Hello kiddio!
Most of the mass<span> of atom is in a dense positively charged </span>nucleus<span>. Most of the volume of an atom is in an empty space in which negatively charged electrons move around the </span>nucleus<span>.
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Have a nice day
Answer:
13.7m
Explanation:
Since there's no external force acting on the astronaut or the satellite, the momentum must be conserved before and after the push. Since both are at rest before, momentum is 0.
After the push
Where 
is the mass of the astronaut, 
is the mass of the satellite, 
is the speed of the satellite. We can calculate the speed 
of the astronaut:
So the astronaut has a opposite direction with the satellite motion, which is further away from the shuttle. Since it takes 7.5 s for the astronaut to make contact with the shuttle, the distance would be
d = vt = 1.83 * 7.5 = 13.7 m
Answer:
what is the question in "2. A race car rounding a corner at a constant speed of 200 miles per hour. Yes not"
Answer:
Homeostasis is the body or cells ability to seek and maintain equilibrium or stability in response to external changes.
Explanation:
Homeostasis is a process through which a cell or entire body of an organism tends to attain it's original state by countering any external environmental change to which it is exposed. In simple words we can define homeostasis as a regulatory mechanism which helps a cell/organism to maintain constant internal environment.
For example during summer season when external environment gets extremely hot and temperature rises up to 45-48 °C in such condition our body's internal temperature which is normally 37 °C gets affected and tends to rise so as to attain equilibrium with the external environment. But if the internal temperature will rise more than optimum temperature i.e. 37 °C then our body's machinery will cease to work and it will die out if temperature will keep on rising. In such scenario to avoid temperature rise our body will use homeostasis mechanism to counter the change. In order to do so we have sweat glands. Our sweat glands will start secreting sweat as a result of which the external heat rather than raising our body's temperature will be used to evaporate water present in the sweat and we will be able to protect our body from harmful external environment.
Answer:
When fuels burn in combustion reactions, they release useful thermal energy (heat). Combustion reactions are used to heat our homes, power most cars, and to generate a lot of our electricity.
Energy production from the reaction is what drives life and human greed. We stay alive by eating carbon-rich compounds, which are then burned in a spectacularly controlled and efficient manner to provide us with energy. It is the all-important energy term in the combustion equation that has made life on Earth possible
