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Here are two Physical Science problems. I just need to know how to solve them. I only have $13 credit and I'll pay it for these two problems. Please help me.
1. A man pulls a 14-kg sled 44 meters along an angled hill with a force of 95 N, which elevates the man 30 meters above the bottom of the hill. The man then hops on his sled and slides to the bottom of the hill back along his 44 meter path, during which a 296 N frictional force acts upon his sled. How much work in Joules does the man do against friction in pulling the sled up the hill?
2. A motor spins a disk (Inertia of the disk=25.5 kg*m^2) with a torque of 39 N*m, and a 18 N frictional force acts on the disk at a radius of 1.4 m. Attached to the disk at a radius of 6.6 m is a 13 kg mass. What is the magnitude of the angular acceleration in rad/s^2 of the system?
A diverging lens with a focal length of -14 cm is placed 10 cm to the right of a converging lens with a focal length of 18 cm. Where will the final image be located
water in a rotating container of radius 50 mm is 30 mm lower in the center than it is on the edge. Find the angular velocity of the container
A metal rod 6.00 m long is held in a horizontal position. what is the torque exerted on the rod by the tension in the rope
The same potential difference is applied across two wires. wire A carries half the current of wire B. If the resistance of wire B is r, what is the resistance of wire A
A block of mass 0.35 kg oscillates in SHM on a spring with an amplitude of 0.96 m. The maximum acceleration of the block is 2.7 m/s2. What is the total energy of the system?
Explain how you would show each of the following in a report: The results of a t test with 38 degrees of freedom, where the obtained value of t was 1.38, and the significance level was p The proper placement of a figure within the text. The proper pl..
A 1.90 kilogram ball is attached to the bottom end of a length of fish line with a breaking strength of 8 lb (35.6 N). Determine at what angle θ (measured from the vertical) will the fish line break
A girl and her bicycle have a total mass of 35 kg. At the top of a hill her speed is5 m/s. what is her speed at the bottom
A reflecting telescope has a main mirror with fM = 620 mm. If an eyepiece with a magnification of 15 is used, what is the total magnification of the telescope
A dam holds back water. In the dam is a turbine that produces power with an efficiency of 0.73. what is the velocity of the water leaving the turbine
An object 40.0 cm in front ofa certain lens is imaged 9.55 cmin front of that lens (on the same side as the object), I got this part. If the image were located, instead,53.0 cm in front ofthe lens, what type of lens would it be? converging lens, but ..
A turntable accelerates from rest up to 75rpm in 11s. What is the average angular acceleration? How many revolutions did the turntable make during that 30s?
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