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IRISSAK [1]
3 years ago
15

r was thirsty and decided to mix up a pitcher of lemonade. She put lemon juice, water, and sugar into a pitcher and stirred it t

o create this wonderful new drink. How could Taylor decide if she just created a mixture or a compound?
Physics
2 answers:
slamgirl [31]3 years ago
7 0
She could tell by how many components she put in. The compounds, are like the ingredients. The Mixture is all the ingredients stirred together.
frozen [14]3 years ago
7 0

Answer: Taylor created a mixture.

Explanation: When lemon juice, water and sugar are mixed, they do not combine chemically and their chemical composition does not change.They can be separated by using physical means and thus it is only a physical change.

A compound is formed by chemical combination of molecules in a definite proportion by mass.Compounds can not be separated into its constituents using physical processes.

Thus Taylor has created a mixture and not a compound.

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A skater has rotational inertia 4.2 kg.m2 with his fists held to his chest and 5.7 kg.m2 with his arms outstretched. The skater
Fynjy0 [20]

Answer:

6.13428 rev/s

Explanation:

I_f = Final moment of inertia = 4.2 kgm²

I = Moment of inertia with fists close to chest = 5.7 kgm²

\omega_i = Initial angular speed = 3 rev/s

\omega_f = Final angular speed

r = Radius = 76 cm

m = Mass = 2.5 kg

Moment of inertia of the skater is given by

I_i=I+2mr^2

In this system the angular momentum is conserved

L_f=L_i\\\Rightarrow I_f\omega_f=I_i\omega_i\\\Rightarrow \omega_f=\dfrac{I_i\omega_i}{I_f}\\\Rightarrow \omega_f=\dfrac{(5.7+2\times 2.5\times 0.76^2)3}{4.2}\\\Rightarrow \omega_f=6.13428\ rev/s

The rotational speed will be 6.13428 rev/s

5 0
3 years ago
In order for an object to accelerate, a forcegravityfrictiona swing must be applied.
vodomira [7]
<span>In order for an object to accelerate, a <u>force</u> must be applied. It follows Newton’s second law of motion where it states that a body at rest remains at rest unless a force is acted upon it. When you move an object, you are exerting a force onto it. By exerting a force on the object, you are actually displacing it from its initial position. You cannot apply force to the object without altering its position. Keep in mind that when you exert work, you are exerting energy too. </span>
4 0
3 years ago
The graph above shows the position and time calculate the velocity of the particle from T=0s to T=4s?
zzz [600]

Answer:

The velocity of the particle from T = 0 s to T = 4 s is;

0.5 m/s

Explanation:

The given parameters from the graph are;

The initial displacement (covered) at time, t₁ = 0 s is x₁ = 1 m

The displacement covered at time, t₂ = 4 s is x₂ = 3 m

The graph of distance to time, from time t = 0 to time t = 4 is a straight line graph, with the velocity given by the rate of change of the displacement to the time which is dx/dt which is also the slope of the graph given as follows;

The \ slope \ of \ the \ displacement \ time \ graph, \ m =velocity, \ v= \dfrac{x_2 - x_1}{t_2 - t_1}

Therefore, \ the \ velocity \ of \ the \ particle \ v  = \dfrac{3 \  m - 1 \ m}{4 \ s - 0 \ s}  = \dfrac{2 \ m}{4 \  s} = \dfrac{1}{2} \ m/s

The velocity of the particle from t = 0 s to t  = 4 s = 1/2 m/s = 0.5 m/s.

3 0
2 years ago
What happens to energy “lost” during an energy transformation? A. It turns into heat energy. B. It turns into kinetic energy. C.
Anettt [7]

Answer:

I think it turns into heat (thermal) energy if I'm right

4 0
3 years ago
If you drop a bowling ball, a tennis ball, and a feather from the top of a tall building at the same time which one will hit the
allochka39001 [22]
D) they will all hit the ground at the same time. In the context that there is no air resistance and each object is in free fall, then they will have the same acceleration rate.
5 0
3 years ago
Read 2 more answers
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