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question1. 5th 4184 joules
6th kilogram-force is a unit of measurement of force
The kilogram-force is a metric unit of force (kgf). The kilogram-force is equal to a mass of one kilogram multiplied by the standard acceleration due to gravity on Earth, which is defined as exactly 9.80665 meter per second².
7th 1.60217662 × 10-19 coulombs
1st One megaampere is equal to 1,000,000 amperes, which are the electrical current equal to the flow of one coulomb per second. The megaampere is a multiple of the ampere, which is the SI base unit for electric current. In the metric system, "mega" is the prefix for 106.
Explanation:
question2
1st A scalar or scalar quantity in physics is a physical quantity that can be described by a single element of a number field such as a real number, often accompanied by units of measurement. A scalar is usually said to be a physical quantity that only has magnitude, possibly a sign, and no other characteristics.
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In geometric optics, the angle of incidence is the angle between a ray incident on a surface and the line perpendicular to the surface at the point of incidence, called the normal. ... The angle of incidence at which light is first totally internally reflected is known as the critical angle.