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The large blade of a helicopter is rotating in a horizontal circle. The length of the blade is 6.64 m, measured from its tip to the center of the circle. Find the ratio of the centripetal acceleration at the end of the blade to that which exists at a point located 4.28 m from the center of the circle.
What is the height of the power line and the initial speed of the ball?
A box is dropped from a spacecraft moving horizontally at 27.0 m/s at a distance of 155 m above the surface of a moon. The rate of freefall acceleration on this airless moon is 2.79 m/s2.
A galvanometer has an internal resistance of 30?and deflects full scale for a 60??A current, What is the magnitude of this resistor
The coefficient of static friction between the ladder and the ground is 0.55, and the ladder makes a 50.0° angle with the ground. Explain how far up the ladder can an 720 N person climb before the ladder begins to slip?
A 18 liter tank of helium is at a pressure of 192 kPa at a temperature of 0 C. A.) How many moles of helium are there in the tank? B.) If the volume of the tank expands to twice its initial volume at constant pressure, what is the new temperature?..
Calculate the net work done by the force of friction. A 1.50 m-long, 530 g rope pulls a 7.00 kg block of ice across a horizontal, frictionless surface. The block accelerates at 1.90 {rm m}/{rm s}^{2}. How much force pulls forward on (a) ice (b) rop..
Demonstrate that gravitational energy is not extensive: show that the gravitational energy of a sphere of radius 'r' and uniform density varies with volume V^n and find the exponent 'n'.
A boat moves through the water with two forces acting on it. One is a 1800 N forward push by the water on the propeller, What will its velocity be at the end of that time
What percentage of the neutrons would not interact if the concrete slab were made 36.0 cm thick? I know this is 1.305x10^1. B) How many centimeters thick would the concrete need to be so that 18.0 per cent of the neutrons are transmitted?
A 65kg, 1.70m tall person is standing in a room, Find the air temperature at which the heat transfer rate by radiation is just balanced by the rate of heat generation
A sound wave traveling at 341 m/s is emittedby foghorn of a tugboat. An echo is heard2.40 s later.How far away is the reflecting object? reply in units of m.
How much energy transfer as the reason of a temperature difference was there from the stove into the system consisting of the water plus the pan.
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