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1-A box of mass 1.0 kg sits atop a frictionless surface inclined at 30 degree above the horizontal. It is connected on its left side by a massless cord to a box of mass 3.0 kg on a horizontal frictionless surface through a massless and frictionless pulley. A horizontal force of 2.3 N is applied to the 3.0 kg box in the positive direction.
What is the tension of the cord?
Ice of mass 49.5 g at -9.9° C is added to 202 g of water at 13.9° C in a 94 g glass container of specific heat 0.200cal/g-°C at an initial temperature of 24.7° C. Discover the final temperature of the system.
A bullet with mass 12.5 g and speed 94.9 m/s is fired into a wooden block with a mass of 113 g which is initially at rest on a horizontal surface. What is the speed of the block-bullet system immediately after collision
two coaxial cylindrical conductors . the inner cylinder has radius a 2 cm length 10 m and caries a total charge of
A child is sitting on the outer edge of a merry-go-round that is 18 m in diameter. If the merry-go-round makes 8.4 rev/min, what is the velocity of the child in m/s
a man can throw a ball a maximum horizontal distance of 142 m. the acceleration of gravity is 9.8 ms2 . how far can he
As the drawing shows, two thin strips of metal are bolted together at one end and have the same temperature. One is steel, and theother is aluminum. The steel strip is 0.10% longer than thealuminum strip. By how much should the temperature of the str..
You slide a crate up a ramp at an angle of 30.0° by exerting a 225-N force parallel to the ramp. The crate moves at constant speed. The coefficient of friction is 0.28. How much works have you done on the crate when it is raised a vertical distance o..
A Martian leaves Mars in a spaceship that is heading to Venus. On the way, the spaceship passes earth by a speed v = 0.86c relative to it. Suppose that the three planets do not move relative to each other through the trip. The distance among Mars and..
Three resistors, 25, 45, and 75 Ohms, are connected in series, and a 0.51-A current passes through them. What is (a) the equivalent resistance and (b) the potential difference across the three resistors?
A wire carrying a 2A current is placed at an angle of 60 degrees with the respect to a magnetic field of strength 0.2T. obtain the magnitude of the magnetic force acting on the wire
What does the ammeter read? What does the voltmeter read?
1. A 50.0 kg block is pulled from rest by a force of 1000.0 N at an angle of 37.0° across a horizontal rough surface over a distance of 5.60 m. The coefficient of kinetic friction between the block and the surface is 0.500.
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