Which products do you think required scientific knowledge to develop? Check all that apply.

_ a flashlight

_ a cell phone

_ a hair dryer

_ eyeglasses

_ a microwave

_ a household cleaner

What happens to the atoms in a liquid as it freezes

The floor of a railroad flatcar is loaded with loose crates having a coefficient of static friction of 0.320 with the floor. If the train is initially moving at a speed of 49.

Which of the following is not the way heat would flow? from ice to water from fire to water from your body to ice from boiling water to you

How much power is expended on a 20-N rock that you lift 1.5 meters up in 10 seconds? A. 3 Joules B. 30 Joules C. 3 Watts D. 30 Watts

Tom has a mass of 73. 9 kg and Sally has a mass of 59. 8 kg. Tom and Sally are standing 27. 9 m apart on a massless dance floor. Sally looks up and she sees Tom. She feels an attraction. If the attraction is gravitation, find its mag - nitude.

If it has enough kinetic energy, a moleculeat the surface of the Earth can escape the Earth's gravitation. The acceleration of gravity is 9.8 m/s2, and the Boltzmanns' constant is 1.38066*10-23 J/K.

True or False. Alcohol is toxic to most fruit flies, but fruit flies that metabolize alcohol quickly survive alcohol exposure better than normal metabolizers.

Aerobic exercise is exercise where oxygen is not present. Question options: True False

The force between a pair of. 005 charges is 750 N. What is the distance between them?

A perpetual motion machine can never be built because it is not possible to eliminate A) Momentum B) Inertia C) Elasticity D) Friction