Which subatomic particle has a positive charge?

A) electron

B) neutron

C) nucleus

D) proton

Causes cold nutrient rich waters to move up to the oceans surface

Which instrument is used to measure air pressure? a. isometer b. barometer c. hydrometer d. pressometer

True or false a magnet is never found in nature

What is the tube that carries air inside a lung?

Which of the following statements are true concerning stable nuclei? Check all that apply. There is no limit to the size of a stable nucleus because of the great strength of the strong nuclear force.

Suppose s (t) is the position of an object moving along a line at time t is greater than or equal to 0. What is the average velocity between the times t=a and t=b? What is the instantaneous velocity at t=a?

Estimate how long it would take one person to mow a football field using an ordinary home lawn mower. suppose that the mower moves with a 1-km/h speed, has a 0.5-m width, and a field is 360 ft long and 160 ft wide. 1 m = 3.281 ft.

Badri makes the table below to review the factors that affect the electric force between objects. Which change will correct the error in Badri's table?

A star with the same mass of the sun has a newly discovered planet whose semi-major axis of 2.48 au and an eccentricity of 0.08. what is the aphelion distance of the new planet

A weather balloon is inflated to a volume of 2.2 x 10^3 L with 374 g of helium. What is the density of helium in grams per liter?