Physics, 25.10.2020 08:20 quanyacoles124
Read the students notes very carefully and write a complete materials list for the investigation. This investigation was about pulse rate we checked or pulse rates when we were resting and during different kinds of exercise. I thought that exercise would make our pulse rates increase. We used to watch with a second hand time ourselves when we measured our pulse rates. We measured our pulse for 15 seconds. We can use this measurement to calculate pulse rates per minute. We also check the pulse five minutes after exercise. We wanted to see if our pulse rates returned to the resting level. We will need to do calculations in order to convert these results to pulse rate per minute. These results should allow us to see the effect of exercise on our pulse rates. While we were investigating, we noticed that there are differences between our pulse rates. We wonder how much variation there is among all the students in our class.
Answers: 2
Physics, 21.06.2019 18:30
A10.0 kg cart and a 15kg cart are locked together with a compressed spring between them. they are then released so that the spring pushes the two carts apart. the 10.0 kg cart is moving at 4.5 m/s afterward. how fast is the 15kg cart moving? 3.0 m/s 2.0 m/s 4.5 m/s 5.0 m/s
Answers: 1
Physics, 22.06.2019 08:40
Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?
Answers: 1
Physics, 22.06.2019 13:10
The atoms in a nickel crystal vibrate as harmonic oscillators with an angular frequency of 2.3 × 1013 rad/s. the mass of a nickel atom is 9.75 × 10-26 kg. what is the difference in energy between adjacent vibrational energy levels of nickel? (h = 6.626 × 10-34 j • s, , 1 ev = 1.60 × 10-19 j)
Answers: 2
Read the students notes very carefully and write a complete materials list for the investigation.
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