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mafiozo [28]
3 years ago
14

What is the relationship between potential and kinetic energy in chemical reactions?

Physics
1 answer:
astraxan [27]3 years ago
3 0

Answer:

2 and 3

Explanation:

because that's how kinetic and potential energy work

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A 49 kg pole vaulter running at 10 m/s vaults over the bar. Her speed when she is above the bar is 0.7 m/s. The acceleration of
nika2105 [10]

Answer:

Height will be 5.127 m

Explanation:

We have given mass m = 49 kg

Speed over the bar v = 10 m /sec

Acceleration due to gravity g=9.8m/sec^2

Kinetic energy on the ground =\frac{1}{2}mv^2=\frac{1}{2}\times 49\times 10^2=2450J

Potential energy on the ground =mgh=0 (as height will be zero )

Speed above the bar = 0.7 m /sec

So kinetic energy above the bar =\frac{1}{2}mv^2=\frac{1}{2}\times 49\times 0.7^2=12J

Potential energy above the bar = mgh

From energy conservation

Total kinetic energy = total potential energy

So 2450+12=0+49\times 9.8\times h

h=5.127m

7 0
3 years ago
6.3 Calculate the current that flows through the element of a heater when the potential difference is 250V and the resistance of
ryzh [129]

Answer:

16.66

Explanation:

3 0
2 years ago
Have you ever visited an amusement park and taken a ride on a parachute drop ride? These types of rides take the passengers to a
Triss [41]

Answer & Explanation:

a)

Lenz's law states that the direction of induced electric current is always such that, it opposes the change in magnetic flux.

In a drop ride, the hub on which we sit and are hung to is an electromagnet and there are many such magnets mounted on the columns of the support. what happens is these electromagnets (in support) generate a repulsive magnetic field with respect to the field generated by the hub solenoids. this results in lift generation till the top of ride. reaching the top, the bar solenoids are at their maximum repulsive force. Then the solenoids in column are set current less means electric supply is cut off. this makes you fall under the effect of gravity. by the time you are half way down, column  solenoids are turned on again. As the hub solenoid approaches every single electromagnet in supporting columns. Due to change in magnetic field (with respect to lenz's law) an opposing current induces further providing resistance to the fall, this continues until the ride comes to rest completely. This is how it works.  

c) In addition, highly compressive springs, dampers, viscous dampers, etc. could be used in its place.

but the above listed cannot provide a differential braking,

have a limited lifecycle,

will provide resistance during lift also,

require higher maintenance

3 0
3 years ago
The hardest known natural material is _____. <br> jade<br> quartz<br> diamond<br> talc
kakasveta [241]
Its diamond i am 100% right!

8 0
3 years ago
Read 2 more answers
The mass of an object is 275.32g and its density is 7.562g/cm 3 . Calculate its volume by keeping significant figures in view.
Genrish500 [490]

Answer:

36.408cm3

Explanation:

Since we acknowledge that density is d= m/v, once we switch it up to maintain v as the number to be found it will change to v=m/d. Therefore, 275.32/7.562 is 36.408 and the unit is cm cube!

Hope that helped!!

8 0
3 years ago
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