A pedestrian moves 6.00 km east and then 13.0 km north. Find the magnitude and direction of the resultant?
Answers
Direction east of north = tan⁻¹ (6/13) = 24.8° east of north
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5.00 N
1440 N
1490 N
Answers
A nurse applies a horizontal force of 147 N on a bed that has a mass of 152 kg. The magnitude of the normal force acting on the bed is 1490 N.
What is force?
A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.
The force applied by the nurse is horizontal, so there's no vertical component.
Therefore, the normal force is simply equal to the weight of the bed.
N = mg
N = (152 kg) (9.8 m/s²)
N = 1490 N
A nurse applies a horizontal force of 147 N on a bed that has a mass of 152 kg. The magnitude of the normal force acting on the bed is 1490 N.
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Answer:
1490 N
Explanation:
The force applied by the nurse is horizontal, so there's no vertical component.
Therefore, the normal force is simply equal to the weight of the bed.
N = mg
N = (152 kg) (9.8 m/s²)
N = 1490 N
b. The dark lines are at higher energies than the bright lines.
c. The bright lines are at higher energies than the dark lines.
d. You cannot relate the two types of spectra.
Answers
Wouldn't it be neat if an electron falling closer to the nucleus ... emitting a
photon ... actually gave out more energy than it needed to climb to its original
energy level by absorbing a photon ! If there were some miraculous substance
that could do that, we'd have it made.
All we'd need is a pile of it in our basement, with a bright light bulb over the pile,
connected to a tiny hand-crank generator.
Whenever we wanted some energy, like for cooking or heating the house, we'd
switch the light bulb on, point it towards the pile, and give the little generator a
little shove. It wouldn't take much to git 'er going.
The atoms in the pile would absorb some photons, raising their electrons to higher
energy levels. Then the electrons would fall back down to lower energy levels,
releasing more energy than they needed to climb up. We could take that energy,
use some of it to keep the light bulb shining on the pile, and use the extra to heat
the house or run the dishwasher.
The energy an electron absorbs when it climbs to a higher energy level (forming
the atom's absorption spectrum) is precisely identical to the energy it emits when
it falls back to its original level (creating the atom's emission spectrum).
Energy that wasn't either there in the atom to begin with or else pumped
into it from somewhere can't be created there.
You get what you pay for, or, as my grandfather used to say, "For nothing
you get nothing."
Final answer:
The dark absorption lines of an atom's spectrum correspond to the same energies as the bright emission lines. They both reflect energy changes in electron states.
Explanation:
The dark lines of an atom's absorption spectrum are at the same energies as the bright lines of its emission spectrum, therefore the correct answer is a. The bright lines are at the same energies as the dark lines. Absorption spectra are produced when electrons absorb energy and move to a higher energy level, while emission spectra are observed when electrons lose energy and return to a lower energy level.
The dark lines (absorption) and bright lines (emission) coincide because the energy required to move an electron from a lower to higher energy level matches the energy released when an electron drops from a higher to lower state.
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Answers
I just got %100 on my quiz, the answer is d(wind flow and temperature
Answers
Answer:
The magnitude of the electrostatic force decreases by a factor 9
Explanation:
The electrostatic force between two charges is given by:
where
k is the Coulomb's constant
q1 and q2 are the two charges
d is the distance between the two charges
We see that the magnitude of the force is inversely proportional to the square of the distance. If the distance is increased to 3d: d' = 3d, the new electrostatic force would be:
So, the electrostatic force decreases by a factor 9.
Answers
Final answer:
An upward fold in rock is not a plateau, but is termed an anticline. They form when two continental masses collide, causing the Earth's crust to fold and buckle, forming many of the world's mountain ranges.
Explanation:
False, an upward fold in a rock is not called a plateau but is termed as an anticline. The formation of this kind of structure occurs when two continental masses are in a collision course moving towards each other. They push against each other under great pressure causing the Earth's crust to buckle and fold. Some rock gets dragged deep below the surface while other folds are elevated to heights of many kilometres. This upward fold or anticline, is how many mountain ranges on Earth were formed, such as the Alps which resulted from the African plate bumping into the Eurasian plate.
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Answers
Final answer:
Disposable gloves are designed for single use and should be discarded after each task to prevent cross-contamination or reduced effectiveness from damage. They should not be reused.
Explanation:
In general, disposable gloves are designed to be used once and then thrown away. They should be removed and discarded after handling a task, then a new pair of gloves should be worn for a different task. This is because reusing disposable gloves can lead to cross-contamination or the gloves becoming less effective if they become damaged from continuous use. For instance, if a person wears the same gloves while treating a patient and then handling medical equipment, bacteria and other harmful substances can spread, creating a risk to health. Therefore, it is crucial to practice accurate and responsible use of disposable gloves in healthcare settings and other scenarios where gloves are required for safety and hygiene purposes.
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