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A rocket blasts off and moves straight upward from the launch padwith constant acceleration. After 2.8s the rocket is at a height of 75m. What is the magnitude of the rocket's acceleration?
questioncora lies in a tanning bed getting a tan. suppose that as 0.79 m2 of her skin is exposed to the light from the
At high altitudes, water boils at a temperature lower than 100.0° C due to the lower air pressure. What activation energy does this rule imply for the chemical reactions
Radiotelescopes are designed to observe 21-cmwaves emitted by atomic hydrogen gas. Estimate the distance to this galaxy
A 47.0 g golf ball is driven from the tee with an initial speed of 50.0 m/s and rises to a height of 25.6 m. (a) Neglect air resistance and determine the kinetic energy of the ball at its highest point. J (b) What is its speed when it is 10.0 m below..
What if initially a charge 2.0 C is put on shell #1 with radius 3.2 m, then a far away shell #2 (initially neutral) with radius 8.1 m is connected to shell #1 by a long conducting wire. What is the electric potential V on shell #1
Michelle is enjoying a picnic across the valley from a cliff. She is playing music on her radio (assume it to be an isotropic source) and notices an echo from the cliff. what is the intensity of the music arriving at the cliff
During a process, 21.6 MJ of heat is added to a closed system. If the internal energy is increased by 59.6 MJ: How much work in Btu was done, Was this work done on or by the system
Suppose that 0.10mol of argon gas is admitted to an evacuated 50cm3 container at 20° C. The gas then undergoes isobaric heating to the temperature of 300°C. What is the final pressure of gas? What is the final volume.
An optical disk drive in your computer can spin a disk up to 10,000 rpm (about 1045 rad / s), what is the magnitude of the average angular acceleration of the disk
A 60 kg bicyclist rides his 9.8 kg bicycle with a speed of 16 m/s. What is the magnitude of the braking force
A venturi meter is a device for measuring the speed of a fluid within a pipe. A gas flowing at a speed v2 through a horizontal section of pipe whose cross-sectional area A2 = 0.0700 m2. The gas has a density of ? = 1.20 kg/m3.
A proton travels with a speed of 2.9×10^6 m/s at an angle 44 degrees with a magnetic ?eld of 0.99 T pointed in the +y direction. What is the magnitude of the magnetic force on the proton
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