The best and most common way to measure the intensity of a cardiovascular exercise is to determine O The person's heart rate
O The fatigue level of the person
O Amount of perspiration the person produces
The person's breathing rate

Ahorizontal wire is tied to supports at each end and vibrates in its second-overtone standing wave. the tension in the wire is 5.00 n, and the node-to-node distance in the standing wave is 6.28 cm. (a) what is the length of the wire? (b) a point at an anti- node of the standing wave on the wire travels from its maximum upward displacement to its maximum downward displacement in 8.40 ms. what is the wire's mass?

Which of the following is not a means to accelerating? question 4 options: a)increase speed b)remain still c)decrease speed d)change direction

What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?