In a hydrogen atom in its ground state, the electron is on average a distance of about 1*10-10 m from the proton. What is the magnitude of the electric field due to the proton a distance of 0.9 ✕ 10-10 m away?

What is the frequency of a radio wave with an energy of 3.686 * 10-24 j/photon? answer in units of hz?

The escape velocity of a bullet from the surface of planet Y is 1919.0 m/s. Calculate the escape velocity from the surface of the planet X if the mass of planet X is 1.37 times that of Y, and its radius is 0.935 times the radius of Y

Is the following sentence true or false? In the modern periodic table, elements are arranged by increasing number of protons

6. Your friend is going 30 mph, when she slams on the brakes. If you are not wearing a safety belt. Which way does your body move? How fast will you be going when you slam into the windshield? Explain why you move this way in terms your inertia.

Describe an experiment to show that heat causes change in the state of a body.

Which of the following jobs does not require good swimming ability

An object has an emissivity of 0.725. At temperature T, it radicates heat at a rate of 10 W. What is its rate of heat radiation at temperature 2 T

Which of the following is an instance of persuasive speaking? a. a coach reviewing the offensive plays for next week's game b. a lawyer explaining the details of a plea bargaining agreement to her client. c.

What is needed to support life

What property indicates a star's temperature? A size B color C composition D brightness i forgot lol