What are two ways in which the suns energy can be captured and used?
Answers
The oldest way ... the way we've been using as long as we've been
walking on the Earth ... has been to use plants. Plants sit out in the
sun all day, capturing its energy and using it to make chemical compounds.
Then we come along, cut the plants down, and eat them. Our bodies
rip the chemical compounds apart and suck the solar energy out of them,
and then we use the energy to walk around, sing, and play video games.
Another way to capture the sun's energy is to build a dam across a creek
or a river, so that the water can't flow past it. You see, it was the sun's
energy that evaporated the water from the ocean and lifted it high into
the sky, giving it a lot of potential energy. The rain falls on high ground,
up in the mountains, so the water still has most of that potential energy
as it drizzles down the river to the ocean. If we catch it on its way, we
can use some of that potential energy to turn wheels, grind our grain,
turn our hydroelectric turbines to get electrical energy ... all kinds of jobs.
A modern, recent new way to capture some of the sun's energy is to use
photovoltaic cells. Those are the flat blue things that you see on roofs
everywhere. When the sun shines on them, they convert some of its
energy into electrical energy. We use some of what they produce, and
we store the rest in giant batteries, to use when the sun is not there.
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________________________ from the wind transfers to the water as the water moves toward land.A. EnergyB. MoistureC. Vibrations
What is a sentence for allele
A student notices that an inflated balloon gets larger when it is warmed by a lamp. Which best describes the mass of the balloon as a result of this change?A. The mass of the balloon increases because the size of the balloon has increased. B. The mass of the balloon increases because the temperature of the balloon has increased. C. The mass of the balloon stays the same because the gas inside the balloon still has same mass after it warms up.D. The mass of the balloon stays the same because warming decreases the mass enough to cancel out the effect of increasing the size. Please explain why you chose your answer
Answers
if you increase either mass or velocity the momentum of an object increases proportionally if you double the mass or velocity you double the momentum.
Mass and velocity are both directly proportional to the momentum. If you increase either mass or velocity, the momentum of the object increases proportionally. If you double the mass or velocity you double the momentum.
The momentum is given by:
P=mv
Where P is momentum.
m is mass and v is velocity.
Therefore, the momentum is increased either by increasing mass or velocity.
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2. A light ball has more inertia than a heavy ball
3. The less momentum a bowling ball has, the easier it is for that ball to knock down pins.
4. A heavy bowling ball is easy to get rolling because of its inertia.
Answers
Final answer:
A baseball has more momentum than a tennis ball traveling at the same speed. A light ball has less inertia than a heavy ball. The less momentum a bowling ball has, the easier it is for that ball to knock down pins. A heavy bowling ball is easy to get rolling because of its inertia.
Explanation:
1. True. Momentum is the product of an object's mass and velocity. Since a baseball has more mass than a tennis ball while traveling at the same speed, it has more momentum.
2. False. Inertia is the resistance of an object to changes in its motion. It depends on an object's mass. So, a heavy ball has more inertia than a light ball.
3. False. The more momentum a bowling ball has, the easier it is for it to knock down pins. Momentum is directly proportional to the force at which the ball hits the pins.
4. True. Inertia is the tendency of an object to resist changes in its motion. A heavy bowling ball has more inertia, making it easier to get rolling.
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b. radiation that is absorbed by the sun
c. radiation that comes from the earth
d. radiation that is absorbed by the earth
Answers
A:put an atom on a poster in the exhibit C:Display a large three dimensional -
model of an atom.
B:use a life size drawing of an atom d:set up a microscope so that visitors-
can view atoms
Answers
A: put an atom on a poster in the exhibit
Good luck. The poster itself is made of trillions of trillions of trillions
of atoms. You could not see the extra one any easier than you could
see the ones that are already there, and even if you could, it would be
lost in the crowd.
B: use a life size drawing of an atom
Good luck. Nobody has ever seen an atom. Atoms are too small
to see. That's a big part of the reason that nobody knew they exist
until less than 200 years ago.
D: set up a microscope so that visitors can view atoms
Good luck. Atoms are way too small to see with a microscope.
C: Display a large three dimensional model of an atom.
Finally ! A suggestion that makes sense.
If something is too big or too small to see, show a model of it
that's just the right size to see.
Answers
Answer:
The magnitude of Adams' force is 88 N
Explanation:
According to Newton's law ∑ forces in direction of motion is equal to
mass multiplied by the acceleration
There are two forces here the friction force and Adams' force
Adams' force is in direction of motion
Friction force is opposite to direction of motion
→ Friction force = μ R,
where μ is the coefficient of friction and R is the normal reaction force
of the boat
→ R = mg
where m is the mass of the boat and g is the acceleration of gravity
→ m = 47 kg , g = 9.8 m/s²
→ R = mg
Substitute the values in the rule
→ R = 47 × 9.8 = 460.6 N
→ Friction force = μ R
→ μ = 0.13 , R = 460.0 N
Substitute the values in the rule
→ Friction force = 0.13 × 460.0 = 59.878 N
→ ∑ Forces in direction of motion = mass × acceleration
→ F - Friction force = mass × acceleration
→ Friction force = 59.878 N , m = 47 kg , a = 0.6 m/s²
Substitute the values in the rule
→ F - 59.878 = 47 × 0.6
→ F - 59.878 = 28.2
Add 59.878 to both sides
→ F = 88.078 N ≅ 88 N
The magnitude of Adams' force is 88 N
Answers
Answer: 71.72 days
Explanation:
This problem can be solved using the Radioactive Half Life Formula:
(1)
Where:
is the final amount of Iodine-131
is the initial amount of Iodine-131
is the time elapsed
is the half life of Iodine-131
Knowing this, let's substitute the values and find from (1):
(2)
(3)
Applying natural logarithm in both sides:
(4)
(5)
Finding :