What is a cosmic microwave background

If you needed to find the force needed to pull a small car up a ramp it would be best to use - A. A spring scale B. An electronic balance C. A triple beam balance D. A formula

A 50 g ball of clay traveling at speed v0 hits and sticks to a 1.0 kg block sitting at rest on a frictionless surface. part a what is the speed of the block after the collision?

What three machines or devices depend of gravity to work?

When a car accelerates gradually (no squealing tires), is the friction between tires and road kinetic or static? When a car accelerates gradually (no squealing tires), is the friction between tires and road kinetic or static?

On a cool morning, Uyen's breath can form a cloud when she breathes out. Which changes of state are most responsible for Uyen seeing her breath in this way?

wavelength of a light whose second-order dark band forms a diffraction angle of 15.0° when it passes through a diffraction grating that has 250.0 lines per mm

If a fully loaded shopping cart has a head-on collision with an empty cart both moving at the same speed toward each other, which cart experiences the greater force? The greater impulse? The greater change in momentum? The greater acceleration?

Why didn't early Portuguese and Dutch explorers decide to create settlements in Australia

How do the electrons in the bulb's filament, far from the battery and its emf, "know" that they should flow?

What occurs when an unstable atomic nucleus changes into other nuclei by emitting particles and energy