A sample of plutonium-239 decays to one-eighth of its original amount after 7.236 x 104 years. What is its half-life?

Which describes the attraction or repulsion caused by magnets? a. magnetic domain b. magnetic force c. magnetic field

An airplane flies from Morocco to France. The trip takes two hours and 15 minutes. If the plane flies at a constant speed of 500 miles per hour, how far is it from Morocco to France? Choose the closest answer.

The ability to transfer energy explosively into force is

You may make the following measurements of an object 42kg and 22m3. What would the objects density be?

Two forces, 80 N and 100 N, acting at an angle of 60 ° with each other, pull on an object. (a) What single force would replace the two forces? (b) What single force (called the equilibrant) would balance the two forces? Solve algebraically.

A glass window is a clear object that light passes through as it travels in a straight line. This is a good example of A. refraction of light. B. transmission of light. C. absorption of light. D. reflection of light.

Why is net force a vector sum A. All forces have direction and magnitude B. Forces can only be attractive C. All forces are contact forces D. There are four fundamental forces

Does the elf owl's small size allow it to live in cacti

If grapefruit juice has a ph of 3.0 and egg white have a ph of 8.0, which contains more h + ions? how many more?

Consider a single photon with a wavelength of λ, a frequency of ν, and an energy of e. What is the wavelength,? Consider a single photon with a wavelength of λ, a frequency of ν, and an energy of e.