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A ball swings in a vertical circle at the end of a rope 1.50 mlong attached to the ceiling. When the rope is 36.9 degrees pastthe lowest point and is on its way up, its total acceleration isgiven by (-22.5 i + 20.2 j) m/s2. At thatinstant determine the magnitude of its radial accelation and the speed and velocity of the ball.
A 4000.0 kg spaceship is traveling toward the moon at a velocity of 20.000 km/s. At the rear of the spaceship, What is the spaceship velocity after the rocket fires
the mean fee path of air molecules at 0 C and 1 ATM is about 2*10^-5 cm. what is the effective molecular diameter of an air molecule
A person walks first at a constant speed of 5.10 m/s along a straight line from point to point and then back along the line from to at a constant speed of 2.95 m/s. (a) What is her average speed over the entire trip? (b) What is her average veloci..
The diffusion constant for the alcohol ethanol in water is 1.24 10-9 m2/s. A cylinder has a cross-sectional area of 3.95 cm2 and a length of 1.84 cm. what mass of ethanol diffuses through the cylinder
The earth has a net electric charge that causes a field at points near its surface equal to 150N/C and directed in toward the center of the earth. a) What magnitude and sign of charge would a 60 kg human have to acquire to overcome his or her weig..
You land on a new planet with radius 5000km. You measure the freefall acceleration due to gravity to be 8.5m/s^2 at the surface
A particularly beautiful note reaching your ear from a rare Stradivarius violin has a wavelength of 39.1 cm. The room is slightly warm, so the speed of sound is 344 m/s. Part A If the string's linear density is 0.560g/m and the tension is 160N , how ..
A diver springs upward from a board that is 5 meters above the the water. determine her peak height measured above the water
A uniform ladder of length L and mass m leans against a frictionless vertical wall, making an angle of 48° with the horizontal. how high can you climb before the ladder begins to slip
A horizontal force of magnitude 34.5 N pushes a block of mass 4.09 kg across a floor where the coefficient of kinetic friction is 0.609. During that displacement, the thermal energy of the block increases by 39.3 J. What is the increase in thermal ..
In the rectangle in the drawing, a charge is to be placed at the empty corner to make the net force on the charge at corner A point along the vertical direction
A projectile of mass 2.06 kg approaches a stationary target body at 7.70 m/s. What is the speed of the target body
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