Two balloons have a negative charge. What happened when they are bought near each other?

Define thermal conduction.

A series circuit contains a 30 Ω resistor, a 20 Ω resistor, and a 10 Ω resistor. The power supply provides 100 V to the circuit. The current in the 10 Ω resistor, to two significant figures, is ___A.

What exposure indicator number would be generated if 1 mR exposed a Carestream imaging plate?

A 10-newton box rests on a table. What is the net force on the box? A. 0 N B. 10 N C. more than 10 N D. between 0 N and 10 N

When a cube of ice floats on water and it melts what will be the level of water after melting? Will it remain the same? increase? decrease? increase and then decrease?

An anion is an atom that has lost electrons. True or False?

Question: Jane, looking for Tarzan, is running at top speed (4.5 m/s) and grabs a vine hanging vertically from a tall tree in the jungle.

Kim holds a pinwheel in the air and says it can be used to model a source of energy. Identify the type of energy Kim's pinwheel models. Explain the type of energy source used.

An example of a stable system

What causes chemical weathering? a. damage caused by animals and plants c. natural acids b. ice wedging d. physical factors