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mr_godi [17]
3 years ago
9

What are the cons of using a cup made of plastic?

Physics
1 answer:
mafiozo [28]3 years ago
3 0
-Most are not biodegradable or recyclable 
-can contain harmful materials in long-term use

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A car, travelling at a speed of 30 m/s in a straight line, brakes and decelerates at a uniform rate of 2 m/s2. How much further
AURORKA [14]

Answer:

You are finding acceleration, so it would be 15 m/s2

Explanation:

30 divided by 2

3 0
2 years ago
Three identical springs, each with stiffness 1200 N/m are attached in series (that is, end to end) to make a longer spring to ho
OLga [1]
<h2>Answer:</h2>

400N/m

<h2>Explanation:</h2>

When n identical springs of stiffness k, are attached in series, the reciprocal of their equivalent stiffness (1 / m) is given by the sum of the reciprocal of their individual stiffnesses. i.e

\frac{1}{m} = ∑ⁿ₁ [\frac{1}{k_{i}}]          -----------------------(i)

That is;

\frac{1}{m} = \frac{1}{k_{1}} + \frac{1}{k_{2}} + \frac{1}{k_{3}} + . . . + \frac{1}{k_{n}}      -------------------(ii)

If they have the same value of stiffness say s, then equation (ii) becomes;

\frac{1}{m} = n x \frac{1}{s}           -----------------(iii)

Where;

n = number of springs

From the question,

There are 3 identical springs, each with stiffness of 1200N/m and they are attached in series. This implies that;

n = 3

s = 1200N/m

Now, to calculate the effective stiffness,m, (i.e the stiffness of a longer spring formed from the series combination of these springs), we substitute these values into equation (iii) above as follows;

\frac{1}{m} = 3 x \frac{1}{1200}

\frac{1}{m} = \frac{3}{1200}

\frac{1}{m} = \frac{1}{400}

Cross multiply;

m = 400N/m  

Therefore, the stiffness of the longer spring is 400N/m

7 0
3 years ago
Which of the following is a function of the cardiovascular system?
ioda

Answer:

D

Explanation:

The CV system does all of the above

4 0
1 year ago
An unstable atomic nucleus of mass 1.82 10-26 kg initially at rest disintegrates into three particles. One of the particles, of
Rainbow [258]

Answer:

Explanation:

Using Conservation of momentum (total final momentum of system is)

m1•v1f + m2•v2 f + m3•v3 f=0

and it must be zero to equal the original momentum( since the original body is at rest).

Given that

original mass M=1.82×10^-26

First disintegrate mass m1=5.18×10^-27kg

In y direction V1f=6×10^6 I'm/s

Second disintegrate mass m2=8.5×10^-27kg

In x direction V2f=4×10^6 im/s

Then the third disintegrate will be

m3=M-m1-m2

m3=1.82×10^-26-5.18×10^-27-8.5×10^-27

m3=4.52×10^-27

And the velocity is unknown

Now using the formula above

m1•v1f + m2•v2 f + m3•v3 f=0

m3•V3f= - m1•v1f - m2•v2 f

4.52E-27V3f=-5.18E-27×6E6j - 8.5E-27×4E6 i

Divide thorough by 4.52E-27

V3f= - 6.88×10^6j - 7.52×10^6i

V3f= - 7.52×10^6i - 6.88×10^6j

The final velocity of the third mass disintegrate is 6.88×10^6j - 7.52×10^6i m/s

3 0
2 years ago
F(x)=<br><img src="https://tex.z-dn.net/?f=f%7Bx%7D%20%3D%20%20%5Csqrt%7Bx%7D%20" id="TexFormula1" title="f{x} = \sqrt{x} " alt
Ronch [10]
What’s the question about ?
6 0
2 years ago
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