
A spherical shell of radius 15 cm carries 4.8 muC, distributed uniformly over its surface. At the center of the shell is a point charge. If the electric field at the surface of the sphere is 750kN/C and points outward, what is the charge of the point charge? What is the field just inside the...

A 96 g cube of ice at 0 C is dropped into 1.0 kg of water that was originally at 70 C. What is the final temperature of the water after the ice has melted?

A particle with a charge of  3.00 {\rm \mu C} is placed at the point P described in part A. What is the magnitude of the force exerted by the particle on the ring?

A scheme for a modernday Fountain of Youth is introduced by a marketing company. Their idea is to launch their clients on a round trip at relativistic speeds. Their ads proclaim: "After 10 years have elapsed on Earth, you will only have aged 5 years!" Will the passengers enjoy...

Consider a box on a relativistic train car, moving at 0.866c along the positive x axis as viewed from the Earth. The length of the box along the x axis, as measured by Earth observers, will be only half of its proper length. If V is the volume of the box measured by an observer on the train, what...

An interstellar spacecraft races by the Earth at a velocity of 1.85 108 m/s, as measured by observers on the Earth. The spacecraft's galley cook places a pot of Minute rice on the stove for exactly 60.0 s, according to his watch. How long will the pot have been on the stove according to...

What current is required in the windings of a long solenoid that has 950 turns uniformly distributed over a length of 0.380 m in order to produce a magnetic field of magnitude 1.00 104 T at the center of the solenoid? 1 mA

At a distance of 3.0 m from a siren, the sound intensity is 3.6 102 W/m2. Assuming that the siren radiates sound uniformly in all directions, find the total power radiated.

The greenish blue of water is evidence for the

What is the minimum thickness of a soap bubble film (n = 1.46) on which light of wave length 500 nm shines, assuming one observes constructive interference of the reflected light?
Ask a new Physics Question
Tips for asking Questions
 Provide any and all relevant background materials. Attach files if necessary to ensure your tutor has all necessary information to answer your question as completely as possible
 Set a compelling price: While our Tutors are eager to answer your questions, giving them a compelling price incentive speeds up the process by avoiding any unnecessary price negotiations
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?