When an atom is in excited state emits a photon of radiation, the energy of the photon is equal to the?

Josh calculated that the speed of his balloon travelling a distance of 10m was 2m/s. What was the length of time?

What is the comet's tail made of?

Match each number to how it would appear in scientific notation. A. 2,500 2.5 * 10-1 B. 25 2.5 * 10-3 C. 0.0025 2.5 * 103 D. 0.25 2.5 * 101

What best describes a SONAR wave? a. transverse and electromagnetic b. transverse and mechanical c. longitudinal and electromagnetic d. longitudinal and mechanical

Which body system processes into a useable source of energy

In a laboratory experiment, a diffraction grating produces an interference pattern on a screen. If the number of slits in (including the slit spacing) the same, then The fringes stay the same brightness and get closer together.

The gravitational potential has a zero value gravitational field in the same place is? Maximum or null indeterminate

In four-seater countries, temperature drops below 0 ° C during peak winter. Why only the frozen surface of the water instead of the whole river and the lake freezes?

Which type of circuit is more useful and why

how much current is in a circuit that includes a 9-volt battery and a bulb with a resistance of 3 ohms?