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Q. A cannonball shot with an initial velocity of 148 m/s at an angle of 46° follows a parabolic path and hits a balloon at top of its trajectory. Neglect air resistance, how fast is the cannonball going when it hits the balloon?
Q. The length of a string is 532cm. It is held fixed at each end. The string vibrates in seven sections; i.e. string has seven antinodes, and the string vibrates at 150 Hz. What is the wavelength?
Mr. Physics drops a rock down a 250-meter deep well. Upon impact with the bottom of the well a short burst of sound is produced with a frequency of 250 Hz. How long after he drops the rock does he hear it hit bottom of the well.
A 1050 kg car carrying four 84 kg people travels over a rough "washboard" dirt road with corrugations 4m apart which causes the car to bounce on its spring suspension. The car bounces with maximum amplitude while its speed is 24km/h. The car now s..
A box with a mass of 8 kg is lifted (without acceleration) through a height of 9 m, in order to place it upon the shelf of the closet.
if a river flows due east at 1.68m/s. a boat crosses the river from the south shore to the north shore by maintaining a constant velocity of 13.40m/s due north relative to the water. if the river is 178m wide, how far downstream is the boat when i..
An uncharged capacitor is connected to a 55 V battery until it is fully charged, after which it is disconnected from the battery. A slab of paraffin is then inserted between the plates.
A car of mass 960 travels at a speed of 30 along the straight road. The driver sees a red traffic light ahead, and applies brakes. The coefficient of friction between the car tyres and the road is 0.88. Take the acceleration due to gravity to be 9.80..
Estimate the position of C.G or fulcrum & the masses of persons on a 16 feett sea saw, under balanced condition.
How many 65W light bulbs can be connected in parallel across a potential difference of 85 V before the total current in the circuit exceeds 2.10A.
Consider a standing wave on the string with a frequency equal to the fifth harmonic (fn = nf1 with n = 5). How many nodes and antinodes does this standing wave possess.
A high-frequency photon is scattered off of an electron and experiences a change of wavelength of 8.0×10-4 .At what angle should a detector be placed to detect scattered photon (relative to the direction of the incoming photon).
The rms speed of the molecules in 1.8 of hydrogen gas is 1600 m/s. What is total translational kinetic energy of the gas molecules.
assume that you are a Haitian taptap driverand want a more comfortable ride. You decide to replace the springswith new springs that can handle the typical heavy load on yourvehicle. What spring constant do you want your new spring system to have.
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