Answer:
Explanation:see attachment for answers and calculations
If we consider all energy losses due to bearing friction and aerodynamic resistance as negligible, then the energy from the maximum potential energy and the zero kinetic energy will be preserved.
Given this assumption, the energy of the pendulum at the highest point (maximum potential energy) and the lowest point (zero kinetic energy) is equal.
Therefore,the lowest point = the highest point = 573 J.
The answer is 573 J.
The turns ratio is the factor that determines voltage andcurrent. In order to have the same current across the resistorin the primary as the resistor in the secondary, then:--N(p) = Primary turnsN(s) = Secondary turnsR(2) = Primary resistorR(1) = Secondary resistor--R(2)/R(1) = N(p)/N(s)R(2) = R(1)*(N(p)/N(s))--If arbitrary values are plugged in, you will see that this step up transformer will require 2x the resistance required in the secondary, R(1), to obtain the same current. Thus R(2) will be 1/2 the value of R(1). This is due to the stepped up voltage in the secondary.
Answer:
B
Explanation:
graph b shows a steady pace of movement for 20 minutes and then shows a plateau in the distance, showing that while time keeps moving (obviously), the distance doesn't change. then after 5 minutes, the student gets up and starts running again. hope this helped!
