
The coefficients of static and kinetic frictions for plastic on wood are 0.50 and 0.40, respectively. How much horizontal force would you need to apply to a 3.0 N plastic calculator to start it moving from rest?

Liboff problem 11.64 Liboff problem 11.67 Liboff problem 11.68 (a to e)

In the figure below, a slide loving pig slides down a certain 36 slide in twice the time it would take to slide down a frictionless 36 slide. What is the coefficient of kinetic friction between the pig and the slide?

A 6 g object going 90.0 cm/s at time zero has a constant acceleration of 25 cm/s 2. How far did the object travel in the six seconds

A friend of yours is loudly singing a single note at 410 Hz while racing toward you at 26.1 m/s on a day when the speed of sound is 339 m/s. What frequency does your friend hear if you suddenly start singing at 410 Hz?

A uniform electric field E = 2800 V/m exists within a certain region. What volume of space contains an energy equal to 1.05 multiplied by 107 J? Express your answer in cubic meters and in liters.

A dock worker applies a constant horizontal force of 79.0 {\rm N} to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves 14.0 {\rm m} in the first 6.00 {\rm s}.What is the mass of the block of ice?

Two particles of charge Q(L,0) and nQ( L,0) where n = 10. When a third charge is placed at the origin, it is found that the force on it is zero. Find .

Two forces FA and FB are applied to an object whose mass is 16.7 kg. The larger force is FA. When both forces point due east, the object's acceleration has a magnitude of 0.859 m/s2. However, when FA points due east and FB points due west, the acceleration is 0.500 m/s2, due east. Find (a)...

How fast (in rpm) must a centrifuge rotate if a particle 6.5 from the axis of rotation is to experience an acceleration of 125,000 g's? Express your answer using two significant figures.
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Sample Questions
 The Earth’s rate of rotation is constantly decreasing, causing the day to increase in duration. In the year 2000 the Earth takes about 0.548 s longer to complete 365 revolutions than it did in the year 1900.
 (a) What is the average angular acceleration of the Earth?
 (b) If this average acceleration remains constant, in what year will the Earths rotation come to rest?
1. Can you show me step by step how to solve this problem?:
 A spherical balloon is made from a material whose mass is 3.00kg. The thickness of the material is negligible compared to the 1.5m radius of the balloon. The balloon is filled with helium (He) at a temperature of 305degrees K and just floats in the air, neither rising nor falling. The density of the surrounding air is 1.19kg/m^3. Find the absolute pressure of the helium gas
2. I do not understand this Ideal Gas Law and Kinetic Theory question. Can you help me set it up?