It used to take Andy 4 minutes a day to blow dry his hair in the morning using a 1,875W hair dryer. How much money will he save in one 30-day month now that he no longer has to blow
dry his hair? Use the rate of electricity is $0.0783/kwh.
Question 8 (2 points)
A resistance of 79 ohms has a current of 0.13 A through it. What is the voltage of the battery in volts?
a) 10.27 volts
b) 607.7 volts

it becomes positively charged by charging it

c. newton's third law of motion

we need to know the time interval during which the force acts. impulse of force = momentum change

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s