Reading lamp uses a 1,800-lumen lightbulb. Fatima holds her book about 3.0 meters from the lamp. What is
the illuminance (E) of the light when it hits Fatima's book?

A1000-kg weather rocket is launched straight up. the rocket motor provides a constant acceleration for 16-s, then the motor stops. the rocket altitude 20-s after launch is 510-m. you can ignore any effects of air resistance. a. what was the rocket’s acceleration during the first 16-s? b. what is the rocket’s speed as it passes through a cloud 5100-m above the ground?

Which of the following elements is in the same period as phosphorus? a. carbon c. nitrogen b. magnesium d. oxygen select the best answer from the choices provided a b c d

What is a carrier wave and how does it affect what you hear on the radio