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A football is kicked at ground level with a speed of19.2 m/s at an angle of 34.8 degree to the horizontal. Evaluate how much later does it hit the ground?
A certain electric extension cord has a resistance of 4.96 ?. Suppose it is replaced by an extension cord made of the same material. What is the resistance of the new cord
A dolphin in seawater at a temperature of 25 °C makes a chirp. How much time passes before it hears an echo from the bottom of the ocean, 208 m below.
One of the asteroids, asty, looks like an elongated potato. Surprisingly it has a tiny (compared to asty) spherical moon! Find the escape speed on Dactyl
A car with a mass of 950 kg and an initial speed of v1= 22.4 m/s approaches an intersection. What is the initial speed of the minivan
A spaceship is approaching a space station at a speed of 1.8 multiplied by 105 m/s. The space station has a beacon that emits light by a frequency of 6.3 multiplied by 1014 Hz. Find the change infrequency (the "frequency shift"), Δf, for the light fr..
The internal energy of a gas is 553.J. The gas is compressed adiabatically, and its volume decreases by 105.cm3. what is the internal energy of the gas after the adiabatic compression
What was the speed of the car when the brakes were applied.
A beam of unpolarised light with a power of 70 mW is passed through two polarisers in series, with their polarisation directions parallel to each other. What is the maximum power that can be transmitted through the two
Estimate the pressure exerted on a floor by the following one pointed chair leg (56 kg on all four legs) of area = 0.06 cm2 N/m2
A small, 100g cart is moving at 1.70m/s on an air track when it collides with a larger, 3.00kg cart at rest. what is the speed of the large cart after the collision
he edge of the thimble of a micrometer moves a distance of 2.0 mm when it is given four complete revolutions. calculate the least count of the micrometer
The leg and the cast in Fig 4.20 below weigh 220 N (w1). Determine the weight w2 and the angle α needed so that no force is exerted on the hip joint by the leg plus the cast.
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