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Calculate the initial speed v0 such that a projectile, fired straight up from the surface of the Earth, will reach a distance of 2.7 R from the center of the Earth, where R is the radius of the Ear
A centrifuge is spinning at 5,400 rpm with radius 14 cm. (a) Find the period (b) Find the frequency
Suppose the gravitational field vector of a spherically symmetric mass distribution is a constant, i.e., independent of the distance from the center of the sphere. Determine the mass density ρ(r
The Sun radiates with an average power of 3.85 × 1026 W. Calculate the EM wave intensity incident on the Earth (above the atmosphere).
The screen is 250 cm from the slide. Assume that it is a thin lens. (a) What focal length does the lens need? b) How far should you place the lens from the slide?
Give an example of "the organism environment interaction being two way" with regard to how organisms change planetary chemistry and physics.
If the collision is completely inelastic, find v, the speed of the two boxes after the collision.
Identify the classical probability of finding the electron in this interval and state how it compares with the answer to part (a). (c) Repeat parts (a) and (b) assuming the particle is in the 99th e
The coefficient of kinetic friction between the log and the ramp is 0.890, and the log has an acceleration of 0.800 m/s2. Find the tension in the rope.
A 4.0 kg ball with a velocity of 5 m/s in the +x- direction collides head on elastically with a stationary 2.0 kg ball. What are the velocities of the balls after the collision?
Find ΔE, the energy lost during the collision between the ball and the ground.
A Fed Ex worker pulls a box of mass 20 kg with a force of 120 N at an 11 degree angle with respect to the floor (a) Ignoring friction, what is the acceleration of the box?
She first kicks it to player #2, who then kicks it into the net, the ball undergoes two successive displacements, y and x. What are the magnitude and direction of x and y?
A 2000 kg plane uniformly accelerates from rest to a launch speed of 300 km/h in 2.0 s. What is the magnitude of the net force on the plane?
A stream of water strikes a stationary turbine blade horizontally.the incident stream has a velocity of +16m/s while the exit has a velocity of -16m/s.the mass of water per second that strikes the
A soccer ball is kicked at a speed of 14 m/s at an angle of 9 degrees above the horizontal. (a) What are the horizontal and vertical components of the ball's velocity?
Though hard to believe, pumpkins have been projected a distance of 4086 feet in this contest. What is the minimum initial speed needed for such a shot?
A car starts from rest on a curve with a radius of 150m and accelerates at 1.000 m/s^2. How many revolutions will the car have gone through when the magnitude of its total acceleration is 3.30 m/s^
A ball at the end of a string of length 2.4 m rotates at a constant speed in a horizontal circle. It makes 7.8 rev/s. What is the period of the ball's motion?
Blocks with masses of 2.0 {rm kg}, 6.0 {rm kg}, and 9.0 {rm kg} are lined up in a row on a frictionless table. All three are pushed forward by a 20 {rm N} force applied to the 2.0 {rm kg} block. Ho
Estimate the maximum pressure developed in the container at equilibrium. The enthalpy of fusion of water may be taken as 333.4 kJ kg^-1, independent of temperature and pressure.
A 1.5 kg block sliding with a constant velocity of 6.0 m/s on a frictionless horizontal surface approaches a stationary 7.5 kg block.
A 3.0 kg cart traveling at 2.5 m/s slows down uniformly to a stop while moving a distance of 12 cm. What was the force exerted on the cart in bringing it to rest?
Speedy sue drivinng at 30 m/s enters a one lane tunnel. she then observes a slow moving van 155 m ahead travelling at 5 m/s .sue applies her brakes but can accelerate at 2 m/s squared because the r
A student pulls a rolling book bag by its handle. If the force used is 10 N and the handle makes an angle of 30 degrees to the horizontal, what is the work done by the pulling force after the stude