The focal length is the distance from the middle of the lens to the what?

Select all of the statements that are true. Each orbit holds a fixed number of electrons. The n = 1 orbit can only hold two electrons. Each orbit can hold an unlimited number of electrons. Each orbit is limited to a maximum of four electrons.

Hypothesize whether you think each of the following substances will be an acid, a base, or neutral: Bleach - Detergent - Eye drops - Lemon juice - Tea -

What is 0.0025 m^2 in cm^2? 1m = 100cm.

The wavelength (W) of a wave varies inversely as its frequency (F). A wave with a frequency of 600 kHz (kilohertz) has a length of 129 m. What is the length of a wave with a frequency of 300 kHz?

An airplane is flying in a horizontal circle at a speed of 92.1 m/s. The 55.6 kg pilot does not want his radial acceleration to exceed 8.45 g. The acceleration of gravity is 9.8 m/s². What is the minimum radius of the circular path?

How long does it take for light from a star that is 8 light years away to reach Earth? Question 7 options: 8 earth minutes 16 earth minutes 8 earth years 16 earth years

Why does water in hot springs always remain hot? Why doesn't it's thermal energy spread out?

True or false All forces are different; each exerts a particular type of effect on a object

The Yerkes refracting telescope has a 1.00 m diameter objective lens of focal length 20.0 m. Assume it is used with an eyepiece of focal length 2.50 cm. (a) Determine the angular magnification of the planet Mars through this telescope.

A small kid sits on a bike (Anita). A bigger and stronger person (Jamy) pushing the kid so that the kid starts speeding up. (neglect friction). Mark all correct statements about the forces between them. A.