Answer:
2.5 km/30min
Explanation:
Divide 5 by 2 because 30 min is half of 1 hour. when you do that you get 2.5
Answer: B. changing muscle length
Explanation:
Isometric exercise is a kind of exercise which provides strength to the body. In this exercise the muscle length and angle of the muscle do not change during the process of contraction of muscles during exercise. Several calories can be burned if the exercise is done with conscious efforts. The isometric exercise is performed in static positions, dynamic range of motions does not occur.
The answer is obviously a because a rubber band uses elastic energy
Answer:
Speed= 10meters per second, Frequency = 4hz
Explanation:
First we need to find the frequency of the wave. The formula for frequency is: f (frequency) = 1 / T (period). This means we need to convert the period into seconds and then use it as a denominator with one on the numerator.
Since the period is 0.25,
1/0.25= 4hz
Now, we just need to multiply the frequency with the wavelength
4hzx2.5= 10
= 10 meters per second
Frame of reference refers to something that is not moving with respect to an observer that can be used to detect motion.