Total mass of the Sun = 2x10^30kg

<span>So 76% of that = (2x10^30kg)*(0.76) = 1.52x10^30kg ----> total amount of Hydrogen i</span><span>f only 12% of that is used for fusion, then (1.52x10^30kg)*(0.12) = 1.82x10^9kg</span>

8 0

3 years ago

A snail moves 18 millimeters every 24 seconds what is the snails rate of speed

Nataly_w [17]

The speed of the snail is given by:

$v=\frac{S}{t}$

where S is the distance covered by the snail and t the time taken.

The snail in the problem moves by S=18 mm in t=24 s, therefore its speed is

$v=\frac{S}{t}=\frac{18 mm}{24 s}=0.75 mm/s$

3 0

3 years ago

What is the final velocity, in meters per second, of a freight train that accelerates at a rate of 0.085 m/s2 for 7.5 min, start

Llana [10]

Answer:

$v_f=41.65\frac{m}{s}$

Explanation:

The final velocity is given by the following kinematic equation:

$v_f=v_0+at$

Here, $v_0$ is the initial velocity, a is the body's acceleration and t is the motion time. We have to convert the time to seconds:

$7.5min*\frac{60s}{1min}=450s$

Now, we calculate the final velocity:

$v_f=3.4\frac{m}{s}+(0.085\frac{m}{s^2}(450s))\\v_f=41.65\frac{m}{s}$

4 0

3 years ago