Homework Statement
The earth's angular momentum is directed toward which celestial pole(north or south)?
Homework Equations
none
The Attempt at a Solution
I just assume that it is the south celestial pole considering that the earth is spinning from left to right, or west to east...
Homework Statement
Energy is conventionally measured in Calories as well as in joules. One Calorie in nutrition is one kilocalorie, defined as 1 kcal = 4186 J. Metabolizing 1 g of fat can release 9.00 kcal. A student decides to try to lose weight by exercising. She plans to run up and down...
1. Homework Statement
In the figure below, the man and the platform together weigh 780 N. The pulley can be modeled as frictionless. Determine how hard the man has to pull on the rope to lift himself steadily upward above the ground.
____________N
2. Homework Equations...
1. Homework Statement
The average speed of a nitrogen molecule in air is about 670 m/s, and its mass is about (4.68 x 10^-26)kg.
(a) If it takes (3.60 x 10^-13)s for a nitrogen molecule to hit a wall and rebound with the same speed but moving in an opposite direction (assumed to be the...
Homework Statement
A vector is given by R(vector) = 1.90 ihat + 1.30 jhat + 2.92 khat.
Find the magnitude of the vector
Find the angle between the vector and the x, y, and z axis
Homework Equations
I have read something about dot product but im not sure if it applies here
The Attempt at...
Homework Statement
I have a problem that is urgent and due at 12 afternoon today. I will give you the problem and i dont know if you will get it or not in time. It deals with uncertainties in mass and volume to create a specific density with a new uncertainty. Here is the problem:
The...