Which one of the following is the weakest electrical conductor?

A. a sheet of aluminum foil

B. a cup of orange juice

C. a metal lunchbox

D. a rubber ball

What is reproduce sexually

A heat pump absorbs heat from the atmosphere at a rate of 30 kW. If work is being done to run this heat pump at a rate of 7.7 kW, what is the coefficient of performance (COP) of the heat pump? A) 2.9B) 22C) 0.26D) 3.9E) 4.9

If the mass of two objects increases, the force of gravity between them increases decreases remains the same could increase or decrease, depending on the shape of the objects

What is nuclear energy? A. Stored energy due to an object's location or position O. B. Energy carried by moving electrons O C. Energy due to an object's motion O D. Energy released from atoms

Newton concluded that some force had to act on the moon because

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