PHYSICS HIGH SCHOOL

The energy of a photon of electromagnetic radiation with wavelength of 800nm is 2.5 x 10-19) True False

Answers

Answer 1
Answer:

Answer:

E = h ν = h c / λ         energy of photon

E = 6.62E-34 * 3.00E8 / 8.00E-7

E = 6.62 * 3.00 / 8.00 * e^-19 J

=2.5E-19 J

True

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_______ is a subtype of the continental climate. A. that absorbs ultraviolet radiation from the sun.
B. where gas molecules can be exchanged between Earth's atmosphere and outer space.
C. where air temperature stops increasing with altitude and starts decreasing.
D. closest to the Earth's surface.

Answers

The right answer for the question that is being asked and shown above is that: "B. where gas molecules can be exchanged between Earth's atmosphere and outer space." Where gas molecules can be exchanged between Earth's atmosphere and outer space is a subtype of the continental climate

At which point on this electric field will a test charge show the maximum strength?A
B
C
D

Answers

Answer:

A

Explanation:

The figure shows the electric field produced by a spherical charge distribution - this is a radial field, whose strength decreases as the inverse of the square of the distance from the centre of the charge:

E\propto (1)/(r^2)

More precisely, the strength of the field at a distance r from the centre of the sphere is

E=k(Q)/(r^2)

where k is the Coulomb's constant and Q is the charge on the sphere.

From the equation, we see that the field strength decreases as we move away from the sphere: therefore, the strength is maximum for the point closest to the sphere, which is point A.

This can also be seen from the density of field lines: in fact, the closer the field lines, the stronger the field. Point A is the point where the lines have highest density, therefore it is also the point where the field is strongest.

If an electric charge is accumulated on an object, it is referred to as _____

Answers

Static, because it stays on the object.
It is referred as Static Electricity.

A car passes the Eiffel tower driving at a constant rate of 60 km per hour. A second car, traveling at a constant rate of 75 km per hour, passes the Eiffel tower a while later and then follows the first car. It catches the first car after traveling a distance of 75 km past the Eiffel tower. How many minutes after the first car passed the Eiffel tower did the second car pass the Eiffel tower

Answers

Answer:

300 minutes.

Explanation:

Given,

Speed of car 1 = 60 Km/h

Speed of car 2 = 75 Km/h

distance travel by car 2 to catch car 1 = 75 Km

time taken to catch the car = ?

Relative velocity between the car = 75 - 60 = 15 Km/h

time = (distance)/(speed)

time = (75)/(15)

t = 5 hrs

t = 5 x 60 = 300 minutes.

NEED ASAP PLEASE !!! Suppose that a block is pulled 16 meters across a floor. What amount of work is done if the force used to drag the block is 22 N?

A. 200 J
B. 330 J
C. 352 J
D. 220 J

Answers

Answer: Option (C) is the correct answer.

Explanation:

Work is defined as the energy required when force is applied in a certain direction.

The expression for work, force and distance is as follows.

                        W = F × d

where,      W = work

                 F = force

                 d = distance

It is given that force applied to drag the box is 22 N and distance is 16 meters. Therefore, calculate work done as follows.

                        W = F × d

                            = 22 N × 16 meters

                            = 352 Nm               (1 Newton meter = 1 joule)

or,                   W = 352 J

Thus, we can conclude that amount of work done is 352 J.
work = force x distance
22N x 16m = 352 J

List two examples of energy transformation necessary for the sporting event to take place.

Answers

1. in commentary electrical to sound
2. battery loudspeakers are used chemical to sound
hope it helps

Answer:

1. in commentary electrical to sound

2. battery loudspeakers are used chemical to sound

hope it helps

Explanation:

i copied the other person and my teacher said i got it right
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