Using Hooke's law, F s p r i n g = k delta x, find the force needed to stretch a spring 2 cm if it has an elastic constant of 3/Ncm

A:2/3 N

B:3/2N

C:3N

D:6N

Bohr's model is the most accurate model of the atom.

A superhero swings a magic hammer over her head in a horizontal plane. The end of the hammer moves around a circular path of radius 1.50 m at an angular speed of 6.00 rad/s.

What motivates you to learn physics?

All cells have a protective barrier that is formed of proteins and a lipid bilayer. what is the name of this barrier?

Which of the following is a tool used for separating the different color wavelengths from each other? a. telescopes b. microscopes c. stethoscopes d. spectroscopes

A 111.6 g sample of iron was heated from 0°C to 20°C. It absorbed 1004 J of energy. What is the specific heat capacity of iron?

A car is driving towards a brick wall at a constant velocity (don't try this at home!) and the driver honks the horn of the car. the sound of the horn reflects from the wall and the echo is heard by the driver.

Mass number of an atom with 11 protons

Which of the following elements is the most reactive? Beryllium Calcium Magnesium Barium

A flash of white light containing all the colors of the visible spectrum in air shines straight down on the surface of a pool.