A 60 kg skydiver moving at terminal speed falls 50m in 1 s. What power is the skydiver expending on the air?
how long does it take for the sun to appear to move its own diameter across the sky
In bomb calorimeter, when dry ice is added to warm water, the final mass of the inner cup and remaining water is less than the initial mass of the inner cup and water. Give an explaination.
how does the density of water chang from 0 degree celsius to 30 degrees celsius?
For research purposes a sonic buoy is tethered to the ocean floor and emits an infrasonic pulse of sound. The period of this sound is 77 ms. Determine the wavelength of the sound. (See Table 16.1 for appropriate constants.
A cord is wrapped around a pulley of mass m and radius r. The free end of the cord is connected to a block of mass M. The block starts from rest and then slides down an incline that makes an angle ! with the horizontal. The coefficient of kinetic friction between block and incline is 7. (a)...
find electric dipole moment of a system which made by superposition of two equal and opposite spherical charge disribution as a cosine function.the centres of the two superimposed sphers are seperated by a small distance.
how to use trigonometry to solve difficult free body diagrams?
A neutral electroscope is charged by induction with a positively charged object. If 3.43 108 electrons flow through the ground wire to Earth and the ground wire is then removed, what is the net charge on the electroscope? Wouldn't the electrons from the earth be attracted to the...
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1. Can you show me step by step how to solve this problem?:
- 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?
2. I do not understand this Ideal Gas Law and Kinetic Theory question. Can you help me set it up?
- A spherical balloon is made from a material whose mass is 3.00-kg. The thickness of the material is negligible compared to the 1.5-m radius of the balloon. The balloon is filled with helium (He) at a temperature of 305-degrees K and just floats in the air, neither rising nor falling. The density of the surrounding air is 1.19-kg/m^3. Find the absolute pressure of the helium gas