Chemistry, 23.11.2019 22:31 sarinaneedshelp01

Abaseball player hits a ball. which is the best description of the energy of the ball as it flies over the pitcher’s head?

Answers: 2

Show answers

Answers

Answser: as the ball is ascending, its kinetic energy decreases and the gravitational potential energy decreases. When the ball is at the maximum altitude, the gravitational potential energy is maximum and the kinetic energy is minimum. As the ball is descending, it loses gravitational potential energy and gains kinetic energy. The total mechanical energy is conserved.

Explanation:

Remember, gravitational potential energy is due do the position (altitude) and the kinetic energy is due to motion (speed).

Mathematically they are:

Gravitational potential energy = mass × gravitaional acceleration × altitude

Kinetic energy = mass × speed² / 2.

Total mechanical energy = gravitational potential energy + kinetic energy.

The ball starts with a very low gravitational potential energy (low altitude) and high kinetic energy (high speed), as the travels upward and far away from the hitter, the kinetic energy is transferred to gravitational potential energy, so the ball gains altitude and loses speed.

When the ball reaches the maximum altitude, it has lost all the vertical speed, and the kinetic energy is at a minimum level, while its gravitational potential energy is at the maximum.

From that point, the ball starts to descend, losing grativational potential energy and gaining kinetic energy. At the moment that the ball reaches the ground it will be again at the minimum grativational potential energy and maximum kinetic energy.

Answer from: Quest

they both have a y in them

Answer from: Quest

the balanced equation for reaction of ca metal with o2 to produce cao is as below

2 ca+ o2→ 2 cao2

explanation

the reaction is balanced since the number of atoms in reactant side is equal to number of atoms in product side. for example they are 2 atom of ca in reactant side and 2 atoms of ca in the product side.

the process is a meet the requirement of redox reaction because : calcium is oxidized from oxidation state 0 to 2+ while oxygen is reduced from oxidation state 0 to 2-

Another question on Chemistry

Chemistry, 22.06.2019 00:10

Which of the following best describes the formation of plasma?

Answers: 1

Answer

Chemistry, 22.06.2019 05:00

You mix the pks of succinic acid are 4.21 and 5.64. how many gramsa graduate student at sdsu wants to measure the activity of a particular enzyme at ph 4.0. to buffer her reaction, she will use a buffer system based on one of the acids listed below, which acid is most appropriate for the experiment? of monosodium succinate (fw = 140 g/mol) and disodium succinate (fw = 162 g/mol) must be added to 1 l of water to produce a solution with a ph 5.28 and a total solute concentration of 100 mm? (assume the total volume remains 1 liter, answer in grams monosodium succinate, grams disodium succinate, respectively.) volumes of 0.05 m nah2po4 and 0.05 m na2hpo4 (pk's for phosphoric acid are 2.15, 6.82 and 12.38). which of the following best describes the resulting solution?

Answers: 2

Answer

Chemistry, 22.06.2019 21:00

Acandle’s wick is the fabric string that holds the flame, and it burns down at a constant slow pace when the candle is lit. the wick is usually surrounded by wax. which is the most important property of covalent compounds that makes them useful for making candle wax? a low boiling point a low melting point a high boiling point a high melting point

Answers: 1

Answer

Chemistry, 22.06.2019 21:00

Which property of water causes water drops to bead on a freshly waxed car?

Answers: 2

Answer

You know the right answer?

Abaseball player hits a ball. which is the best description of the energy of the ball as it flies ov...

Questions