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A planet of mass m = 7.85 × 1024 kg is orbiting in a circular path a star of mass M = 4.35 × 1029 kg. The radius of the orbit is R = 8.15 × 107 km. What is the orbital period (in earth days) of the planet Tplanet?
A 9 V battery is rated at 80 Ah. It can deliver a current of 80 A for one hour, or a current of 40 A for 2 hours, etc. What is the total energy stored in the battery
A pitcher throws a baseball vertically upward with an initial speed of 15.0 m/s, releasing the ball when it is 2.00 above the ground, How long is the ball in the air
The top of the hill is horizontal and 70 m higher than its base. What minimum speed must the block have at the base of the hill in order for it to pass over the pit at the far side of the hill
Water flows though a 20mm diameter pipe at 3L/min and static pressure of 100mmHG. What is the wall stress of the pipe. The pipe is 1.5mm thick
The sun is 1.5 1011 m from the earth. What is the total power radiated by the sun and Over what surface area is solar radiation spread at this distance
Carry out the following arithmetic operations: (a) sum of the measured values 756, 37.2, 0.83 and 2.5. The answer must be in significant digits. Since 2.5 and 0.83 have two significant digits, shouldn't the answer be 800 instead of 797.
The planes of atoms in a cubic crystal lie parallel to the surface, 0.74 nm apart. X rays having wavelength 0.40 nm are directed at an angle theta to the surface.
How much work is done on the car by the engine when accelerating the car from rest to 90m/s, What is the average power delivered by the engine
If 100,000 MHz radar waves are incident on a plane coated with a polymer whose index of refraction is n = 1.50, how thick would you make the coating
charge moving perpendicularly to an electric. an electron has a kinetic energy equal to 2e-16 j moves horizontally into a uniform field. find the force of the electron between the plates and acceleration
a steel oil pipeline spans a river gorge 100 m wide. the inside wall is electrically heated to reduce the viscosity of the oil to ease pumping, determine the heat lost per day for the pipe in calories
A ray of light strikes a flat, 2.00-cm-thick block of glass (n = 1.54) at an angle of ? = 29.2° with respect to the normal (see figure below). Find the angle of refraction at the top surface. Find the angle of incidence at the bottom surface and the..
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