A hiker climbs a hill. How does the potential energy of the hiker change as she climbs higher? A
Her potential energy decreases because her height above the ground increases.
B

Her potential energy decreases because her speed increases.
C
Her potential energy increases because her height above the ground increases.
D
Her potential energy increases because her speed increases.

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?

Calculate the estimated density of each ball. use the formula d = m/v where d is the density, m is the mass, and v is the volume. record your calculations in table a of your student guide. given that the density of water is 1.0 g/cm3, make a prediction about whether each ball will float in water. record your prediction in table a. what is the estimated density of the table tennis ball? record your answer to the nearest hundredth