Name the 8 levels of classification from the most general most definite

2. Determine the units of the quantity described by each of the following

notka56 [123]

Explanation:

a.) kg(m/s)(1/s) = force (N)

b.) (kg/s)(m/s) = force (N)

c.) (kg/s)(m/s) = force (N)

d.) (kg/s)(m/s) = force (N)

3 0

3 years ago

3.A golf ball is hit of it’s tee, 200m down the fairway.

Alinara [238K]

Answers:

3. The diagrams showing the forces acting on the golf ball are in the figure attached. Let’s have a detailed look:

a) Here the ball is under 2 forces:

F1 which is called The Normal force and is perpendicular to the surface of the tee where the ball rests

-F1, related to the gravity force, to the weight of the ball, and has the same magnitude, but the opposite direction (That’s why it has a negative sign).

In this case the sum of the forces is 0

b) Here we have again forces F1 and –F1, but in this very moment the club strikes the ball and we have:

F2, the force of the strike

c) While the ball is in its flight, it is under the following forces:

F1, the force of the lift through the air

-F2, the gravity force

-F3, the force of air resistance, also called drag

F4, the tangencial force of the ball flight

4. Here are the sizes and directions of the resultant forces:

i)Two forces of the same magnitude or size are applied to this block, but in opposite directions (in the x-axis). This is expressed as:

F=-10N+10N=0 The resulting force is zero

ii) Two forces of different size and opposite directions in the y-axis are applied to this block. The sum of the forces is:

F=30N-40N=-10N This means the resulting force is 10N applied downwards

iii) In this case the only force applied to the block is -5N applied downwards

iv) Here there are four forces applied to the block.

In the y-axis we have to forces of the same size but opposite directions:

F1=10N-10N=0 This means the applied force in the y-axis is zero

In the x-axis we have two forces of different size and opposite directions:

F2=-15N+10N=-5N This means the resulting force is applied to the –x-side

4 0

3 years ago

Describe how light is used in modern forms of communication.

Kobotan [32]

Answer:Visible light communication (VLC) is a wireless method that uses light emitted by LEDs to deliver networked, mobile, high-speed communication similar to Wi-Fi, leading to the term Li-Fi. It can be used as standalone solution or in a supplementary role to radio-frequency (RF) or cellular network communication

Explanation:

8 0

3 years ago

On the average, about what percentage of the solar energy that strikes the outer atmosphere eventually reaches the earth's surfa

almond37 [142]

I think the answer to your question is twenty-four percent.

5 0

3 years ago

You apply the brakes of your car abruptly and your book starts sliding off the front seat. Three observers sitting in the car ex

krek1111 [17]

Answer:

All the observers are correct.

Explanation:

This is simply a problem of reference frames from which the motion of the book is being viewed by the various observers.

From their various reference frames, they are all correct.

Observer A must be in the inertial reference frame.

Observers who can explain the behavior of the book and the car by using the relationship between the sum of the forces and changing velocity are said to be observers in inertial reference frames.

This is clearly shown by what observer A noticed. There was a relative motion between the book and the car as she pointed out, making her to be in an inertial reference frame.

Similarly, observers in inertial reference frames can also explain the changes in velocity of objects by considering the forces exerted on them by other objects.

This is shown by observer B as he is able to notice how the force of the car affects the velocity of the book.

Observer C is actually in a non-inertial reference frame, as newtons law of force motion relationship are no longer observed. This occurs in the non inertial reference frame.

7 0

3 years ago