Sodium-24 has a half-life of 15 hours. After 45 hours, how much sodium-24 will remain of an original 50.0-g sample?

A car designer is designing a new model of a popular car. He wants to use the same engine as in the old model, but improve th new car's acceleration. Use Newton's second law to explain how to improve the car's acceleration.

Is ecstasy dangerous to mix with alcohol? Explain.

The product of force and the amount of time the force acts on an object is called: a. inertia b. impulse c. momentum d. average force

Is light: kinetic, potential energy, either or both? Explain

Lee majors, a professional stuntman, is preparing to run off a dock and dive into a large kayak. the stuntman has a mass of 80.8kg and the kayak has a mass of 29.9kg. if lee dives horizontally with a velocity of 5.50ms ...

Why did scientists choose carbon as a base for the atomic mass unit? Which isotope of carbon did they use?

What organelle is found in all animal cells and some plant cells

Basic of Archimedes's principle of how fluid can make body to float and sink.

A bullet is accelerated down the barrel of a gun by hot gases produced in the combustion of gun powder. What is the average force (in N) exerted on a 0.0500 kg bullet to accelerate it to a speed of 625 m/s in a time of 1.10 ms (milliseconds)

Your boss at the Cut-Rate Cuckoo Clock Company wants to save money on materials. You are asked to reduce the balance wheel, which is cylindrical, dimensions to one-third their original values.