Why is a shopping bag of feathers lighter than a shopping bag of nails?

Examples of main themes from edwards sermon

Albert pushes a 12-kg box across a level floor. he pushes with a force of 49 newtons, and observes that the box accelerates in the direction of his push at a rate of 3 m/s2. what must be the net force acting on the box?

A truck is moving around a circular curve at a uniform velocity of 13 m/s. If the centripetal force on the truck is 3300 N and the mass of the truck is 1600 kg, what's the radius of the curve?

A sound wave has a frequency of 1,395 Hertz. All sound waves in air travel at 343 m/s. Find the wavelength of the sound wave. what's the answer?

Similarity between mass and charge

When an electron moves from a lower to a higher energy level

Which of the following is all matter made of? A. Hot particles B. Cold particles C. Constantly moving particles D. Nonmoving particles

Which of the following has longest wavelength, a) blue light b) red light c) x-rays d) gamma rays?

are the properties of a specific element the same as the properties of a molecule made up of that element? why or why not

In what circumstance is displacement the same as distance traveled?