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A ball is thrown straight up by a student at rest on the surface of Earth. A graph of the position y as a function of time t, in seconds, is shown above. Air resistance is negligible. What is the initial speed of the ball?
A 340kg wooden raft floats on a lake. When a 65kg man stands on the raft, it sinks 3.0cm deeper into the water. When he steps off, What is the total energy of vibration
Two people start at the same place and walk around a circular lake in opposite directions. One has an angular speed of 1.70 * 10^-3 rad/s, How long will it be before they meet
What is the force exerted by the scale if the elevator is accelerating downward with an acceleration of 2.6 m/s2. If the elevator's descending speed is measured at 10 m/s at a given point, but its speed is decreasing by 2.6 m/s2, illustrate what is ..
A 1.0- kg mass is attached to a string wrapped around a shaft of negligible mass and having a 5.0- cm radius. How far apart are the masses of the dumbbell
A potential difference of 16.0 V is applied across a wire of cross-sectional area 4.01 mm2 and length 983 km. What type of wire is this
A moving 4.50kg block collides with a horizontal spring whose spring constant is 494 N/m. What is the speed of the block when it hits the spring
An iron bolt of mass 79.0 g hangs from a string 32.4 cm long. The top end of the string is fixed, Find the tension in the string and Find the magnetic force on the bolt
Monochromatic light (Wavelength = 500 nm) passes through two slits and onto a screen 2.5 m away. what is the new distance between bright fringes
150 ml of water at 5.00C is placed in the freezer compartment of a refrigerator with a coefficient of performance of 6.00. How much heat energy is exhausted into the room
A diver springs upward from a board that is 5 meters above the the water. determine her peak height measured above the water
When a diver jumps into a lake, water leaks into the gap region between the diver's skin and her wetsuit, Estimate how much energy (in units of candy bars = 300 kcal) is required by this heating process
A student sits on a rotating stool holding two 2.9-kg objects. When his arms are extended horizontally, the objects are 1.0 m from the axis of rotation and he rotates with an angular speed of 0.75 rad/s, Find the new angular speed of the student
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