Apositively charged rod is brought close to a grounded metal sheet without touching. two experiments are done: experiment a: the charged rod is first taken far away and then the metal sheet is disconnected from ground. experiment b: the metal sheet is first disconnected from ground and then the charged rod is taken far away. which statement is true regarding the net charge of the metal sheet at the end of the two experiments? hint: draw what is happening at each step. the metal sheet is neutral at the end of both experiments oa: neutral b: negative oa: neutral b: positive the metal sheet is positively charged at the end of both experiments. the metal sheet is negatively charged at the end of both experiments. o a: positive b: neutral o a: negative b: neutral

What is meant by the statement" the melting poin of glycerine is 13 degree celsius

Need asap ! what is the relationship between atmospheric pressure and the density of gas particles in an area of increasing pressure? (2 points) as air pressure in an area increases, the density of the gas particles in that area decreases. as air pressure in an area increases, the density of the gas particles in that area increases. as air pressure in an area increases, the density of the gas particles in that area remains constant. as air pressure in an area increases, the density of the gas particles in that area increases and decreases in an alternating pattern. 3. which of the following correctly describes a way in which earth's atmosphere interacts with the geosphere? (2 points) it contains gases that living organisms breathe. it contains gases that trap incoming solar radiation. it provides a medium for cycles that provide nutrients to living organisms. it provides a medium for water to move between earth's surface and the air. 4. which of the following is considered a drawback to using wind energy as a source of power? (2 points) wind energy is nonrenewable. wind energy produces large amounts of air pollution. 5. a meteorologist predicts that the weather in a region will soon change from clear skies to probable thunderstorms. prior to making this prediction, what did the meteorologist most likely observe on a barometer? (2 points) the barometer fell slightly. the barometer fell substantially. the barometer rose slightly. the barometer rose substantially. 6. which of the following do meteorologists not typically use weather balloons to record? (2 points) atmospheric pressure cloud types humidity temperature 7. during which step in the can crush lab did water vapor force air from the can? (2 points) the can was filled nearly to the top with water. the can was placed on the hot stove top burner for several minutes. the can was removed from the hot stove top burner. the can was placed upside-down in the water-filled pan.

Who was the first scientist to measure speed as distance over time?