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Q. A sound wave moving through water has a frequency of 256 Hz and a wavelength of 5.77 m.What is the speed of sound in water?
Q. An antelope moving with constant acceleration covers the distance 73.0 m between two points in time 7.00 s. Its speed as it passes the second point is 14.7 m/s.
What is its speed at the first point?
What is the acceleration?
Two joggers run at a constant velocity of 7.5 m/s toward the east. At time t=0, one is 15m east of the origin and te other is 15m west.
A car accelerates from rest to a kinetic energy of 1.65 x 10^5 Joules in a distance of 646 m. How much force did the car's engine deliver to produce the change in kinetic energy.
When a charge that is free to move is released in the presence of an electric field, does it move from a region of high electric potential to a region of low electric potential or vice-versa? Does your reply depend on whether the charge is positiv..
An old hunting weapon was a rock on the end of a string. The hunter would swing the rock in horzontal circles and then throw it. If the rock had a mass of 2 kg and the 2 m long string breaks when the tension is 60N.
The pilot of an aircraft wishes to fly due west in a 34.60 km/h wind blowing toward the south. The speed of the aircraft in absence of a wind is 145 km/h.
A computer is reading data from a rotating CD-ROM. At a point that is 0.030m from the center of the disk, centripetal acceleration is 120m/s2. What is the centripetal acceleration at a point that is 0.05 m from the center of disc.
A ball on a porch rolls 60cm to the porch's edge, drops 40cm, continues rolling on the grass, and eventually stops 80cm from the porch's edge. What is the magnitude of ball's total displacement, in centimeters.
What is the magnetic field strength
Two identical speakers are driven by the same oscillator @ 200Hz. They are located on a vertical pole & 4.00 m apart. A man walks straight towards the lower speaker perpendicular to the pole.
An airplane is flying horizontally with a speed of 1000 km/h(280m/s) when an engine falls off. avoid air resistance,assume it takes 30s for the engine to hit the ground.
A toy train with 1.2kg mass is moving at a stright line platform with the velocity 12m/s. It collides another toy train of 0.9kg mass with velocity of 7m/s. If e = 0.8, what is the velocity of each train after the collision.
The minimum distance required to stop a car moving at 36.0 mi/h is 48 ft. What is the minimum stopping distance for the same car moving at 70.0 mi/h, assuming same rate of acceleration.
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