In what direction does friction always act?

An arrow is shot vertically upward at a velocity of 50.0 m/s. what was its velocity after 2.00 seconds?

Why are there so many craters on the Moon and so few on Earth?

To get copper from the solid phase to the liquid phase must of the copper sample

The density of water at 0ºC is very nearly 1000kg/m3 (it is actually 999.84 kg/m3), whereas the density of ice at 0ºC is 917 kg/m3.

Olivia put a glass of water in the freezer. She left it there for three hours. When she returned, the water had turned to ice.

Which of the following best describes the ultraviolet catastrophe of blackbody radiation? A. As energy is added to an object acting as a blackbody radiator, its emissions move to the ultraviolet part of the electromagnetic spectrum. B.

Is an engine-activated booster unit that reduces the effort required to apply the hydraulic brakes

A box is lowered using a rope. If the acceleration of the box, is 2.5 m/s2 (downward) and the tension in the rope is 31 N, what is the mass of the box (in kg) ?

On a very hot summer day, the rooms on the first floor of a house stay cooler than the rooms on the second. Which form of thermal energy flow causes this to occur? A) Conduction B) Convection C) Kinetic D) Radiation

What is a ion in science?