A wire of length 5cm is heated from a temperature of 20c to 70°C if it undergoes a change
in lengte 2cm. Calculate
the linear expans of the wire

20. threshold braking in the vehicle's braking system occurs when a. the brake pedal is pushed, heel on floorboard, with full foot pressure. b. the brakes are exerting full braking power, without traction loss. c. the driver begins pushing down the brake pedal, with moderate slowdown. d. the brakes just begin to take hold with a gradual slowdown.

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

What is the energy of a photon of ultraviolet radiation with a frequency of 4.4 × 1015 hz? planck’s constant is 6.63 × 10–34