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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 3 in. wide. Make an order-of-magnitude estimate of the number of leaves on this tree.
a 70.0-kg person stands on a scale in an elevator. what is the apparent weight in each of the following situations?a
A magnetic field has a magnitude of 0.0014 T, and an electric field has a magnitude of 4.2 × 103 N/C. compute the magnitude of the net force that acts on the charge
An ideal gas has its pressure cut in half slowly, while being keptin a container with rigid walls. In the process 265KJ of heat isleft in the gas: How much work is done during the process
Fish are hung on a spring scale to determine their mass (most fishermen feel no obligation to report the mass truthfully). How far apart are the half-kilogram marks on the scale
Consider two slabs of material with the same thickness, however made of different materials differing in their index of refraction. Which of the following are true? The frequency of light will differ in the two slabs. The speed of light will differ i..
A 1.50*10^3-kg car starts from rest and accelerates uniformly to 19.1 m/s in 12.0 s. Find the instantaneous power output of the engine at t = 12.0 s, just before the car stops accelerating
The density of ice is 917 kg/m3, and the density of sea water is 1025 kg/m3. What is the weight of the heaviest bear
the magnetic field 36.0 cm away from a long straight wire carrying current 6.00 a is 3.33 microt.a at what distance is
a ray of light is incident on the mid-point of a glass prismsurface at an angle of 25 degrees with the normal. for
pyramid lake is on the paiute indian reservation in nevada. the lake is famous for cutthroat trout. suppose a friend
If the RMS speed of the molecules in an ideal gas at 20 degrees C increase by a factor of 2, what is the new temperature
Bats use the Doppler effect as a directional guide and to detect insects. Find the frequency of the sound detected by the bat
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