The answer to this question is the first choice. In the hydrogen fusion process, the first step involves the collision of two protons to emit an antielectron and a neutrino. Only the first choice of
1_1H + 1_1H →2_1H + e^+ + v + energy
reflects this process. A hydrogen ion with a mass of one and number protons of 1 means a proton.
The mass of one cubic meter of water in kilograms is 1 kg.
This is a conversions case. First, we must determine how many cubic centimeters there are in a cubic meter. We have 1000 of these after conversion.
This essentially indicates that 1000 units of water, each with a volume of one cubic centimeter, would have to combine before we could create a cubic meter of water.
Knowing that one cubic centimeter weighs one gram, 1000 cubic centimeters would weigh 1000 * 1, or 1000g, or one kilogram.
Thus, 1 cubic meters of water will weigh 1 * 1000g = 1000g, or just 1 kg.
Learn more about the Measurement of mass with the help of the given link:
brainly.com/question/13730160
#SPJ4
Answer:
a) 7.2*10^55
b) 1.2*10^29 kg
c) 3.2*10^11 m/s
Explanation:
Given a diameter of 10 km, that's a radius of 5 km.
We first attempt to find its mass number
A = (r/1.2*10^-15)³
A = (5/1.5*10^-15)³
A = 7.2*10^55
This gotten mass number is then multiplied by the mass of each neutron in the star. With each neutron being, 1.7*10^-27
M = 7.5*10^55 * 1.7*10^-27
M = 1.2*10^29 kg
And finally, using the formula
g = GM/r², we can find its acceleration due to gravity.
g = (6.67*10^-11 * 1.2*10^29) / 5000²
g = 8*10^18 / 2.5*10^7
g = 3.2*10^11 m/s
Answer:
590 ohms
Explanation:
Let the resistance of each resistor be 'R'.
Given:
Equivalent resistance of the three resistors in parallel ![(R_p)[/tex[ = 60 ohmWe know that, the equivalent resistance of three identical resistors in parallel is given as:[tex]R_p=\frac{R}{3}](https://tex.z-dn.net/?f=%28R_p%29%5B%2Ftex%5B%20%3D%2060%20ohm%3C%2Fp%3E%3Cp%3EWe%20know%20that%2C%20%3Cstrong%3Ethe%20equivalent%20resistance%20of%20three%20identical%20resistors%20in%20parallel%20is%20given%20as%3A%3C%2Fstrong%3E%3C%2Fp%3E%3Cp%3E%5Btex%5DR_p%3D%5Cfrac%7BR%7D%7B3%7D)
Plug in the given values and solve for 'R'. This gives,
![65=\frac{R}{3}\\\\R=65\times 3\\\\R=195\ ohm](https://tex.z-dn.net/?f=65%3D%5Cfrac%7BR%7D%7B3%7D%5C%5C%5C%5CR%3D65%5Ctimes%203%5C%5C%5C%5CR%3D195%5C%20ohm)
Now, the equivalent resistance of the three identical resistors in series is the sum of each of the resistors. Therefore,
![R_s=R+R+R\\\\R_s=3R\\\\R_s=3\times 195=585\ ohm](https://tex.z-dn.net/?f=R_s%3DR%2BR%2BR%5C%5C%5C%5CR_s%3D3R%5C%5C%5C%5CR_s%3D3%5Ctimes%20195%3D585%5C%20ohm)
As the question asks to round off to two significant figures, so we add 1 to the second significant figure because the number next to 8 is 5 which is greater than or equal to 5. So, the number becomes 590.
Hence, the equivalent resistance in series is 590 ohms.