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Q. A pendulum is made by tying a 678 g ball to a 53-cm-long string. The pendulum is pulled 49° to one side, then released. What is the ball's speed at the lowest point of its trajectory?
Q. An emf is induced in a conducting loop of wire 1.11m long as its shape is changed from square to circular.Find the average magnitude of the induced emf if the change in shape occurs in 4.03s and the local 0.135-T magnetic field is perpendicular to the plane of the loop.
An air molecule is moving at a speed of 450 m/s. How many meters would the molecule move during 7.00 ms (milliseconds) if it didn't collide with any other molecules.
The ends of two thin glass tubes are stuck in the same pool of water. Although both tubes are thin, one tube has a smaller inside diameter (Tube 1) than the other (Tube 2). Both tubes are made of the same material. Would you expect the level in Tu..
A child goes down a playground slide with an acceleration of 1.20 m/s2. Compute the coefficient of kinetic friction between child and slide if the slide is inclined at an angle of 32.2° below the horizontal.
A car travelling at 120 strikes a tree. The front end of the car compresses and driver comes to rest after travelling 0.900.
An airplane starting from airport A flies 304 km east, then 364 km at 35.5° west of north, and then 150 km north to arrive at last at airport B.
How much is the spring compacted
What could you expect the intrusion into the vechicle is, based on this information? Explain how you arrived at this intrusion.
If you were to use wire of twice the diameter, which of the above answers would change? Would they increase or reduce.
A screen is placed 1.30 {rm m} behind a single slit. The central maximum in the resulting diffraction pattern on the screen is 1.70 {rm cm} wide-that is, two first-order diffraction minima are separated by 1.70 {rm cm}.
A car makes a round trip for 100m in 10 seconds. What is the average velocity?
A 11.0g bullet is fired horizontally into a 103g wooden block that is firstly at rest on a frictionless horizontal surface and connected to a spring of constant 154N/m. The bullet becomes embedded in block. If the bullet-block system compresses the s..
What is the potential energy of the elevator
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