What is the acceleration due to gravity at a location where a 15 kilogram mass weighs 45 newtons?

Protons and neutrons strongly attract when they a. are moving fast. c. are at high energies. b. are very close together. d. have opposite charges. protons and neutrons strongly attract when they: b. are very close together.

Consider six proposed properties of electromagnetic radiation: wave speeds of 3.00*108 km/s3.00*108 km/s and 3.00*108m/s3.00*108m/s, wavelengths of 673 nm673 nm and 0.221 nm0.221 nm, and frequencies of 2.39*1018 Hz2.39*1018 Hz and 4.85*1014 Hz4.

Which of the following are likely to be affected by a magnet? Check all that apply. A. A DVD B. A credit card C. An access card you scan for entry into a building D. A CD

The primary energy source for most communities is sunlight. Producers use sunlight to make carbohydrates. Consumers eat producers and use the carbohydrates for energy. What happens to the energy in a consumer's body when it dies?

How does the Earth's position in Space, mass and atmosphere allow the planet to support life?

Which of the following correctly compares a scientific investigation to a demonstration

You push a 45 kg wooden box across a wooden floor at a constant speed of 1.0 m/s. The coefficient of kinetic friction is 0.25. Now you double the force on the box. How long would it take for the velocity of the crate to double to 2.0 m/s

What is the middle layer of earth called

If 10 calories of energy are added to 2 grams of ice at - 30° C, calculate the final temperature of the ice. (Notice that the specific heat of ice is different from that of water.) T. F = -20° C -30° C 30° C 40° C

Are microwaves and radio waves faster or slower than other types of electromagnetic energy?