Answer: Earth's magnetic field has flipped its polarity many times over the ... Earth has settled in the last 20 million years into a pattern of a pole reversal about ... And while reversals have happened more frequently in "recent" years, when ... per year, as opposed to about 10 miles per year in the early 20th century.
Explanation:
A coil of wire that is carrying a current and produces a magnetic field is called a solenoid. So the correct option is option "B", in regards to the question given. The term solenoid was first invented by the famous French physicist named Andre-Marie Ampere. In the terms of a physicist, it indicates a coil that has a far greater lenth than the diameter and is wrapped around a core made of metal to create a uniform magnetic field. If a compass is brought near the wire through which current is passing, it will indicate the direction in which the current is flowing.
Answer: 888.45 K or 615.3 °c
Explanation:
According to Gay Lussacs law which states that at constant volume, pressure of an ideal gas is directly proportional to it's absolute temperature.
P/T = Constant
Therefore, P1/T1 = P2/T2
P1 = 6.7 atm
T1= 23°c = 273.15 + 23 = 296.15K
Since P2 is tripled, then,
P2 = 6.7 x 3= 20.1 atm
T2 = (20.1 x 296.15) ÷ 6.7
T2 = 888.45 K
Or in celcius 615.3°c
Answer:
The amount of Potential Energy lost in the form of Thermal Energy is equal to 41.64 MJ.
Explanation:
mass of the cart and passengers = m = 3.5*10⁴ kg
Height = h = 126.5 m
g = 9.8 ms⁻²
v = 10 ms⁻¹
At the top position the Total energy of the ride is in the form of potential energy given as:
P.E = mgh
= 3.5*10⁴*9.8*126.5
= 43389500 J
At the bottom of the drop, all the Potential Energy will be converted into K.E as the ride develops speed given as:
K.E = 0.5*m*v²
= 0.5*3.5 x 10⁴*100
= 1750000 J
The K.E is much less than the P.E energy even though all the P.E of the ride has been converted. The loss of energy is due to the formation of thermal energy which can be calculated as:
Thermal Energy lost = Total energy in the form of P.E(top) - Total energy in the form of K.E(bottom)
= 43389500 - 1750000
= 41639500 J
= 41.64 M J approx M J = mega joule = 10⁶ J