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Car travels up a hill at a constant speed of 31 km/h and returns down the hill at a constant speed of 75 km/h. calculate the average speed for the round trip.
alan leaves los angeles at 800 am to drive to san fransisco 400 mi away. he travels at a steady 50mph. beth leaves los
A car not engine has a power output of 150 kW. The engine operates among two reservoirs at 20.0oC and 500oC. A) How much energy does it take in per hour? B) How much energy is lost per hour in its exhaust?
A block of mass m1 = 6.67 kg on a frictionless plane inclined at angle ? = 33.6° is connected by a cord over a massless, What is the acceleration of the hanging block
A cylindrical ring has an outer diameter D, an inner diameter d, and a width w. A solid cylindrical disk of diameter (d + Φd) and width w is press fit completely into the ring. If the ring were thin (i.e., (D-d) is very small), how could you calcul..
AM radio signals are broadcast at frequencies between 530 kHz and1605 kHz (kilohertz) and travel 3.0 108 m/s. What is the range of wavelengths for these signals.
A mass m is connected to the bottom of a vertical spring whose force constant is k. Attached to the bottom of themass is a string that is connected to a second mass m, asshown in the figure . Both masses are undergoing simple harmonicvertical moti..
A baseball player runs 27.4meters from the batter's box to first base,overruns first base by 3.0 meters,and then returns to first base. Compared to total distance traveled by the player,the magnitude of the players total displacement from the batt..
A particle moves through an angle of 45o on a circle whose radius is 85 cm. What is the arc length traveled by the particle
Then, 25 s later, the cyclist is 45 m due north of the flagpole, going due east with a speed of 12 m/s. For the cyclist in this 25 s interval, find out each of the following. (a) displacement (b) average velocity (c) average acceleration
What is the smallest quantum of energy that can be absorbed by the molecule in a rotational excitation? What is the smallest quantum of energy that can be absorbed in a vibration excitation? In what regions of electromagnetic spectrum do the transiti..
In a typical experiment to study the force between electric currents in identical fixed and movable wires, the centres of the wires were separated 0.687 cm and the length of the movable wire was 26.5cm. The apparatus was set up so as to produce an..
trumpet creates a sound intensity level of 1.23 x 10^2 dB at a distance of 0.80 m. What is the sound intensity of a trumpet
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