If a radioactive material has a half-life of 15 y what fraction of the material will remain after 30 y

How many shrimp do you have to eat before it makes your skin turn pink?

Which of the following best demonstrates the effect of static friction? A. A person dropping a ball to the ground. B. A person pushing a couch and it slowly sliding across a floor C. A person pushing a couch without being able to move it D.

The best four of seven games will win matches. True False in vollyball

In order to do work on an object, the force you exert must be

Similar poles of bar magnets attract each other. True False

A wave has a wavelength of 10 mm and a frequency of 5 hertz. What is its speed? a. 50 mm/s b. 50 hertz's c. 2 mms d. 0 0.50 mms

Suppose you illuminate two thin slits by monochromatic coherent light in air and find that they produce their first interference minima at / pm 35.09 degrees on either side of the central bright spot.

Tala wants to create a sound echo. She can create the echo using a pane of glass or a carpet square. Which one does she choose? Explain.

a the average distance from the Sun to Pluto is approximately 6.10 x 1 0 ^9. how long does it take light from the sun to reach Pluto?

A 25kg object moves from left to right at a speed of 30km/h. What net force is required to keep this object moving in a straight line at constant speed