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sineoko [7]
2 years ago
10

What is the speed of a person walking 7mi in 2hours

Physics
2 answers:
Natali [406]2 years ago
3 0
The person is walking 3.5 miles an hour
Arlecino [84]2 years ago
3 0
It's 3.5 your welcome
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Currents that occur in deep water are:
Genrish500 [490]

Answer:E

Explanation:

Thermohaline

6 0
3 years ago
A "phaser" blast form the starship "ENTERPRISE" sends out a
Iteru [2.4K]

The frequency of the light beam is 4.72 x 10¹⁴ Hz.

<h3>Frequency of the light beam</h3>

The frequency of light beam and wavelength of light is related in the following equations;

c = fλ

where;

  • c is the speed of light = 3 x 10⁸ m/s
  • f is the frequency
  • λ is the wavelength

f = c/λ

f = (3 x 10⁸) / (636 x 10⁻⁹)

f = 4.72 x 10¹⁴ Hz

Thus, the frequency of the light beam is 4.72 x 10¹⁴ Hz.

Learn more about frequency of light beams here: brainly.com/question/14295752

5 0
2 years ago
While describing a circular orbit 300 mi above the earth a space vehicle launches a 6000-lb communications satellite. Determine
yarga [219]

Answer:

\Delta U = 2.2126039 x 10^{12} J

Explanation:

While the satellite is in the space vehicle, it has the next potential energy

U = -\frac{GmMe}{r}

             where G is the gravitational constant

                         m is the satellite's mass in kilograms

                        Me is the earth's mass

                        r is the orbit's radius from to the earth's center in meters

U = - \frac{6.67x10^{-11}*2721.554*5.972x10^{24}  }{482803}

U = -2.2423x10^{12} J

The additional energy required is the difference between this energy and the energy that the satellite would have in an orbit with an altitude of 22000 mi

U = -\frac{6.67x10^{-11}*2721.554*5.792x10^{24}  }{35405568}

U = -29696124610.3 J

Then

\Delta U = 2.2126039 x 10^{12} J

6 0
3 years ago
Look at the graph and extrapolate how many baskets were made by the team at 8.5 minutes.
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C
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8 0
2 years ago
Which one is easy to hold in hand,a glass sheet or a cardboard? give reason
kipiarov [429]

Answer:

Opaque materials are those objects which does not allow light to pass through them. Example: - Wooden board, umbrella.

Transparent materials are those objects which allow light to pass through them in straight lines. As a result we can see the objects clearly. Example: - Plane mirror, water.

Translucent materials are those which let some light to pass through them, the light rays get scatter in all directions, so cannot see clearly through them. Example: - Fog, smoke.

Luminous objects are those which emit light on their own. Example:-Sun, firefly.

Non-luminous objects are those which reflect the light from luminous bodies. Example: - Moon, mirror.

Based on the above definitions we can classify the objects as opaque, transparent, translucent, luminous and non-luminous.

Opaque:  A piece of rock, a sheet of aluminium, a mirror, a wooden board, a CD, an umbrella, a wall, a sheet of carbon paper,  a sheet of cardboard.

Transparent: Air, water, a sheet of plane glass.

Translucent: A sheet of polythene, smoke, fog, a sheet of cellophane, a wire mesh.

Luminous: A piece of red hot iron, a lighted fluorescent tube, the flame of a gas burner, a lighted torch, sun, firefly, kerosene stove.

Non – luminous: Air, water, a piece of rock, a sheet of aluminium, a mirror, a wooden  board, a sheet of polythene, a CD, smoke, a sheet of plane glass, fog, an umbrella, a wall, a sheet of carbon paper, a sheet of cardboard, a sheet of cellophane, a wire mesh, kerosene stove, moon.

6 0
3 years ago
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