A sphere has a charge of + 12µC. How many electrons were removed from the sphere?

a. 7.5 X 1013

b. 7.5 X 1019

c. 4.8 X 1025

d. 12 x 10-6

A cylinder with a piston contains 0.8 kg of water at 100 degrees C. What is the change in internal energy of the water when it is converted to steam at 100 degrees C at a constant pressure of 1 atm?

While ice skating, Tabitha pushes against the wall to stretch her leg. What is the reaction force?

Based on the field lines, what are the charges of the objects? X: positive Y: negative X: negative Y: positive X: negative Y: negative X: positive Y: positive

true or false: an oxygen atom can absorb any frequency of light to cause it's electrons to increase in energy

Which of the following is a subsurface event that takes place during the rock cycle? A. Deposition B. Erosion C. Weathering D. Plate tectonics

Which are the most common producers in aquatic ecosystems? a - bacteria b - algae c - fish d - plants

You push a piano 5 meters across the floor with a force of 400 n. how much work have you done?

Monochromatic electromagnetic radiation illuminates an area of a surface. The electric and magnetic fields of the waves are then doubled in magnitude.

The measure of the force of gravity on an object, expressed as mass of the object times acceleration due to gravity is called

Which of the following jobs does not require good swimming ability