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Weight is a measure of                                                   .
2. the gravitational attraction between you and Earth
3. mechanical equilibrium
4. all of these
5. none of these
A force applied to a body is said to do "work"                                                                        .
1. if the body is displaced in the direction of the applied force
2. if the body is displaced in the direction opposite to the applied force
3. even if the body does not move
4. only when the body is moving
According to second law of thermodynamics, heat energy cannot be completely converted into useful work owing to                                       .
1. the entropy of the system
2. the enthalpy of the system
3. the internal energy of the system
4. the translational energy of the system
Which type of energy is released when an ionic solid is dissolved in water?
1. Hydration energy
2. Solvation energy
3. Lattice energy
4. Crystal energy
The amount of charge that builds up due to the friction between two materials depends on the                                         .
1. weight of the materials
2. surface area in contact
3. electrical conductivity of the materials
4. lattice structures of the materials

This question is a part of a group with common instructions. View group »

What is the definition for the term "vector"?
1. a quantity having direction as well as magnitude, especially as determining the position of one point in space relative to another
2. the total displacement (Δd), change in position , divided by the total time for that displacement.
3. they can provide tons of information of an objects motion in graph
4. A and C
According to Newton’s laws of motion, an object set in motion remains in motion unless a force acts on it. If you suspend an object from a string and make it swing, the object will swing for a while, then slow down and stop. Why does the suspended object stop swinging?
1. It is because an object at rest remains at rest unless a force acts upon it.
2. It is because the mass of the object is too small to maintain the motion.
3. It is because energy is the ability to do work.
4. It is because gravity is pulling it toward the Earth.
5. It is because energy of motion is converted to heat through friction with air.