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neonofarm [45]
3 years ago
15

A ball at rest starts rolling down a hill with a constant acceleration of 3.2 meters/second. What is the final velocity of the b

all after 6.0 seconds?
Physics
1 answer:
a_sh-v [17]3 years ago
5 0
19.2 meters/second^2 would be the correct answer.

Try multiplying 3.2 meters/second^2 by 6 and you will receive the answer provided above. If you have any further questions, let me know!
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Calculate the vapor pressure for a mist of spherical water droplets of radius 3.70×10−8m surrounded by water vapor at 298 K. The
poizon [28]

Answer:

The vapor pressure for a mist is P= 25.92\ Torr

Explanation:

From the question we are given that

        The radius is  r = 3.70 *10^{-8} m

        The temperature is T  = 298K

       The vapor pressure of water P_o = 25.2\ Torr

      The density of water is  \rho = 998 kg.m^{-3}

      The surface tension of water is \sigma  = 71.99 m N \cdot m^{-1}

Generally the equation of that is mathematically represented as

                            ln (\frac{P}{P_0} )  = \frac{2 \sigma M}{r \rho RT}

 Where  P is the vapor pressure for mist

               R is the  ideal gas constant = 8.31

      making P the subject in the formula

    P = e^ {\frac{2 \sigma M}{r \rho RT}} * P_0

        = e^{\frac{2 *(0.07199)(0.018)}{(3.70*10^{-8})(998)(8.31)(298)} } * 25.2

        P= 25.92Torr

               

4 0
3 years ago
Estimate how long the sun would last if it were merely a huge fire that was releasing chemical energy. Assume that the sun begin
stepan [7]

Answer:

≅ 17000 years or 1.7 x 10⁴ years

Explanation:

time= total energy/power

=  (10⁸J/kg)(2x10³⁰ kg) / 3.8 x 10²⁶ J/s

 = 526,315,789,473 s

=  16689 years

≅ 17000 years or 1.7 x 10⁴ years

7 0
3 years ago
Coulomb’s Law relates which of the following?
Verdich [7]
There's nothing on the list you provided that's related to Coulomb's Law.
8 0
4 years ago
3. If atoms are mostly empty space, why can't<br> we walk through walls?
Serhud [2]

Answer:

Good question

Explanation:

The reason is that walls are made up of more than just atoms. Walls are built up from many things, so with this being said we cannot walk through the walls

PPs why do or should anyone want to walk through walls?

7 0
3 years ago
Write the equation for Newton's law of universal gravitation
serious [3.7K]

Answer:

This was done by measuring the acceleration due to gravity as accurately as possible and then calculating the mass of Earth M from the relationship Newton's universal law of gravitation gives mg=GmMr2 m g = G m M r 2 , where m is the mass of the object, M is the mass of Earth, and r is the distance .

7 0
3 years ago
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