Who first proved that the sun is not at or even close to the center of the milky way galaxy?

Why do pieces of dry ice gradually get smaller when left at room temperature?

A boat crosses a 200m wide river at 3m/s, north relative to water. The river flows at 1m/s as shown. What is the velocity of the boat as observed by a stationary observer on the river back from the boat departed?

How much energy is released if a sample loses 0.0001 kg mass through radioactive decay

Carlos gives a grocery cart a 60-N push. The cart has a mass of 40 kg. What is the cart's acceleration?

Which type of seismic wave does not travel through liquid? A. L waves B. P waves C. S waves D. Surface waves

A container can be made from steel [β = 36 * 10-6 (C°) - 1] or lead [β = 87 * 10-6 (C°) - 1]. A liquid is poured into the container, filling it to the brim.

Which solution has the greatest number of hydroxide ions? baking soda, pH = 9 milk, pH = 6 tomato juice, pH = 3.5 vinegar, pH = 2A substance is boiled repeatedly and stirred, but the solute never mixes with the solvent.

Part of the suns energy that reaches the Earths surface is absorbed by land and water as heat. The earths surface then releases heat back into the atmosphere Which of the following is true about this solar energy that is absorbed and released by

When Emeka was first training his dog, Smooches, to heel he would give Smooches a treat when she stayed close during walks. Now Smooches stays right by Emeka's side, even when she is not on her leash. In this case, a.

What must vectors have in common in order to be added?