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A 2.2×10^4kg rocket has a rocket motor that generates 3.1×10^5N of thrust.
1. What is the rocket's initial upward acceleration?
2. At an altitude of 5000 m the rocket's acceleration has increased to 5.3m/s^2. What mass of fuel has it burned?
Three polarizing plates whose planes are parallel are centered on a common axis. The directions of the transmission axes relative to the common vertical direction, Calculate the transmitted intensity
While visiting Planet Physics, you toss a rock straight up at 11m/s and catch it 2.7s later. While you visit the surface, What is the mass of Planet Physics
A uniform magnetic field points north; its magnitude is 4.5 T. A proton with kinetic energy 7.1 10-13 J is moving vertically downward in this field. What is the magnetic force acting on it
An electric field of 490000 N/C points due west at the certain spot. What is the magnitude of the force that acts on a charge of -8.3 C at this spot.
An electron traveling at 86 m/s enters a 9.8 T magnetic field. The angle between the velocity and the field is 49o. Find the radius of the resulting circular path
A car of mass 2000kg is lifted up a a distance of 30m by a crane in 1 min. A second crane does the same job in 2 min. Do the crane consume the same or diffrent amounts of fuels
The radius of the GM tube's window is 3.5 cm. The source is 3 cm from the GM tube. Compare the surface area of a sphere 3 cm from the source to the area of the GM tube's window.
When there's a 277 Vrms across a device, the peak value of the alternating current is 4.1 A. How much power does the device comsume
The displacement of a standing wave on a string is given by D = 9.9 sin(0.55x)cos(56t), where x and D are in centimeters and t is in seconds. What is the distance (cm) between nodes
10g of lead (specific heat = 0.128 J/g C) at 100 C is placed on a glacier of ice at 0 C. How much ice melts
Suppose that the separation between two speakers A and B is 3.20 m and the speakers are vibrating in-phase. They are playing identical 121-Hz tones and the speed of sound is 343 m/s. An observer is seated at a position directly facing speaker B in..
if two neutral conducting pop cans are touching each other and a positively charged ballon is brought near them then
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