Two factors that determine if two atoms will interact

What can you use to test tread wear on your tires

Why can't we breath under water?

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

A force of 100,000 N is applied to an iron bar with a cross-sectional area of 10 mm 3 20 mm and having a yield strength of 400 MPa and a tensile strength of 480 MPa.

A car is traveling at a constant velocity of 19 m/s when the driver puts on the brakes to accelerate it at - 1.4 m/s ^ 2 until stopped. How long in s) did it take the car to stop? answer must be a number only!

A motorist is traveling at 20 m/s. He is 60 m from a stoplight when he sees it turn yellow. Is reaction time, before stepping on the brake, is 0.50 s. What steady acceleration (slowing down) while braking will bring him to a stop right at the light?

Radio waves can be sent directly through the earth.

You carry a 7.0 kg bag of groceries 1.2 m above the ground at constant velocity across a 6.8 m room. How much work do you do on the bag in the process? A) 396J B) 466J C) 0.0J D) 82J

The atomic mass of potassium is 39. if its atomic number is 9, it has how many neutrons within each potassium atom?

17. Suppose you were standing on a scale in an elevator in free fall. What would the scale read? 18. Explain why the feeling weightlessness in free fall is not the same as truly being weightless. 19.