When water waves approach an obstacle such as the supports holding up a pier, they will bend around the supports. This wave phenomenon is called

a. reflection.

b. refraction.

c. diffraction.

d. polarization.

An upward force of 27.5 n is applied to a string to lift a ball with a mass of 2.5 kg. a. what is the net force acting upon the ball

According to Newton's first law, an object in motion will stay in motion unless:

Technician A says that a crankshaft determines the stroke of an engine. Technician B says that the length of the connection rod determines the stroke of an engine. Which technician is correct? A. A only B. B only C. Both D. Neither

A 1000-kg car approaches an intersection traveling north at 20.0 m/s. A 1200-kg car approaches the same intersection traveling east at 22.0 m/s. The two cars collide at the intersection and lock together.

A steel bar that is at 10 ° c is 5 meters long, a bar for heated to 120 ° c, how long is that bar? Α = 1.2.10 - ° c 2) A square plate has 50cm side at 40 ° c knowing that α = 1,5-10-⁷ ° c¹ to determine: A) the surface expansion coefficient β (β = 2.

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