At a given instant in time, a 18-kg rock is observed to be falling with an acceleration of 7.75 m/s2. What is the magnitude and direction of the gravitational force on the rock?

A concave mirror is used as a reflector ina torch light?

A certain copper wire has a resistance of 10.5 ω. at what fraction of the length l must the wire be cut so that the resistance of one piece is 9.0 times the resistance of the other?

Part b suppose the magnitude of the gravitational force between two spherical objects is 2000 n when they are 100 km apart.

Seesaw is an example of what knid of simple machines

What is the material conditional. The subject is philosophy

Which statement about ammeters and voltmeters is true? A. Current and voltage are the same throughout a circuit so where you place the ammeter and voltmeter doesn't matter. B.

Teens realize that things may be "shades of gray" after they enter Piaget's social stage. identity crisis stage. menarche stage. formal operational stage.

Technician A says that fractured rods have a unique mating surface and that only the cap that was fractured is the one that will fit that rod. Technician B says that a powdered metal rod is less expensive, lighter, and as strong as a forged rod.

What is the expected wavelength (in cm) of 10.5 ghz microwaves in free space?

There are 5,280 feet in 1 mile and 12 inches in one foot. How many inches are in a mile?