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if a force of 500n is needed to stretch a spring 2 cm, what force is needed to stretch 5cm? How much work is done to stretch it 5cm? What is the spring potential energy at 5 cm?
A small ball rolls horizontally off the edge of a tabletop of height h, How long is the ball in the air and What is its speed at the instant it leaves the table
If a 2.00{rm kg} mass is now attached to the end of the spring, where will the end of the spring line up with the ruler marks?
In the Bohr model of the hydrogen atom, the speed of the electron is approximately 2.06 × 106 m/s, Find the centripetal acceleration of the electron
In a performance test, each of two cars takes 9.40s to accelerate from rest to 25 m/s. Car A has a mass of 1288 kg, and car B has a mass of 1767 kg. Find the net average force that acts on (1) car A and (2) car B during the test.
Compute the momentum of the bullet
An electric water heater operates at 66 A and 16 kilowatts, Calculate N (the total number of resistors) and the cost of manufacturing the heating element if in a pack of 100 resistors cost $0.50
The electric output of a power plant is 730MW . Cooling water flows through the power plant at the rate 1.30 ×108L/hr. What is the power plant's thermal efficiency
A 61 kg speed skater with the velocity of 16 m/s comes into a curve of 18 m radius. How much friction should be exerted between skates and ice to negotiate the curve.
In a phyiscs lab experiment, a coil with 200 turns enclosing an area of 13.7cm2 is rotated during the time interval 3.7E-2 from a position, What is the magnitude of the total magnetic flux
The fastest pitched baseball was clocked at 46 m/s. If the pitcher exerted his force (assumed to be horizontal and constant) over a distance of 1m, and a baseball has a mass of 145 g.
Physics: Find the shear stress on the rod and vertical deflection at the end of the rod, A horizontal aluminum rod 4.2 cm in diameter projects 7.6 cm from a wall. A 1400 kg object is suspended from the end of the rod
How much power must you exert to horizontally drag a 20.0 kg table 14.0 m across a brick floor in 40.0 s at constant velocity, assuming the coefficient of kinetic friction between table and floor is 0.550.
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