Answer:
The maximum height reached is 413.27 m.
Explanation:
How long will it take for a body to reach its maximum height, knowing that it was thrown, vertically upwards, with a velocity whose value was 90 m / s?
initial velocity , u = 90 m/s
gravity, g = 9.8 m/s^2
Let the maximum height is h.
At maximum height the velocity v = 0
Use third equation of motion
Answer:
Capillary Action.
Explanation:
Capillary action is the ability of a liquid to flow in narrow spaces without the assistance of, or even in opposition to, external forces like gravity.
it has to me c because it’s a part of the force of things that do
Option (d) is correct. 800 calories of heat is released.
Explanation:
The formula for the heat is given by
Q= m L
Q= heat energy
m= mass =10 g
L= latent heat of fusion=80 cal/gram
so Heat energy= Q= 10 (80)=800 cal
the heat energy is released.
so 800 calories of heat is released.
<span>Disadvantages:
One of the main disadvantages is the initial cost of the equipment used
to harness the suns energy. Solar energy technologies still remain a
costly alternative to the use of readily available fossil fuel
technologies. As the price of solar panels decreases, we are likely to
see an increase in the use of solar cells to generate electricity.
A solar energy installation requires a large area for the system to be
efficient in providing a source of electricity. This may be a
disadvantage in areas where space is short, or expensive (such as inner
cities).
Pollution can be a disadvantage to solar panels, as pollution can
degrade the efficiency of photovoltaic cells. Clouds also provide the
same effect, as they can reduce the energy of the suns rays. This
certain disadvantage is more of an issue with older solar components, as
newer designs integrate technologies to overcome the worst of these
effects.
Solar energy is only useful when the sun is shining. During the night,
your expensive solar equipment will be useless, however the use of solar
battery chargers can help to reduce the effects of this disadvantage.
The location of solar panels can affect performance, due to possible obstructions from the surrounding buildings or landscape.
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