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Q. A cannon tilted upward at angle = 35 fires a cannonball with a speed of 90 m/s. At that instant, what is the component of the cannonball's velocity parallel to the ground?
Q. A 1 m rod of pure copper 1 cm2 in cross section connects a 200 oC thermal reservoir with a 0 oC thermal reservoir. The system has already reached steady state. What is the rate of change entropy of the first reservoir?
What is the size of the gravitational force that the Earth exerts on the Moon.
Two ocean liners, each with a mass of 38,000 metric tons, are moving on parallel courses, 92 m apart. What is the magnitude of the acceleration of one of the liners toward the other due to their mutual gravitational attraction? Treat the ships as par..
To pump 100Joules of heat from the ice cube tray of freezing water at 273K, out into a hot room at 310 K, the laws of thermodynamics say that you will need at least how many Joules of ordered energy or work.
What types of lifestyle changes will be brought about by living in a house whose space heating and hot water needs are supplied almost completely by the sun.
When two tuning forks of 146Hz and 161Hz, respectively, are sounded simultaneously, how many beats per second are heard.
Why does the base of a shuttle cock always lead in motion when hit with a racket. what is grocery carts final speed.
A parallel-plate capacitor is charged to an electric potential of 337 V by moving 3.95×1016 electrons from one plate to the other. How much work is done in charging the capacitor.
An object is held up by two ropes. rope 1 makes an angle of 65 degrees above horizontal and the tension in it is T1 = 26N. rope 2 makes an angle of 32 degrees above horizontal and the object is in equilibrium. what is the tension in rope 2 (T2) an..
Concept to find certain type of electronic devices & circuits.
The distance between a loudspeaker and the left ear of a listener is 1.60 m. compute the time required for sound to travel this distance if the air temperature is 20° C.
As shown in the figure, sunlight is coming straight down (negative z-direction) on a solar panel (of length L = 1.51 m and width W = 0.930 m) on the Mars rover Spirit.
A 2.80 kg gold bar at 98 degrees celcius is dropped into 0.34 kg of water at 23 degree celcius. what is the final temperature? assume the specific heatof gold is 129 J/kg
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