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A huge explosion is heard 58.8 miles away. How long does it take the sound to travel that far? (Assume ambient air temperature is 20oC.) Record your answer to then earest whole second. No decimal places in your answer. Be careful of your units.
A moving particle encounters an external electric field that decreases its kinetic energy from 9820 eVto 7470 eV as the particle moves fromposition A to position B. The electric potentialat A is -51.0 V, and the electric potential at B is +28.9 V.
A pot of hot water is boiling on your stove. The pot is in the shape of a round cylinder made of aluminum which is 10 cm in radius. calculate the change in entropy of the boiling water
What is the magnitude of the average force of the bat on the ball throughout the ball-bat contact.
A simple Atwood’s machine uses a massless pulley and two masses m1 and m2. Starting from rest, the speed of the two masses is 8.4 m/s at the end of 7.2 s. At that time, the kinetic energy of the system is 62 J and each mass has moved a distance of 30..
You create a diffrent kind of pendulum by swinging a meter stick (mass m) on its end. It swings with small oscillations. Determine the angular frequency w ( I=1/3 ML ^2)
The same device can act as both an air conditioner and a heat pump (after all, they do the same thing), what is the coefficient of performance of the device acting as a heat pump
You are going to change the angle phi2 of applied force on the right side of the Equal Arm Balance keeping the holding force constant and the Balance in equilibrium
Two crates, of mass 77 kg and 108 kg, arein contact and at rest on a horizontal surface (Fig. 4-47). A 729 Nforce is exerted on the 77 kg crate.If the coefficient of kineticfriction is 0.15, calculate the following: the force that eachcrate exerts..
A crate is resting on a ramp that is inclined at an angleabove the horizontal, The coefficient of kinetic frictionbetween the crate and the ramps surface is 0.600. Find the acceleration of the moving crate
Your job is to lift 30kg crates avertical distance of 0.90m from the ground onto the bed of a truck. How many crates for an average power output of 100W
The plates of a parallel plate capacitor are separated by 5mm. The electric field among them is 4.2 x 10^5 V/m. A proton is released with an initial velocity of zero at the positive plate. Suppose there is a vacuum between the plates.
A proton is accelerated from rest through a potential difference of 25800 V. The mass of a proton is 1.673 x 1027 kg and the elemental charge is 1.602 x 10-19 C. What is the speed of the proton
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