The primary mirror in a reflecting telescope is a

plane mirror.

concave mirror.

convex mirror.

The resolution of the eye is ultimately limited by the pupil diameter. What is the smallest diameter spot the eye can produce on the retina if the pupil diameter is 3.93 mm? Assume light with a wavelength of λ = 550 nm.

A Carnot engine takes 3000 J from a reservoir at 600 K, does some work, and discards some heat to a reservoir at 300 K. What is its efficiency? 50% 60% 20% 30%

David Scott's experiment shows that all objects, regardless of their weight, fall equally in the absence of: a. The gravity b. The air c. The pressure d. The gravitational force

How does conduction occur?

How are energy, time, and power related?

According to the map, which of the following cities had both a military and a POW camp nearby?

What does uniformitarianism tell us about processes at work on Earth's surface today?

A bad case of the tonsillitis can sometimes affect a persons breathing how possible

How gravity affect time? With reference to einstein special theory of relativity

An experiment was performed on a 2-kg block. Forces of 5, 10 and 15 Newtons respectively were applied to the block for 5 seconds. Describe the difference in final speed between the three trials.