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
valentina_108 [34]
3 years ago
8

A 1.8 kg book had been dropped from the top of the football stadium. It's speed is 4.8 m/s when it is 2.9 meters above the groun

d what is its mechanical energy?
Physics
1 answer:
MrRissso [65]3 years ago
4 0

Answer:

72.936 Joule

Explanation:

Mechanical Energy = Potential Energy + Kinetic Energy

Kinetic Energy = (1/2) x m x V² = (1/2) x 1.8 x 4.8² = 20.736 J

Potential Energy = m x g x h = 1.8 x 10 x 2.9 = 52.2 J

Total Mechanical Energy = 20.736 + 52.2 = 72.936 Joule

You might be interested in
When does it start to cool down in arizona?
KatRina [158]
<span>It starts to cool down in Arizona in mid-October.  The weather remains good in October- April and the heat tends to break in mid of October. The time when it is coldest in Arizona in December or January. However, it's too hot in the month of July and Rain becomes common in Spring season.</span>
7 0
3 years ago
Write a question about how changing temperature affects gas
Lera25 [3.4K]

Answer:

"How does the volume of a gas kept at constant pressure change as its temperature is increased?"

Explanation:

One possible question can be:

"How does the volume of a gas kept at constant pressure change as its temperature is increased?"

The answer to this question is contained in Charle's law, which states that for a gas at constant pressure, the volume of the gas is proportional to its absolute temperature:

V\propto T

Or also written as

\frac{V}{T}=const.

By looking at this equation, we can find immediately the answer to our question: as the (absolute) temperature of the gas increases, the volume increases as well, by the same proportion.

3 0
3 years ago
Explain how atomic interactions determine a material to be transparent and opaque?
motikmotik

Answer:

Explanation below.

Explanation:

It should be understood that transparency is caused through or by the transmission of light waves. This means that, If or when the energy known as the vibrational energy of a light wave is passed through the object, then the object appears clear, or transparent. And when or If the energy only causes vibrations in the surface before reflecting off the object, then the object will appear opaque, that is nontransparent.

7 0
3 years ago
Most radiation exposure comes from
Mrrafil [7]
Most radiation exposure comes from natural sources. These so-called "natural sources" include Radon, Internal, Terrestrial, and Cosmic. Among that, Radon proves to be the largest source of radiation. Radon is a naturally occurring radioactive gas that comes from the breakdown of uranium.
5 0
4 years ago
Read 2 more answers
Does changing position of charges change the magnitude
hodyreva [135]

Answer:

No, they will not change.

Explanation:

7 0
3 years ago
Other questions:
  • The light intensity incident on a metallic surface with a work function of 3 eV produces photoelectrons with a maximum kinetic e
    10·1 answer
  • Which type of solute is least likely to dissolve in water
    15·2 answers
  • high school physics, no need detail explain, just give the answer, but you have to make sure thank you
    7·1 answer
  • Water from a fire hose is directed horizontally against a wall at a rate of 58.1 kg/s and a speed of 43.5 m/s. Calculate the mag
    14·1 answer
  • 1. A school bus moves at 15 m/s relative to Logan standing on the street. If Harrison walks towards the
    7·1 answer
  • Tension is actually a force that tends to
    7·2 answers
  • If a student connects two resistors to a circuit parallel would the total resistance increase, decrease or does it not change an
    8·1 answer
  • Which factors affect the speed of ocean waves?
    9·2 answers
  • What is a force? A. A force is a form of energy. B. A force is equivalent to work. C. A force is a substance that reacts with ma
    11·2 answers
  • Which is NOT true about oxygen-17 and oxygen-18?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!