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Q. A binary system consists of two stars that revolve in a circular orbit about a center of mass midway between them. This means that the masses of two stars are equal. Suppose the orbital speed of each star is 285 km/s and the orbital period of each is 16.50 days.
Find out the mass M of each star.
Q. What is the necessary resistance of an immersion heater that would increase the temperature of 1.50kg of water from 10°C to 50°C in 6 min even as operating at 120 V?
A 0.157kg ball is thrown straight up from 1.94m above the ground. Its initial vertical speed is 9.60 m/s. A short time later, it hits the ground. What is the total work done by the force of gravity during that time.
Assume that the net horizontal force is due to rolling friction only and take free-fall acceleration to be = 9.80 .What is the coefficient of rolling friction for the tire under low pressure.
What is the direction of the object's acceleration after it is free. What is the magnitude of the objects acceleration.
A steel aircraft carrier is 385 m long when moving through the icy North Atlantic at a temperature of 1.65°C. By how much does the carrier lengthen whereas it is travelling in the warm Mediterranean Sea at the temperature of 23.30°C.
A coin with a diameter of 3.00 cm rolls up a 30.0 degree inclined plane. The coin starts with the initial angular speed of 60.0 rad/s and rolls in a straight line without slipping. How far does it roll up the inclined plane.
A train is travelling up a 4.8^circ incline at a speed of 3.25m/s while the last car breaks free and begins to coast without friction.
A sanding disk with rotational inertia 5.4 x 10-3 kg·m2 is linked to an electric drill whose motor delivers a torque of magnitude 10 N·m about the central axis of the disk. About that axis and with torque applied for 72 ms, what is the magnitude o..
Two unequal point charges q1 and q2 are held in place unconnected from each other. A point charge Q is placed somewhere between them at a point where it remains stationary when free. From this observation, we can conclude that q1 and q2 must eithe..
A little cat, Bella, walks in a straight line, which we shall call the x axis, with positive direction to the right. As an observant scientist, you make measurements of her motion and construct a graph of the little feline's velocity as a function..
If the Hawaiian hot spot is a fixed hot spot, which of directions is closest to the direction that the Pacific Plate was apparently moving as the Emperor Seamount Chain formed.
A particle of mass M decays into two identical particles each of mass m, where m = 0.4M. Prior to the decay, the particle of mass M has a total energy of 4 Mc2 in the laboratory reference frame. The velocities of decay product are along the directi..
What are direction and magnitude of total velocity
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