My question is An object may be acted on by several forces. What name is given to the single force that has the same effect as these forces?

Which of the following would require the greatest number of calories? 1. Heating 1 g of water from 10◦C to 80◦C 2. Heating 10 g of water from 10◦C to 40◦C 3. Heating 1000 g of water from 10◦C to 12◦C 4. Heating 100 g of water from 10◦C to 50◦C

A rock is suspended by a light string. When the rock is in air, the tension in the string is 39.2 N. When the rock is totally immersed in water, the tension is 28.4 N. When the rock is totally immersed in an unknown liquid, the tension is 18.6 N.

A car travels 60 m/s for 10 seconds Calculate how far it traveled.

Which best describes why a diamond ring will sometimes sparkle different colors in normal white light? absorption interference refraction destruction

Predict which will fall to the ground faster a crumpled paper or flat sheet of paper

a minibus drives 238 miles with a constant speed of 84 mph and another 80 miles with a constant speed of 60 mph. how much time in total does it take to travel these distance?

If the volume of a container increases, then the pressure will: A. first increase and then decrease. B. increase. C. stay the same. D. decrease.

How does the theory of natural selection explain the diversity of life?

What law states that when matter undergoes a physical or chemical change, no atoms are created or destroyed?

Which statement would be a valid argument in favor of using nuclear power? There are few negative impacts from mining the fuel. Reactors are safe from natural disasters. There are little to no waste products from fission.