Which statement is a correct expression of the law of conservation of mass?

a.
the total mass is unpredictable in a chemical reaction.

b.
the total mass remains the same during a chemical reaction.

c.
the total mass decreases during a chemical reaction.

d.
the total mass increases in a chemical reaction.

The 10-kg double wheel with radius of gyration of 125mm about o is connected to the spring of stiffness k = 600 n/m by a cord which is wrapped securely around the inner hub. if the wheel is released from rest on the incline with the spring stretched 225 mm, calculate the maximum velocity v of its center o during the ensuing motion. the wheel rolls without slipping

Two polarizers are oriented at 24.0∘ to one another. light polarized at a 12.0-degree angle to each polarizer passes through both. what is the transmitted intensity (%)?

What part of the ear is names after tools, such as the hammer and the anvil?