Answer:
can you ask clear questions I did not understand your question
Answer:
D) a Battery
Explanation:
The best real-life example of direct current is a battery. Batteries have positive and negative terminals on a battery, the electrons in the wires will begin to flow to produce a current.
Assuming that the distance from the heart to the brain is 30 centimeters, and the motion of blood in the aorta is 30 centimeters per second. There fore to solve for the time needed for the blood to reach the brain is:
t = 30 centimeters / 30 cm per second
t = 1 second.
The regular heart rate is 70 beats per minute, solve for the equivalent number of beats:
number of beats = 70 beats / minute * (1 min / 60 seconds) * 1 second
number of beats = 1.2 beats
Therefore, it takes 1.2 beats for the heart to pump blood to the brain.
Answer:
35 revolutions
Explanation:
t = Time taken
= Final angular velocity
= Initial angular velocity
= Angular acceleration
= Number of rotation
Equation of rotational motion
Number of revolutions in the 10.7 seconds is 17.13806
Number of revolutions in the 11.2 seconds is 17.36035
Total total number of revolutions in the 21.9 second interval is 17.13806+17.36035 = 34.49841 = 35 revolutions
The speed will be high than before