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You stand on a long flatbed railroad car which you estimate weighs about 4 times your own weight. Initially, the car rolls straight along the ground at 20 m/s, with negligible friction. You then begin to run across the top of the car opposite its own direction of motion relative to the ground. You estimate that your speed is about 5 m relative to the car. What is the resulting increase in the speed of the car?
The distance between the eyepiece and the objective lens in a certain compound microscope is 24.5 cm. compute the overall magnification of the microscope
Red laser light of 630 nm is incident upon a diffraction grating. determine the angle from the incident ray of the first diffracted ray
A parallel plate capacitor consists of two square metal plates of dimension 10 cm by 10 cm. The plates are separted by a distance of .1 mm. how does the capacitance change
The mass of a string is 1.00 10-3 kg, and it is stretched so the tension in it is 120 N. A transverse wave traveling on this string has a frequency of 260 Hz and a wavelength of 0.60 m. What is the length of the string?
A building with a weight of 5.200e+7 N is built on a concrete foundation with an area of 1300 m2, By what vertical distance does the foundation compress
Two metal spheres, each of mass 14 g and initially at rest, are dropped from a height of 6 m in an evacuated chamber. One sphere has a charge of +50 ?C, and the other has a charge -50 C.
A satellite orbits Neptune 4000 km above its surface. Given that the mass of Neptune is 1.02 x 10^26 kg, calculate the orbital speed of the satellite
For safety in climbing, a mountaineer uses a nylon rope that is 50 m long and 1.0 cm in diameter. Find its Young's modulus
There is a square with 4 charges. q3 is 3x10^-6 C and in the top left q4 is -2x10^-6 C and in the top right q2 is 2x10^-6 C and in the bottom left q1 is 4x10^-6 C and in the bottom left The distance between each charge on the outer edge of the squ..
Suppose the peak of a particular star's spectrum occurs at about 6000 Å (Angstrom). (a) Use Wien's law to calculate the star's surface temperature. (b) If this star were a factor of four hotter, at what wavelength would its spectrum peak? In what ..
Resistors are assigned a power rating. If the power rating isexceeded significantly, the resistor will overheat and crack.Suppose you have a 9 k ,0.2 watt resistor. What is the maximum voltage it can safelyhandle?
Since you are pulling up a little on the crate, the floor doesn't have to support as much weight. When you are pulling up on the rope as described above, what is the upward force that the floor exerts on the crate.
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