An atom of element A has 39 protons. What would the element's atomic number be?

The Earth orbiting the Sun is an example of circular motion. What is the name of the force involved?

Which of the following is a displacement? a. 5 m/s c. - 0.7 m/s2 b. 10 ft d. 3 blocks east

This exists in the space surrounding a charged particle and exerts a force on other charged particles.

You are designing a flash camera and wish to store 3j of energy in a capacitor to power the flashbulb. the circuitry of the camera will produce an emf of 200v to charge the capacitor. what size capacitor should you use to store the required energy?

What does it mean for data to be reproducible? how would you conduct an experiment in such a way as to get data reproducible?

An element's atomic number is 38. How many protons would an atom of this element have?

What's are some forms of chemical energy

True or false a liquid does not have a definite shape, but it does have a definite volume.

HOw are ferns and trees alike and different and what would survive longer without rain fern or tree

1. Using Pj = e^-BE/Z in the Gibb's form for the entropy, show that F = kb Tln (Z), where F = U - TS is the Helmholtz free energy. Here Z= e^-BE is the canonical partition function ...