What two properties does all matter share?

Suppose you want to build a house on the edge of a hill that overlooks a deep valley. what measures could you take to be sure your home will not have problems due to weathering or erosion

A colloidal liquid in a has is called

What is the thinnest film of a coating with n = 1.39 on glass (n=1.52) for which destructive interference of the red component (650 nm) of an incident white light beam in air can take place by reflection?

A group of hikers hear an echo 3.3 s after they shout. The temperature is 20◦C. How far away is the mountain that reflected the sound wave? At this altitude, the speed of sound in air at 273 K is 327 m/s. Answer in units of m.

A pendulum completes 30 cycles every minute what is the period of the pendulum?

The imaginary line from the tip of the football to the football to the sideline is called

A car starting from a standstill accelerates at a rate of 4 meters per second squared. how far, in kilometers, will the car travel in 20 seconds A. 0.8km B. 800km C. 40km D. 1,600km

A small mass m on a string is rotating without friction in a circle. The string is shortened by pulling it through the axis of rotation without any external torque. What happens to the angular velocity of the object? a. It decreases. b. It increases.

Which of the following instruments is used to measure air pressure? a. thermometer b. barometer c. anemometer d. hygrometer

The speed of a nerve impulse in the human body is about 100 m/s. If you accidentally stub you toe in the dark, estimate the time it takes the nerve impulse to travel to your brain. (Assume that you are approximately 1.