A star burns hydrogen into helium which are the two lightest elements.
The acceleration of gravity on the surface of Venus
is 8.87 m/s² ... about 9.6% less than on Earth's surface.
That's the most similar of any body in our solar system.
Answer:
a. E =
b.
Explanation:
The important thing to remember is to use Gauss Law. This is a relation that describes the distribution of electric charge to the resultant electric field.
Linear charge density means charge per unit length of material.
Data:
The metal cylinder is hollow.
The unit length is L.
a.The expression will be as follows:
for charge inside the cylinder, where r < R, the expression is:
E =
b. Let's assume that the cylinder is a coaxial cylinder with a radius r > R, then the electrical field strength is given as:
E =
E =
This gives:
The solution informs us that there is a surface change taking place on the cylinder. Therefore, there will not be a magnetic field across it.
Answer:
C
Explanation:
Diffraction grating is an optics tool used when there is a need to separate light of different wavelengths using a high resolution. This tool is used in:
- Optical pulse compressing devices
- Spectrometers
- Lasers
<span>A red ladybug appears red in white light, red in red light, and black in blue light.
When a ladybug is red it means that its shell reflects the red light, or the radiation between 650-700 nm, from the visible spectrum. A white light is composed of all colours, the whole visible spectrum, therefore, the ladybug shell will reflect the red colour. When considering a red light over a red ladybug, the ladybug will again appear red because the spectrum in which there is reflection of colour from its shell is present. On the other hand, when blue light is put over a red ladybug, the ladybug will appear black as there is no light that its shell can reflect.</span>