An astronomical telescope has its two lenses spaced 82.1 cmcm apart. If the objective lens has a focal length of 78.0 cmcm, what is the magnification of this telescope

If only conductive heat loss was significant for a house, then by what percentage would you lower the heat loss if the temperature was reduced inside from 70 F to 60 F when the outside temperature is 20 F?

A rope of negligible mass passes over a uniform cylindrical pulley of 1.50 kg mass and 0.090 m radius. The bearings of the pulley have negligible friction, and the rope does not slip on the pulley. On one end of the rope hangs a 3.

A spoonful of oil has poor solubility in water. Would a cup of oil dissolve into water?

Which statement best describes comparative and descriptive investigations? They both include a question, procedure and conclusion. They both include a hypothesis. They both require a specified control group.

Which is an example of something heated by conduction

A 7700-kg box car traveling at 14 m/s strikes a second car at rest. The two stick together and move off with a speed of 5.0 m/s. What is the mass of the second car?

What will happen if there is a change in a magnetic field?

Question 2 10 pts The voltage in a particular circuit is 10.0 V. The current in the circuit is 20 A. What is the resistance? A. 2.0 B. 30 C. 200 D. 0.5

Where in the motion is the magnitude of the net force on the object a maximum? where in the motion is the speed a maximum?

Which movies are longer than 2 hours?