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In Denver, children bring their old jack-o-lanterns to the top of a tower and compete for accuracy in hitting a target on the ground. Suppose that the tower height is h = 8.20 m, and that the bulls-eye's horizontal distance is d = 4.1 m from the launch point. If the pumpkin is thrown horizontally,
a.) What is the launch speed needed to hit the bulls-eye?
A refracting telescope has an objective and an eyepiece that have refractive powers of 1.25 diopters and 300 diopters, respectively. Find the angular magnification of the telescope
The rocket's speed was measured to be 1.49 c. The rocket's rest length is 380m. An observer flying through measured the rocket to be 199m long.
A 0.2 kg steel ball is dropped straight down onto a hard, horizontal floor and bounces straight up. FIND the magnitude of the impulse delivered to the floor by the steel ball
Orb spiders make silk with a typical diameter of 0.15 mm.A typical large orb spider has a mass of 0.50 g. by how much will the silk stretch
Two Carts have a perfectly inelastic collision. Cart A has mass 34.8 kg and velocity 5.08 m/s directed north immediately before the collision. What is the speed of the two carts
An automobile has a total mass of 2200 kg. It accelerates from rest to 70 km/h in 40 s. Assume each wheel is a uniform 44 kg disk. find the total kinetic energy of the automobile
A 109-rad dose of radiation is administered to a cancer patient (mass = 73) kg). how much energy is absorbed
A ball is thrown vertically upward from the ground with an initial speed of 15.00 m/s. How long does it take the ball to reach its maximum altitude
A 12- V battery causes a current of 0.40A through a resistor. A) what is its resistance B) how may joules of energy does the battery lose in minutes.
A point charge +6.7 uC is placed at the origin, and a second charge -3.6 uC is placed in the X - Y plane at (0.40 m , 0.55 m ). Where should a third charge be placed in the plane so that the net force acting on it is zero? Express your answers usi..
A particle moves with constant acceleration a. The expression v1+at represents the particle's velocity at what instant in time.
A simple pendulum consists of a ball connected to one end of a thin brass wire. The period of the pendulum is 1.25 s. find the change in the period of the heated pendulum
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