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A person who weighs 653 N steps onto a spring scale in the bathroom, and the spring compresses by 0.788 cm. (a) What is the spring constant? (b) What is the weight of another person who compresses t
A car is hauling a 85.8-kg trailer, to which it is connected by a spring. The spring constant is 2360 N/m. The car and the trailer are moving with a constant acceleration of 0.487 m/s2. By how much
1. What is the minimum necessary power output rating of the water pump in watts? 2. What is the minimum necessary power output rating of the water pump in horsepower?
A 2.0-kg block is hanging stationary from the end of a vertical spring that is attached to the ceiling. The elastic potential energy of the spring/mass system is 2.8 J. What is the elastic potentia
A piece of angle iron is hinged at point A. Determine the resultant torque at A due to the two acting forces. Replace the 60 N force by a 40 N force and the 80 N force by a 100 N force. Please show
Find the resultant force on the donkey if the angle between the two ropes is a) 60°, b) 90°, c) 120°. One end is pulled with a force of 60 lb and the other is with a force of 30 lb. Use
A bulb emits light uniformly in all directions. The average emitted power is 150W. At a distance of 5m from the bulb, determine. The average intensity of the light, the end value of the electric fie
A 2400 resistor and a 1.8 if capacitor are connected in series across a generator(60hz 120v rms). Determine the average power delivered to the circuit.
The balloon rises to an altitude of 20,000 m where atmospheric pressure is 65 mmhg and the temperautre is 210k. What is the volume of the balloon at 20,000m?
A blobsled starts from rest and slides down a frictionless 7.5 deree slope. What's its final speed after 25 seconds?
Examine a particular application of thin film technology. Optical coatings(UVblock, anti---reflection, reflective...). Friction and wear coatings
Find the energy the person expends pulling the crate, the amount of energy converted to heat via friction, and the increase in the kinetic energy of the crate.
Using conservation of energy, find the velocity of the roller coaster at a height of 5 m above the ground. Sketch the problem before you solve it.
A 40,000 kg railroad car initially traveling at 10 m/s collides inelastically with a 20,000 kg railroad car intially at rest. The cars stick together. What is their final speed?
A surveyor wishes to find the distance between 2 inaccessible points, P and Q, on opposite sides of a lake. From point R, he finds the distance to P is 32670 yards and Q is 49468 yards. If the angl
First, provide a sketch of this problem. Then, find the gravitational potential energy of the box relative to the floor, and the gravitational potential energy of the box relative to the ledge.
Sketch a free body diagram showing the forces acting on the crate and find the energy the person expends pulling the crate, the amount of energy converted to heat via friction.
Given y = 2 sin (2p x + 1), find the amplitude, the period, and the phase shift. Given y = - 3 cos (4x - p) + 2, find the amplitude, the period, and the phase shift.
If he struck a ball with the a speed and launch angle that would result in a maximum 120m horizontal range on Earth, how far would it go?
Obtains a value of 0.085 s. The mass of the wire is negligible compared to the mass of the ball. Determine the acceleration due to gravity.
How does temperature affect the extent of dissociation of electrolyte?
Describe in detail the effect of increasing torque/load on the excitation current, armature current and output power as the power factor is maintained at 1.
One is thrown upwards at 20.0m/s, the other is thrown downwards at 8.0 m/s. How far apart are the two rocks after 1.5 seconds?
The weight of a body varies inversely with the square of its distance from the center of Earth. Assuming that the radius of Earth is 3960 miles, how much would a man weigh at an altitude of 1 mile
Find the Amplitude, period, and the phase shift of each function