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Two skaters, a man and a woman, are standing on ice. Neglect any friction between the skate blades and the ice. The mass of the man is 89 kg, and the mass of the woman is 66 kg. The woman pushes on the man with a force of 55 N due east. Determine the acceleration (magnitude and direction) of (a) the man and (b) the woman.
The inner and outer surfaces of a cell membrane carry a negative and positive charge, respectively. What is the magnitude of the electric field in the membrane
Mary applies a force of 79N to push a box with an acceleration of 0.56 m/s. When she increases the pushing force to 90 N, What is the mass of the box
A rectangular coil consists of N=100 closely wrapped turns and hasdimensions a=0.400m and b=0.300m. What is the expected direction of rotation of the coil
a string stretched between two fixed ends vibrates in its second harmonic with a frequency f=2 Hz. if the velocity that links the frequency and wavelength is equal to 40 m/s, find the wavelength of the stationary wave
Ceres, the smallest identified dwarf planet in the Solar System, has a radius R = 480 km, Use these numbers to calculate the escape speed from the surface of Ceres
A robot probe drops a camera off the rim of a 388 m high cliff on Mars, where the free-fall
A car's outside rear-view mirror is convex, with focal length -1.2m. What is it's apparent height, and what is its apparent location
A box of sand, initially at rest, is to be pulled across a floor by means of a cable in which the tension cannot be allowed to exceed 1100N. What is the weight of the sand and box in that situation
A 295 Kg piano slides 4.1 m down a 30 degree incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is .40.
when the dried up seed pod of a scotch broom plant bursts open it shoots out a seed with an initial velocity of 2.4 ms
The mass of the blue puck shown below is 20.0% greater than the mass of the green puck. Find the speeds the pucks have after the collision if half the kinetic energy of the system becomes internal energy during the collision
a heat engine operates between a hih temp reservoir at 610K and low temp reservoir at 320K. find the net change in entropy as a result of this cycle
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