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Large meteorites are hardly slowed by Earth's atmosphere. Assuming the atmosphere is 100 km thick ans that a large meteoritefalls perpendicular to the surface, how long does it take to reach the ground?
Suppose the slope of a beach underneath the ocean is 20 cm of dropoff for every 1.6 m of horizontal distance. A wave is moving inland, slowing down as it enters shallower water. What is its acceleration when it is 11 m from the shoreline?
A spiral staircase winds up to the top of a tower in an old castle. To measure the height of the tower, a rope is attached to the top of the tower and hung down the center of the staircase. What is the height of the tower
A small droplet of oil with mass of 3.49×10-16 kg is held suspended in a region of uniform electric field directed upward with a magnitude of 7125 N/C. How many excess elementary charges reside on the droplet
A 0.51 kg mass vibrates according to the equation x = 0.43 cos 8.37t, where x is in meters, and t is in seconds. (a) Determine the amplitude. m (b) Determine the frequency. Hz (c) Determine the total energy. J (d) Determine the kinetic energy and pot..
A 8.00?F parallel-plate capacitor with circular plates is connected to a 11.0V battery. How much charge would be on the plates if their separation were doubled while the capacitor remained connected to the battery
Consider a cloud that, when viewed from a point on the surface, occupies the portion of the sky defined by: pi/4
A 5 kg mass attached to a horizontal spring is pulled from its equilibrium position by 3 m and let go. what is the maximum velocity of the mass
You are in a laboratory and investigating properties of a converging lens. Calculate how far the image is from the lens
A 45.0 kg person, standing 1.3 m from the axis, begins to run on the disk in a circular path and has a tangential speed of 2.80 m/s relative to the ground. Find out the resulting angular speed of the disk (in rad/s)
How does reaction time affect emergency situations, like braking in a car? Estimate the distance a car travels at 100km/hr due to your reaction time in braking
A fireworks rocket is launched vertically into the night sky with an initial speed of 40 m/s. find the magnitude and direction of the second piece
Travelling at a speed of 17.10 m/s, the driver of an automobile suddenly locks the wheels by slamming on the brakes. The coefficient of kinetic friction between the tires and the road is 0.740. What is the speed of the automobile after 1.81 s have el..
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