The mercury in a thermometer has a volume of 0.206 milliliters and a mass of 2.8 grams. what is its density?

The current in a hair dryer measures 11 amps. the resistance of the hair dryer is 12 ohms. what is the voltage?unit:

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?

Which of the following are guidelines to follow for obtaining accurate observations