197 Answered Questions for the topic AP physics

08/15/19

How to solve for a in yf=yi+vi *t + 1/2*at^2. Also, What’s this formulas name

Step by step please. This one is hard to get

08/15/19

In snell´s law, find θ2 in n1sinθ1=n2sinθ2

Step by step please. I dont seem to understand it

08/10/19

Kinematics Chapter Questions

A train travels from Boston to New York. It travels at a speed of 180 km/h for two hours, speeds up to 200 km/h for the next four hours and then slows down to 120 km/h for the next six hours. What... more

08/10/19

Kinematics Chapter Questions

A train travels from Boston to New York. It travels at a speed of 180 km/h for two hours, speeds up to 200 km/h for the next four hours and then slows down to 120 km/h for the next six hours. What... more

05/13/19

AP Physics 1 question

A high-speed lifting mechanism supports an 800-kg object with a steel cable that is 25.0m long and 4.00cm^2 in cross-sectional areaa)Determine the elongation of the cableb)By what additional amount... more

04/11/19

AP Physics Free Response Question

A simple pendulum consists of mass m attached to a massless string. When the mass is displaced slightly from equilibrium position and released, the period swings back and forth with a frequency f.... more

04/11/19

Electrostatic Physics Problem, Can't Figure Out The Direction Of The Resultant Force?

The Question says: A charge Q1 = -16 x 10 -6 coulomb is fixed on the x-axis at +4.0 m and a charge of Q2 = +9.0 x 10 -6 coulomb is fixed on the y-axis at +3.0 meters as shown above. A charge of Q3... more

10/25/18

AP Physics Projectile motion?

Im currently on a WebAssign for my AP Physics Class and this problem has been a real pain. Here's the scenario:A projectile is shot from the edge of a cliff h = 285 m above ground level with an... more

09/17/18

Relating electric field to electric potential

Two equal positive charges are separated by a distance R and are moved to a distance 4R away from each other. What happens to the electric field and electric potential at point P, midway between... more

08/24/18

Is this equation dimensionally correct?

 Is the equation v2/a dimensionally correct?

06/03/18

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. 

04/26/18

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... more

04/13/18

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? Do I use... more

03/23/18

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?

03/13/18

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.... more

02/09/18

How do I solve this AP Chemistry problem on catalysts?

 A famous chemical demonstration is the "magic genie" procedure, in which hydrogen peroxide decomposes to water and oxygen gas with the aid of a catalyst. The activation energy of this... more

02/07/18

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?

02/07/18

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, the rate constant k was... more

02/07/18

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)               4.9×10^-3 338.        5.0×10-4 318         ... more

02/07/18

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... more

01/18/18

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?

01/15/18

How do I solve this problem on the critical point of NH3?

The critical point of NH3 is 132°C and 111 atm and the critical point of N2 is -147°C and 34 atm. Which of these substances cannot be liquefied at room temperature no matter how much pressure is... more

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