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1. A spelunker (cave explorer) drops a stone from rest into a hole. The speed of sound is 343 m/s in air, and the sound of the stone striking the bottom is heard 1.57 s after the stone is dropped. How deep is the hole?
A 15kg block is on a ramp which is inclined at 20 degree above the horizontal it is connected by a sting to 19kg mass which hangs over the top edge of the ramp. Assuming that fractional forces might be neglected, what is the magnitude of the accelera..
A car is accelerating while its horn is blowing. Just after the car passes a stationary person, the person hears a frequency of 978 Hz. 16.0 seconds later, the frequency heard by the person has decreased to 915 Hz.
Suppose you have a spherical balloon filled with air at room temperature and 1.0 atm pressure; its radius is 8cm. what's the balloon's new radius
A heat engine in each cycle extracts 50,000 Btu of thermal energy and rejects (or releases) 20,000 BtU of thermal energy. How many Btu of work is done each cycle
in a pool game a cue ball traveling at 0.80 ms hits the stationary eight ball. the eight ball moves off with a velocity
Show that a hummer dropped from two storey building roof does more work than a hammer falling from a coffee table. Calculate the potential energy from the two heights.
Compute the expected sea level rise for the projected 4°C mean global temperature rise anticipated by 2100. The average depth of the ocean is 3790 m, but you will not consider this whole depth to be expanding. Instead you will only consider the ex..
An electron accelerated from rest through a voltage of 370 Volt enters a region of constant magnetic field. determine what is the magnitude of the magnetic field
A uniform drawbridge must be held at a 37 deg. angle above the horizontal to allow ships to pass underneath. Find the direction and magnitude of the force the hinge exerts on the bridge
The electron gun in a television tube is used to accelerate electrons with mass 9.109 × 1031 kg from rest to 2 × 107 m/s within a distance of 7.3 cm. what electric field is required in the tube
A cylinder of length L = 18 cm and radius R = 5.4 cm has its center at the origin and its axis along the x axis such that one end is at x= +9 cm , What is the net charge inside the cylinder
You make a capacitor by cutting the 13 centimeter diameter bottoms out of two aluminum pie plates, separating them by 3.25 millimeter, Determine the capacitance of your capacitor
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