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you are kidnapped and put blindfolded in an elevator at the ground floor of a building. As the elevator starts, you notice that your weight seems to increase by 10% for 3 s, remain normal for 24 s, and put into a locked room. What is the approximate floor number your room is on?
A ball is thrown toward a cliff of height h with a speed of 29m/s and an angle of 60? ^\circ above horizontal. It lands on the edge of the cliff 3.5s later. How high is the cliff
I put a packing peanut on top of it, and it only took one rotation--or crank--to knock the material off from the machine and onto the ground. mass of the peanut=.001 kg, distance from the machine to the peanut=.0005m.
A circuit contains six 210 lamps and a 14 heater connected in parallel. The voltage across the circuit is 120V. If the circuit has a 12A fuse, will the fuse melt if all the lamps and the heater are on.
A person (body mass=72 kg) is taking off for a long jump. Ground reaction forces Fg,x = 250 N and Fg,z = 900 N. Calculate the resultant ground reaction force
Illustrate what tangential speed v must the bob have so that it moves in a horizontal circle with the string making an angle 19.0^circ with the vertical?
A point charge q = +37.0 µC moves from A to B separated by a distance d = 0.178 m in the presence of an external electric field, Find the work done by the electric force
An astronaut is in equilibrium when he is positioned 738 km from planet X and 472 km from planet Y, What is the ratio of the masses of two planets X/Y
A fellow student of mathematical bent tells you that the wave function of a traveling wave on a thin rope isy(x,t)= 2.10mm cos[( 6.96rad/m )x+( 744rad/s )t]. Determine the average power transmitted by the wave
A 12 ohm resistor, 16 mH inductor, and 95 microFcapacitor are connected in series to a 30 V (rms) source having variable frequency. Find the heat dissipated in the circuit during one period
A steel beam is suspended completely under water by a cable that is attached to one end of the beam, so it hangs perpendicularly. Another identical beam is also suspended completely under water, but by a cable that is attached to the center of the be..
A boy catches - with bare hands and his arm extended - a 0.16 kg baseball coming directly toward him ar a speed of 25 m/s. what is the average force the boy's hand feel while catching the ball
Helium forms a solid at low temperatures and high pressures. To maintain the order present in a solid, each atom must remain at its assigned position, Find the uncertainty in momentum of the helium atom
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