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
Alika [10]
3 years ago
8

A ball is rolling a 5 m/s down a hill the ball has 20 J of energy what is the mass of the ball

Physics
1 answer:
Dmitriy789 [7]3 years ago
7 0

Its 1.6 kg

Remember

E = 1/2mv^2 is the kinetic energy of the ball. The energy is given to you so you need to solve for mass. Rearranging the equation gives you 2E/v^2 = 1.6

You might be interested in
How much energy (in kilojoules) is required to convert 200 mL of diethyl ether at its boiling point from liquid to vapor if its
LiRa [457]

Answer:

55.96kJ

Explanation:

Energy = mass of diethyl ether × enthalpy of vaporization of diethyl ether

Volume (v) = 200mL, density (d) = 0.7138g/mL

Mass = d × v = 0.7138 × 200 = 142.76g

Enthalpy of vaporization of diethyl ether = 29kJ/mol

MW of diethyl ether (C2H5)2O = 74g/mol

Enthalpy in kJ/g = 29kJ/mol ÷ 74g/mol = 0.392kJ/g

Energy = 142.76g × 0.392kJ/g = 55.96kJ

4 0
3 years ago
What is the explanation for the fact that the desert sand is very hot in the day and very cool at night? 1. Sand reflects light
zepelin [54]
3. Sand has a low specific heat compared to air
5 0
2 years ago
A car with a momentum of 1200 kg.m/s with a mass of 600 kg hit a trash can which was on the side of the road,If the mass of tras
GuDViN [60]
Speaking that the trash can absorb the momentum. It only should go 5
4 0
2 years ago
Read 2 more answers
Please help me:(
Lelechka [254]

Answer:B

Explanation:

I’m doing the same thing you are!

3 0
3 years ago
The thermosphere is characterized by a drastic increase in temperature. What is the reason for this increase? A. absorption of u
ExtremeBDS [4]

Answer:

A. absorption of ultraviolet rays from the Sun

Explanation:

The thermosphere helps protect and regulate Earth's temperature by absorbing much of the UV radiation and X-rays emitted by the Sun. When the Sun is most active, the thermosphere heats up and increases in size, increasing its protective power.

Just like in the oceans, the Earth's atmosphere experiences waves and tides that help move energy within it. The winds and the general circulation of the thermosphere are strong drivers of these tides and waves.

8 0
3 years ago
Other questions:
  • the volume of ice block is 2400cm^3 and its density is 0.9 g/cm^3. how much part of it remains above the surface of water when i
    13·1 answer
  • Use the graph below to answer the following question: if average acceleration is calculated using the equation, “ change in velo
    15·1 answer
  • Which of the following values has the greatest number of significant figures? Justify your answer?
    8·1 answer
  • How are mass and weight different
    14·2 answers
  • Woman has a near point of 75.0 cm. What focal length, f, is necessary for the corrective lens so that he can hold his physics bo
    8·1 answer
  • Pls help will mark brain
    11·1 answer
  • Q3. A large block of stone is held at a height of 15m having gained 4500J
    8·1 answer
  • A loaf of bread has a mass of 2000g and a volume of 500 cm3. what is the density of the bread
    6·1 answer
  • Un Iceberg, con forma aproximada a la de un paralelepípedo (rectángulo en 3D), flota en el mar de modo que la parte fuera del ag
    12·1 answer
  • Which of the following relationships determines an object’s ability to float in a liquid?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!