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It is claimed that if a lead bullet goes fast enough, it can melt completely when it comes to a halt suddenly, and all its kinetic energy is converted into heat via friction. Find the minimum speed of a lead bullet (initial temperature = 39.0° C) for such an event to happen? (Use Lf = 2.32 104 J/kg and melting point = 327.3°C.)
In a ballistics test, a 22.0g bullet traveling horizontally at 1300m/s goes through a 30.0cm -thick 350kg stationary target and emerges with a speed of 900m/s, How long is the bullet in the target
A 80.0 Hz generator with an rms voltage of 150 V is connected in series to a 3.20 k ohm resistor and a 3.50 micro farad capacitor. Find the phase angle between the current and the voltage
In an integrated circuit, the current density in a 2.9 ??m?thick× 71 ??m?wide gold film is 7.7×105A/m2, How much charge flows through the film in 15 min
A mirror produces an image of the sun, and the image is located 0.9900 m from the mirror. What is the algebraic expression for the object distance do of the tree from the mirror
1.a car uniformly decelerates at a rate of -5.00 ms2. how far does the car travel after 1.50 seconds if it initially
Standing waves on a 1.7m long string that is fixed at both ends are seen at successive frequencies of 36 Hz and 54Hz A) What is the fundamental frequency B) What is the wave speed
A parcel of dry air is lifted isothermally such that its pressure decreases from 1000 hPa to 850 hPa. Calculate the change in the specific entropy of the parcel.
A plastic bucket with negligible mass and specific heat holds 2 kg of water at temperature 20c. Find the entropy change of the ice as it cools and freezes into ice
During the late 19th and early 20th centuries, direct observations showed that a glacier in Switzerland flowed forward in the downhill direction while its snout (terminus) was retreating higher up the valley? Which of the following describes these..
A light bulb emits light uniformly in all directions. The average emitted power is 150.0 W. At a distance of 4.50 m from the bulb, find out (a) the average intensity of the light, (b) the rms value of the electric field, and (c) the peak value of t..
The second orbit for the only electron in a He+ ion has a radius of 5.29 X 10^-11 m. What is the speed of an electron in that orbit
A proton starts out moving horizontally from a positive plate to a negative plate of equal size and equal magnitude of charge. Calculate this difference of heights in meters
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