His mass is only 70.1 grams?! Check your units.Alice7979 said:70.1 g
What happened to the E23?Alice7979 said:6.022E23 * 2.765 = 1.665
Is this reasonable? A man who weighs 70.1 grams? Must be a world record...Alice7979 said:The Attempt at a Solution
a)
687/9.8=70.1 g
70.1 * .71 = 49.77 g of h20
49.77/18 u = 2.765
So does that change your answer?Alice7979 said:I forgot the formula was in kg
Yes it did, thanksharuspex said:So does that change your answer?
Always happy to have corroboration.Nathanael said:(Posted at the same time as haruspex, oops)
When it says that 71% of the runner's weight is water, it means that 71% of the total force of gravity acting on the runner is due to the water in their body. This is because water has a specific gravity of 1, meaning it has a density equal to 1 gram per cubic centimeter. Therefore, the water in the runner's body is contributing to their overall weight.
The weight of a runner is determined by measuring the force of gravity acting on their body. This can be done using a scale, which measures the downward force exerted on an object by gravity. The weight of a runner can also be calculated using the formula W = mg, where W is weight, m is mass, and g is the acceleration due to gravity (9.8 m/s^2 on Earth).
Knowing a runner's weight can have several implications, as it can affect their performance, health, and training. A runner's weight can affect their speed and endurance, as well as their risk for certain injuries. It can also be used to calculate their body mass index (BMI), which is a measure of body fatness and can help determine if they are at a healthy weight.
The weight of a runner can change during a race due to various factors such as fluid and food intake, sweating, and fatigue. As a runner sweats and loses fluids, their weight will decrease. Similarly, as they consume fluids and food during the race, their weight will increase. Additionally, as the runner expends energy and becomes fatigued, their weight may decrease slightly due to muscle fatigue and depletion of glycogen stores.
Yes, a runner's weight can affect their performance. A higher weight can make it more difficult to run long distances and maintain speed, while a lower weight can improve speed and endurance. However, it is important to note that overall fitness, nutrition, and other factors also play a significant role in a runner's performance.