Answer:
change in temperature
Explanation:
just like a rock, if it is put in different temperatures, the different substance you get.
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PLEASE HELP ASAP URGENT!!!!!
Which statement is true of AC current?
A.
It uses a battery as a power source.
B.
It can easily be transformed from high voltages to low voltages.
C.
It is typically low voltage.
D.
the electrons are moving in one direction
E.
It was the first type of electric current invented.
Answer:
B
i am not fully sure but i believe its the most accurate its either A or B
Answer:
b
Explanation:
plato
Which model below correctly represents an object with a correct pair of magnetic domains?
Answer: The term magnetism comes from the region of Magnesia, a city in Western Turkey, where Greeks found lodestones, which attracted iron pieces across the space. It is also observed that, magnets attract as well as repel. We can explain this dual nature of magnetic force by proposing that each magnet has two poles, north pole (N) and south pole (S). You will observe two things during the activities:
1) When two magnets are brought near each other, like poles repel; opposite poles attract.
2) When a magnet is brought near a piece of iron, the iron also gets attracted to the magnet, and it acquires the same ability to attract other pieces of iron.
hope this helps u stay safe
Select the correct answer.
Which situation may cause delayed rigor mortis?
A.
The victim was found in the summer during a heat wave.
B.
The victim died a violent death.
C.
The victim was sleeping at the time of death.
OD. The victim died of cancer.
Reset
Next
Answer: the answer is C
Explanation:
39. Three 12 a resistors are connected in parallel and then connected to a 6.0 V battery. Find
the resulting current. Show your work. This is a two part question.
40. The devices and outlets in each circuit in a household are wired in parallel. The main
reason for this is
a. Plugging in more devices increases the total resistance on the circuit
b. Plugging in more devices decreases the total resistance on the circuit.
c. Unplugging a device does not affect the other devices on the circuit.
d. Connecting the devices in parallel is safer than if they were in series.
Answer:
39.) Current = 1.5 A
40.) B
Explanation:
Given that three 12 Ohms resistors are connected in parallel.
The equivalent resistance R will be
1/R = 1/R1 + 1/R2 + 1/R3
Substitute the values into the formula
1/R = 1/12 + 1/12 + 1/12
1/R = 3/12
Find the reciprocal of both sides
R = 12/3
R = 4 Ohms
From Ohm's law,
V = IR
Where V = 6v
Substitute V and the R into the formula and make current I the subject of formula
6 = I × 4
I = 6/4
I = 1.5 A
Therefore, the resulting current is 1.5 Ampere.
40.) If the devices and outlets in each circuit in a household are wired in parallel, The main reason for this is
Plugging in more devices decreases the total resistance on the circuit.
Because, the sum of resistance of resistors in parallel is less than the least resistance of a resistor is the circuit. Also, they will all share the same amount of voltage because there is no voltage drop.
If a 15 kg mass accelerates at a rate of 4 m/s2, what net force acts on it?
A 15 N
B 4N
C 3.75 N
D 60 N
E.267 N
Explanation:
Mass(M)=15 kg
Acceleration(A)=4 m/s2
Force=?
Now,
Force(F)=M×A
F=15×4
F=60N Ans
A batter hits a fly ball into the outfield. The
force is responsible for the ball falling to the ground.
What is the unit for current
Answer:
ampere is the unit of current
Hey!!!
Here's your answer:
The unit of current is Ampere.
Additional Information:
SI (Sestéme International d' Unite's) is defined as the system of units which is agreed by the International Convention of Scientists held in France in 1960.
Si units of some quantities are as follows :
Length = MetreMass=kilogramTime=secondTemperature=KelvinElectric current=AmpereLuminous intensity= CandelaAmount of substance=MoleArea=square metreVolume=Cubic metreVelocity=metre per secondAcceleration=metre per square secondForce=NewtonDensity=Kilogram per cubic metrePressure=PascalMomentum=Kilogram metre per secondWork and Energy=JoulePower=WattFrequency=HertzPotential difference=VoltResistance=ohmHope it helps.....
Good luck on your assignment
Fill in the blanks to complete each statement about weathering. Weathering is the breakdown of rocks into smaller particles called-------------- . ------------------ weathering is when rocks are physically broken into smaller pieces, but the minerals in the rock remain the same. When a rock is broken down in a way that changes the mineral composition, it is called----------------- weathering.
Answer:
sedimentary rocks and sedimentary
i am not 100% sure that this is the correct answer but it is an educated guess
Answer:
Sediment
Mechanical
Chemical
Explanation:
which has a greater mechanical advantage. a doorknob or screwdriver?
Answer:
screwdriver should be the awnser is what I think
Which of the following statements is good advice to prevent becoming overly emotional?
A.
There is no way to prevent becoming overly emotional.
B.
You should hang around with people that make you angry as often as possible so that you get used to having to control your emotions.
C.
Get enough sleep every night.
D.
Eating unhealthy, good tasting food will make you happy so that you don
Answer:
c
Explanation:
Try to remember that sleep deprivation or the lack of sleep, messes with the amygdala in the brain - this is the part of the brain that controls some of our emotions. If you mess with the amygdala then it messes with you - it will cause you to be more fight than flight - it can make you hypersensitive to stuff that you normally could use your coping skills to conquer!
Answer:
c
Explanation:
Scientific knowledge
A.
was modified regularly early in human history, but it can no longer be modified.
B.
must be modified by popular vote from the general public.
C.
cannot be modified, even if new information challenges prevailing theories.
D.
can be modified as new information challenges prevailing theories.
Answer:
D
Explanation:
As we progress and learn more, scientists make new discoveries that can contradict earlier discoveries, and since are technology is better today we are able to discover a lot more to add to or change our previous theories.
Answer:
The answer is D. i got this off of study island
Explanation:
Hope this helps!
What 2 things do you need to make sound? help ASAP
Answer:
- A vibrating object
- a medium to travel
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Derive the third equation of motion v2=u2+2as
[tex]let \: us \: assume \: a \: body \: moving \: with \: \\ an \: initial \: velocity \: u \: . \: let \: its \: final \\ velocity \: be \: v \: after \: a \: time \: t \: and \: the \\ distance \: travelled \: by \: the \: body \: be \: s . \\ we \: already \: have \\ v = u + at.......(i) \\ s = \frac{u + v}{2} \times t..........(ii) \\ putting \: the \: value \: of \: t \: from \: (i) \: in \\ the \: equation \: (ii) \\ (v = u + at \\ or \: at = v - u \\ or \: t = \frac{v - u}{a} \\ now\\ s = \frac{u + v}{2} \times \frac{v - u}{a} \\ or \: s = \frac{ {v}^{2} - {u}^{2} }{2a} \\ or \: 2as = {v}^{2} - {u}^{2} \\ {v}^{2} = {u}^{2} + 2as \\ hope \: it \: helps \\ good \: luck \: on \: your \: assignment[/tex]
11. What's the best example of a source
of direct current?
A. A magnesium oxide paste
OB. A zinc shell battery
C. An electrolyte
D. A dry cell battery
Answer:
D. A dry cell battery
Explanation:
A dry cell is a type of electric battery, commonly used for portable electrical devices. It was developed in 1886 by the German scientist Carl Gassner, after development of wet zinc-carbon batteries by Georges Leclanché in 1866.
Answer:
A dry cell battery
Explanation:
If you add a small amount of hydrochloric acid to 4 liters of water, you would create a _____ solution.
A.) concentrated
B.) weak
C.) dilute
D.) basic
Answer:
The answer is D.
Explanation:
An example of a weak base is ammonia. It does not contain hydroxide ions, but it reacts with water to produce ammonium ions and hydroxide ions. The position of equilibrium varies from base to base when a weak base reacts with water. The further to the left it is, the weaker the base.
Answer:
The correct answer is C.) dilute
What is the resultant acceleration?
A. The scalar that joins all the points along the path
B. The resultant displacement divided by time
C. The sum of all the acceleration vectors
D. The average of all the acceleration vectors
Answer: C.
The sum of all the acceleration vectors
Explanation: The word resultant means the sum of two or more vectors.
Since acceleration is a vector quantity,
The resultant acceleration will be the sum of all the acceleration vectors. Where there are two or more acceleration to be considered on an object in a system.
If you apply a net force of 5N on a cart with a mass of 5 kg, show that the acceleration is 1 m/s2.
(SHOW WORK)
Answer: F = 5kg x 1 m/s2 = 5 N
Explanation:
Hi, to answer this question we have to apply the next formula:
Force (F) = mass x acceleration
Replacing with the values given and solving for F (force)
F = 5kg x 1 m/s2 = 5 kgm/s2
Since 1 Newton (N) = 1 kgm/s2
F = 5N
Feel free to ask for more if needed or if you did not understand something.
Pedro is planning to model how changes in weather affect evaporation from
lakes. For his first experiment, he wants to test how humidity affects the
evaporation rate. He places one beaker with 300 mL of water in a dry area,
and he places another beaker with 300 mL of water near a humidifier.
What is the dependent variable in Pedro's experiment?
A. Evaporation rate
B. Temperature
c. Humidity
D. Volume of water
Answer:
Evaporation rate is the dependent variable in Pedro's experiment
Explanation:
it is the variable that is being measured and is expected to change in response to changes in humidity. The independent variable is humidity, which is being manipulated by placing one beaker near a humidifier and the other in a dry area. Temperature and volume of water are not being directly manipulated in this experiment and are therefore not the dependent variable.
Place the descriptions in the correct categories.
rift valleys
At Convergent Boundaries
At Divergent Boundaries
plates pulling apart
magma breaks through crust
subduction
volcanic mountains
island arc
magma flows from cracks
mid-ocean ridges
Answer:
At Convergent Boundaries:
Subduction
Island arcs
Volcanic mountains
At Divergent Boundaries:
Mid-ocean ridges
Rift valleys
Plates pulling apart
Magma breaks through crust
Magma flows from cracks
Explanation:
A convergent plate boundary is a location where two tectonic plates are moving toward each other, often causing one plate to slide below the other (in a process known as subduction). The collision of tectonic plates can result in earthquakes, volcanoes, the formation of mountains, and other geological events.
A divergent boundary occurs when two tectonic plates move away from each other. Along these boundaries, earthquakes are common and magma (molten rock) rises from the Earth's mantle to the surface, solidifying to create new oceanic crust.
Divergent boundaries occur in the rifts of the oceanic ridge system, including the Mid-Atlantic Ridge and the East Pacific Rise, and in the continental lithosphere by rift valleys such as the famous East African Great Rift Valley.
Answer:
At Convergent Boundaries
subduction
island arc
volcanic mountains
magma breaks through crust
At Divergent Boundaries
mid-ocean ridges
rift valleys
plates pulling apart
magma flows from cracks
Explanation:
A bald eagle moving with constant acceleration increases its speed from 5,000m / s to 12.00m / s over a distance of 200.0m. How long does it take you to do this?
a)4.849s
b)23.53s
c)28.95s
d)11.76s
Answer:
dont know answer
Explanation:
plss ask from any one
What is the time period of vibration?
Answer:
A time period is denoted by 'T' . It is the time to complete one cycle of vibration. As the frequency of a wave increases, the time period of the wave decreases. The unit for time period is 'seconds
HOPE IT HELPS :)
PLEASE MARK IT THE BRAINLIEST!
Hypothesis:
Part A
If we split a laser beam by using a diffraction grating slide, then we can
verify the _____________ by applying the formula λ = ds/l.
2) Part B If we split light into its individual wavelengths using a diffraction grating,
then we can determine the _____________ by multiplying the spacing of the
gradient lines (d) times the distance to the central maxima of the color band (s)
divided by the length distance from the grating slide to the screen (l).
Answer:
1.) Wavelength
2.) Number of fringes
Explanation:
1.) If we split a laser beam by using a diffraction grating slide, then we can
verify the wavelength by applying the formula λ = ds/l.
2) If we split light into its individual wavelengths using a diffraction grating,
then we can determine the number of fringes by multiplying the spacing of the gradient lines (d) times the distance to the central maxima of the color band (s) divided by the length distance from the grating slide to the screen (l).
What happens to the resistance of a wire as its length increases? A. The resistance decreases. B. The resistance is not affected by a change in wire length. C. The resistance alternates between high and low values. D. The resistance increases.
Answer:
D. The resistance increases.
Explanation:
Resistance of a wire is R = ρL/A, where ρ is the resistivity of the wire, L is the length, and A is the cross sectional area.
As L increases, R increases.
A pet hamster runs across the floor at 5.6 m/s for 3.9 s toward the door. How far
does he get?
Answer:
Travelled 21.84m
Explanation:
5.6 metres a second, 3.9 seconds.
5.6×3.9=21.84
A 41 turn rectangular coil of dimensions 5.00 cm ✕ 10.0 cm is allowed to fall from a position where B = 0 to a new position where B = 0.520 T and the magnetic field is directed perpendicular to the plane of the coil. Calculate the magnitude of the average emf that is induced in the coil if the displacement occurs in 0.330 s.
Explanation:
We have,
Number of turns in a coil is 41
Dimensions of a rectangular coil is 5 cm by 10 cm
Initial magnetic field is 0 and new field is 0.52 T. The magnetic field is directed perpendicular to the plane of the coil.
It is required to find the magnitude of the average emf that is induced in the coil if the displacement occurs in 0.330 s. According to Faraday's law,
[tex]E=\dfrac{-d\phi}{dt}[/tex]
[tex]\phi[/tex] = magnetic flux
[tex]E=\dfrac{-d(NBA)}{dt}\\\\E=NA\dfrac{-(B_f-B_i)}{dt}\\\\E=41\times 0.005\times \dfrac{(0.52)}{0.33}\\E=0.32\ V[/tex]
So, the magnitude of induced emf is 0.32 V.
Which of the following phases changes at point B on the diagram shown below?
A)deposition
B)freezing
C)melting
D)boiling
Answer:
C. melting
option C is correct answer.
Electrical Force is possible because of
Answer:
Electrical forces result from mutual interactions between two charges. ... The direction of each of these three forces can be determined by applying the basic rules of charge interaction: oppositely charged objects attract and like-charged objects repel
Explanation:
Please answer as soon as possible.
A Physics question about electricity and circuits.
Answer:
Explanation:
Electrical energy is:
E = IVt
E = 210 * 12 * 10\\\\\\E = 25200 J
Some very hot stars appear bluish when viewed by a telescope. This is because they _____ more blue light than stars like the Sun. A. emit B. reflect C. absorb D. transmit
Answer:
A. they emit more blue light than stars like the Sun
Why does the winds move? What makes it move,?
Explanation:
The wind is caused by differences in the atmospheric pressure. When a difference in atmospheric pressure exists, air moves from the higher to the lower pressure area, resulting in winds of various speeds. On a rotating planet, air will also be deflected by the Coriolis effect, except exactly on the equator.
HOPE THIS HELP YOU !!! :)))The wind is caused by differences in the atmospheric pressure. When a difference in atmospheric pressure exists, air moves from the higher to the lower pressure area, resulting in winds of various speeds. On a rotating planet, air will also be deflected by the Coriolis effect, except exactly on the equator.
Why does the wind move?
he wind blows because of differences in air pressure. ... Instead, the wind blows anti-clockwise around the low pressure area in the Northern Hemisphere and clockwise in the Southern Hemisphere. This is the effect of the earth's rotation, which produces a force, called Coriolis, that deflects the wind from its path.
Why does air move to one place or another?
Air moves because the sun generates heat on the earth, this causes hot air, hot air rises creating wind, the air which is made up of 02 C02 and many other gases is carried by wind. air moves from place to place due to the different temperature and pressure conditions on the earth