Answer:
12.9 mm
Explanation:
From v = fλ where v = speed of wave = blood flow rate = 1.5 × 10⁻² m/s and f = frequency of wave = heart rate = 70 beats per minute = 70/60 beats per second and λ = wavelength of waves in Harriet's aorta.
λ = v/f = 1.5 × 10⁻² m/s ÷ 70/60 beats per second
= 6 × 1.5 × 10⁻²/7
= 1.29 × 10⁻² m
= 12.9 mm
Answer:
The electric field and the magnetic field
Explanation:
An electromagnetic wave consists of oscillations of an electric field and a magnetic field, oscillating perpendicularly to each other. The oscillation of the two fields also occur on a plane which is perpendicular to the direction of the propagation of the wave itself (due to this feature, this kind of waves are called transverse waves).
One of the main difference between electromagnetic waves and other waves is that electromagnetic waves are the only one that can travel through a vacuum, since they do not need a medium to propagate (such as, for example, sound waves).
The speed of the electromagnetic waves is constant in vacuum and its value is called speed of light, equal to:
Answer:
The current is
Explanation:
From the question we are told that
The length of the solenoid is
The radius is
The number of turn is
The magnetic field is
The magnetic field produced is mathematically represented as
making the subject
Where is the permeability of free space with values
substituting values
As a head-up, it is important to notice that a white dwarf only shines thanks to the stored energy and light, because a white dwarf doesn't have any hydrogen left to perform nuclear fusion.
Now the process:
First, the white dwarf accumulates all the extracted matter from its companion, onto its own surface. This extra matter increases the white dwarf's temperature and density.
After a while, the star reaches about 10 million K, so nuclear fusion can begin. The hydrogen that has been "stolen" from the other star and accumulated in the white dwarf's surface it's used for the fusion, dramatically increasing the star's brightness for a short time, causing what we know as a Nova.
As this fuel its quickly burnt out or blown into space, the star goes back to its natural white dwarf state. Since the white dwarf nor the companion star are destroyed in this process, it can happen countless of times during their lifespan.