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A hot air balloon is ascending straight up at a constant speed of 5.70 m/s. When the balloon is 11.0 meter above the ground, a gun fires a pellet straight up from ground level with an initial speed of 33.0 m/s. Along the paths of the pellet and the balloon, there are two places where each of them has the identical altitude at the same time. Compute how far above ground level are these places?
a laser beam passes through a converging lens with a focal length of 19cm... at what distance past the lens has the
a wire is formed into a circle having a diameter of 10.2 cm and is placed in a uniform magnetic field of 3.24 mt. the
Heather and Jerry are standing on a bridge 50 m above a river.Heather throws a rock straight down with a speed of 20 m/s. Which rock has the faster speed as it hits the water
the brakes of a truck cause it to slow down by applying a retarding force of 3.0x103n to the truck over a distance of
A point moves along the x-axis with its position, x, at time t given by x(t) = t3 - 3t2 + 2t - 1. Which of the following is the acceleration when t = 2?
An automobile tire has a volume of 0.0185 m3. If the pressure in the tire is 500 kPa and the temperature is 298 K, how many molecules are there inside the tire
When light of wavelength 300 nm falls on a cobalt surface, electrons are emitted that have a maximum kinetic energy of 0.240eV. Compute The cut off wavelength, The work function of cobalt,
A spherical balloon containing oxygen gas has a radius of 13.2 cm. what is the mass of oxygen in the balloon
The thrust produced by a single jet engine creates a force of F = 63000 N. It takes the jet (with a mass of m = 9300 kg) a distance of d = 0.75 km to take off. What is the take-off speed of the jet vt in m/s
A small, 200 kg cart is moving at 1.50 m/s on an air track when it collides with a larger, 1.00 kg cart at rest. What is the speed of the large cart after the collision
The nucleus of 8Be, which consists of 4 protons and 4 neutrons, is very unstable and spontaneously breaks into two alpha particles (helium nuclei, each consisting of 2 protons and 2 neutrons).
A 0.30 kg puck, initially at rest on a frictionless horizontalsurface, Find the fraction of kinetic energy lost in the collision
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