Ideal Gas Law

A cubic box of volume 3.9*10^-2 m^3 is filled with air at atmospheric pressure at 20C. The box is closed and heated to 180C. What is the net force on each side of the box?

coefficient of static friction

Force of static friction between any two surfaces is given by: Ff=Us*N How do you find the mass of the coin(m), gravity(g) (9.8m/sec2) and the angle (30) the flat surface makes with the table; Ff=m.g.sin0 and N=m.g.cos0 using the above expressions of Ff and N and the definition of the force of static fricition,show that the co ...continues

Acceleration due to gravity

It's your lucky day! You have been chosen by NASA to be the astronaut for its first intergalactic expedition. In your excitement fo rthe mission, however, you forgot to read the road map and you have no idea where your spacecraft landed. Your intimate knowledge of physics will save the day since you have a detailed database of ...continues

Average Power fun

Scott, riding for the Mercury team, won the 2002 Mt. Rushmore Hill Climb bicycle race with a winning time of 1hr 50minutes 20seconds. The race is 28 miles in length with a total altitude gain of 7000ft. Scott weighs in at 130lbs and his hill climbing bike weighs 17 lbs. The total weight of his water bottles, shoes, clothing, ...continues

I tried to apply the formula but it seems not right

1. A scuba tank has a volume of 3500 cm³. The tank is filled with 50% (by volume) pure oxygen and 50% (by volume) pure helium. (a) How many molecules are there of each type in tank if it is filled at 20ºC to an absolute pressure of 11 atmospheres? (b) What is the ratio of the average translational kinetic energies of the ...continues

An ideal gas at STP (1 atm and 0°C) is taken through a process where the volume is expanded from 25 L to 50 L. During this process the pressure varies inversely as the volume squared, so that P = 0.2 alpha/V^2

An ideal gas at STP (1 atm and 0°C) is taken through a process where the volume is expanded from 25 L to 50 L. During this process the pressure varies inversely as the volume squared, so that P = 0.2 alpha/V^2 (a) Determine the constant alpha in standard SI units. (b) Calculate the number of moles of gas present. (c) Fi ...continues

Simple Acceleration

Car A is at rest (0 mi/hr), while car B is going 90mi/hr with constant acceleration. How fast will car A have to travel from rest in order to catch up to car B over a distance of 3 miles? How long will it take for car A to catch car B?

Please, find the anwer and show me how you got it if you can

1>What is the electric potential at a point 0.45 m away from a point charge of a of 2.5mC 2> If 3.75 X 10^-4 J of work are required to move 13.7 microc of charge from one point to another, what is the electric potentail difference the two points. 3> An electron is released from rest in a vacumm between two flat, parallel ...continues

Physics Problems

Hi, I am having trouble doing these problems listed below. Please show me how to solve these problems for future reference. Thank you very much. Note: I put the answers below the questions in bold so you can check your answers. I would like for you to show me all of your work/calculations and the correct answer to each probl ...continues

Please, show me how you got the answer and need to know the answer. Thanks

1. When a charge of 180 microC is applied to the plates of a capacitor, the potential difference between the plates is 15 V. What is the capacitance? 2. How much charge is stored on each plate of a 5000 MicroF capacitor whose plates are held at a potential difference of 350 V? 3.Calculate the capacitance of two flat metal ...continues