Heat energy is the amount of heat energy in joules gained by a substance when its temperature is raised by 1 degree Celsius per kilogram.
So to find its heat energy we will use the formula Q=mc( delta t)
(NB: im not able to type delta t so to get an idea it is a small triangle with t attached to it indicating change in temperature.
Then we put the values :
Q=(0.026)(500)(22-11)
m_ is mass converted to kilograms
c_ is the specific heat capacity of iron according to Wikipedia it is 500J/kg degree Celsius.
delta t_ is change in temprature
finally we calculate and the answer is
130J .
Given :
A spring whose spring constant is 850 N/m is compressed 0.40 m.
To Find :
The maximum speed it can give to 0.50 kg ball.
Solution :
We know, Kinetic energy = Energy stored in spring
Hence, this is the required solution.
Answer:
Faraday's law
, he direction of the magnetic field changes by 180º, in the polarity inversion processes, induces a voltage.
Explanation:
For this exercise let's use Faraday's law
E = - dФ / dt
Ф = B.A = B A cos θ
where B is the magnetic field, A is the area and θ is the angle between the field line and the normal to the area.
We can see that an electromotive force (voltage) is indexed when there is a variation of the field B, a variation of the area and change of the angle or when there is a combinational of them.
In this case, the magnitude of the field is constant, as the wire is rigid metal, the area is constant, but the direction of the magnetic field changes by 180º, in the polarity inversion processes, for which reason each change induces a voltage.
If a voltage is created in the ring, which has a resistance, a current is also generated in it.
Therefore the answer is If a current is created in the hoop
This is a question about converting energy from one form to another.
<span>While it is sitting on the ledge, it isn't moving, so at that point it doesn't have any kinetic energy. What it has is gravitational potential energy due to its height above the ground. </span>
<span>Just as it lands, it's at ground level, so it doesn't have any gravitational potential energy anymore. </span>
<span>The reason is that on the way down, it sped up, so all its original gravitational potential energy was turned into kinetic energy. </span>
<span>So if you can work out how much potential energy it had to start with, you will know that that is how much kinetic energy it ended up with just before it landed. </span>
<span>potential energy = m * g * h </span>
<span>where m is the mass, g is the acceleration due to gravity and h is the height </span>
potential energy = 4.45 * 9.81 * 0.800 = 35.3 J
Hope that helps. Please give me Brainlyest answer. :]
speed of the bacterium is 3.5 mm/s
total distance traveled by bacterium = 8.4 cm
time take to cover the distance
<em>so it will take 24 s to move this distance</em>
