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Q. Suppose that you hear a clap of thunder 15.4 s after seeing the associated lightning stroke. The speed of sound waves in air is 343 m/s and the speed of light in air is 3.00 108 m/s. How far are you from the lightning stroke?
Q. A gymnast of mass 66.0 kg hangs from a vertical rope attached to the ceiling. You can ignore the weight of the rope and assume that the rope does not stretch. Use the value 9.81 for the acceleration of gravity.
1)Calculate the tension in the rope if the gymnast hangs motionless on the rope.
2)Calculate the tension in the rope if the gymnast climbs the rope at a constant rate.
3)Calculate the tension in the rope if the gymnast climbs up the rope with an upward acceleration of magnitude 1.40 m/s^2.
4)Calculate the tension in the rope if the gymnast slides down the rope with a downward acceleration of magnitude 1.40 m/s^2 .
The venturi flowmeter shown in the figure is used to measure the flow rate of water in a solar collector system. The flowmeter is inserted in a pipe with diameter 1.9 {rm cm}; at the venturi of flowmeter the diameter is reduced to 0.64 {rm cm}. Th..
An aging coyote cannot run fast enough to catch a roadrunner. He purchases on eBay a set of jet-powered roller skates, which provide a constant horizontal acceleration of 15.0 m/s2. The coyote starts at rest 70.0 m from the edge of a cliff at the ins..
A bomb is dropped from an airplane in level flight at a speed of 970 km/h. The altitude of the aircraft is 2000 m. At what horizontal distance from the initial position of the aircraft will the bomb land.
Two lenses that are L = 42 cm apart are used to form an image, as shown in figure. Find the distance from lens and magnification of the image.
How much charge passes during the starter motor
A toy train is pushed forward and released at xi = 1.60 m with a speed of 2.60 m/s. It rolls at a steady speed for 1.30 s, and then one wheel begins to stick. The train comes to a stop 6m from its starting point. What is the train's acceleration a..
Why is surface wind always directed at some angle across sea-level isobars toward lower pressure? Why is the surface wind directed across the sea-level isobars at a greater angle in Madison than over the middle of Lake Michigan.
What is the dissimilarity between sprinters and nonathletes
What is braking distance for the first train
A ship sets out to sail to a point 136 km due north. An unexpected storm blows the ship to a point 108 km due east of its starting point. How far must it now sail to reach its original destination.
A 340 kg piano slides 3.7 m down a 33° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.37.
An elastic cord is 69 cm long when a weight of 57 N hangs from it but is 70 cm long when the weight of 75 N hangs from it. What is the "spring" constant k of this elastic cord.
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