Refraction occurs when a wave

a.

enters a new medium at an angle.

b.

hits a surface through which it cannot pass.

c.

moves around a barrier.

d.

interferes with another wave.

We must never touch an electrocuted person before we disconnect the circuit. Why?

Albert Jr. takes his new skateboard out to the top of the loading ramp. The ramp is 30 m long and sloped at an angle of 15 degrees relative to the horizontal. Assuming he starts from rest, and neglecting friction, about how fast is Albert Jr.

Find the conductivity of a conduit with a cross-sectional area of 0.60 cm2 and a length of 15 cm, given that its conductance G is 0.050 ohm-1. .13 ohm - 1cm - 1 .030 ohm - 1cm - 1 1.3 ohm - 1cm - 1 13 ohm - 1cm - 1

The scientific method is one application of critical thinking.

How is the temperature related to the speed of the particles

A piece of plastic tape coated with iron oxide is magnet - ized more in some parts than in others. When the tape is moved past a small coil of wire, what happens in the coil? What is a practical application of this?

As earths plates move apart at some boundaries, they collide at others, forming

Potential energy that depends on height is called a. kinetic energy. b. gravitational potential energy. c. elastic potential energy. d. mechanical energy.

A steel railroad track has a length of 40 m when the temperature is - 5 ◦C. What is the increase in the length of the rail on a hot day when the temperature is 35 ◦C? The linear expansion coefficient of steel is 11 * 10-6 (◦C) - 1.

The seasons of the Year result from Earth's movement or ___ around the Sun