If an element with an atomic number of 51 and an atomic mass of 121, how many neutrons does it have?

3. Which form of radiation is used to kill microorganisms? a. microwaves b. visible light c. infrared rays d. ultraviolet rays

A stone is dropped from a bridge and hits the pavement below in 2 seconds. what is the velocity of the stone when it hits the pavement

Tp-15 water current has the greatest effect on which type of boat?

Distinguished scholars are usually attracted to teaching at a

The slope of the line on distanc-time graph is A. Distance B. Time C. Speed D. Displacement

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