If a radioactive material has 1 hour half life, how much of a 1000 g sample will be left after 6 hours

Which type mixture looks like it is one substance a. A heterogeneous one b. A suspension c. A colloid d. A homogeneous one

What is the function of pupil?

How many steps occur in human digestion?

Balanced chemical equations show that there are the same numbers of atoms in the reactants side of a chemical equation as on the products side. True False

Zinc metal reacts with HCl as follows: Zn + 2 HCl ⇒ ZnCl2 + H2 What mass of zinc metal is needed to produce 600.0 mL of hydrogen gas collected over water at 30.0°C and at 775 mmHg?

What is the relationship between gravity and mass? What is the relationship between gravity and distance?

A person performs 300 j of work over the course of 60 seconds how much power they did required

If you have a 90 V power source with a 30-Ω and 60-Ω resistor in series, what is the voltage drop over the 60-Ω resistor? 30 V 2 V 60 V 90 V

How is thermal energy transferred during convection?

What is the purpose of a free body diagram? A. to show the velocity of an object B. to show the acceleration of an object C. to show the forces acting on an object D. to show the direction of motion vectors of an object