How many days will it take for one half of the original amount of a radioactive substance to decay if the half-life is 30 days?

a. 3 days

b. 15 days

c. 30 days

d. 60 days

Which biome is home to half of earth's species? a. tropical rain forest b. taiga c. temperate deciduous forest d. grassland

What happens to resistance and current when more loads are added to a parallel circuit? A - Resistance decreases and current increases. B - Resistance and current are unaffected. C-Resistance increases and current increases.

What is the minimum speed the rock must have at the top of the circle if it is to always stay in contact with the bottom of the bucket?

A hard material is easily scratched. a. True b. False

To analyze the motion of a body that is traveling along a curved path, to determine the body's acceleration, velocity, and position. A motorcyclist travels around a curved path that has a radius of 250 ft.

Which best explains the relationship between the speed of sound and the medium through which it passes?

g The magnetic force on a charged particle A. depends on the sign of the charge on the particle. B. depends on the velocity of the particle. C. depends on the magnetic field at the particle's instantaneous position. D.

How fast must a 1000 kg car be moving to have a kinetic energy of 1.0 kWh

Which of the following is used to measure weight? Newtons Liters Kilograms Meters

Intravenous infusions are often made under gravity. At what height should the bottle be placed so the liquid pressure is 700 mm-H2O?