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2 years ago

You are driving on the interstate and see a sign that says the speed limit is 50 miles per hour.

Physics

2 answers:

olganol [36]2 years ago

7 0

Answer:

Explanation:

Kazeer [188]2 years ago

4 0

Answer:

True

Explanation:

This is because an interstate is a road that connects 2 states. For example in the US Alabama-Georgia. Now its like a highway so the appropriate Measurement would be miles. (Resulting in the answer being True)

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A ductile metal wire has resistance R. What will be the resistance of this wire in terms of R if it is stretched to three times

Ira Lisetskai [31]

Answer:

Explanation:

We know that the resistance is $R=\rho *\frac{L}{A}$ .

If we stretch the wire to a new length L2 = 3L, the cross-sectional area will also change. If the cross-sectional area doesn't change throughout the wire, we can say that:

Volume = L*A = 3L * A2 being A2 the new area after stretching the wire.

Since the volume remains the same we conclude that A2 = A/3

With this information, we calculate the new resistance:

$R2=\rho *\frac{L2}{A2}=\rho *\frac{3*L}{A/3}=\rho * 9 * \frac{L}{A}$

Since $R=\rho *\frac{L}{A}$ , and by simple inspection of the previous equation, we get:

R2 = 9*R

6 0

2 years ago

The answers to these please

Mrrafil [7]

Answer:

11. Depression

Explanation:

11. Many people face depression and don't know how to fix or deal with the problem in a healthy way.

12. It can be controlled by the stuff you eat for example if you don't eat lunch you may be hungry which is bad plus the depression.

5 0

2 years ago

How many times smaller is the moon than earth?

Yuki888 [10]

The moon has approximately 1/4 of earths diameter, 1/50 of earths volume and 1/80 of earths mass

3 0

2 years ago

Read 2 more answers

If ice has a density of.92g/cm, what is the volume of 1.8 kilograms of ice?

steposvetlana [31]

Given:
Density = .92 g / cm³
Volume = 1.8 kg
= (1.8 * 1000) grams
= 1800 grams
Now,
$Density (d) = \frac{Mass (m)}{volume(v)}$

$volume (v)= \frac{mass(m)}{density(d)}$

$volume (v)= \frac{1800}{.92}$

$volume (v)= 1956.521739$

$volume (v)= 1956.5~ cm^{3}$

So, the volume of 1.8 kg of ice is 1956.5 cm³

5 0

2 years ago

R,=4.00 R, = 1000.00

lisabon 2012 [21]

Answer:1000.00

Explanation:

6 0

2 years ago