What is the speed of time

The process by which planets form when material orbiting some stars starts gathering together through collision and gravitation and electrostatic attraction is called A) accretion B) nuclear fusion C) differentiation D) strong nuclear force

A very low dense concentration of energy, in which the waves are quite spread apart is a characteristic sign of an area of __?__ of a wave.

Briefly explain how an electric motor works.

What do we mean when we say that the universe is expanding?

Calculate the force of friction for a 5kg aluminum block being pulled with constant velocity (uniform motion) across a horizontal steel plank ...?

Why do responsible consumers use credit and credit cards?

According to Ptolemy's model of the movement of celestial bodies, A. the sun is the center of the universe. B. the earth rotates around the moon. C. planets orbit in circular paths around the earth. D. the earth rotates around the sun.

What is an organ that has villi to absorb the nutrients

Assume you are a Medieval knight attacking a castle with a cannon. The ball leaves the cannon with a speed of 47.7 m/s. The barrel's angle with respect to the ground is 43.

0.005 kg of copper was heated from 20°C to 80°C. How much energy was used to eat Cu? (Specific heat capacity of Cu is 385 J/kg °C)