What is the critical angle for glass which has a refractive index of n=1.6?

If the ball passes out of the field across the assistant referees and of a touchline and immediately returns to the field and play continues the assistant referee should signal by doing which of the following

You are riding in an enclosed train car moving at 90 km/h ... If you throw a baseball straight up, where will the baseball land?. In front of you ... Behind you ... In your hand ... Can't decide from the given information.

You know that a collision must be "elastic" if: a. The colliding objects stick together b. The colliding objects are stretchy or squishy c. The sum of the final kinetic energies equals the sum of the initial kinetic energies d.

You toss an apple across the room to a friend. Which of the following statements is true about the apple at the top of its trajectory?

As you are sitting in your chair the force of gravity is pulling you down. The amount of force you are applying to your chair is equal to your A. strength. B. weight. C. height. D. mass.

A 1180kg car is moving at a speed of 85.5 km/h. Find the force needed to bring the car to rest in a distance of 300m

Which best states the author's argument in catching sun rays? no power source is clean, free, and renewable. it costs too much to use solar energy for power. the use of solar energy can cause blackouts in big cities.

A possible means of space flight is to place a perfectly reflectingaluminized sheet into orbit around the Earth and then use the lightfrom the Sun to push this "solar sail." Suppose a sail of area5.

An electric circuit consists of a variable resistor connected to a source of constant potential difference. If the resistance of the resistor is doubled, then

What would happen if an electron was added to an atom