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Q. A light spring with a spring constant of 80.0 N/m rests vertically on a table. A 2.00 g balloon is filled with helium (0°C and 1 atm pressure) to a volume of 5.00 m3 and connected to the spring, causing the spring to stretch and expand. How much does the spring stretch when the balloon-and-spring system is in equilibrium? (The density of helium is 0.179 kg/m3)
Q. How much internal energy is generated when a 30.0-g lead bullet, traveling at 6.00 102 m/s, comes to a stop as it strikes a metal plate?
A floodlight with a mass of 46.00 kg is used to clarify the parking lot in front of a library. The floodlight is supported at the end of horizontal beam that is hinged to a vertical pole. A cable that makes an angle of 29 degrees with the beam is att..
A 25- sample of an ideal gas with is at 250 and 50. The gas is compressed isothermally to one-third of its original volume, then heated at constant volume until its state lies on the adiabatic curve that passes through its original state, and then al..
A coin rests 14.60 cm from the center of turntable. The coefficient of static friction between the coin and turntable surface is 0.350. The turntable starts from rest at t = 0 and rotates with the constant angular acceleration of 0.8400 rad/s2.
What is a vertical velocity of the ball
W hat least energy an incident alpha particle must have to penetrate the gold nucleus. What is the direction of the carbon atom after the collision.
A spaceship moves past you at speed v. You calculate the ship to be 364 m long, whereas an astronaut on the ship measures a length of 420 m. Find v.
What angle does water surface make with the horizontal
The minimum stopping distance for a car travelling at a speed of 30 {rm m/s} is 60 {rm m}, including the distance travelled during the driver's reaction time of 0.54 {rm s}.
Two point charges, Q_1 = -6.1 mu C and Q_2 = 2.0 mu C, are situated between two oppositely charged parallel plates. The two charges are separated by a distance of x = 0.30 m. suppose that the electric field produced by the charged plates is unifor..
A stretched rubber band has the length of 0.04 m and a fundamental frequency of 462 Hz. What is the speed at which waves travel on the rubber band.
The density of free electrons in gold is 5.90 x 10^28 m-3. The resistivity of gold is 2.44 x 10-8 at a temperature of and the temperature coefficient of resistivity is 0.004 ()-1. A gold wire, 1.30mm in diameter and 27cm long, carries a current of..
When a train's velocity is 12{rm{ m/s}} eastward, raindrops that are falling vertically with respect to the earth make traces that are inclined 30.0 ^circ to vertical on windows of the train.
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