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Q. A spring (k =805N/m) is hanging from the ceiling of an elevator, and a 5.0-kg object is attached to the lower end. By how much does the spring stretch (relative to its unstrained length) when the elevator is accelerating upward at a = 0.47m/s2?
Q. A sound wave travels twice as far in neon (Ne) as it does in krypton (Kr) in the same time interval. Both Neon and Krypton can be treated as monatomic ideal gases. The atomic mass of Neon is 20.2u, and that of krypton is 83.8u. The temperature of the krypton is 293K. What is the temperature of the neon?
a loaded cart has a total mass of 227kg.if a 312n force acting at an angle of 30degree to the ground is applied. how much work is done in moving the cart 15meters?
what is the magnitude of the net force acting on ball.
The minimum distance required to stop a car moving at 36.0 mi/h is 48 ft. What is the minimum stopping distance for the same car moving at 70.0 mi/h, assuming same rate of acceleration.
At a waterpark, sleds with riders are sent along a slippery,horizontal surface by release of a large, compressed spring.The spring with a force constant k= 3700 N/m and negligible mass rests on the frictionless horizontal surface.
what is the maximum weight of the crate that the system can support? What is the angle needed for equilibrium.
Calculate the gradient of V in each region
The force on a particle is directed along an x axis and given by F = 0.97(x/4.6 - 0.52) where x is in meters and F is in Newtons. Find out the work done by the force in moving the particle from x = 0 to x = 8.9 m.
What is an average velocity of the train throughout run
A current of 10^-14 A is produced in a free-air chamber operating under saturation conditions. The sensitive volume, in which electronic equilibrium exists, contains 0.22g of air. What is the exposure rate .
A 2.30-? F capacitor is fully charged by being connected to a 6.0-V battery. The fully charged capacitor is then connected to a 0.250-H inductor.
You are driving to the grocery store at 20. You are 100 from an intersection when the traffic light turns red. Suppose that your reaction time is 0.70 and that your car brakes with constant acceleration. What acceleration would bring you to rest r..
A gas expands while 502 J of energy is added to it as heat. The expanding gas does 422 J of work on its surroundings.
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