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A starship is circling a distant planet of radius R. The astronauts calculate that the free-fall acceleration at their altitude is half the value at the planet's surface. Find how far above the surface are they orbiting? Answer will be a multiple of R.
A homemade capacitor is assembled by placing two 7 in pie pans 10 cm apart and connecting them to the opposite terminals of a 9 V battery. Estimate the electric field halfway between the plates
When a 9.36 kg block is placed on top of avertical spring, the spring compresses 4.03 cm. Find the force constant of the spring.
Two converging lenses (f1 = 8.50 cm and f2 = 5.90 cm) are separated by 17.4 cm. The lens on the left has the longer focal length. Locate the final image relative to the lens on the right
In both the Rutherford theory and the Bohr theory, we neglected any wave properties of the particles. Estimate the de Broglie wavelength of an alpha particle and compare it with the size of the nucleus. Is the wave behavior expected to be important i..
a 9900 linecm grating reveals that a beam of light contains three different wavelengths. if the light had been
Under controlled darkened conditions in the laboratory, a light receptor cell on the retina of a person's eye can detect a single photon of light of wavelength 505 nm, What is the intensity (in W/m^2) delivered to a rod
Why is surface wind always directed at some angle across sea-level isobars toward lower pressure? Why is the surface wind directed across the sea-level isobars at a greater angle in Madison than over the middle of Lake Michigan.
A 9.6-cm-diameter circular loop of wire is in a 1.10-T magnetic field. The loop is removed from the field in 0.15 s. What is the average induced emf
A metallic sphere has a charge of +3.9 nC. A negatively charged rod has a charge of -6.0 nC. What are the charges of the sphere and the rod now
A tire with an inner volume of 0.0250 m is filled with air at a gauge pressure of 36.0 psi (i.e. lb/in2). If the tire valve is opened to the atmosphere, what volume outside of the tire does the escaping air occupy?
an electric field of intensity 3.0 knc is applied along the x-axis. calculate the electric flux through a rectangular
A sphere of copper that has a radius of 5 cm is compressed uniformly by a force of 3.0 108 N. Calculate the change in volume of the sphere
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