Physics, 29.05.2021 19:20 joytheqt305
1. A moving plane drop of a package at a speed of 30 m/s. What is the vertical velocity of the
package after 30seconds?
2. From a tall building, a girl throws a piece of paper at a velocity of 15m/s. What is the
horizontal velocity of the paper after 8 seconds?
3. At what time will a ball thrown horizontally reach its velocity at 22.2 m/s downwards?
4. A stone is thrown at a speed of 12m/s. What is the horizontal velocity after 10 seconds?
5. A stone is thrown at a speed of 18m/s. What is the vertical velocity after 8 seconds?
Answers: 3
Physics, 21.06.2019 18:00
Amanometer is used to measure the air pressure in a tank. the fluid used has a specific gravity of 1.25, and the differential height between the two arms of the manometer is 34 in. if the local atmospheric pressure is 12.7 psia, determine the absolute pressure in the tank for the cases of the
Answers: 3
Physics, 21.06.2019 19:10
Athin, square metal plate measures 14 cm on each side and has emissivity of 0.60. the plate is heated to a temperature of 745°c. what is the rate at which the plate radiates energy ? the stefan-boltzmann constant is 5.67 × 10-8 w/(m2 ? k4). remember that the plate will radiate energy from both its top and bottom surfaces.
Answers: 1
Physics, 21.06.2019 22:20
Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 11.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.80 m/s; (b) he is then lifted at the constant speed of 4.80 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 78.0 kg rescue by the force lifting him during each stage
Answers: 2
Physics, 22.06.2019 05:20
Which statement is true? a. kepler's laws apply only to the motion of earth. b. kepler's laws can be used to predict eclipses. c. kepler's laws are true for a central force that is directly proportional to distance. d. kepler's laws can be deduced from newton's laws of motion and gravity.
Answers: 2
1. A moving plane drop of a package at a speed of 30 m/s. What is the vertical velocity of the
pack...
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