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romanna [79]
3 years ago
9

Which type of disease cannot be spread from one person to another

Physics
1 answer:
aniked [119]3 years ago
7 0

I believe that would be D.

Cardiovascular disease generally refers to conditions that involve narrowed or blocked blood vessels that can lead to a heart attack, chest pain, or stroke. Which it has nothing to do with being infectious.

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An extended period of well-below-average temperatures is known as a
jasenka [17]
Well, I think it kinda depends on how long the "extended period" is.

If the extended period is a week, a month, or a few months,
then I'd call it a 'cold wave'.

If the extended period is like 100 years or more, then you're
starting to talk 'ice age'.
3 0
3 years ago
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Theories have both an explanatory and a predictive function. <br> a. True <br> b. False
Simora [160]
Theories have both an explanatory an a predictive function. True
3 0
3 years ago
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The Earth orbits the Sun with a period of 3.16 x 107 seconds (1 year!) at a distance of 1.5 x 1011 m. The mass of the Earth is 6
SVETLANKA909090 [29]

Answer:

a) M = 2  10³⁰ kg ,  b)    T_{m} = 5.81 10⁷ s

Explanation:

a) For this exercise let's use Newton's second law where force is the law of universal gravitation and acceleration is centripetal

           G m M / R² = m a

            a = v² / R

             G M / R = V²

The orbit of the two planets is approximately circular, therefore the velocity module (speed) is constant

            v = d / t

The distance is the length of the circular orbit

           d = 2π R

          G M / R = 4π² R² / T²

          G M T² = 4π² R³

Let's write this equation for each planet

For the earth

The period is T = 3.16 10⁷ s and the radius of the orbit R = 1.5 10¹¹ m, let's calculate the mass of the sun

         M = 4π² R³ / G T²

         M = 4π² (1.5 10¹¹)³ / (6.67 10⁻¹¹ (3.16 10⁷)²)

         M = 133.24 10³³ / 66.60 10³

         M = 2  10³⁰ kg

b) For this part we write this equation for the two points

For the earth

         T_{E}² = (4π² / G M)  R_{E}³

For mars

          T_{m}² = (4π² / G M)  R_{m}³

Let's divide the two expressions

         T_{m}² /  T_{E}² =  R_{m}³ /  T_{E}³

They indicate that the orbit of Mars is  R_{m} = 1.5  R_{E}

        T_{m}² /  T_{E}² = (1.5  R_{E} /  R_{E})³

        T_{m}² =  T_{E}² 1.5³

        T_{m}² = (3.16 10⁷)²  1.5³

        T_{m} = √ (33.70 10¹⁴)

        T_{m} = 5.81 10⁷ s

5 0
4 years ago
A person pushes a 10 kg box from rest and accelerates it to a speed of 4 m/s with a constant force. If the box is pushed for a t
lutik1710 [3]

The box is accelerated from rest to 4 m/s in a matter of 2.5 s, so its acceleration <em>a</em> is such that

4 m/s = <em>a</em> (2.5 s)   →   <em>a</em> = (4 m/s) / (2.5 s) = 1.6 m/s²

Then the force applied to the box has a magnitude <em>F</em> such that

<em>F</em> = (10 kg) (1.6 m/s²) = 16 N

7 0
3 years ago
Find what is the ratio of the internal energy of hydrogen UB. To the internal energy of helium UJ for two moles of hydrogen and
finlep [7]

Answer:

Ration of internal energy of hydrogen to the internal energy of helium is equal to \frac{5}{6}

Explanation:

As we know

degree of freedom of hydrogen is 5

Degree of freedom of helium is 3

Internal energy of hydrogen

\frac{5}{2} * 2 * RT = 5 *RT

Internal energy of helium

\frac{3}{2} * 4 * RT = 6 *RT

Ration of internal energy of hydrogen to the internal energy of helium is equal to \frac{5}{6}

4 0
4 years ago
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