Answer:
Hello! :)
Explanation:
A base quantity (or basic quantity) is chosen and arbitrarily defined, rather than being derived from a combination of other physical quantities. The 7 base quantities are: SI units are used as standardised units in all measurements in the world. SI is the short form for “International System of Units”
Hope This Helps!!!
Answer:
a long time after the switch is closed
Explanation:
Energy stored in an inductor is given by
E = 1/2 L i²
A). Before the switch is closed the current in the circuit is zero so energy in inductor will be zero.
B). Inductor opposes the flow of current. It takes some time for current to reach its maximum value. So immedialtly after closing the switch the current and energy in inductor will still be zero.
C). After closing the switch it takes some time for current to reach its maximum value as inductor opposes the flow of current. so after a long time the current in inductor will reach its maximum value and hence the energy stored will be maximum.
Answer:
2.59 T
Explanation:
Parameters given:
Current flowing through the wire, I = 29 A
Angle between the magnetic field and wire, θ = 90°
Magnetic force, F = 2.25 N
Length of wire, L = 3 cm = 0.03 m
The magnetic force, F, is related to the magnetic field, B, by the equation below:
F = I * L * B * sinθ
Inputting the given parameters:
2.25 = 29 * 0.03 * B * sin90
2.25 = 0.87 * B
=> B = 2.25/0.87
B = 2.59 T
The magnetic field strength between the poles is 2.59 T
Bands of waves in the electromagnetic spectrum are arranged in order of <span>frequency and wavelength. The answer is letter A. The rest of the choices do not answer the question above.</span>
The correct answer is water.
Heat energy is calculated by multiplying specific heat capacity of a substance with its mass and the change in temperature. Its is measured in joules.
Therefore; Heat = specific heat capacity ×mass ×change in temperature.
To calculate change in temperature we divide heat energy with the product of mass and the heat capacity. Hence, if mass is kept constant the higher the specific heat capacity the lower the change in temperature. In this case water has the highest heat capacity and this accounts for the smallest change in temperature when a constant energy of 10 Joules is supplied.
