When a force of 15 Newton's is applied to a stationary chair what can u say about the frictional force

What are nasa's four great observatories and in what parts of the electromagnetic spectrum do they observe?

Scientific evidence that the moon affects the tides more than the sun?

Newton's Second law of Motion (F = ma) is one of the basis of forces and motion. How is it very similar to his First law and why is finding the acceleration of the system (the main reason we use it) so important to solving physics and real world

A 2.1-kg brick is placed gently upon a 2.9-kg cart originally moving with a speed of 26 cm/s. determine the post-collision speed of the combination of brick and cart.

An alarm clock draws 0.5 A of a current when connected to a 120 volt circuit. Calculate its resistance

A beam of light from a monochromatic laser shines into a piece of glass. The glass has thickness L and index of refraction n=1.5.

How does the density of the Earth's core compare to the other layers of the Earth? A) The core is the densest layer. B) The core is the least dense layer. C) The core is only less dense than the crust. D) The core is only less dense than the mantle.

Who wins a tug-of-war one who pushes harder at the ground or pulls harder at the rope

Describe an experiment to show that liquids expand and contract at different rates

Which of the following is equivalent to 10 kilograms? a) 1000 grams b) 100 hectogram c) 1 hectogram d) 1000 centigrams