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- Using mass (M), length (L), time (T) and current (A) as fundamental quantities, the dimensions of permeability are
1. Calculate the work done by a 2.0-N force (directed at a 80° angle to the vertical) to move a 500 gram box a horizontal distance of 500 cm across a rough floor at a constant speed of 0.8 m/s. Be cautious with the units. Show your solution.
2. Mrs. Salcedo's car of mass 2.4 x 10³ kg travelling on the highway when the teacher receives an emergency call. She increased the speed of the car to 33 m/s. The increase in speed results in 3.1 x10³ J of work done on the car. Determine the initial speed of the car in km/h.
3. A 80.0-kg person jumps onto the floor from a height of 5.00 m. If he lands stiffly (with his knee joints compressing by 0.500 cm), calculate the force on the knee joints.
How will you measure the height of a building if you do not have the necessary tools? Using the concept of free fall, illustrate, label, and explain how you are going to do it
Two spherical objects have masses of 250 kg and 550 kg. Their centers are separated by a distance of 45 m. Find the gravitational attraction between them.
Two spherical objects have masses of 250 kg and 550 kg. Their centers are separated by a distance of 45 m. Find the gravitational attraction between them.
Isaac applies a force of 40N at an angle of 60°up from the horizontal to a wooden rod using a spring scale.If he generatesa torque of 73 m.N,how long was the rod?
Calculate the minimum velocity with which water of coefficient of viscosity 0.001Nsm^-2 flows through a tube of radius 6×10^-4 m, without turbulence being produced.Reynolds number is 1000. Find the rate of flow of water through the tube at this velocity and the pressure is required to maintain it if the length of the tube is 0.2m
A football is moving upwards towards its peak after having been booted by the punter. Neglect air resistance. Diagram the forces upon the football as it rises upward towards its peak.
The energy emitted by radiation by a blackbody of surface area 410m2 and temperature of 155•c
The height of a cylindrical tank, containing 15 lb of gas at 70 psia and 115 Farenheit, IS TRIPLE ITS DIAMETER; the gas constant is R = 45 ft lbf/lbm R. find.
a) the tankdiameter in ft.
b)the tank height in ft.
