If you lift a five pound object 18 inches how many joules of energy did yo use?

What is nanotechnology?

The most practical way to guard against allergic reactions in restaurants guests is to

Occurs when an energy source transfers heat directly to another subject space; an example would be an object becoming warm by sitting in the sunshine

A quarterback throws a football with an initial velocity v at an angle θ above horizontal. Assume the ball leaves the quarterback's hand at ground level and moves without air resistance.

A hockey puck sliding at 60.0m/s slows uniformly to 20.0m/s while travelling 800.0m. a) Determine the acceleration b) Determine the time it took

Which of the following is a way humans have impacted the rainforest, but not the tundra?

Explain what happens when a massive star ends its life as a supernova.

Freckles are a dominant trait in humans. Both of the girls have the genotype FF for freckles. If either one marries a man with no freckles, what are the chances that their children will have freckles? A) 0% B) 50% C) 75% D) 100%

A 3 N force pushes on a object for 20 meters find the work done

As a woman walks, her entire weight is momentarily placed on one heel of her high-heeled shoes. calculate the pressure exerted on the floor by the heel if it has an area of 1.54 cm2 and the woman's mass is 69.5 kg. express the pressure in pascals.