A 5 g pecan hangs at the top of a very old pecan tree. The pecan has a gravitational potential energy of 1.1 J. How tall is the tree?

Suppose the gravitational force between two masses is 70 n. if the magnitude of one of the masses halves, what is the force between the masses?

Which observation could lead to the conclusion that an object is non-living?

Suppose you sketch a model of an atom using the ones here as a guide. How would you build a model that is ionized? How would you build a model that is radioactive?

An object's inertia causes it to come to a rest position. True or false

A crate with a mass of m = 130 kg rests on the horizontal deck of a ship. The coefficient of static friction between the crate and the deck is As-0.86. The coefficient of kinetic friction is μk-0.41. Randomized Variables m 130 kg μ,-0.86 Pk=0.

A particular motor can provide a maximum torque of 110 n • m. assuming that all of this torque is used to accelerate a solid, uniform, cylindrical flywheel of mass 10.0 kg and radius 3.

Round your answers to one decimal place. This parallel circuit has two resistors at 15 and 40 ohms. What is the total resistance? Ω If there is a 12 V battery in the circuit, what would the approximate current be? A

Energy transfer by convection is usually restricted to what type of substance?

Choose all that represent ways that Venus is different than Earth. a. The atmosphere of Earth is thicker than Venus b. Only Earth's atmosphere traps heat c. The atmosphere of Venus is thicker than Earth's. d.

calculate the force exerted on a rocket given that the propelling gases are expelled at a rate of 1500 kg/s with a speed of 4.0x10^4 (at the moment of take off)