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A stone is thrown vertically upward with velocity 100m/s. Calculate the speed of the stone when It has traveled 70% of the expected maximum height.
A balloon inflated with helium (density .2 kg/m^3). If the density of air is 1.3 kg/m^3, what is the bouyant force exerted on the balloon
A 2.0 microF capacitor and a 4.0 microF capacitor are connected in parallet across a 300V potential difference. Calculate the total energy stored in the capacitors
A wire carries a steady current of 1.54 A. A straight section of the wire is 0.616 m long and lies along the x axis within a uniform magnetic field of magnitude 1.6 T in the positive z direction. what is the magnetic force on the section of wire
The Leaning tower of Pisa is 55m tall and about 7.0 m indiameter. The top is 4.5m off center. Is the tower in stableequilibrium? If so, How much farther can it lean
Two moles of an ideal gas undergo a reversible isothermal expansion from 3.10×10^?2m^{3} to 5.00×10^?2m^{3} at a temperature of 27.0C. What is the change in entropy DeltaS of the gas
A black box is bolted to a beam with a cable as shown in the following figure. Consider the box as the system. During the process, the box raises in height as the cable goes into the box by an unknown mechanism. Assume that there is some friction ..
Three blocks are in contact and sitting on frictionless table. What is the magnitude of the force exerted by the third block on the second block
A light ray is incident on the outer surface of the vitreous humor at an angle of 42.0° with the normal. Find the angle thetransmitted ray makes with the normal.
The mass of a star is 1.75·1031 kg and it performs one rotation in 37.3 days. Find its new period (in /days) if the diameter suddenly shrinks
draw a motion diagram, using the particle model, showing the cars velocity vectors as seen from a helicopter hovering over the highway.
A proton is fired from far away toward the nucleus of a mercury atom. Mercury is element number 80, and the diameter of the nucleus is 14.0 fm. If the proton is fired at a speed of 3.4×107m/s , what is its closest approach to the surface of the nucle..
In what order are the Bayer letters assigned to stars? Is delta-Capricorni brighter than alpha-Capricorni? How do you know? In what order are Flamsteed numbers assigned to stars?
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