Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Question 1 A person pulls a crate with 120 N of force against 100 N of friction a distance of 5 meters. 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, and the increase in the kinetic energy of the crate. Question 2 A box of mass 4 kg is resting on a table 1.5 m above the floor. There is also a ledge located 5 m above the floor. 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. Question 3 An 80 kg man climbs a 50 m-high hill in 20 minutes. What is the average power in watts he expends climbing the hill? Question 4 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? Question 5 A roller coaster is initially at a height of 40 m above the ground and has an initial velocity of 15 m/s. 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 farsighted man uses eyeglasses with a refractive power of 1.95 diopters. Wearing the glasses 0.02 m from his eyes, What is the correct contact lens prescription, in diopters
The lifetime of the excited component of the n = 1 state (parallel spins) that produces the 21 centimeter line transition is approximately 107 years. Determine what is the energy line width of this state
When two lenses are used in combination, the first one forms an image that then serves as the object for the second lens. Find the location and height of the image
A 65 kg person jumps from awindow to a fire net 23 m below, whichstretches the net 1.5 m. How much would it stretch if the person jumped from 30 m
If 7 V is applied to the above circuit and the voltage across the first lamp is 1 V, what is the voltage across the second lamp
At its highest temperature, a space heater has a resistance of 19.5 ohm, find the average power output of the space heater
A 1.5 kg mass is moving in a circle of radius 2 m on a flat frictionless table at the end of a string. What is the angular momentum of the mass
1 an antenna is connected to a car battery. will the antenna emit electromagnetic radiation? why or why not? explain.2
In a Compton scattering experiment, an x-ray photon scatters through an angle of 17.0° from a free electron that is initially at rest. Calculate the angle through which the electron scatters
A tank circuit in a radio transmitter is a series RCL circuit connected to an antenna. determine the maximum inductance of the tank circuit
A catapult launches a test rocket vertically upward from a well, giving the rocket an initial speed of 81.0 m/s at ground level. What is its maximum altitude
q1. an green hoop with mass mh 2.5 kg and radius rh 0.14 m hangs from a string that goes over a blue solid disk
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd