8. Thermochemistry
Kinetic & Potential Energy
8. Thermochemistry
Kinetic & Potential Energy - Video Tutorials & Practice Problems
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Mechanical Energy is the energy associated with an object's velocity (Kinetic Energy) and its position (Potential Energy).
Kinetic Energy & Potential Energy
1
concept
Kinetic & Potential Energy
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The kinetic energy of a gas molecule is connected to its mass in kilograms and velocity in meters per second.
The potential energy of a gas molecule is connected to its mass, acceleration due to gravity and height above the ground.
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example
Kinetic & Potential Energy Example 1
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3
Problem
ProblemA radioactive particle weighing 7.20 x 103 ng is found 110 m above the earth's surface. What is its potential energy?
A
7.8 x 10-6 J
B
7.2 x 10-9 J
C
7.9 x 10-9 J
D
7.2 x 10-6 J
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concept
Kinetic & Potential Energy
Video duration:
34sPlay a video:
5
example
Kinetic & Potential Energy Example 2
Video duration:
2mPlay a video:
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PRACTICE PROBLEMS AND ACTIVITIES (19)
- The accompanying photo shows a pipevine swallowtail caterpillar climbing up a twig. (a) As the caterpillar cli...
- Consider the two spheres shown here, one made of silver and the other of aluminum. (d) If you release the sphe...
- An electron with a mass of 9.1 * 10-28 g is traveling at 1.8 * 107 m/s in an electron microscope. Calculate th...
- (b) Why does increasing the temperature cause a solid substance to change in suc- cession from a solid to a li...
- (a) Calculate the kinetic energy, in joules, of a 15-g bullet moving at 120 m/s.
- Two positively charged particles are first brought close together and then released. Once released, the repuls...
- For each of the following processes, does the potential energy of the object(s) increase or decrease? (b) Wat...
- What is the kinetic energy and velocity of the aluminum sphere in Problem 1.4 at the moment it hits the ground...
- What is the difference between heat and temperature? Between work and energy? Between kinetic energy and poten...
- Which has more kinetic energy, a 1400-kg car moving at 115 km/h or a 12,000-kg truck moving at 38 km/h?
- Which has more kinetic energy, a 1400 kg car moving at 115 km/h or a 12,000 kg truck moving at 38 km/h?
- A 100-kg man decides to add to his exercise routine by walking up six flights of stairs (30 m) 10 times per da...
- Suppose an Olympic diver who weighs 52.0 kg executes a straight dive from a 10-m platform. At the apex of the...
- Suppose an Olympic diver who weighs 52.0 kg executes a straight dive from a 10-m platform. At the apex of the ...
- (d) What is the kinetic energy of an electron traveling at velocity (c)?
- What must be added to water in order to change state from liquid to a gas?
- What happens to the molecules that make up a chocolate chip as it is heated in the oven?
- The energy stored in the chemical bonds of fossil fuels is a form of __________ energy.
- Which would most likely cause an increase in the energy of water molecules in liquid water?