Answer:
See the answers below
Explanation:
In this problem, we must be clear about the concept of weight. Weight is defined as the product of mass by gravitational acceleration.
We must be clear that the mass is always preserved, that is, the mass of 15 [kg] will always be the same regardless of the planet where they are.
where:
W = weight [N] (units of Newtons)
m = mass = 15 [kg]
g = gravity acceleration [m/s²]
Since we have 9 places with different gravitational acceleration, then we calculate the weight in each of these nine places.
<u>Mercury</u>
<u />![w_{mercury} = 15*3.8\\w_{mercury}= 57 [N]\\](https://tex.z-dn.net/?f=w_%7Bmercury%7D%20%3D%2015%2A3.8%5C%5Cw_%7Bmercury%7D%3D%2057%20%5BN%5D%5C%5C)
<u />
<u>Venus</u>
<u />![w_{venus}=15*8.8\\w_{venus}= 132 [N]](https://tex.z-dn.net/?f=w_%7Bvenus%7D%3D15%2A8.8%5C%5Cw_%7Bvenus%7D%3D%20132%20%5BN%5D)
<u />
<u>Moon</u>
<u />![w_{moon}=15*1.6\\w_{moon}=24[N]](https://tex.z-dn.net/?f=w_%7Bmoon%7D%3D15%2A1.6%5C%5Cw_%7Bmoon%7D%3D24%5BN%5D)
<u />
<u>Mars</u>
![w_{mars}=15*3.7\\w_{mars}=55.5 [N]](https://tex.z-dn.net/?f=w_%7Bmars%7D%3D15%2A3.7%5C%5Cw_%7Bmars%7D%3D55.5%20%5BN%5D)
<u>Jupiter</u>
<u />![w_{jupiter}=15*23.1\\w_{jupiter}= 346.5[N]](https://tex.z-dn.net/?f=w_%7Bjupiter%7D%3D15%2A23.1%5C%5Cw_%7Bjupiter%7D%3D%20346.5%5BN%5D)
<u />
<u>Saturn</u>
<u />![w_{saturn}=15*9\\w_{saturn}=135[N]](https://tex.z-dn.net/?f=w_%7Bsaturn%7D%3D15%2A9%5C%5Cw_%7Bsaturn%7D%3D135%5BN%5D)
<u />
<u>Uranus</u>
<u />![w_{uranus}=15*8.7\\w_{uranus}=130.5[N]](https://tex.z-dn.net/?f=w_%7Buranus%7D%3D15%2A8.7%5C%5Cw_%7Buranus%7D%3D130.5%5BN%5D)
<u />
<u>Neptune</u>
<u />![w_{neptune}=15*11\\w_{neptune}=165[N]](https://tex.z-dn.net/?f=w_%7Bneptune%7D%3D15%2A11%5C%5Cw_%7Bneptune%7D%3D165%5BN%5D)
<u />
<u>Pluto</u>
<u />![w_{pluto}=15*0.6\\w_{pluto}=9[N]](https://tex.z-dn.net/?f=w_%7Bpluto%7D%3D15%2A0.6%5C%5Cw_%7Bpluto%7D%3D9%5BN%5D)
<u />
Answer:
From certain assumptions that the walking speed is 2 m/s, and the stop time is 0.1 s the acceleration would be -20 m/s
Explanation:
Using the average acceleration formula:
where 
and 
are the changes in the speed and time respectively.
We have by assuming that the walking speed is 2 m/s and the stop time is 0.1s which is equal to the change in time during the stopping.
, where 
are the initial speed and final speed respectively, and 
Plugging the previous in the average acceleration formula we get
where the minus sign indicates an acceleration in the opposite direction of the motion (or in other word opposite to the speed's direction).
Answer:
Minimum diameter=1.714
Explanation:
Angular magnification=fob/fey=42
fob=40*fey
Hence minimum diameter=diameter of objective/angular magnification
minimum diameter=72/42=1.714
After a chemical reaction, the atomic nuclei are unchanged. (C)
The nucleii don't know a thing about the outside world during
physical or chemical processes ... not until NUCLEAR things
happen.
Answer:
<em>the mass of one helium nucleus should be</em> <em>less than the mass of four hydrogen nuclei.</em>
Explanation:
Deep inside the core of the Sun, enough protons can collide into each other with enough speed that they stick together to form a helium nucleus and generate a tremendous amount of energy at the same time. This process is called nuclear fusion.
The mass-to-energy conversion is described by Einstein's famous equation:
E = mc2, or, in words, energy equals mass times the square of the velocity of light. Because the velocity of light is a very large number, this equation says that lots of energy can be gained from using up a modest amount of mass.
Photons In the proton-proton chain reaction, hydrogen nuclei are converted to helium nuclei through a number of intermediates. The reactions produce high-energy photons (gamma rays) that move through the "radiative layer" surrounding the core. This layer takes up 60 percent of the radius of the Sun. It takes a million years for energy to get through this layer into the "convective layer", because the photons are constantly intercepted, absorbed and re-emitted. In the core, the helium nuclei make up 62% of the mass (the rest is still hydrogen). The radiative and convective layers have about 72% hydrogen, 26% helium, and 2% heavier elements (by mass). The energy produced by fusion is then transported to the solar surface and emitted as light or ejected as high-energy particles.
