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A rock is thrown upward from a cliff 100 meters above the ground with an initial veloccity of 40 m/s. How long does it take for the rock to hit the ground? How long does the rock travel? How high is the rock after 6 seconds?
two 2.0 kg plastic garbage cans are sitting 2.6 meters apart on a sticky classroom floor coefficient of static friction
A sealed 62 m3 tank is filled with 6000 moles of ideal oxygen gas (diatomic) at an initial temperature of 270 K. find the mass density of the oxygen gas
A person makes a quantity of iced tea by mixing 500 g of hot tea (essentially water) with an equal mass of ice at its melting point. Assume that mixture has negligible energy exchange with environment. If tea's initial temperature is Ti = 90 C, when ..
If i have a hollow copper sphere that has an outer diameter of 20.00 cm that is floating so that everything is just submerged in a bucket of water
An electric heater is rated at 1300 W, a toaster is rated at 1150W, and an electric grill is rated at 1530 W. The three appliancesare connected in parallel to a common 123 V circuit.
While admiring a tree, you notice that the leaves form a more or less continuous spherical shell, with relatively few leaves growing in the shell interior. You estimate that the diameter of this shell is about 30 m. Every leaf is about 5 in. long and..
An electron with an initial speed of 6.00x105m/s is brought to rest by an electric field. find the potential difference that stopped the electron
What are memory tricks, and explain in theoretical terms why they work?
A parallel-plate capacitor has an area of 4.06 cm2, and the plates are separated by 1.01 millimeter with air between them. It stores a charge of 449 pC. Find the potential difference across the plates of capacitor
The electric field within the membrane separating the inside and outside of a biological cell is approximately 7.5 MV/m and is essentially uniform. what is the potential difference across the membrane
The rotor (flywheel) of a toy gyroscope has mass 0.140 kg. Its moment of inertia about its axis is The mass of the frame is 0.0250 kg. Find the upward force exerted by the pivot
an uncharged spherical shell has a diameter of 9.42 m and contains some distribution of charge inside. there is an
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