As a protest against the umpire's calls, a baseball pitcher throws a ball straight up into the air at a speed of 17.3 m/s. in the process, he moves his hand through a distance of 1.43 m. the acceleration of gravity is 9.8 m/s 2 . if the ball has a mass of 0.196 kg, find the force he exerts on the ball to give it this upward speed. answer in units of n.

Which boundary is associated with the building of the himalaya mountains? convergent transform divergent hot spot

What is the most useful equation for electric power?

While studying chemical reactions and conservation of matter, sarah's class conducted a variety of experiments. sarah and her lab partner found the mass of a wax candle and placed the candle in a flask. the students lit the candle and let it burn to completion. all that was left was wax and charred candle wick. per their teacher's instructions, the students found the mass of the products. their data can be seen in the data table. formulate a hypothesis the students could test to explain why the experiment did not support the law of conservation of matter. a) the students could repeat the experiment using different candles; there might have been a flaw in the candle. b) the experiment should be repeatable. the students should run several trials and then take an average of the after mass in each trial. c) the students should have someone in the class check their measurement skills as they repeat the experiment. they may have made an error using the balance. d) the students should burn the candle in a container that has some type of lid so that any gas that is a product of the reaction can be contained and massed. submit