A pair of scissors is a complex machine. What are the simple machines you need, to make a pair of scissors?

What can you assume has happened if an electron moves to a higher energy level? A) the atom has become more stable B) the electron has lost energy C) the electron has gain energy D) the atom has lost an electron

In a compression wave, particles in the medium move a. perpendicular to the direction of the wave c. in the same direction as the wave b. opposite of the direction of the wave d. in depends upon state of the medium

We observe that a moving charged particle experiences no magnetic force. from this we can definitely conclude that

Why is hydrogen placed on the left side of the periodic table even though it is a gas

A random sample of size 16 is drawn from a nor - mal distribution having σ = 6.0 for the purpose of test - ing H0: µ = 30 versus H1: µ = 30.

A golf ball is hit with an initial velocity of 155 ft/s at an angle of 23 degrees with the horizontal. After 1.4 seconds, how far has the golf ball traveled horizontally and vertically?. a. 199.7 feet horizontally and 75.2 feet vertically. b. 60.

What is the kinetic energy (in joules) of a. 2 kg softball thrown at a speed of 40 m/sec? (answer should be in correct units)

How is the information sent back to earth by the robots?

During which change of state do atoms lose energy? sublimation freezing boiling melting

Why does the rotation of earth require people to establish times zones?