A 30 kg dog runs at a speed of 15 m/s. What is the dog's kinetic energy (in jewels) ? Round the answer to two significant digits.

What is the total negative charge, in coulombs, of all the electrons in a small 0.900 g sphere of carbon? one mole of c is 12.0 g, and each atom contains 6 protons and 6 electrons?

Does the moon really change shape? Explain.

Based on the bond energies given for each of the following which is the most stable? O=O 498 kJ/mol N≡N 946 kJ/mol C=C 614 kJ/mol C=O 745 kJ/mol C≡C 839 kJ/mol

A 75.0 kg person stands on a scale in an elevator. (a) What does the scale read (in N and in kg) when the elevator is at rest?

Are longer wavelengths indicative of high or low frequency?

The Sun transfers light energy that is transformed into what kind of energy in plants?

The siren of a fire engine that is driving northward at 30.0 m/s emits a sound of frequency 2000 Hz. A truck in front of this fire engine is moving northward at 20.0 m/s.

If an atom has 34 protons and 40 neutrons, what is the mass number?

The atomic mass of an atom (in amu) is equal to Question 11 options: A. the total number of its protons, neutrons, and electrons B. the total number of electrons C. the total number of protons D. the total number of its protons and neutrons E.

12. Which of these describes the gravitational force from a planet?" O large and pulls objects toward itself small and pulls objects toward itself O small and pushes objects away from itself O large and pushes objects away from itself