Does a good insulator prevent energy from getting through it, or slow its passage

The y component of the electric field of an electromagnetic wave traveling in the + x direction through vacuum obeys the equation Ey = (375 N/C) cos[kx - (2.20 * 1014 rad/s) t]. What is the wavelength of this electromagnetic wave? (c = 3.

Which of the following statements about diffusion is true? "1. It requires integral proteins in the cell membrane. 2. It is very rapid over long distances. 3.

Why do (either positively or negatively) charged balloons (an insulator) hang on a wall (which is also an insulator) if the wall is neutral?

1. After collecting data, Ron determined that balance he was using was miscalibrated. What sort bias has he inadvertently introduced into the results? design bias measurement bias procedural bias 2.

A student had a sample of pure water, and added an unknown substance to it. the student noticed that the hydroxide ion concentration in the solution increased as the substance was added. what is true about this newly formed solution?

For resonance to occur, the object must experience a frequency equal to its what? amplitude period wavelength natural frequency

Rasheed runs a football 10 meters east, turns and runs the football 6 meters west. If his velocity during this run is found to be 3 meters/second, how long does this take Rasheed to complete this run?

What is the approximate weight of a 20-kg cannonball on the moon if the acceleration due to gravity is 1.6m/s^2

A man consumes 2245 kcal of food in one day, converting most of it to maintain body temperature. If he loses half this energy by evaporating water (through breathing and sweating), how many kilograms of water evaporate?

If an eagle and a bumblebee are traveling at 8km/hr which has more momentum?