## AP Physics Resources

I need help with some physics homework. How to find the weight of the air inside a ball?

I know the radius including the outside layer or "shell" of the basketball is 0.1205m and without is 0.1075m. The inflation pressure is 55158.06 N/m2 in Pascals. What is the minimum energy that is required to take a stationary satellite...

What minimum energy is required to take a stationary 600 kg satellite from the surface of the moon to an altitude of 9.2x10^5 and put it into an orbit with an orbital speed of 1.36x10^3 m/s?   The... How do you find the net gravitational force and direction if there are four objects?

Four spheres of equal 8 kg are located at the corners of a square of length 0.64 m per side.   How am I supposed to find the net gravitational force AND direction of one of the objects... Centripetal forces with tilts/banks

A 220000 kg plane flying at 130 m/s tilts 30º above the horizontal to fly in a circle. What is the radius of the circle in which the plane flies? Physics question, its about how much the other side of a mobile is weighting, with the infromation given.

on a 10 meter long, 10k bar of a large calder mobile, hanging from a vertical wire @ the 4 meter position on the bar, is a purple metal star with a mass of 55 kg. Positioned at the 10 meter end. What... How do I solve this AP Chemistry problem on the decomposition of HI(g)?

The activation energy for the decomposition of HI (g) to H2 (g) and I2 (g) is 186 kJ/mol. The rate constant at 555K is 3.52×10^-7 L/mol•s. What is the rate constant at 645K? How do I solve this Chemistry problem on activation energy and calculating the value of k?

The reaction (CH3)3CBr+ OH==>(CH3)3COH+Be   In a certain solvent is first order with respect to (CH3)3CBr and zero order with respect to  OH-. In several experiments,... How do I solve this Chemistry problem on activation energy?

The rate constant  for the gas phase decomposition of N2O5 has the following temperature dependence    T (K)       k (s^-1)        ... How do I solve this AP Chemistry problem?

How do I calculate the activation energy for the reverse of the reaction NO(g) +CO(g) ==>NO(g) CO₂(g), given the activation energy for the forward reaction for the forward reaction is 125kJ/mol... Physics Power and Work

A 49kg bicycle rider delivers an average of 0.28 hp. The mass of the bicycle is 2.1kg and the hill she is climbing is 245m tall. How much time will this take? How do I solve this Chemistry problem on the phase changes of water?

A 20.0-g sample of ice at -10°C is mixed with 100.0 g of water at 80°C. Calculate the final temperature of assuming no heat loss to the surroundings. The heat of capacities of ice and water are 2...