A baseball on a T-ball stand has no momentum until it is hit with a bat. When Tyler swings the bat, it has a momentum of 12 kg m/s. After the bat hits the ball, the ball has a momentum of 8 kg m/s. What is the momentum of the bat AFTER it hits the ball

Answers

Answer 1
Answer:

Answer:

4 kg m/s

Explanation:

According to the Law of Conservation of Momentum, the total momentum must be the same before and after a collision. The total momentum before the bat hit the ball was 12 kg m/s. After the collision, the ball has a momentum of 8 kg m/s. Therefore, the bat must have a momentum of 4 kg m/s.

Answer 2
Answer: positive direction : bat swing

total momentum before = after
12(bat) + 0(ball) = 8(ball) + bat-after

bat-after is positive then direction is the same

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The one feature that is not found on the ocean floor is a river. A river and an ocean would not be found together, even on the ocean floor.

  ↑   ↑   ↑    Hope this helps! :D

What makes an inductor/capacitor different from other passive circuit elements? a) Inductors store energy in a magnetic field, while capacitors store energy in an electric field. b) Inductors resist changes in current, while capacitors resist changes in voltage. c) Inductors are used in AC circuits, while capacitors are used in DC circuits. d) Inductors are always connected in series, while capacitors are always connected in parallel.

Answers

Answer:

Give any one cultural practice

Assume a hydro power plant with 85% efficiency and 30m head. It is measured that 60 kg of water passes through the turbine in 1 s. What is the output electrical power of this power plant? a) less than 1 kW
b) between 1 kW and 10 kW
c) more than 10 kW

Please show calculations!

Answers


The potential energy of each kg of water, before it falls, is

   (M G H) = (1kg) (9.8 m/s²) x (30 m) = 294 joules

The potential energy lost by 60 kg of water pouring through is

      (60 x 294) = 17,640 joules

The power output of the plant is

         (17,640 joules/sec) x (85%) = 14,994 watts
                                               = almost but not quite 15 kW.

(If you used 10 for gravity, it would come out to 15.3 kW)


How do simple machines make work easier? A.They change the strength or direction of a force.


B.They maintain the distance of a force.


C.They apply force quickly.


D.They decrease the power available.

Answers

I believe it is c. hope this Helps :)

A heater with an effective resistance of 4.8 ohms is connected to 240.0 volts if it operated approximately 25% of the time and electricity costs $0.10 per kWh what will be the electrical bill for30 days

Answers


-- Power used when the heater is running =

                         V²/R = (240)²/4.8= 12,000 watts. (12 KW)

(A gigantic heater ... suitable for maybe a theater, not for a home.)

-- Energy consumed in one day:

                 (12 KW) x (24 hours) x (25%) = 72 KwH per day

-- Energy consumed in 30 days:  (72 KwH/day) x (30 days) =

                  2,160 KwH in 30 days

-- Cost = ($0.1 / KwH) x (2,160 KwH) = $216.00  in 30 days


Energy is transferred by the process of convection from the hot water at the bottom of the tank to the cooler water at the top. Explain how

Answers

When hot water comes in contact with cold water , the hot water from the bottom of the vessel is hot and so reduces its density. So low density ware goes up and cold water from side or above replaces the space. This is how Energy is transferred by the process of convection from the hot water at the bottom of the tank to the cooler water at the top.

What is convection?

The process of heat transfer from one part of a fluid to another part by the actual movement of the particles of the fluid is called convection. Liquid and gases are heated by the process of convection.

When hot water comes in contact with cold water , the hot water from the bottom of the vessel is hot and so reduces its density. So low density ware goes up and cold water from side or above replaces the space. This is how Energy is transferred by the process of convection from the hot water at the bottom of the tank to the cooler water at the top.

learn more about convection

brainly.com/question/16635311?referrer=searchResults

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The transfer of energy means, in convention process, transport of matter. In this case, hot water has lower density than cool water. The water with less density ascends and leaves gaps that are occupied with cooler water "packages".