If you have to apply 40 N of force to a crowbar to lift a rock that weighs 400 N, what is the actual mechanical advantage of the crowbar?

The LaTeX: yy-component of the electric field of an electromagnetic wave traveling in the LaTeX: + x + x-direction through vacuum obeys the equation LaTeX: E_y = (375/; {/rm N/C}) / cos[kx - (2.

Explain the difference between strength, muscular endurance and power

What is the name of the atomic model in which electrons are treated as waves

The volume of a substance must be measured several times during an experiment. Which units should be used to measure the volume of the substance? centimeters milligrams kelvins liters

According to Ohm's law, resistance is the ratio of voltage to current. True or False?

At distances greater than 2 femtometers, the nuclear strong force is stronger than (select all that apply): gravity electromagnetic forces nuclear weak force none of the above

Identifying the Functions of Parts of the Ear Which part of the ear changes sound to a signal that the brain can understand? Which part of the ear carries the signal to the brain?

Which tool would a scientist use to find the mass of an object?

Who are the launched dog on moon A. mark B. lyca C. mcmc D. seul

The excerpt is from an article that Roberto read for science class called "Using the Scientific Method to Study Tomatoes." The student performed an experiment to test his hypothesis about sunlight and plant height using two plants.