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A 300 kg elevator is being pulled upwards by a steel cable at a constant velocity. What is the net force on the elevator?
The two springs each have a spring constant of 11. They are stretched by 1 as a current passes through the wire. How big is the current.
A solenoid coil has a radius of 7.2 cm, a lenght of 31.5 cm, and has a 380 turns of wire. Calculate the field strength inside the coil
A parallel light beam containing two wavelengths, 480nm and 700nm, strikes a plain piece of glass at an angle of incidence of 60 degrees. Determine the angle between the two beams in the glass
A plane normally takes 10 hours to travel 5, 500 miles. One day significant headwinds slow the plane down, how long will the entire trip take
A 60 g bullet traveling at 230 m/s penetrates a block of ice at 0°C and comes to rest within the ice. suppose that the temperature of the bullet doesn't change appreciably, how much ice is melted as a result of the collision.
A box is lifted with a pry bar , by slipping the bar under the box and lifting up on the bar. what is the size of the force required to lift the box
A constant horizontal force Fa pushes a 3.70 kg FedEx package across a frictionless floor on which a xy coordinate system has been drawn. it gives the package's x and y velocity components versus time t. (The vx axis is marked in increments of 1.2..
A flatbed truck is carrying a load of timber which is not tied down. the mass of the timber is 800 kg, What is the highest acceleration that the truck can have without losing its load
The intensity in normal conversation, when about50 cm from the speaker, Estimate the power output of sound from a person speaking in normal conversation
Neglect air resistance, as well as any energy absorbed by the pole, and clerify her altitude as she crosses the bar.
Most of the motion generated by joints in the human body are examples of levers. An example of a third class lever is the forearm, what force is exerted by the biceps muscle
A train at a constant 75 km/h moves east for 48 min, then in a direction 61.0° east of due north for 11min, and then west for 67 min.
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