A radioactive tracer has a half-life of 2 hours. How much of a 2500 g sample will be available after 24 hours?

Lymphocytes known as blastocysts make antibodies that fight infection. select the best answer from the choices provided t f

More solar radiation is absorbed by earth’s surface than by

Atriangle with equal sides of length 10 cm has -2.5-nc charged objects at each corner. part a determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. horizontally rightward vertically downward vertically upward horizontally leftward