A number has a atomic number of 9 and an atomic mass of 19 amu. how many protons and how many neutrons are present in the atom

Does a source moving affects light?

Where did the elements in our solar system come from? they condensed out of hot gas clouds surrounding the early sun. they were accreted from other solar systems. they were transformed from helium and hydrogen by the solar furnace?

What is the leading hypothesis for the origin of short gamma-ray bursts?

When one continental plate slides beneath another A. weathering and erosion work to build high plateaus and mountain ranges. B. the process of melting returns material to the Earth's surface. C.

It take a car 3hour to travel 300kilometers

Jill is getting ready to push little Frank in his swing. She pulls Frank back as high as she can and then releases the swing. What is the initial transfer of energy that accelerates the swing when she lets go?

Which phenomenon generates electric current? A black body radiation B ultraviolet catastrophe C emission spectra D photoelectric effect

What is the product of 3.15 m and 2.006 m with the correct number of significant figures?

Consider what happens at the moment when the block leaves the surface of the globe. Which of the following statements are correct? - The net acceleration of the block is directed straight down.

A mechanic pushes a 3.00 ✕ 103-kg car from rest to a speed of v, doing 4,680 j of work in the process. during this time, the car moves 26.0 m. neglecting friction between car and road, find v and the horizontal force exerted on the car.