Which of the following is a true statement about virtual images?

you cannot see a virtual image.
a virtual image must be larger than the object.
a virtual image is formed at the position from which the rays appear to have originated.
a virtual image must be upside down.

Aforce of 100 newtons is used to move an object a distance of 15 meters with a power of 50 watts. find the work dine and the time it takes to do the work

How much energy is supplied to each coulomb of charge that flows through a 12-v battery?

The brightest star in the night sky in the northern hemisphere is sirius. its distance from earth is estimated to be 8.7 light years. a light year is the distance light travels in one year. light travels at a speed of 3.00 × 108 m/s. calculate the distance from earth to sirius in miles. (1 mi = 5280 ft) g