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Svetllana [295]
4 years ago
7

A student finds an unlabeled bottle of liquid under

Physics
2 answers:
andrezito [222]4 years ago
7 0

The answer is C. Adding some of the unknown liquid to red litmus paper.

s344n2d4d5 [400]4 years ago
6 0

Answer:

C. Adding some of the unknown liquid to red litmus paper.

Explanation:

Since the student doesn't know what the liquid is, it is not safe to experiment with it by boiling, cooling, or adding water to it. The safest option would be to add a small bit of the liquid to the litmus paper, which will identify the liquid as neutral, basic, or acidic.

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How far does an object move if a 20 N force is applied to it doing 40 J of work?
Neporo4naja [7]

Answer: The object moved 2 metres away

Explanation:

Given that the

Force applied F = 20 N

Work done W = 40 J

From the definition of workdone which state that: product of force and distance

W.D = F × S

Where S = distance

S = W.D/F

S = 40/20 = 2 metres

The object moved 2 metres away.

3 0
3 years ago
Which best explains how fiber-optic technology has improved communication?
Gelneren [198K]

Answer:

B. It has allowed for faster transmission of Internet signals.

Explanation:

i took the test on engenuity

8 0
3 years ago
Read 2 more answers
Blood pressure is usually expressed by two numbers. What are those two numbers called?
sergiy2304 [10]
Top number is  your <span>systolic </span><span>pressure 

Bottom number is your </span>diastolic<span> </span><span> </span>pressure<span> 

Hoped this helped

</span>
8 0
3 years ago
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A new "smart" refrigerator has been designed with sensors that send information to the manufacturer about the refrigerator's use
zysi [14]

Answer:

internet of things.

Explanation:

The mention Smart refrigerator with information communication system to both manufacturer as well as the customer is an example of internet of things.

The interconnection via internet of computing devices embedded in everyday objects, enabling them to send and receive data. It is also the ability to transfer data without human to human or computer to human interaction.

6 0
4 years ago
A uniform disk with a mass of 5.0 kg and diameter 30 cm rotates on a frictionless fixed axis through its center and perpendicula
Marina86 [1]

Answer:\alpha =10.66 rad/s^2

Explanation:

Given

mass of disk m=5 kg

diameter of disc d=30 cm

Force applied F=4 N

Now this force will Produce  a  torque of magnitude

T=F\cdot r

T=4\dot 0.15

T=0.6 N-m

And Torque is given Product of moment of inertia and angular acceleration (\alpha )

T=I\cdot \alpha

Moment of inertia for Disc I= \frac{Mr^2}{2}

I=0.05625 kg-m^2

0.6=0.05625\cdot \alpha

\alpha =10.66 rad/s^2

3 0
3 years ago
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