Zirconium has an atomic number of 40. How many neutrons are there in an isotope of zirconium-92?

Which statement best explains that sound waves are pressure waves? Sound waves have regions of compressions and rarefactions. Sound waves cannot propagate through metals. Sound waves move perpendicular to the medium particles.

Tim drives to his brother Casey's house. Given the distance travelled and the time spent, what can Tim calculate about his trip? A) acceleration B) density C) force D) velocity

What date on the cosmic calendar was our sun born?

What happens to the gravitational force between two object if the mass of the objects stay the same but distance decreases?

A 160 kilogram cannon fires a 30 kilogram cannonball with a speed of 45 m/s at an angle of 30 degrees with the horizontal. In what direction and at what speed does the cannon recoil?

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?