A _____ is a model of an atom in which each dot represents a valence electron

PSYCHO15rus [73]

That’s kinda messed up ⬆️

8 0

3 years ago

Owen and Dina are at rest in frame S' , which is moving at 0.600 c with respect to frame S . They play a game of catch while Ed

Doss [256]

The time interval with respect to Ed is 4.88 ×10³ s.

A frame of reference is a set of reference points—geometric points whose positions are known mathematically and physically—that define the origin, orientation, and scale of an abstract coordinate system.

If a body does not continuously adjust its position in relation to its environment throughout the course of time, it is said to be at rest.

In the frame S', Dina and Owen are at rest.

The speed of the ball with respect to Owen, u =0.800c

The speed of the frame S' with respect to frame S, v = 0.600c

Distance between Dina and Owen, L(p) = 1.8 × 10¹² m

Speed of light, c = 3 × 10⁸ m/s

Now, for time interval using the Lorentz transformation equation:

Δt = 1 / [ √( 1 - (v²/c²)] ( Δt' + (vΔx'/c²))

Now, v = 0.6c as S' is moving with respect to frame S.

Hence, the time take is:

Δt = 1 / [ √( 1 - ((0.6c)²/c²)] ( 7.5 ×10³ + [(-0.6c)(1.8 × 10¹²)/c²))

Δt = 1.25( 75000 - 3600)

Δt = 4.88 ×10³ s

The total time taken by the ball with respect to Ed is 4.88 ×10³ s.

Learn more about the frame of reference here:

brainly.com/question/10962551

#SPJ4

5 0

2 years ago

50 pounds of a working substance undergoes a non-flow process. The internal energy at the start of the process is 89 Btu/lbm and

serg [7]

Applying the first law of thermodynamics, we know that the heat transferred is equivalent to the work done and the internal energy of the bodies.

In mathematical terms this can be expressed as

$Q = W+\Delta U$

According to the statement, the work is carried out on the substance, therefore, the work will be negative (by convention)

$Q = -350+50lbm(150-89)Btu/lbm$

$Q = 2700Btu$

Therefore 2700Btu were added as heat to the substance.

The value per unit of mass would be

$\dot{Q} = \frac{2700}{50}$

$\dot{Q} = 54Btu/lbm$

Therefore it was added around to 54Btu/lbm

4 0

3 years ago

[OSS.01]Which of these statements is most likely correct about Newton's law on gravity?

inessss [21]

I think the first one is the correct answer

note: are not always 100% true

4 0

4 years ago

Read 2 more answers

TWO QUESTIONS

Ksju [112]

Answer to the first question-

Ans- The net force of the runner will be 280 N

Data obtained from the question-

A running force to the right - 305 N
Air resistance force to the left - 35 N

Net force?

The net force of the runner could be obtained by -

Net force = Exerting force - resistance force

Net force = 305 - 35

Net force = 280 N

So we can conclude that the runner's net force is 280 N

Answer to the second question-

Ans- The book will stay at rest

Explanation-

As we can see that the pushing force applied to the book is 3 N and the frictional force applied by the table is 7 N, so due to the overpowering frictional force in the opposite direction of the pushing force, the book will remain on its place until and unless a pushing force more significant than 7 N is applied on the book, in that case, the book will start moving in the right direction or in the direction of the pushing force.

To learn more about Forces,

brainly.com/question/25239010

5 0

1 year ago