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Tatiana [17]
3 years ago
11

Can y’all please help

Physics
1 answer:
TiliK225 [7]3 years ago
5 0

Answer:

<em>The cat's speed when it slid off the table was 2.53 m/s</em>

Explanation:

<u>Horizontal Motion</u>

When an object is thrown horizontally at a speed v, from a height h, it describes a curved path ruled by gravity, until it hits the ground.

the range or maximum horizontal distance traveled by the object can be calculated as follows:

\displaystyle d=v\cdot\sqrt{\frac  {2h}{g}}

The situation described in the problem fits into the concept of a horizontal launch when the cat slides off the table and gets to the ground some distance ahead.

It's given the range as d=1.3m and the height h=1.3 m, thus we can find the cat's speed by solving the equation for v:

\displaystyle v=d\cdot\sqrt{\frac  {g}{2h}}

Where g=9.81\ m/s^2

Substituting values:

\displaystyle v=1.3\cdot\sqrt{\frac  {9.81}{2\cdot 1.3}}

\displaystyle v=1.3\cdot\sqrt{\frac  {9.81}{2.6}}

Calculating:

v = 2.53 m/s

The cat's speed when it slid off the table was 2.53 m/s

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1)The position change of almost any manually operated room light switch.

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3 years ago
The half life of carbon-14 is 5730 years. How old is a bone if it presently contains 0.3125 g of carbon-14, but it was estimated
TiliK225 [7]

The age of the bone is 45840 years.

We'll begin by calculating the number of half-lives that has elapsed.

Amount remaining (N) = 0.3125 g

Initial amount (N₀) = 80 g

<h3>Number of half-lives (n) =? </h3>

N × 2ⁿ = N₀

0.3125 × 2ⁿ = 80

Divide both side by 0.3125

2ⁿ = 80 / 0.3125

2ⁿ = 256

2ⁿ = 2⁸

<h3>n = 8</h3>

Thus, 8 half-lives has elapsed

Finally, we shall determine the age of the bone.

Half-life (t½) = 5730 years

Number of half-lives (n) = 8

<h3>Time (t) =? </h3>

t = n × t½

t = 8 × 5730

<h3>t = 45840 years </h3>

Therefore, the age of the bone is 45840 years.

Learn more on half-life: brainly.com/question/15900105

5 0
3 years ago
Students are using the experimental setup shown in the image in which the two ends of a string are attached to a car and to a ha
AlekseyPX

The Newton's second law and kinematics allows to find the result of the error when placing the masses in the car is:

  • Acceleration decreases.
  • The plot of position vs. time squared is still linear, but the slope is less.

     

Newton's second law gives a relationship between the net force, mass and acceleration of the body

      F = ma

      a = \frac{F}{m}

Where F is the force, m the mass and the acceleration

 

Kinematics studies the motion of bodies, looking for relationships between position, velocity, and acceleration.

         x = v₀ t + ½ a t²

In the experiment, the position and time of the car are measured, starting from rest in each experiment.

        x = ½ a t²

Let's substitute

      x =  ½ ( \frac{F}{m} ) t²

This is the equation that the students should graph, a graph of the position versus time squared can be made to obtain a line.

The slope of the line is the acceleration of the car, which is related to the force that is the weight of the hanging mass.

When the student makes the mistake of placing the mass on the car, the acceleration decreases therefore in a graph the position values ​​are smaller for each time.

The linearity of the graph is maintained, but when calculating the slope it gives lower values.

In conclusion using Newton's second law and kinematics we can find the result of the error when placing the masses on the car is:

  • Acceleration decreases.
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Learn more here: brainly.com/question/11298125

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