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1. Through a thunderstorm, 4.7s elapses between observing alighting flash and hearing the resulting thunder. About how far away in kilometres and miles was the lighting flash?
_____km
______mi
2. Picnickers see a lightning flash and hear the resulting thunder 7.9 s later. If the storm is traveling at a rate of 11km/h, how long, in minutes, do the picnickers have before the storm arrives at their location?
____min
A 22.0-caliber rifle bullet of mass 1.80 grams, traveling at 340m/s, strikes a block of soft wood, which it penetrates to a depth of 0.100 meters. The block of wood is clamped in place and doesn't move. Assume a constant retarding force. What force, ..
A basketball is released from a height of 2.00 m above the floor and enters a basket that is 3.0 m above the floor. How far was the shooter from the basket
the electric potential at points in an xy plane is given by v 1.6 vm2x2 -3.5 vm2y2. what are a the magnitude of the
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a cell membrane has a resistance and a capacitance and thus a characteristic time constant. what is the time constant
An anchor, made of cast iron of bulk modulus 60.0 × 109 Pa and of volume 0.230 m3, Find the change in the volume of the anchor
A 3.00kg stone is sliding to the right on a frictionless horizontal surface at 5.50m/s when it is suddenly struck by an object that exerts a large horizontal force on it for a short period of tim, What impulse does this force exert on the stone
an engineer wishes to determine the spring constant of a helical spring. she first puts enough weights on the spring to
Suppose a hiker of weight W climbs a mountain of height H with an efficiency n on a cool day with temperature TA, How many food calories are required
A 73.0-μF capacitor is connected to a generator operating at alow frequency. The rms voltage of the generator is 3.00 V and isconstant. A fuse in series with the capacitor has negligibleresistance and will burn out when the rms current reaches 17...
A block of mass 0.570 kg is pushed against a horizontal spring of negligible mass until the spring is compressed a distance x. The force constant of the spring is 450 N/m.
An airplane with a wing span of L = 27m flies horizontally at a location where the vertical component of the Earth's magnetic field is B = 6.0 x10 -5 T.
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