Scientists can use rock layers to determine which of the following? Group of answer choices The mass of Earth The size of Earth The age of Earth The amount of land on Earth
Answer:
The age of the earth
Explanation:
The deeper the layer the older the age
You have a nightlight plugged into an outlet in the hallway, which uses 3.5 watts when plugged in. If the house circuit provides 120.0 volts, wh
is the current through this bulb?
A. 420 amps
B.
0.029 amps
C.
34 amps
D.
0.0083 amps
Answer:
I = 0.029 A
Explanation:
It is given that,
Power of hallway is 3.5 watts
The house circuit provides 120 volts
We need to find the current through this bulb. The power of electric bulb is given by :
[tex]P=VI[/tex]
[tex]I=\dfrac{P}{V}\\\\I=\dfrac{3.5}{120}\\\\I=0.029\ A[/tex]
So, the electric current is 0.029 A.
Answer:
I = 0.029 A
Explanation:
Mirrors produce images by doing which of the following to light?
A. Refraction
B. Diffraction
C. Reflection
D. Interference
E. Scattering
Answer: C
Reflection
Explanation: Light travels in a straight line. Reflection is one of the properties of light. And this is the property in which mirror make use of. The ability of light to bounce back. It's this bouncing back characteristics of light ray that eventually produce the image of an object by the mirror.
If the light ray is absorbed, no image will be produced.
does a atom power a star
Answer: yes
Explanation: All atoms larger than hydrogen and helium have been made within the thermonuclear furnace of a star, powered by nuclear fusion. This is the process in which smaller atoms, i.e., hydrogen and helium, are smashed together to form larger elements, such as carbon.
When waves meet, and form either a larger or smaller amplitude, it is called _______
a. absorption
b. reflection
c. inference
d. refraction
Answer:
Explanation:
Reflexión
a baseball player throws 4 balls every 20 seconds. what is his throw frequency
Answer:
Frequency, f = 0.2 Hz
Explanation:
We have,
A baseball player throws 4 balls every 20 seconds.
It is required to find the frequency of the baseball.
Frequency of an object is defined as the number of times an event occurs. It is given by number of throws per unit time. It can be given by :
[tex]f=\dfrac{4}{20}\\\\f=0.2\ Hz[/tex]
So, the frequency of his throw is 0.2 Hz.
Which energy conversion correctly describes what happens when you are dancing
Adding a best-fit line to the scatter plot shown below would be an example of _____.
A. making an inference
B. drawing a conclusion
C. checking a prediction
D. correcting a hypothesis
ANSWER THIS ASAP
Question 2-3
Scientists have discovered fossils of ancient
whalelike animals that had legs instead of
flippers. This evidence most likely indicates
that the ancestors of present-day whales
A lived in the ocean.
B lived on land.
C evolved gradually rather than during
short periods of rapid change.
D never became extinct.
A bird sitting on a hinged perch takes off from the perch, pushing the perch
in the opposite direction. The momentum of the perch
Answer:
The momentum of the perch is equal to it's own momentum gather to take off
Explanation:
According to the Newton third law of motion which state that: in every action, there will be an equal and opposite reaction.
This is the law that helps us to walk, paddle boats e.t.c.
And momentum is always conserved. Therefore, the momentum of the perch is equal to it's own momentum gather to take off
people are more likely to treat someone kindly if they've you that person's bad behavior as the result of an external attribution
true or false
Answer:
True
Explanation:
Answer:
True
Explanation:
When waves traveling in the same medium meet, a new
wave may be produced. Use the slider to create the resulting
wave with the largest amplitude.
Answer:
if there is any phase between the waves this value is less
if the sine function is ±, the amplitude of the total wave is
A_total = A₁ + A₂ + A₃+ A₄ +A₅
Explanation:
When several waves travel in the same direction, the process of adding them can take place.
y_total = ∑ [tex]y_{i}[/tex]
where
y_{i} = A_{i} sin (k x - w t + Ф)
with fi the phase of each wave
To produce the largest possible result, all waves must come with the same phase
y_total = (A₁ + A₂ + A₃ + A₄ + A₅) sin (k x - wt)
if there is any phase between the waves this value is less
if the sine function is ±, the amplitude of the total wave is
A_total = A₁ + A₂ + A₃+ A₄ +A₅
Answer:
Explanation:
Just got it right
please help me and i’ll give you brainliest if correct :)
Answer:
Accurate Measurements
Explanation:
Always put in accurate measurements when arguing
Answer:
accurately measurements
3. If substance A has half the index of refraction of substance B, which is (most likely) more dense
Answer:
The correct answer is A!
Explanation:
If a car is traveling at the speed of light and the car turns on the headlight, what would happen? Would the headlight not turn on at all, would the headlight travel at twice the speed of light, or would the headlight act like a flowing sink flowing out light?
Answer:
flowing sink flowing out light
Explanation:
Along with X-Rays, which high frequency EM waves can be used to destroy
cancer cells? *
Radio
Microwave
Infrared
Gamma
Which term describes the bending of a wave as it travels into a different
medium?
A. Reflection
B. Interference
C. Diffraction
D. Refraction
Answer:
Refraction
Explanation:
Answer:
a
Explanation:
a charged particle is 2×10^-4C determine the quantum number of the charge
Answer:
wedf
Explanation:
Which best explains why making a pancake from batter is an example of a chemical change?
The pancake that forms is a different state of matter.
The change from batter to pancake can be reversed.
A new substance forms when the batter is cooked.
The batter changes shape when it is cooked.
Answer:
first one
Explanation:
Two speakers create identical 240 Hz sound waves. A person is 1.47 m from Speaker 1. What is the MINIMUM distance to Speaker 2 for there to be destructive interference at that spot? (Hint: v= lambda f=343 m/s) (Unit = m)
Answer: 2.90 metres
Explanation:
Distance of speaker 2 =?
Distance of speaker 1 = 1.47m
Velocity = 343
f = 240Hz
For constructive interference to occur:
Difference in distance or path = wavelength
For minimum distance, n = 1
Distance 2 - distance 1 = nλ
Recall λ = v/f
V = Velocity ; f = frequency
Distance 2 - distance 1 = v/f
Distance 2 - 1.47 = (343/240)
Distance 2 = 1.429 + 1.47
Distance 2 = 2.899 meters
Minimum Distance of speaker 2 for their to be constructive interference = 2.90meters
Answer:
The answer would be 0.755415
ANSWER ASAP!! EASY!!
just fill in the blanks
Answer:
the first one is stay in motion and stay at rest
the second one is unbalanced and accelerate
i can't see the third one but i think it is equal because it may say Newton's third law states that...
Explanation:
Answer:
1. Stay in motion
2. Stay at rest
3. Unbalanced
4. Accelerate
Explanation:
Fill in the Blanks in this order and you will get it correct
Which statement is true about the ideal mechanical advantage of a third-class lever?
A It is always greater than 1.
B It is always equal to 1.
C It is always less than 1.
D It can be less than, greater than or equal to 1.
Answer:
It is always less than one.
Explanation:
Because the load covers more distance than the force when they move in the same direction.
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What happens to the liquid propane when it hits the warmer air?
Answer:after -44 degrees it turns into liquid and when it becomes vapor when it gets warmer
Explanation:
What are physical properties?
Answer:
they are things that can't be turned back the way they were before, like when you mix an egg, you can't get the egg to unmix itself.
Explanation:
6. To which of these abrasive disks can you
apply a water-coolant?
(A) Concrete
(B) Metal
Answer: its B
Explanation:
Metal abrasive disks are used as a water coolant. These are used mostly to slice stones and metals. Grit discs have several advantages over various kinds of discs. They have such a relatively fast cutting speed. The grit disc sander is not a hefty instrument that can be easily held when operating on a scaffold.
Steel cutting fluids are abrasive or peening mediums composed of iron particles. They are typically offered in two sizes (shot and grit) that suit various industrial applications. Since these grains are made from smashed steel shot, they have sharp edges and broken parts.Therefore, the answer is "Option B".
Learn more:
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What is the mass of a car that hits a deer with a force of 3,000 N if it started traveling at a speed of 50 m/s but slowed down to 25 m/s in 5 s before hitting the deer?
Answer:
Can’t u just google it?
Explanation:
Which describes how chemical changes are different from physical changes?
Select one: a. Chemical changes can be measured, but physical changes cannot. b. Chemical changes involve the formation of a new substance. c. Chemical changes release energy, but physical changes absorb energy. d. Chemical changes cannot be caused by oxygen.
Answer:
B. Chemical changes involve the formation of a new substance.
Explanation:
They can both release energy, both can be measured, and chemical changes can be caused by oxygen, so I believe it would be B.
The diagram shows the schematic symbol of a transistor.
Which is the correct label for the part of the transistor
marked with an X?
Х
base
outlet
gate controller
electrical supply
Answer:
base
Explanation:
In the schematic symbol of a transistor, the arrow in the symbol indicates the direction of flow. There are three terminals namely, emitter, collector and base.
When you apply 0.7V from base to emitter you will turn the transistor ON and allow a current to flow from collector to emitter.
With the x in the picture the base must be indicated because all other answers do not make sense.
The correct label for the part of the transistor marked with an X is base.
What is transistor?A transistor is a semiconductor device used to amplify the electrical signals and power. The transistor is one of the important part of modern electronics. It is consist of semiconductor material, have three terminals for connection.
In the place of mark X of a transistor, the arrow in the symbol indicates the direction of flow. There are three terminals called as emitter, collector and base.
The base is indicated by the mark X in the picture.
Learn more about transistor.
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what is the gain in GPE when a brick of 2.00 kg is lofted up by 11.5 m?
Answer:
225.63 j
Explanation:
GPE = MGH
M= 2.00 KG
H= 11.5 m
g = 9.81 m/s2
gpe = ?
2x11.5x9.81 = 225.63