If calcium lost two electrons it would have the same number of electrons as

Green light of a certain wavelength is incident upon two valors separated by 2.10 x 10^-5 m. A screen is placed. 800m from the slits. The distance from the central bright line to the first-order line is 19.9 mm. What's the wavelength of the light?

Which statement best describes the thermal properties of wool? A. Wool is an ideal thermal insulator because it completely resists the transfer of heat. B. Wool is an excellent thermal conductor because heat flows through it very quickly. C.

What is the SI unit for intensity? A. Joule B. Watt C. Decibel

Which of the following statements is true? A. Pressure flattened the solar nebula into a disk and as it contracted its rotation rate decreased. B. Pressure flattened the solar nebula into a disk and as it contracted its rotation rate increased. C.

Q2. Quantities in physics are either scalars or vectors. (a) Use the correct answers from the box to complete the sentence. acceleration direction distance speed time Velocity is _in a given

When considering different hypothesis usually the scientific explanation which can account for all the is

Similarities between mechanical and electromagnetic waves are

Suppose you're given the formula r = s 2t. if you know that s is three times greater than t, how could you rewrite the formula

A merry-go-round rotates with a centripetal acceleration of 15 m/s2. If the outer horses are 7 m from the center of the ride, what is their velocity? O A. 11.8 m/s O B. 10.2 m/s O O C. 9.6 m/s D. 8.4 m/s

Which is not a part of the walking mechanism of the human body? a rigid bar a fulcrum a resistance a gear