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A piece of a cloth is found to contain 15% of the C-14 present in a similar material today. How old is this cloth? (Remember, T1/2 for C-14 is 5730 years.)
A ship is floating on a lake. Its hold is the interior space beneath its deck; the hold is empty and is open to the atmosphere. What volume of water per second leaks into the ship
If a metal wire carries a current of 23.0 mA, how long does it take for 12.0×1020 electrons to pass a given cross-sectional area anywhere along the wire? The magnitude of the charge on an electron is 1.6 × 10-19 C.
What is the current in the wire.
A 47.3-cm diameter disk rotates with a constant angular acceleration of 2.70 rad/s2. It starts from rest at t = 0, Find the angular speed of the wheel
According to the shop manual, when drilling a 13.0-mm-diameter hole in wood, For a 13.0-mm-diameter drill bit turning at a constant 1400rev/min , find the maximum linear speed of any part of the bit
In a double-slit interference experiment, the wavelength is 577 nm, the slit separation is 0.1 mm, What is the linear distance between adjacent maxima on the screen
A 1.80 kg block slides on a frictionless horizontal surface. The block hits a spring with a speed of 2.00 m/s and compresses it a distance of 11.0 cm before coming to rest. Illustrate what is the force constant of the spring?
A spring-loaded pellet gun is designed to fire 3.50 g projectiles horizontally at a speed of 39.1 m/s. What maximum force is required to load the gun
How far does the object compress the spring if same experiment is performed on the moon, where g = 1.63 m/s2 and air resistance is neglected.
At rest, a car's horn sounds the note A (440 Hz). The horn is sounded while the car is moving down the street. find Is the cyclist ahead of or behind the car
A planet has a mass of 5.69Ã?1026 kg. The planet is not a perfect sphere, instead it is somewhat flattened. What is the escape speed at the poles
A bungee cord is stretched between two poles with a force of 357 N. What is the velocity of a wave on this bungee cord
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