What is a type of pulley that increases the size and effort of force

Even though the hubble law for galactic motions indicates that the spectra of all galaxies should show redshift as a consequence of the general expansion of the universe, the andromeda galaxy m31 appears to show a blueshift in its spectrum.

The acceleration of high-speed aircraft is sometimes expressed in g's (in multiples of the standard acceleration of gravity). Determine the upward force, in N, that a 78.03-kg person would experience in an aircraft whose acceleration is 5.05 g's.

The gravitational attraction between a large object and a small object is ... A). Greater than the attraction between two small objects the same distance apart B). Less than the attraction between two small objects the same distance apart C).

A 0.25-kg ball sits on the roof of a building that is 10 meters tall. Find the GPE. (Gravity = 9.8 on Earth)

Why will a set of stars appear at a different angle to us at different times of the year? A. because we change location as Earth orbits the sun B. because the stars move back and forth across the sky C. because of distortions by gravity ... ?

Marina is using a metal spoon to stir her soup. Why does the soup feel warm? Marina's hand warms the spoon she is holding heat energy from the soup is transferred to the spoon heat energy from the spoon is transferred to the soup

A 1180kg car is moving at a speed of 85.5 km/h. Find the force needed to bring the car to rest in a distance of 300m

Which best states the author's argument in catching sun rays? no power source is clean, free, and renewable. it costs too much to use solar energy for power. the use of solar energy can cause blackouts in big cities.

A possible means of space flight is to place a perfectly reflectingaluminized sheet into orbit around the Earth and then use the lightfrom the Sun to push this "solar sail." Suppose a sail of area5.

An electric circuit consists of a variable resistor connected to a source of constant potential difference. If the resistance of the resistor is doubled, then