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Question1
Marilyn (M) and her (identical in every way) twin sister Sheila (S) are riding on a merry-go-round revolving at a constant rate. Sheila is half way in from the edge. Which best explains relationship between the angular momentum of the two sisters?
Question2
The acceleration of gravity is 9.8 m/s2.If speed of the child at the lowest position is 2.21972 m/s, what is mechanical energy dissipated by the various resistive forces (such as friction, etc.)?Answer in units of J
Question3
A person eats a dessert that contains 260 Calories. (This "Calorie" unit, with a capital C, is the one used by nutritionists; 1 Calorie = 4186 J.) The skin temperature of this individual is 36°C and that of her environment is 21° C. The emissivity of her skin is 0.75 and its surface area is 1.3 m2. How much time would it take for her to make a net radiant energy from her body that is equivalent to energy contained in this dessert?
Calculate how long it will take a ball to hit the ground if dropped from a height of 44 m,
In a two-dimensional tug-of-war, Alex, Betty, and Charles pull horizontally on an automobile tire at the angles, What is the magnitude of Betty's force
Consider a group of 20 molecules with the following speeds: three have speed 1 m/s, Determine the rms speed (in m/s) of the molecules in this group at this instant in time
Illustrate what is the average force exerted on the ball by the bat? Neglect the weight of the bat, since it is so much less than the force of the bat. Choose the direction of the incoming ball as the positive direction.
A small motor is mounted on the axis of a space probe with its rotor (the rotating part of the motor) parallel to the axis of the probe. Through how many revolutions has the rotor turned
The nucleus of a hydrogen atom is a single proton, which has a radius of about 1.2 × 10-15 m. What is the ratio of the density of the hydrogen nucleus to the density of the complete hydrogen atom
Calculate the gravitational force exerted on the satellite by the Earth when it is in orbit
A fireman 52 m away from a burning building directs a stream of water from a ground-level fire hose at an angle of 32° above the horizontal.
An 9.00-cm-diameter, 330g solid sphere is released from rest at the top of a 1.70-m-long, 20.0? incline. What is the sphere's angular velocity at the bottom of the incline
What average force is required to stop an 1100-kg car in 8.0 seconds if the car is traveling at 95 km/h
Calculate the discharge in cubic meters per second and in cubic feet per second if A pipe with 2m diameter carries water having a velocity of 4 m/s.
Assume that the reactor operates 80% of the time, that all the energy generates arises from the fission of 92U235 and that this nucleii is consumed only by the fission process.
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