An object is dropped from the top of a 200 m tower. its height above the ground after t seconds is 200 - 4.9t^2. how fast falling after 3 seconds

What is most likely to happen to light that hits an opaque object? A. All of the light passes through the object. B. None of the light passes through the object. C. Most of the light disappears. D. Some of the light passes through the object.

What is the basic building block of all matter

On December 26, 2004, a great earthquake occurred off the coast of Sumatra and triggered immense waves (tsunami) that killed some 200000 people.

What are the four fundamental forces

If the total mass is m, find the moment of inertia about an axis through the center and perpendicular to the plane of the square. use the parallel-axis theorem.

What is the processing of information and other input into your memory called? A. Sensory representation B. Encoding C. Storage D. Conditioning

Scientific theories can change over time as new information is discovered if a scientififc theory changes does this mean that it was not a good theory to begin with?

In general, if the temperature of a chemical reaction is increased, the reaction rateA. IncreasesB. decreasesC. remains the sameD. Cannot be predicted

what is the hottest plant

Tina is waiting at the bus stop. She sees and hears an ambulance as it approaches and passes by her. Which two changes in the loudness of the sirens does Tina hear?