Which one of the following is an example of an indicator?

A. High concentration

B. Presence of H - ions in solution

C. Litmus paper

D. Electricity

A concave mirror has a focal length of 11 cm. What is its radius of curvature?

If you were going to build a nuclear power plant why wouldn't you build it in the middle of a desert

What is the linear diameter (in meters) of an object that has an angular diameter of 110 arcseconds and a distance of 25,000 m?

A solenoid with a ferromagnetic core is

Which is warmer - 30 degrees Celcius or - 30 degrees Fahrenheit? And how would i show my work for this question?

A 15.7-g aluminum block is warmed to 53.2 °c and plunged into an insulated beaker containing 32.5 g of water initially at 24.5 °c. the aluminum and the water are allowed to come to thermal equilibrium.

Recombination of white light can be done through glass slab

Which part of a farm system is directly improved by the use of fossil-fuel-based fertilizers? A. air quality B. water purity C. soil temperature D. nutrients and minerals

If the momentum of a 1000 kg car travelling at 10 m/s was transferred completely to a 20.0 kg traffic barrier, what would the final speed of the barrier be a. 40 m/s b. 50 m/s c. 250 m/s d. 500 m/s

2. A cannonball is fired at an angle 0 = 35° to the horizontal, with a velocity of 85 ms 1. a) What is the maximum vertical height reached by the cannonball? b) What is the maximum horizontal range of the cannonball?