A sample contains 24 g of a radioactive isotope. How much radioactive isotope remains in the sample after 2 half-lives?

A. 3 g

B. 6 g

C. 12 g

D. 1.5 g

According to Newton's second law of motion how much force will be required to accelerate an object at the same rate if it's mass is reduced by half?

What is the si unit for pressure?

What is the most important source of energy that our body craves more than any other?

Example of immunodeficiency disease is

A 905 kg test car travels around a 3.25 km circular track. If the magnitude of the centripetal force is 2140 N, what is the car's speed?

What is the average speed in miles per hour of the car that traveled a total of 200 miles in 5.5 hours

A solid weighs 277.5 g in air and 212.5 g when totally immersed in the liquid of density 0.9 g / cc. Calculate the density of the solid.

Who first described the double-helix structure of DNA?

Suppose you are holding a basketball while standing still on a skateboard you are and the skateboard have a mass of 50 kg you throw the basketball with a force of 10 N what is your acceleration before and after you throw the ball

Which nitrogen base sequence is the partner of C-A-T-C-G-A? O C-A-T-C-G-A O G-T-A-G-C-T OT-G-C-T-A-G O G-C-A-T-G-T TI