3 years ago
11

A book on a 2 meter high shelf has 20 Joules of potential energy.

Physics
1 answer:
Sever21 [200]3 years ago
4 0
Mass of this book is 1 kg.

You might be interested in
1. When you talk into your paper cup telephone, the person on the other end can feel the bottom
kodGreya [7K]

Answer:

The correct answer is - the sound waves make vibration that travels through the string.

Explanation:

When an individual person talks into your paper cup telephone the person on the other end can feel the bottom of their cup vibrate. The sound waves create vibration go through the string that travels through the string to the end of the cup where vibrations can feel.

The sound waves are longitudinal waves that move or travel through different mediums like air, solid, or gas. The waves create vibration in the particles.

You could create a paper cup telephone but instead of using string, test out different materials and see if those materials will allow sound vibrations to travel through them

7 0
3 years ago
9. If a car travels 18,000 meters in 30 minutes, what is its average speed?
MrRa [10]

Answer:

10m/s

Hope this helps!

5 0
3 years ago
Which of the following element has seven total valence electrons? Your answer: argon helium oxygen bromine
GalinKa [24]

Answer:

bromine

Explanation:

Any element in the halogen group will have seven valence electrons. These elements include fluorine, chlorine, bromine, iodine, and astatine

6 0
3 years ago
A stone is thrown vertically upward at a speed of 41.50 m/s at time t=0. A second stone is thrown upward with the same speed 3.0
lubasha [3.4K]

Answer:

t1 = t2 + 3.02         V = 41.5

V t1 - 1/2 g t1^2 = V t2 - 1/2 g t2^2

Both stones reach the same height after the specified times

V (t1 - t2) = g/2 (t1^2 - t2^2) = g/2 (t1 - t2) (t1 + t2)

2 V / g = t1 + t2 = 2t1 + 3.02

t1 = V / g - 1.51 = 41.5 / 9.8 -1.51 = 2.72 s

t2 = t1 + 3.02 = 5.74 sec

Check:

41.5 * 2.72 - 4.9 * 2.72^2 = 76.6 m

41.5 * 5.74 - 4.9 * 5.74^2 = 76.8 m

Speed of second stone = 41.5 - 9.8 * 2.72 = 14.8 m/s

7 0
3 years ago
HELP PLS.<br><br><br>What are the characteristics of the three states of matter?
vredina [299]

Matter can exist in one of three main states: solid, liquid, or gas. Solid matter is composed of tightly packed particles. A solid will retain its shape; the particles are not free to move around. Liquid matter is made of more loosely packed particles. Hopefully this helps:)

5 0
3 years ago
Read 2 more answers
Other questions:
  • A uniformly charged rod (length = 2.0 m, charge per unit length = 5.0 nc/m) is bent to form one quadrant of a circle. what is th
    15·1 answer
  • HELP PLEASE!<br>Can anyone help with any of these?
    12·1 answer
  • A power source of 6.0 V is attached to the ends of a capacitor. The charge is 12 C.
    8·2 answers
  • Coasting due west on your bicycle at 8.4 m/s, you encounter a sandy patch of road 7.2 m across. When you leave the sandy patch,
    13·1 answer
  • "The work done on an ideal gas system in an isothermal process is -400 J. What is the change in internal (thermal) energy of the
    12·1 answer
  • What are three ways in which heat is transferred
    9·1 answer
  • A gram is the basic metric unit for measuring which of the following?
    9·2 answers
  • Two students, sitting on frictionless carts, push against each other. Both are initially at rest and the mass of student 1 and t
    8·1 answer
  • When the plutonium bomb was tested in New Mexico in 1945, approximately 1 gram of matter was converted into energy. Suppose anot
    14·1 answer
  • If a 50 N force was applied to a really massive object as well as a tiny object, what can you say
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!