What percentage of the mass of a star is converted to electromagnetic energy?" If not how can improve this question to reach 4000 words? If so

Part I. We will leam in this class that the distance from the Earth to the Sun is approximately 1AU = 150,000,000 kilometers. a. Convert this number to meters (1 kilometer = 10° meters) and express it using scientific notation: 150000000000 meters How else might you express this number? (Millions, billions, etc. ?) b. A car on the highway drives at 55 mph = 25 meters per second. How long would it take to drive to the Sun? (Assuming you have a car that works in outer space.) Use the equation distance = velocity x time, or time = distance / velocity. Time = distance/velocity = , seconds (don't forget to use scientific notation.) How many days?. _days How many years?. years Does the answer surprise you?

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Astronomers use a​ light-year to measure distance. A​ light-year is the distance light travels in one year. The speed of light is approximately​ 300,000 km/sec.a. How long is 1​ light-year in​ kilometers?b. The nearest star​ (other than the​ sun) is Alpha Centauri. It is 4.34​ light-years from Earth. How far is that in​ kilometers?c. How long will it take a rocket traveling 42​,000 ​km/hr to reach Alpha​ Centauri?

Using the data in the table below and the appropriate conversion factors, find the mean distance to the moon, in feet. Approximate Values of Some Measured Lengths Length (m) Distance from Earth to most remote known quasar 1 ✕ 1026 Distance from Earth to most remote known galaxies 4 ✕ 1025 Distance from Earth to nearest large galaxy (M31 in Andromeda) 2 ✕ 1022 Distance from Earth to nearest star (Proxima Centauri) 4 ✕ 1016 One lightyear 9 ✕ 1015 Mean orbit radius of the Earth about the Sun 2 ✕ 1011 Mean distance from the Earth to the Moon 4 ✕ 108 Mean radius of the Earth 6 ✕ 106 Typical altitude of a satellite orbiting Earth 2 ✕ 105 Length of a football field 9 ✕ 101 Length of a housefly 5 ✕ 10-3 Size of the smallest dust particles 1 ✕ 10-4 Size of the cells of most living organisms 1 ✕ 10-5 Diameter of a hydrogen atom 1 ✕ 10-10 Diameter of an atomic nucleus 1 ✕ 10-14 Diameter of a proton 1 ✕ 10-15

In he vacuum of space, the speed of light (c) is 3 X 105 km/s and 1 km = 1,000 = 10³ m. Using V = c = fA, what is the wavelength in meters of a light wave with a frequency of 1012 Hz? First convert c to units of meters/second (m/c). Then substitute into the wave equation.