Which best describes a reference frame?

A. a distance over which an object moves

B. the difference between start and end velocity

C. a position from which something is observed

D. the average speed of a group of objects

Which of the following statements is a true statement about the use of nuclear energy as an alternative energy source? A. Production of electricity from nuclear energy does not produce dangerous radioactive waste products. B.

How do a joule a watt and a Newton relate to each other

What is friction. what does friction do as an ice skater slide across the ice?

Which term describes an advantage of wind energy? A. Expensive B. Nonrenewable C. Unreliable D. Abundant

A piston above liquid in a closed container has an area of 1m2. The piston carries a load of 350 kg. What will be the external pressure on the upper surface of the liquid in KPA

The act, process or state of the change in place or position oa a body with respect to time and relative to the observer is said to be : - 1. Rest 2. Stationary 3. Motion 4. None of the above

During a snowball fight two balls with masses of 0.4 kg and 0.6 kg, respectively, are thrown in such a manner that they meet head on and combine to form a single mass of 1 kg. the magnitude of intial velocity foreach is 15 m/s.

Which phases of matter do molecules have the lowest amount of energy?

How many Oxygen (O) atoms are in the following? H2O + CO2 4 3 2

How does surface roughness affect friction