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Gala2k [10]
3 years ago
15

Opal adds 25 grams of salt to a one-liter glass beaker filled up to its volume mark with pure water. She stirs the water until t

he salt crystals disappear. She shows the beaker to Teddy and tells him what she did. Then, she challenges him to make a correct statement about the beaker's contents. Which one of the four choices below is NOT correct?
A. It is a homogeneous mixture
B. It is a solution
C. Water is the solvent and salt is the solute
D. A chemical change has occurred
Physics
1 answer:
Mars2501 [29]3 years ago
5 0

By what i know i think that the answer would be A a homogeneous mixture.

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Terra tosses a 0.20 kg volleyball straight up at 10.0 m/s. how high does it go?
Sliva [168]

Answer:

5.1 meters

Explanation:

Terra tosses a 0.20kg volleyball up at at a speed of 10 m/s

The height can be calculated as follows

= v^2/2g

= 10^2/2×9.8

= 100/19.6

= 5.1 meters

Hence the height is 5.1 meters

5 0
3 years ago
Which statement about thin lenses is correct? In each case, we are considering only a single lens. A. A diverging lens always pr
Alexus [3.1K]

Answer:

E) true. The image is always virtual and erect

Explanation:

In this exercise we are asked to find the correct statements,

for this we can use the constructor equation

     1 / f = 1 / p + 1 / q

where f is the focal length, p the distance to the object and q the distance to the image

In diverging lenses, the focal length is negative and the image is virtual and erect

In convergent lenses, the positive focal length, if the object is farther than the focal length, the image is real and inverted, and if the object is at a shorter distance than the focal length, the image is virtual and straight.

With this analysis let's review each statement

A) False. The image is right

B) False. The type of image depends on where the object is with respect to the focal length

C) False. The real image is always inverted

D) False. The image is always virtual

E) true. The image is always virtual and erect

6 0
3 years ago
The lower the frequency the _____ the pitch sound.
stepan [7]
The lower the frequency the lower the pitch sound.
8 0
3 years ago
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A person, with a mass of 50.0 kg, stands on a weighing scale in a lift which is moving
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Answer:

D

Explanation:

Because I just had that answer

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What is the distance a bullet will travel when launched at 166 meters per second for 5.75seconds?
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