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During a solar eclipse, the Moon, Earth, and Sun all lie on the same line, with the Moon between the Earth and the Sun.
(a) What force is exerted by the Sun on the Moon?
_____________N
(b) What force is exerted by the Earth on the Moon?
_____________ N
(c) What force is exerted by the Sun on the Earth?
______________N
A 300 g bird flying along at 5.5 m/s sees a 10g insect heading straight toward it with a speed of 25 m/s. What is the bird's speed immediately after swallowing
n air-filled spherical capacitor is constructed with inner and outer shell radii of 7.00 and 14.0 cm, respectively. Calculate the capacitance of the device
The magnetic field B at the center of a circular coil of wire carrying a current I (as in fig. 20-9) is where N is the number of loops in the coild and r is its radius. estimate the magnetic field strength at the center of coil
An upright object is placed a distance in front of a converging lens equal to twice the focal length (f1) of the lens. On the other side of the lens is a converging mirror of focal length f2 separated from the lens by a distance 2(f1+f2).
Displacement d2 is in the xz plane 30° from the positive direction of the x axis, has a positive z component, and has magnitude 1.10 m.
Three fire hoses are connected to a fire hydrant. Each hose has a radius of 0.023 m. Find the water speed in each hose
Two sound sources driven in phase by the equal amplifier are d = 4 m apart on the y axis. At a point a very large distance from the y axis, constructive interference is first heard at an angle θ1 = 0.140 rad with the x axis.
A 1.80 MHz sound wave travels through a pregnant woman's abdomen and is reflected from the fetal heart wall of her unborn baby. The heart wall is moving toward sound receiver as the heart beats.
q1. a horizontal force of 10 n is applied to the outer edge of a door at an angle of 32deg to the door. the width of
A capacitor has parallel plates of area 12cm^2separated by 2.5 mm. The space between the plates is filled with polystyrene (K=2.6,Em=2.0*10^7 V/m). Find the permittivity of polystyrene
Two point charges are located on the x axis. The first is a charge +Q at x = ?a. The second is an unknown charge located at x = +3a. What are the two possible values of the unknown charge
Light of wavelength 630 nm passes through a grating and then onto a screen located several meters from the grating. Determine the wavelength of the second source
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