A sample contains 16 g of a radioactive isotope. How much radioactive isotope remains in the sample after 1 half-life?

Which statement is true for light passing into a medium that is more optically dense than the first medium through which it past

Truck traveling west on the highway experiences an acceleration to the east. what could be the cause of this acceleration

When a pendulum is held high and taut and then is released, the pendulum begins to swing. what’s the correct order of the energy transformations in this example? (pe stands for potential energy.)