What is the speed of sound in air when the temperature is 20°C?

319 m/s

331 m/s

343 m/s

219 m/s

What kind of diet is best for a type two diabetes person?

At the Sun Dagger in New Mexico, a dagger-shaped beam of sunlight pierces a spiral a. at sunset on the spring equinox. b. at noon on the day of the full moon each month. c. during the totality of a total solar eclipse. d.

What are three machines that depend on gravity to work

When air is warm, it rises and leaves an area of low pressure which becomes filled with sinking cold air. After a hot, sunny day, the land cools faster than the sea. What is likely to happen after a hot, sunny day on the sea shore? A.

An electron is released a short distance above earth's surface. a second electron directly below it exerts an electrostatic force on the first electron just great enough to cancel the gravitational force on it.

The forklift exerts a 1500 N force on the box and moves it 3 M forward to the stack how much work does the forklift do

In which situation would a space probe most likely experience centripetal acceleration?

Oil is less dense than water, which is less dense than syrup. If you put these three liquids in a column, in what order would they layer from top to bottom?

Rhea kicks a soccer ball at 13 km/h to Sean. After kicking the ball, the speed of the soccer ball from Rhea's reference frame is 13 km/h. The speed of the soccer ball from Sean's reference frame is 22 km/h. a.

How is using a digital signal like turning on and off a regular light switch?