What is the best alternative explanation for the dark matter in the milky way based on the observed orbital motions of stars and gas?

A force of 13 N is used to slide a 0.8 kg book across a table. What is the magnitude of the book's acceleration?

Which two layers of the atmosphere are responsible for the majority of the solar radiation absorption?

A (n) ___ forms where light seems to come from.

When a cup is placed on a table, which force prevents the cup from falling to the ground? OA gravitational force B. normal force C. resistance force tension force D.

A household fan draws 0.520 amps of current when the voltage is 120 V. How large is the resistance on the fan

The leaves of a tree lose water to the atmosphere via the process of transpiration. A particular tree loses water at the rate of 3 x 10^-8 m^3/s; this water is replenished by the upward flow of sap through vessels in the trunk.

Which of the following is evidence used to support the Big Bang Theory? background radiation increasing distances between galaxies both of the above

Which of the following statements about noncovalent bonding interactions is NOT true? Van der Waals interactions, also known as dispersion forces, are the weakest of the attractive noncovalent bonding interactions.

Does a rising GDP benefit everyone

You have a neutral balloon. What is its charge after 12000 electrons have been removed from it? The elemental charge is 1.6 * 10-19 C. Answer in units of µC.