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Elden [556K]
3 years ago
10

What is a closed-loop system?

Chemistry
1 answer:
chubhunter [2.5K]3 years ago
7 0

Answer:

a closed-loop system is a control system which uses the concept of an open loop system as its forward path but has one or more feedback loops

Explanation:

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An unknown substance has a density of 56 g/cm3. Its volume is 3.5 cm.
postnew [5]

Answer:

<h3>The answer is 196 g</h3>

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question we have

mass = 56 × 3.5

We have the final answer as

<h3>196 g</h3>

Hope this helps you

3 0
3 years ago
A car with a mass of 1,500 kg is traveling at a speed of 30 m/s. What force must be applied to stop the car in 3 seconds ?
saw5 [17]

Yo sup??

we can solve this problem by applying Newton's 2nd law

F*t=Δp

p=momentum

pi=mu=1500*30

pf=mv=m*0=0

Therefore

F*3=1500*30

F=15000 N

Hope this helps.

5 0
3 years ago
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igor_vitrenko [27]

Answer: mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm

Explanation:

8 0
3 years ago
What element in the fourth period is an exception to the Aufbau principle? a. Li c. Ca b. Cr d. Br
gulaghasi [49]

The fourth period contains 18 elements, beginning with potassium and ending with krypton. As a rule, period 4 elements fill their 4s shells first, then their 3d and 4p shells, in that order; however, there are exceptions, such as chromium.

Cr. I think

4 0
4 years ago
Please help me with this question!<br> question number 2 only! PLEASE!!!
jeka57 [31]

Answer:

I'm not completely sure but possibly (HCO³)

6 0
4 years ago
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