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1. Earth's acceleration during eclipses.
What is the percentage change in the acceleration of Earth toward the Sun when the alignment of Earth, Sun, and Moon changes from an eclipse of the Sun (with the moon between Earth and Sun) to an eclipse of the Moon (Earth between Moon and Sun)?
Assume that Earth's orbital path around the Sun is a perfect circle and that the Moon's orbital path around Earth is also a perfect circle, in the same plane. Also assume that the Moon orbits around Earth's center of mass and Earth orbits around the Sun's center of mass. (Although none of these assumptions are actually true, they are not far off.)
2. Twin Sun system.
In a hypothetical binary star system, each star has the same mass as our Sun, and they revolve about their center of mass. Their orbit is perfectly circular, so that the distance between them is always exactly twice the distance between Earth and our Sun. What is the period of the stars' rotation?
A small object with mass 0.200 kg swings back and forth on the lower end of a light rope that is 3.00 m long. what is the tension in the rope
An athlete executing a long jump leaves theground at a 30° angle and travels 6.80 m. If this speed were increased by just5.0%, how much longer would the jump be
With the engines off, a spaceship is coasting at a velocity of+230m/s through outer space. The ship carries rockets that aremounted in firing tubes, What is the velocity of the rocket
A slide projector needs to create a 87 cm high image of a 2.0 cm tall slide. The screen is 310 cm from the slide. Assume that it is a thin lens. How far should you place the lens from the slide
A 216-kg log is pulled up a ramp by means of a rope that isparallel to the surface of the ramp. The ramp is inclined at 32.5° with respect to the horizontal.
A vector has components x=6m and y=8m. What is its magnitude and direction
Two point charges are on the y axis. A 3.30-µC charge is located at y = 1.25 cm, and a -2.06-µC charge is located at y = ?1.80 cm. Find the total electric potential at the origin
An electron is confined in a one-dimensional box (an infinite well). Two adjacent allowed energies of the electron are 1.068 × 10-18 J and 1.352 × 10-18 J. What is the length of the box
a jogger maintains a speed of 3.2 ms for 216 m until he encounters a stoplight and he abruptly stops and waits 29 s for
How much energy can be stored in a capacitor with two parallel plates, each with an area of 64.0 cm2 and separated by a gap of 1.7 mm, filled with porcelain whose dielectric constant is 5.9, and holding equal and opposite charges of magnitude 370. ?C
A thing, rigid, spherical shell with a mass of 4.00 kg and diameter of 0.200 m is filled with helium at 0 degrees celsius and 1 atm pressure. It is after that free from rest on the bottom of a pool of water that is 4.00 m deep.
A concave shaving mirror has a radius of curvature of +39.8cm. It is positioned so that the (upright) image of a man's face is 3.48 times the size of the face. How far is the mirror from the face?
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