What is the maximum acceleration of the needle
A sewing machine needle moves up and down in simple harmonic motion with an amplitude of 1.27 cm and a frequency of 2.55 Hz. What is the maximum acceleration of the needle?
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A 18.0-V battery is connected to a capacitor, resulting in 45.0 µC of charge stored on the capacitor. How much energy is stored in the capacitor?
The masses of the three blocks are m1 = 15 kg, m2 = 27 kg, and m3 = 50 kg. The pulling force is equal to T3 = 18 N. What is the acceleration of the system?
A cube of copper of mass mc = 75g is placed in an oven at a temperature of T = 600? F until it comes to thermal equilibrium. The cube is the dropped into an insulated beaker containing mw = 200g of water. The heat capacity of the beaker alone is
A Carnot engine performs work at the rate of 420 kW while using 690 kcal of heat per second. If the temperature of the heat source is 550°C, at what temperature is the waste heat exhausted?
A rotating cylinder about 24 km in length and 7.0 km in diameter is designed to be used as a space colony. With what angular speed must it rotate so that the residents on it will experience the same acceleration due to gravity on Earth
an object weighs 315 N in air. when tied to a string connected to a balance, and immersed in water, it weighs 265 N. When it is immersed in oil, it weighs 269 N. Find the following:
A barefoot field-goal kicker imparts a speed of 31 m/s to a football initially at rest. The acceleration of gravity is 9.8 m/s2. What is the height of the tower?
A tank having a volume of 0.100 m3 contains helium gas at 140 atm. How many balloons can the tank blow up if each filled balloon is a sphere 0.300 m in diameter at an absolute pressure of 1.10 atm?
A 0.45 kg piece of wood floats in water but is found to sink in alcohol (specific gravity = 0.79) in which it has an apparent mass of 0.034 kg. What is the SG of the wood?
A bat emits a sound whose frequency is 96 kHz. The speed of sound in air at 20.0° C is 343 m/s. However, the air temperature is 35° C, so the speed of sound is not 343 m/s. Assume that air behaves like an ideal gas, and find the wavelength
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