The .179 pa on the first problem was a typo. So for the first problem i don't simply use density = mass/volume? I don't believe I know what the displacement will be do I? I only know the mass of the objects, the density of helium and the density of air. So how should I set up my equation?
Here are a couple problems I would like to check and a couple I'm not sure how to do:
1.3)A 650kg weather balloon is designed to lift a 4600kg package. What volume should the balloon have after being inflated with helium at 0C and 1 atm pressure to lift the total load?
Density of helium =...
If the hypotenuse was 5m, then the answer would be 120J. If the length of the base was 5.0m, the answer would be 150J, no a possible choice. If the Height was 5.0m, the answer would be 200J, nota possible choice.
68.) The angle between the force of gravity and the surface the child is...
Here are some problems that I have figured out. Am I doing them right?
47.) A trapeze artist weighs 800N. The artist is momentarily held to one sid of a swing by a partner so that both of the swing ropes are at an angle of 30.0 degrees with the vertical. In such a condition of static...
I tried to set the mass of the crate to 100kg. After drawing a force diagram, I'm not sure I am doing it right. Force Normal and the Force of Gravity should equal one another. If Net Force = Mass * Acceleration, and the mass is 100kg*-3.92 m/s, you get a negative net force of -392 N. 392...
In this section, I am trying to determine frictional forces between surfaces and masses. However, in this type of problem, no masses are given. Here is a type of question:
A crate is carried in a pickup truck traveling horizontally at 15.0 m/s. The truck applies the brakes for a distance...