Sam is observing the velocity of a car at different times. after two hours, the velocity of the car is 50 km/h. after six hours, the velocity of the car is 54 km/h.
part a: write an equation in two variables in the standard form that can be used to describe the velocity of the car at different times. show your work and define the variables used.
part b: how can you graph the equation obtained in part a for the first six hours?

1-10. need . physics. circular motion. 35 points

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct

Question 11 of 13 (1 point) jump to question: a stairway, ladder, or ramp must be present in excavations in which of the following situations? a. all trenches must have access/egress b. the trench is more than 15 feet wide but only 1 ½ feet deep c. the trench is more than 4 feet deep and the devices must be within 25 feet of all workers