4.2.5 Quiz: Time for Anaerobics Question 2 of 5
During an anaerobic burst of exercise, what percentage of a person's
maximum heart rate should be reached?
A. 60-70%
B. 80-90%
C. 70-80%
D. 90-100%
UBMIT
The answer should be D 90-100%

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

which three statements are true about all alloys?

an electric circuit

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it