Water evaporators is this a physical change or a chemical change?

How many protons and neutrons are present in an atom of 3919k? express your answer as integers separated by a comma?

A 2.17 g sample of acetylsalicylic acid required 23.88 mL of 0.5043 M NaOH for complete reaction. Addition of 13.46 mL of 0.4472 M HCl to the flask containing the aspirin and the sodium hydroxide produced a mixture with pH

Which of the following types of radiation can penetrate through paper but not through wood? Alpha rays Beta rays Gamma rays Proton rays

During a baseball game, a baseball is struck at ground level by a batter. The ball leaves the baseball bat with an initial velocity v0 = 26 m/s at an angle θ = 17° above horizontal.

If the acceleration is 400 m/s/s and the mass is 800kg, calculate the force

How long does it take the moon to go from full-moon phase to new-moon phase

What is the rule of calculation of elastic potential energy?

In 1940, the Tacoma Narrows Bridge across the Puget Sound collapsed. The bridge was a suspension bridge. The wind blowing through the narrows matched the natural frequency of the bridge.

What has more momentum: a sports car moving at 100 mph or a train that is not moving?

What is your mass in kilograms?