Which statement is true about alkali metals? A. Some of them explode when exposed to water. B. They are in group 18 of the periodic table. C. They are not conductors of heat or electricity. D. They are not very reactive.

How do you calculate error in refractive index (n) ?

Difference between psychoanalysis and humanism

Which describes reflection? A.) Reflected rays travel through a boundary into a new medium. B.) The angle of incidence is greater than the angle of reflection. C.) Reflected rays change direction and go back to the original medium.

Find the force necessary to start the crate moving, given that the mass of the crate is 32 kg and the coefficient of static friction between the crate and the floor is 0.55.

A car drives around a racetrack for 30 seconds. what do you need to know to calculate the average velocity of the car?

California has been spending money to establish desalination plants. The state is preparing for

What force is needed to give a 0.25-kg arrow an acceleration of 196 m/s2? A. 0.25 N B. 49 N C. 196 N D. 748 N

When two or more pure substances are blended together the result is a?

10 PTS. A resistor has a value of 2.2 x 10⁵ Ω ± 20%. What is the range of possible values for this resistor?

Describe 3 uses of radioactivity isotopes