Answer:
A. Step-up voltage transformers have fewer turns in the primary than in the secondary winding.
Explanation:
A step-up transformer is a transformer that transform a lower voltage in input into a higher voltage in output.
The transformer equation states that:
where
Vp is the voltage in the primary winding
Vs is the voltage in the secondary winding
Np is the number of turns in the primary winding
Ns is the number of turns in the secondary winding
we can re-arrange the equation as
For a step-up voltage,
so
which implies also
so, the primary winding has fewer turns than the secondary coil.
The change of the copper temperature if a 0.6g piece of copper is heated and fashioned into a bracelet with 62,100 J amount of energy transferred is 265.4°C.
<h3>How to calculate change in temperature?</h3>
The change in temperature of a metallic substance in a calorimetry experiment can be calculated using the following formula:
Q = mc∆T
Where;
- Q = quantity of heat absorbed or released
- m = mass of copper
- ∆T = change in temperature
- c = specific heat capacity
According to this question, a 0.6g piece of copper is heated and fashioned into a bracelet The amount of energy transferred by heat to the copper is 62,100 J.
62100 = 0.6 × 390 × ∆T
62100 = 234∆T
∆T = 62100/234
∆T = 265.4°C
Therefore, the change of the copper temperature if a 0.6g piece of copper is heated and fashioned into a bracelet with 62,100 J amount of energy transferred is 265.4°C.
Learn more about change in temperature at: brainly.com/question/28034251
#SPJ1
Since the runner only moved in one direction, his distance and placement are the same.
The distanced travelled/his displacement is 12 metres. :)
Explanation:
F=ma=(100kg)(4m/s/s)=400N
N is Newton, the SI unit of force, which is a kg•m/s/s. F is net force and, of course, m is mass and a is acceleration.
B. Increased cases of asthma,
the large amount of dirt/dust irritates our breathing tracts and those with asthma may suffer from an episode much easily breathing in polluted air.
_Brainliest if i helped!