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Nowhere in this activity is there a mention of kinetic energy--energy of motion (KE). A little study of energy conservation tells us that the gain in KE of the ball as it rolls down the ramp is equal to the decrease in PE as the ball loses height-in short, APE = AKE. Why were we able to bypass KE in our analysis here?
A photon with energy E collides with a stationary mass m. What is the mass and speed of this particle
A scuba diver at a depth of 42.0 m below the surface of the sea off shores of Panama City, where the temperature is 7 °C, releases an air bubble with volume 18 cm3.
Two protons are moving directly toward one another. When they are very far apart, What is the distance of closest approach?
A thin film of oil (n = 1.30) is located on smooth, wet pavement. When viewed perpendicular to the pavement, How thick is the oil film
A hydraulic jack has an input piston area of 4.5 cm^2 and an output piston area of 21 cm^2. what force must be applied to the input piston in order to raise a load of 850 N
How numerous forces act on the brick
The rope is initially swung around the axis, causing the wood to have a tangential velocity of 4.0 m/s. After one revolution the wood is observed to have a speed of only 2.1 m/s.
A paperweight, when weighed in air, has a weight of W = 6.6 N. When completely immersed in water, Find the volume of the paperweight
A particle undergoes a displacement Δr of magnitude 57 m in a direction 25° below the x axis. Express Δr in terms of the unit vectors x and y.
A projectile is launched at an angle of 45° above the horizontal. What is the ratio of its horizontal range to its maximum height
Two cars with equal mass collide head on. One car is going 18 mph. That car is push backward about 38 feet. What is the speed of other vehicle.
The resistance of a copper wire of length L meter is 0.1 ohms. If the diameter of the wire is 0.045cm, find out its specific resistance.
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