PHYSICS HIGH SCHOOL

One light-hour is the distance that light travels in an hour. How far is this, in kilometers? (Recall that the speed of light is 300,000 km/s.) _______A) 18 million kmB) 1.08 billion kmC) 300,000 kmD) 9.46 trillion kmE) 100 million km

Answers

Answer 1

Answer:

Answer:

B 1.08 BILLION

Explanation:

SEE ATTACHMENT

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Potential and kinetic energy 1. An apple falling from a tree 2. A stationary ball on the ground 3. A sleeping dog 4. A boy running across the street 5. A car traveling on the road 6. A stretched rubber band 7. A basketball being thrown 8. A girl biking at the park 9. A leaf lying on the ground 10. A planet revolving around a star
The radius of Venus is 3760.4 miles. What is the approximate surface area of Venus, to the nearest whole number?

Every 4 years we have a leap year on our calander to make up the extra.......

Answers

The Earth takes very nearly (365 and 1/4) days to go around the sun.

If our calendar always had 365 days, then the year would end and re-start
too soon, and the beginning of Spring (and every other season) would
eventually drift into the months after March.

If our calendar always had 366 days, then the year would end and re-start
too late, and the beginning of Spring (and every other season) would
eventually drift into the months before March.

We can't make calendars with an extra quarter-day in each year. But we
keep them lined up with the real year by saving up the quarters, and adding
one full day to the calendar every 4 years.

Which of the following is the primary medium for beach erosion? ice gravity wind water

Answers

i believe it is water that is the medium for beach erosion

I think it would be water because the waves (tides) are repeatedly bringing sand to the shore and dragging more sand back into the ocean. So water seems the most logical.

A _______ is a repeating disturbance or vibration that transfers or moves energy from place to place without transporting mass.force
wave
vacuum
medium
PLZ help me!

Answers

Answer: wave

Explanation:

These are the basic definitions and characteristic of the terms given, which show tha the only rigth answer is the second option: wave.

1) Force is an interaction. There are four natural forces: electrostatic, gravity, strong nuclear force and weak nuclear force.

2) Wave: is a sequence of pulses or vibrations that cause the continuous transportation of energy (propagation). There is not transport of mass, only energy.

Some examples of waves are sound waves, electromagnetic waves (light, radio waves, micro waves, infrarred waves, ultraviolet waves).

3) Vacuum: is the absence of matter; empty space. Only electromagnetic waves can travel through vacuum; other waves need a medium to travel.

4) Medium: any matter is a medium: a solid, the air, a liquid, all of them are media through which waves can transport its energy, depending of the wavelength.

A wave, waves transport energy rather than matter from one area to another.
An example of this is conduction of thermal energy, for instance when you heat up a saucepan the metal areas of the pan not touching the heat source still heat up due to waves of thermal energy (conduction)

A fishing boat using sonar to locate fish is employing

Answers

A fishing boat using sonar to locate fish is employing reflection.

The Sun's energy reaches the earth by _____. conduction convection radiation fusion

Answers

When heat or any other kind of energy move from one place
to another, conduction and convection need some material stuff
along the way, otherwise they don't happen.

There is no material stuff between the Sun and the Earth, so
the Sun's energy reaches us by radiation.

The Sun's energy reaches the earth by Radiation

Further explanation

Heat is the energy transfer of an object with the environment or other objects because of the temperature difference between the two.

Heat moves from high-temperature objects to low-temperature objects

The process of heat transfer has 3 types

1. Conduction, which is the transfer of energy that requires an intermediate medium and without the transfer of particles

2. Convection is the transfer of energy due to the movement of the particles

3. Radiation is the transfer of energy without an intermediate medium / through vacuum

Energy from sun to earth through its atmosphere is not through conduction because the atmosphere is a bad conductor. Whereas convection is not possible because the earth must be heated first. And conduction and convection cannot pass through vacuum

Heat transfer from the sun occurs because its energy is carried in the form of electromagnetic waves