In a fluorescent tube of diameter 3 cm, 3 times 1018 electrons and 0.75 times 1018 positive ions (with a charge of + e) flow through a cross-sectional area each second. What is the current in the tube?

If you throw a baseball while riding a bike, the ball's speed relative to the ground is the sum of the bicycle's speed and the speed at which you threw the ball. True or false?

Which sphere of Earth includes the continental ice sheets and glaciers? Biosphere Cryosphere Geosphere Hydrosphere

A traditional unit of length in Japan is the ken (1 ken 1.97 m). What are the ratios of (a) square kens to square meters and (b) cubic kens to cubic meters? What is the volume of a cylindrical water tank of height 5.50 ken

What is density? a. the amount of matter in a given volume b. the force of attraction between two objects having mass c. the mass of an object multiplied by the force of attraction acting upon it d. the measure of how much matter is in an object

In the water cycle, water vapor evaporates into the atmosphere and forms clouds through condensation. What happens in the atmosphere to the water in order for the clouds to form? A) Water drops mix with air pollution to form clouds.

Calculate the gravitational potential energy of a 10kg box on the top shelf of a closet, 2m above the floor

In late adulthood, changes in memory may bot be inevitable however, any decline in memory tends to invite

On october 15, 2001, a planet was discovered orbiting around the star hd 68988. its orbital distance was measured to be 10.5 million kilometers from the center of the star, and its orbital period was estimated at 6.3 days.

A container of rocks with a mass of 65.0 kilograms is brought back from the moon's surface where the acceleration due to gravity is 1.62 meters per second2. what is the weight of the container of rocks on earth's surface?

A curved, transparent object used to refract light