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4 years ago

Sarah added sugar to her iced tea, but it is not dissolving very quickly. Which can Sarah do to make the sugar dissolve faster?

Physics

2 answers:

saw5 [17]4 years ago

5 0

Heat the tea because the heat make the tea's particles move around more dissolving the sugar quicker

lyudmila [28]4 years ago

5 0

Heat the iced tea. It will give the sugar molecules more energy which will make them pull apart to be absorbed by the liquid faster. The more energy the sugar has, the farther apart the atoms will be, therefore easier to pull apart and be absorbed.

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A 4-kilogram ball moving at 8 m/sec to the right collides with a 1-kilogram ball at rest. After the collision,

elena-14-01-66 [18.8K]

Conservation of momentum: total momentum before = total momentum after

Momentum = mass x velocity

So before the collision:
4kg x 8m/s = 32
1kg x 0m/s = 0
32+0=32

Therefore after the collision
4kg x 4.8m/s = 19.2
1kg x βm/s = β
19.2 + β = 32

Therefore β = 12.8 m/s

4 0

4 years ago

He measures 100ml of hot water (90 degrees) using a graduated cylinder he places this sample in the refrigerator to cool it down

Rasek [7]

The volume of the water, which was initially 100mL changed to 96mL after refrigeration because the volume of water reduces when cool.

<h3>Why does water change in volume?</h3>

Water is a substance that is known for its unique characteristics that makes it stand out among all other liquids.

One notable feature of water is it's ability to become denser when subjected to cooler temperatures i.e. water is more dense when cold.

As water cools or becomes less warm, it contracts and decreases in volume. When water decreases in volume, it becomes more dense.

Therefore, according to this question, it can be said that the volume of the water, which was initially 100mL changed to 96mL after refrigeration because the volume of water reduces when cool.

Learn more about water volume at:brainly.com/question/17322215

#SPJ1

4 0

2 years ago

A rope is vibrating in such a manner that three equal-length segments are found to be vibrating up and down with 321 complete cy

kolbaska11 [484]

Answer:

<u>2.48 m</u> is the length of the rope.

Explanation:

Cycle period is 321

Time is 20 second

Wave travels at speeds = 26.4 m/s

We know that,

$\text { Frequency }=\frac{1}{T} \text { (For one cycle) }$

Frequency required for 321 complete cycle in 20 seconds is

$\text { Frequency }(f)=\frac{321}{20}$

Frequency = 16.05 hz

We know that,

$\text { Wavelength }=\frac{\text { wave velocity }}{\text { frequency }}$

$\lambda=\frac{v}{f}$

λ = wavelength, the distance between "wave crests" (m)

v = wave velocity, the "speed" that waves are moving in a direction (m/s)

f = frequency, (cycles/ or Hz)

$\lambda=\frac{26,4}{16.05}$

λ = 1.65 m

As per given question "length of the rope has three equal length segment"

$\mathrm{Length of the rope}=\frac{3}{2} \lambda$

$\mathrm{Length of the rope }=\frac{3}{2} \times 1.65$

$\mathrm{Length of the rope}=1.5 \times 1.65$

Length of the rope = 2.48 m

Therefore, length of the rope is <u>2.48 m.</u>

7 0

3 years ago

The strength of the electric field 0.5 m from a 6 uC charge is

Triss [41]

Answer:

E= 2.158× 10*5N/C

Explanation:

K= 8.99×10*9, q= 6×10*-6C, d= 0.5m

E= kq/d*2

E= (8.99×10*9× 6×10*-6)/0.5*2

E= 215760

E= 2.158 ×10*5N/C

5 0

3 years ago

HELP!!!!!!!!!

Irina18 [472]

Answer:

4.096 kW

Explanation:

Applying,

P = Fvcos∅................. Equation 1

Where P = Power of the motor, F = Force exerted on the motor, v = Velocity, ∅ = angle.

From the question,

Given: F = 500 N, v = 10 m/s, ∅ = 35°

Substitute these values into equation 1

P = 500×10×cos35°

P = 4095.8 W

P = 4.096 kW

Hence the power rating of the moto in kW is 4.096 kW

8 0

3 years ago