An isotope has a half life of 2.5 minutes how many half - lives go by in 17.5 minutes

In deeper ocean water, temperature decreases and pressure increases. t/f

Mendeleevs periodic table was useful because it enabled scientists to predict properties of unknown (Blank)

The Milky Way Galaxy is moving at about 600 km/s relative to the cosmic microwave background. How does this compare to Earth's speed in its orbit and

A force of 240.0 N causes an object to accelerate at 3.2 m/s2. What is the mass of the object?

Which law says that the induced voltage is directly proportional to the magnetic field

The imaginary line from the tip of the football to the football to the sideline is called

A car starting from a standstill accelerates at a rate of 4 meters per second squared. how far, in kilometers, will the car travel in 20 seconds A. 0.8km B. 800km C. 40km D. 1,600km

A small mass m on a string is rotating without friction in a circle. The string is shortened by pulling it through the axis of rotation without any external torque. What happens to the angular velocity of the object? a. It decreases. b. It increases.

Which of the following instruments is used to measure air pressure? a. thermometer b. barometer c. anemometer d. hygrometer

The speed of a nerve impulse in the human body is about 100 m/s. If you accidentally stub you toe in the dark, estimate the time it takes the nerve impulse to travel to your brain. (Assume that you are approximately 1.