Type of lens used by watch repairers

concave or convex

According to this lesson, how many major ice ages has the earth undergone? A. 2 B. 3 C. 4 D. 5

If a flea can jump straight up to a height of 21.1 cm, what is its initial speed as it leaves the ground, neglecting air resistance?

If a car is driving down a hill at 1.5 km an hour and the hill is 3 km long how long will it take for the car to get to the bottom

How are power ratings used to describe machines?

Marcus attends a night program at an observatory to learn more about the solar system. He learns that the solar system contains many objects in addition to the palnets and the sun.

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.