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A ball is thrown horizontally from the top of a 20-m high hill. It strikes the ground at an angle of 45 degrees. With what speed was it thrown?
The motion of the pistion o fan automobile engine is SHM. if the stroke of an engine (twice theamplitude) is 4 in. and the angular velocity is 3600 rev/mincompute the acceleration of hte pistion at the end of itsstroke
A fighter plane flying at constant speed 510 m/s and constant altitude 7400 m makes a turn of curvature radius 5300 m. What is his/her apparent weight during the plane's turn
In a dentist's office, an X-ray of a tooth is taken using X-rays that have a frequency of 8.07 multiply.gif 1018 Hz
A motorist drives north for 32.0minutes at 76.5 km/h and then stopsfor 15.0 minutes. He then continues north, traveling 130 km in1.60 h. What is his total displacement
A standard 35mm slide measures 24mm by 36mm. Suppose aslide projector produces a 60cm by 90cm image of the slide on a screen. What is the distance between the slide and the screen
two asteroids head straight for earth from the same direction. their speeds relative to earth are 0.79c for asteroid 1
suppose that an insulating container of negligible mass contains 0.12 kg of water at a temperature of 10 degrees c. now
a rifle with a mass of 2.8 kg fired a bullet with a mass of 0.003 kg. the bullet moves with a muzzle velocity of 420 m/s after the rifle is fired
The equation of a transverse wave on a string is y = (4.3 mm) sin[(19 m^-1)x + (300 s^-1)t] The tension in the string is 17 N. (a) What is the wave speed? (b) Find the linear density of this string in grams per meter.
It is believed that the universe began with a big bang about 17 billion years ago. If the speed of light is 2.99792 × 10^8, what is the maximum possible radius of the observable universe
An air bubble rises from the bottom of well where the temperature is 25 degree C, to the surface where the temperature is 27 degree C. Find the percent increase in the volume of the bubble if the depth of the well is 5 m. Atmospheric pressure is 101...
a cylindrical capacitor has two co-axial cylinders of length 15 cm and radii 1.5 cm and 1.4 cm. the outer cylinder is
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