An element's atomic number is 45. How many protons would an atom of this element have?

How much time is needed for a 15,000 W engine to do 1,800,000 J of work? (Power: P = W/t) A. 0.008 s B. 8 s C. 120 s D. 1,785,000 s

You are called to the crime scene immediately and you begin your investigation at 2 PM. The first thing you do is take the temperature of the body it is 84.4°F.

Real life phenomenon of atomic physics

Which factors improve soil fertility? Select the three correct answers. A. Artificial fertilizer B. High pH C. Water D. Bedrock E. Nitrogen-fixing bacteria

What is the unit for magnitudes in astronomy?

A wave has a wavelength of 7 mm and a frequency of 9 hertz. What is its speed?

Which statement best describes the effect of scientific advances on society? A. They always have a positive impact on society. B. They are inspired by the needs of society. C. they do not affect society beyond the community level. D.

Which is the best example of reusing? repairing a stove instead of buying a new one wearing a pair of pants made from cotton buying a toy packaged in paper instead of plastic placing a glass bottle in the recycling bin

The sunlight hits the surface of a lake this will like caused a. condensation b. transpiration c. evaporation d. sublimation

The development of the cell theory was mostly directly related to the