Measuring the amount of deuterium in the universe allows us to set a limit on _________.
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Answer:
the density of ordinary (baryonic) matter in the universe
Explanation:
Deuterium detection is of interest because the amount of it may be related to the amount of dark matter in the universe, but precise measurements have been difficult to obtain. Due to the way in which deuterium was created in the Big Bang, an exact measurement of the amount of deuterium would allow scientists to set limits on the models of the great explosion.
Also, an exact measure of deuterium would be an indicator of the cosmic density of barions (ordinary matter), and that density of barions would indicate whether ordinary matter is dark and is found in regions such as black holes, gas clouds or brown dwarfs, or it is bright and can be found in the stars. This information will help scientists who try to understand the very beginning of our universe.
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Money is useful to people because it is __________.Select one of the options below as your answer:a. a medium of exchangeb. prestigiousc. nice to look atd. something that makes you feel good
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I hope my answer helped you somehow. Have a nice day!
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Answer: 140 m
Explanation:
Let's begin by stating clear that motiont is the change of position of a body at a certain time. So, during this motion, the balloon will have a trajectory and a displacement, being both different:
The trajectory is the path followed by the body, the distance it travelled (is a scalar quantity).
The displacement is the distance in a straight line between the initial and final position (is a vector quantity).
So, according to this, the distance the balloon traveled during the first 45 s (its trajectory) is 140 m.
But, if we talk about displacement, we have to draw a straight line between the initial position of the balloon (point 0) to its final position (point 90 m). Being its displacement 95 m.
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Final answer:
Electrical energy is useful for powering electronic devices and transportation systems, while light energy allows us to see and supports important processes like photosynthesis.
Explanation:
Electrical energy and light energy are useful in various ways in our daily lives.
Electrical energy:
- Powering electronic devices such as computers, smartphones, and kitchen appliances.
- Providing lighting in homes, offices, and streets.
- Running transportation systems like electric cars, trains, and subways.
Light energy:
- Allowing us to see our surroundings and providing vision.
- Supporting the process of photosynthesis in plants, which is vital for the production of our food and oxygen.
- Used in various medical applications such as X-rays, ultraviolet therapy, and laser surgeries.
Learn more about Usefulness of Electrical Energy and Light Energy here:
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a=F/m=300/25=12 m/s^2
B. 0.41 Seconds
C. 0.71 Seconds
D. 1.01 Seconds
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Answer:
c. 0.71 [s]
Explanation:
To solve this problem we must use the following equation of kinematics.
where:
Vf = final velocity = 0 (because when the ball reaches the top, there is no movement)
Vo = initial velocity = 7 [m/s]
g = gravity acceleration = 9.81 [m/s²]
t = time [s]
Note: The negative sign of the equation means that the movement is againts the direction of the gravity acceleration.
b) between 1 kW and 10 kW
c) more than 10 kW
Please show calculations!
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The potential energy of each kg of water, before it falls, is
(M G H) = (1kg) (9.8 m/s²) x (30 m) = 294 joules
The potential energy lost by 60 kg of water pouring through is
(60 x 294) = 17,640 joules
The power output of the plant is
(17,640 joules/sec) x (85%) = 14,994 watts
= almost but not quite 15 kW.
(If you used 10 for gravity, it would come out to 15.3 kW)