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DedPeter [7]
3 years ago
10

How many Oxygen (O) atoms are in the following? H2O + CO2 4 3 2

Physics
1 answer:
Contact [7]3 years ago
6 0
There are 3 oxygen atoms
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A person driving her car at 48 km/h approaches an intersection just as the traffic light turns yellow. She knows that the yellow
trasher [3.6K]

Answer:

She must stop the car  before interception, distance traveled 12.66 m

Explanation:

We will take all units to the SI system

Vo = 48Km / h (1000m / 1Km) (1h / 3600s) = 13.33 m / s

V2 = 70 Km / h = 19.44 m / s

We calculate the distance traveled before stopping

X = Vo t + ½ to t²

Time is what it takes traffic light to turn red  is t = 2.0 s

X = 13.33 2 + 1.2 (-7) 2²

X = 12.66 m

It stops car before reaching the traffic light turning to red

Let's analyze what happens if you accelerate, let's calculate the acceleration of the vehicle

     V2 = Vo + a t2

      a = (V2-Vo) / t2

      a = (19.44-13.33) /6.6

      a = 0.926 m / s2

This is the acceleration to try to pass the interception, now let's calculate the distance it travels in the time the traffic light changes from yellow to red (t = 2.0 s)

X = Vo t + ½ to t²

X = 13.33 2 + ½ 0.926 2²

X = 28.58 m

Since the vehicle was 30 m away, the interception does not happen

4 0
3 years ago
Suppose that the acceleration of a model rocket is proportional to the difference between 100 ft/sec and the rocket's velocity.
sp2606 [1]

Answer:

Explanation:

initial velocity, u = 0

final velocity, v = 80 ft/s

acceleration, a = 150 ft/s²

Let the time taken is t.

v = u + at

80 = 0 + 150 x t

t = 0.53 second

3 0
3 years ago
please explain!! 15. You want to calculate the displacement of an object thrown over a bridge. Using -10 m/s2 for acceleration d
qwelly [4]

I will be making the assumption that you aren't actually really throwing the object over a bridge but rather dropping it as no initial velocity is actually given, which is required to do this problem. This will mean that initial velocity will be zero in this case.

First off, let's state all of the information we are given (the five kinematic quantities)

v₁ = 0 m/s

v₂ = cannot be determined

Δd = ?

Δt = 8 seconds

a (g) = 10 m/s² [down]

Now analyzing what we have, we can determine that we have 3 given quantities, 1 we must solve for, and 1 that cannot be found given our current information.

The five kinematic equations are useful because they all contain four kinematic quantities, and with different combinations too. In this case, we have three (v₁, Δt, a) and have to solve for Δd. The kinematic equation that fits with this would be:

Δd = v₁Δt + 0.5(a)(t)²

We can plug in our given values now.

Δd = 0 m/s(8 s) + 0.5(10 m/s²)(8 s)²

Δd = 0.5(10 m/s²)(8 s)²

Δd = <u>3</u>20 m

Therefore, the total displacement of the object would have to be 300m. (Due to significant digit rules)

7 0
3 years ago
What is the specific heat of a 93g steel table contains 1124J of heat energy as its temperature drops 25C?
alekssr [168]

Answer:

2.335c

Explanation:

3 0
3 years ago
Use the paragraph to answer the question.
nadezda [96]

The characteristic of science that is best exemplified by the paragraph presented is "It is falsifiable and reproducible."

<h3>What is science?</h3>

Science can be mostly defined as a set of methods and principles that aim at objectively understanding and explaining the phenomena that occurs in the world.

These set of methods and principle lead to theories and laws that describe how a specific phenomenon occurs.

<h3>What does "It is falsifiable and reproducible"?</h3>

This is a basic principle that implies hypotheses about a specific phenomenon can be tested using experiments and this can lead to either the confirmation of the hypothesis or dispproved. Moreover, same experiments can be used and these will have similar results.

This principle matches the paragraph because the same experiment leads to same results. Moreover, previous ideas about a phenomenon were disproved.

Learn more about science in: brainly.com/question/12842883

#SPJ1

4 0
1 year ago
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