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A plastic bag is filled with hydrogen at atmospheric pressure and 27.0 oC. Assume that the mass of the bag is negligible and take the temperature of the outside air to be 0 oC. With the help of this "balloon" we want to lift a 43.0 kg girl off her feet.How large a volume of hydrogen (in m3) is required?
A 0.144 kg baseball is pitched horizontally at +38 m/s and after it is hit by the bat it moves horizontally at -38 m/s.
A force F = 200i - 400j + FZ k N, is acting through point A(0,0,0) m.
The voltage across a resistor is equal to the product of the current through the resistor and the resistance of the resistor, What is the potential difference of the battery
A car of mass 1500kg turns an incined corner (radius 50m, angle 30degrees), How fast can the corner be taken without losing traction
To construct a solenoid, you wrap insulated wire uniformly around a plastic tube 14cm in diameter and 55cm in length, What is the total length of wire you will need to meet these specifications
At the very bottom of the circle, a too sharp knife is suddenly inserted to cut the string directly below the point of support. How far to the right of where the string was cut does the ball hit the floor.
The volume control on a surround-sound amplifier is adjusted so the sound intensity level at the listening position increases from 21 to 59 dB. What is the ratio of the final sound intensity to the original sound intensity?
A box of 10 kg is being pulled across a floor with a tension force of 50 N. Assume the box started from rest and reached a speed of 2 m/s
A hypodermic syringe contains a medicine with the density of water. The barrel of the syringe has a cross-sectional area of 2.5 x10-5 m2.
A 258-kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 30.0° with respect to the horizontal. The coefficient of kinetic friction between the log and the ramp is 0.980, and the log has ..
A regulation soccer field for international play is a rectangle with a length between 90.0m and 111mand a width between 57.0m and 70.0m
If both of them are simultaneously plucked at the center, illustrate what is the frequency of the beats that they will produce when vibrating in their fundamental?
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