A sample contains 10 g of a radioactive isotope. How much radioactive isotope will remain in the sample after 2 half-lives?

A. 7.5 g

B. 5.0 g

C. 2.5 g

D. 10.0 g

When planning a workout for muscular endurance, you'll need fewer workouts to reach your goal if you do compound exercises. a. True b. False

If the force of friction is acting on the sliding crate is 100 N how much force will be applied to maintain a constant velocity? what will the net force be acting on the crate? what will be the acceleration?

Kate gathered 3 of the same size made of different materials: glas, clear plastic, and aluminum painted black. She placed on the window sill in the sun for an hour and then measured the warmth of the air in each box.

Explain why ionic compounds are neutral even though they are made up of charged particles

Suppose you increase your walking speed from 4 m/s to 12 m/s in a period of 2 s. What is your acceleration? theres a little box for the answer and another box for units

Your university radio stawon has a 5.0-kw radio transmixer that broadcasts uniformly in all direcwons; listeners within 15 km have reliable recepwon. you want to increase the power to double that range. what should be the new power?

A projectile is thrown upward so that its distance above the ground after t seconds is h (t) equals negative 16 t squared plus 704 t. a) Find the maximum height the object reaches. b) Find the time it takes the object to reach the ground.

Whats an example of projectile motion

The fact that the sun rises and sets at different times during the day depending on the time of year is an example of a data trend. True or False

What sample of matter is a single substance