Which term describes the number of protons in one atom of an element

A scientist spends most of his time observing the night time sky and tracking the orbits of planets. Which branch of physical science is he most likely studying?

A planet orbits a star, in a year of length 2.35 x 107 s, in a nearly circular orbit of radius 3.49 x 1011 m.

Inside a spinnet, the hammer is sometimes set to strike multiple strings to increase the instrument's volume.

How was the planet neptune discovered?

A 1.5m wire carries a 8 A current when a potential difference of 78 V is applied. What is the resistance of the wire? Your Answer: Question 17 options: Answer: units:

How much would a 100kg man weigh on the surface of the sun where the acceleration is 274 m/s

How much current is in a circuit that includes a 9 - volt battery and a bulb with a resistance of 12 ohms?

Find the current Voltage VD and current ID in the following circuit assuming (a) ideal diode. (b) Constant voltage drop model with Von = 0.75V (c) using the exponential model (I_0=1*10^ (-14)). Verify your results through Multisim simulation

Suppose two stars are located in region a of the h-r diagram shown in the figure below. Star X appears much dimmer that Star Y as seen from Earth. Which Star can be inferred to be nearer to Earth, and how do you know?

A student examining a joint observes collagen-rich connective tissue fibers linking the bones, but finds no synovial cavity. Which structural classification fits the observed joint?