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A 932 kg rocket is motionless in space. To start moving, its main engine is fired for 7 s, during which time it ejects exhaust gases at 1205 m/s. At the end of this process it is moving at 17 m/s. What is the approximate mass of ejected gas?
A 1.60m cylindrical rod of diameter 0.450cm is connected to a power supply that maintains a constant potential difference of 15.0V across its ends, Find the resistivity and for the material of the rod at 20 ?C
A coil has 345 turns and self-inductance 3.60 mH. The current in the coil varies with time according to i = (680 mA) cos(?t/0.0250 s)
The specific heat of granite is 0.80 kJ/kg x C. If 106 MJ of heat are added to a 100-kg granite statue of James Prescott Joule that is originally at 18 degrees C
A 1.00uF capacitor is connected in parallel with a 2.00uF capacitor, Find the potential on the negative plate of the 1.00uF caacitor and the equivalent capacitance of the two capacitors
A charge of 20 nC is uniformly distributed along a straight rod of length 4.0 m that is bent into a circular arc with a radius of 2.0 m
In a heat conductivity experiment, a slab of silicon of thickness 2 x 10^-3m and area of 0.40m^2 seperates condensing steam(lv=540cal/g) at 100 degree C, Find the increase of entropy in the universe during one minute of this experiment
A 66kg skier starts from rest at the top of a 1200 m long trail which drops a total of 230m from top to bottom. how much energy was dissipated by friction
If the dummy is thrown forward with force of 130.0 N while simultaneously being hit from the side with a force of 4500.0 N, illustrate what force will the sensor report?
Charges of 3.00 nC, -2.00 nC, -7.00 nC, and 1.00 nC are contained inside a rectangular box with length 1.00 m, What is the electric flux through the surface of the box
Suppose that the sound level of a conversation is initially at an angry 70 dB and then drops to a soothing 50 dB. Assuming that the frequency of the sound is 500 Hz, determine the (c) initial and (d) final sound wave amplitudes.
Light is diffracted when it passes through a narrow single slit. What happens to the width of the central maximum in the diffraction pattern when the width of the slit trough which light passes is reduced.
The first-order bright fringe is a distance of 4.84 from the center of the central bright fringe. For what wavelength of light would the first-order dark fringe be observed at this similar point on the screen.
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