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Q. Assume a 64 kg boy and a 42 kg girl use a mass less rope in a tug-of-war on an icy, resistance-free surface. If the acceleration of the girl toward the boy is 3 m/s2, find out the magnitude of the acceleration of the boy toward girl.
Q. On your wedding day your lover gives you a gold ring of mass 3.80g. Fifty years later its mass is 3.35g. As an average, how various atoms were abraded from the ring during each second of your marriage?
What will be the equilibrium temperature when a 223 g block of copper at 258 C is placed in the 178 g aluminium calorimeter cup containing 874 g of water at 13.2 C.
You are trying to slide a refrigerator across a horizontal floor. The mass of the refrigerator is 188kg, and you require to exert a force of 347N to make it just begin to move. What is the coefficient of static friction between floor and refrigera..
What is the minimum pressing force that must be used.
Choose the correct explanation for why you can determine the maximum load given that theta_min is the minimum angle crane arm can make with the horizontal.
The burning of gasoline in a car releases about 3 × 10^4 kcal/gal. If a car averages 43 km/gal when driving 90 km/h, which requires 20 hp, what is an efficiency of the engine under those conditions.
What happens to support force on the workmens feet
What is the total momentum of system after the collision.
The edge of a cube consist of equal resistors of resistance R, that are joined at the orners, let a battery be connected to two opposite corners of a face of cube. what is the efective resistance.
An ocean liner leaves New York City and travels 37.0° north of east for 171 km. How far east and how far north has it disappeared? In other words, what are the magnitudes of the components of the ship's displacement vector in the directions.
A 78-kg man standing on a scale in an elevator notes that as elevator rises, the scale reads 834 N. What is the acceleration of the elevator.
If the barge can only be pushed 18 cm deeper into the water before water overflows to sink it, how many 400 kg horses can it carry.
Use this technique to find formula for the intensity of a sound, in terms of sound level and the reference intensity. There will be a quantity involved in the calculations. When you enter your answer, leave off the unit.
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