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?

Velocity is equal to and it's unit is

For motion maps that illustrate accelerated motion, what does a new level indicate? A. change in acceleration or direction B. increased velocity C. decreased velocity

What is the energy equivalent of an object with a mass of 1.05 g? 3.15 * 105 J 3.15 * 108 J 9.45 * 1013 J 9.45 * 1016 J

Calculate the molecular weight of a polyethylene molecule with n=750. Express your answer to three significant figures.

The average salinity of sea water is A. 3% B. 3.5% C. 2.5% D. 2%

What was his average swimming speed during the second half of the race if he tied the record, which was at an average speed of 2.05 m/s?

Objects A and B have equal amounts volumes and are both traveling at 25 miles per hour. Object A is much denser than Object B. Which object has a greater amount of force and why

An airplane with a total mass of 850 kg has an engine malfunction, causing it to provide a constant horizontal force of 4000 N. The pilot, who has a mass of 80 kg, decides to eject from the airplane.

When less force is used but the amount of work done remains the same, how does distance change? A) distance stays the same B) distance increased C) distance decreased D) distance is dependent on the mass of the object

A student pushes a 60-N block across the floor for a distance of 10 m. How much work was done to move the block