Suppose Galileo dropped a lead ball (100 kilograms) and a glass ball (1 kilogram) from the leading tower of pisa. Which one hit the ground first?

In digestion the molecules in your food break down to simpler chemical substances releasing energy as they do so this is a physical change true or false

Suppose that you find in a reference book that the volume of all the oceans is 1.4*109km3. To find the mass, you can use the density of water, also found in this reference book, but first you must convert the volume to cubic meters.

If a machines maximum power rating is 200 watts, what is the fastest time for it to do 1,000J of work?

Imagine you poor some hot soup into a bowl. You place your hands on the outside of the bowl and feel that the bowl is very warm. How did that heat get from the soup bowl through your hands? A Osmosis B Radiation C Conduction D Convection

A 15 kg tv sots on a shelf at a height of 0.3 m. how much gravitational potential energy is added to the television when it is lifted to a shelf of height 1.0 m?

a subsrance has an atomic number of 80. How many protons and electrons do atoms of the substance have? what is the subsance?

Ideal meters problem. What internal resistance is ideal for a voltmeter? What internal resistance is ideal for an ammeter?

numerical question : what is the required heat to raise the temperature of 2 kg parrafin by 10 Celsius if 44000 joules is required to raise it by 200 celsius

Psychologists avoid studying emotions because they have little impact on behavior T F

Sheila lives in the seashore community of Beachview. At 6:00 a. m. one morning, she noticed that the local ocean water was at high tide. At approximately noon that same day, she noticed the water was at low tide.