If a pulley system with an actual mechanical advantage of 2,000,000 is used in lifting a 2,000 lb. car, what effort would be needed to move the car?

3. What characteristic of ionic bonds can be used to explain the properties of ionic compounds?

If you charge a pocket comb by rubbing it with a silk scarf, how can you determine if the comb is positively or negatively charged?

A 100 kg vehicle moving at 20 m/s stops when the brakes are applied. What deceleration and braking force is required to stop it: Part A) 5 seconds Part B) 20 seconds

An isotope has a half life of 2.5 minutes how many half - lives go by in 17.5 minutes

You can increase the strength of an electromagnet's field by a. decreasing the current in the solenoid. b. decreasing the number of loops in the solenoid. c. using a stronger ferromagnetic material for the core. d. winding the coils more loosely.

Which describes a property shared by ultraviolet light and X-rays? A They are both transverse waves. B They share the same wavelength. C They contain less energy than visible light. D They both require a medium to travel through.

What is the potential energy called that is associated with objects that can be stretched

Which of the following is not a current use of radioisotopes? medical diagnosis sterilization of equipment detection of leaks in building structures light fixtures

A Blu-ray disc is approximately 11 centimeters in diameter. The drive motor of a Blu-ray player is able to rotate up to 10,000 revolutions per minute. (a) Find the maximum angular speed (in radians per second) of a Blu-ray disc as it rotates

A body has translatory motion if it moves along a