What effect changing voltage and resistance on electric current?

Average velocity

Average velocity = Displacement/ the time interval

Answer:

Average velocity

Explanation:

Hi, the average velocity of an object is equal to the total displacement of an object divided by the total time spent.  

Average velocity = Distance /time  

The units used are distance units per time units (for example: meters per second).  

Is the rate of the change of position of an object.

Feel free to ask for more if needed or if you did not understand something.

Answer:

A coil of wire with an electric current flowing through it becomes a magnet. Putting iron inside a current-carrying coil greatly increases the strength of the electromagnet. Changing magnetic fields induce electric currents in copper and other conductors.

The formula to find accerelation is:

Accerelation= change in velocity÷change in time

the change in velocity here is: 100mph

the change in time is: 5 seconds

a=100÷5 ms

a= 20ms-2

Answer:

8.94m/s²

Explanation:

Acceleration is defined as the change in velocity of an object with respect to time. Mathematically,

Acceleration (a) = change in velocity(∆v)/time (t) where;

Change in velocity(∆v) = final velocity (v) - initial velocity (u)

a = ∆v/t = v-u/t

Given v = 100mph u = 0mph since the vehicle travels from 0mph to 100mph, t = 5seconds

Since 1mph = 0.447m/s

100mph = 44.7m/s

Substituting this values in the formula given we have;

a = 44.7-0/5

a = 8.94m/s²

Its acceleration is 8.94m/s²

A hypothesis is a testable prediction based on observations while a scientific theory is a well-tested, widely accepted explanation of observed phenomena. The process of maturing from a hypothesis to a theory involves thorough testing and validation through the scientific method.

The primary difference between a scientific theory and a hypothesis revolves around their levels of validation. A hypothesis is a testable prediction made based on observations. It is an educated guess that attempts to explain observed phenomena and bridges the gap between the realm of ideas and the real world.

On the other hand, a scientific theory is a widely accepted, well-substantiated explanation of some aspect of the natural world that has been affirmed through repeated testing and observation. Scientific theories are more comprehensive and well-established as they are the result of various tests and experiments that support their validity. While hypotheses are the initial, testable predictions, theories are the matured and validated outcomes of those tests.

It's essential to note that scientific theories can still be modified as new data becomes available through continued research and observation. This adaptability is a crucial part of the scientific method.

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Force = (mass) x (acceleration) ===> Newton #2

Divide each side by (mass), and then it says:

Acceleration = (force) / (mass)

Acceleration = (50,000 N) / (800 kg)

Acceleration (of gravity) = 62.5 m/s²

.

Now, the only question I have is:  WHERE is this coaster ?

The gravity there is almost  6.4 times Earth's gravity.  

It's 2.5 times Jupiter's gravity, and 23% of the gravity ON THE SUN !

If you weigh 125 pounds on Earth, you would weigh 7,813 pounds in THAT place.  You surely couldn't climb into the coaster or sit in a seat, and the coaster surely could not carry you.

Answer:

curved down toward the ground

Explanation:

A projectile movement is a movement composed of a horizontal movement and a vertical movement. According to Galileo, if an object presents a compound movement, each of the component movements is performed as if the others did not exist and in the same interval of time. This is the principle of simultaneity.

When an object is cast horizontally, it describes a parabolic movement in relation to the Earth. Accordingly, we can conclude that an object in projectile motion will follow a curved path to the ground.

Answer:

B: curved down toward the ground

Explanation:

on edge2021! hope this helps!!~ ~ヾ(＾∇＾)

A workman has a cup containing a hot drink as part of his meal. In order to keep the drink hot whilst he eats the rest of his meal, he covers the cup, because of the evaporation from the surface of the liquid.

Evaporation occurs in the liquid when the surface of the liquid is open to the surrounding environment. When evaporation occurs, the liquid releases the vapors into the surrounding, which leads to liquid cooling faster than liquid kept in a closed container.

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Answer:

Raising its temperature by [tex]1^{\circ}C[/tex]

Explanation:

The specific heat capacity of a substance is defined as the amount of energy needed to raise the temperature of 1 kg of a substance by [tex]1^{\circ}C[/tex].

The specific heat capacity of a substance essentially tells us how much energy is needed to heat the substance: the larger it is, the more energy is needed. The amount of energy needed to increase the temperature of a substance is given by

[tex]Q=mC_s \DeltaT[/tex]

where

m is the mass of the substance

Cs is the specific heat capacity

[tex]\Delta T[/tex] is the temperature variation of the substance

Answer:

Raising its temperature by 1 C

Explanation:

A P E X

I don’t know undertansdsje

Answer:

The correct answer is 13 m/s.

Momentum is found by multiplying the mass of the object by the velocity.

1200 x 30 = 36,000 Newtons

2000 x 20 = 40,000 Newtons.

The 2,000kg truck has greater momentum.

The pitch of a sound you hear depends on the frequency of the sound wave. A high frequency sound wave has a high pitch, and a low frequency sound wave has a low pitch.

A high pitch sound corresponds to a high frequency sound wave and a low pitch sound corresponds to a low frequency sound wave.

The correct answer is total revenue minus total cost.

When a firm is calculating the profit they need to find the difference between how much money they earned and how much they spent. The difference between their total revenue and their total cost is their profit.

Answer:

The correct option is 3. A firm calculate its profit as " Total profit = Total revenue - Total cost".

Explanation:

Profit of a firm is financial gain. It is the difference between the total amount earned by the firm and the total amount spent in buying, operating, or producing something.

It other words, profit is the difference between total revenue and total cost.

A firm calculate its profit as

Total profit = Total revenue - Total cost

Where, total revenue is the sum of fixed and marginal revenue, total cost is the sum of fixed cost and marginal cost.

A firm calculate its profit as " Total profit = Total revenue - Total cost". Therefore the correct option is 3.

The answer would be c if u need to know

Answer:

When the incident ray passes through the focal point

Explanation:

A concave mirror has an inward curved surface that reflects the light making it converge at a focal point. It is characterized by the fact that, unlike convex mirrors, concave mirrors show images of different shapes depending on the distance between the object and the mirror.

When the object is at the same focal point, the reflected rays are parallel and never cross, so no image is formed, or in other words, it is reflected parallel to the main axis.

Final answer:

To find the repulsive force between two charged balloons, we employ Coulomb's Law, applying given values into the formula to calculate the force based on the charges' magnitudes and separation distance.

Explanation:

The question involves calculating the magnitude of the electrical force of repulsion between two balloons charged with an identical quantity and type of charge (-4 nC), and separated by a distance of 70 cm. To find this, we use Coulomb's Law, which states that the force between two charges is directly proportional to the product of the magnitudes of the charges and inversely proportional to the square of the distance between them

The formula for Coulomb's Law is given by F = k × (q1 × q2) / r², where F is the force between the charges, k is Coulomb's constant (8.987 ×510¹ N m² C²), q1 and q2 are the magnitudes of the charges, and r is the distance between the charges. Inserting the given values (-4 nC for each charge and 0.7 meters for r):

F = (8.987 × 10¹) × ((-4 × 10⁻⁹) × (-4 × 10⁻⁹)) / (0.7)²

Calculation results in the repulsive force magnitude, which is what the question is seeking. It's important to remember that since the charges are identical in magnitude and type, the force calculated will be repulsive.

Answer:

200 W

Explanation:

The power is given by the ratio between the amount of work done and the time taken to perform the work:

[tex]P=\frac{W}{t}[/tex]

where in this problem we have

W = 2600 J is the work done

t = 13 s is the time taken to do the work

Substituting the numbers into the equation, we find

[tex]P=\frac{2600 J}{13 s}=200 W[/tex]

Answer:

200 W

Explanation:

To figure out the power, you need to use the formula: P = work/time. You need to remember that they may ask you for the significant figures, so that is how many digits you have to round by. This question does not specify significant figures.

2600/ 13 =  200

Your answer is 200 watts

Option A: The pendulum swings with a constant velocity.

The pendulum is swinging back to center at position 2 m and time 8 sec.

D. Gravity anomalies.

Out of all choices, Gravity anomalies provide evidence that crust is thin under the mid ocean ridge.

Answer: Option D

Explanation:

Gravity promotes subduction zones. We can perform geological processes with the help of geological processes, because the process in which the oceanic crust moves to the mantle as soon as it collides with the continental crust.

Subduction destroys the ocean's crust, pushing it into the mantle in which it melts. It is said that the ocean's crust is weak because it contains more mafic minerals and is approaching its borders again. If there is a difference between the continental crust, the oceanic crust sank into the mantle.

3.53 cm

Mechanical advantage = Input distance/output distance

Input distance = 3.0 cm

Mechanical advantage = 0.85

Output distance = Input distance/Mechanical advantage

                           =  3.0/0.85

                           = 3.53 cm

DASH is an acronym for Dietary Approaches to Stop Hypertension.

It stands for Dietary Approaches to Stop Hypertension.  Hope I was able to help you. :)

when the tray is placed in the oven,the particles get heated their temperature increases hence their kinetic energy therefore the particles vibrate morer vigorously. When the tray is removed from the oven,it's temperature decreases, kinetic energy of the particles decreases hence they vibrate slowly.

It travels faster in air than in water.

hope this helps :)

Plasma's are a lot like gases, but the atoms are different, because they are made up of free electrons and ions of an element such as neon. Plasma is different from a gas, because it is made up of groups of positively and negatively charged particles. In neon gas, the electrons are all bound to the nucleus.

Hope this helps:)

An is formed when an atom loses or gains one or more electrons. Because the number of electrons in an ion is different from the number of protons, an ion does have an overall electric charge. Consider how a positive ion can form from an atom. The left side of the illustration below represents a sodium (Na) atom

It is a negative ion

The kinetic energy of the neutron is calculated by using the formula for kinetic energy, KE = 1/2mv^2 with mass 1.7x10^-27 kg and speed 3.33x10^4 m/s. The resulting kinetic energy is 1.88x10^-19 Joules.

To calculate the kinetic energy of a neutron we can use the formula for kinetic energy: KE = 1/2mv^2 where 'm' is mass and 'v' is velocity. We first need to calculate the velocity of the neutron, which we can get by dividing distance (12m) by time (3.6x10^-4 sec). The resulting speed is 3.33x10^4 m/s.Explanation:

Next we use the given mass of the neutron 1.7x10^-27 kg, the speed we've calculated, and the kinetic energy equation. After substitution into the formula we get: KE = 1/2 * (1.7x10^-27 kg) * (3.33 x 10^4 m/s)^2 yielding KE = 1.88x10^-19 Joules.

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You just said that the object is "floating".  

(As soon as you said that, a picture of a duck flashed through my mind.  But then I knew right away that the duck could not be an accurate representation of the situation you're describing.  340 N would be some duck ... about 76 pounds ... and that duck would have been caught and eaten a long time ago. I mean ... what could a 76-pound duck do ?  Could it fly away ?  Could it run away ? ?  Not likely.)

So it's not a duck, but whatever it is, it's just sitting there on the water, floating.  What's important is that it's not accelerating up or down.  THAT tells us that the vertical forces on it are balanced so that there's NO NET vertical force on it at all.

What are the vertical forces on it ?  There's gravity, pulling it DOWN with a force of 340 N, and there's buoyancy, pushing it UP.  The SUM of those two forces must be zero ... otherwise the object would be accelerating up or down.

It's not.  So (gravity) + (buoyancy) must add up to zero.

The buoyant force on the object is 340 N UPward.

The explanation accepted by science until now, indicates that Earth's magnetic field is generated in the deepest of the terrestrial nucleus.

This is due to the movements of liquid metals in the core of the planet.

To explain it in more detail:

Right in the center of the Earth there is an internal core of solid iron at a very high temperature, this iron is as hot as the surface of the Sun, however, the pressure caused by the gravity force prevents it from becoming liquid. Around this inner core is the outer core, a layer of approximately 2000 km thick, composed of iron, nickel and small amounts of other metals in liquid state. Due to the lower pressure of the outer core, in relation to the inner core, the metal here is fluid (molten).

The differences in temperature, pressure and composition within the outer core cause convection currents in the molten metal, as the cold, dense matter sinks, and the warm, less dense matter rises. In addition, the Coriolis force, resulting from the spin of the Earth, also causes eddies in this mixture of molten metals.

This is how the movement of liquid iron inside the Earth generates electric currents, which in turn produce magnetic fields, and the spiral caused by the Coriolis force causes the magnetic fields to align in approximately the same direction, being this combined effect added to produce a vast magnetic field that envelops the entire planet.

This field extends from the terrestrial nucleus, progressively attenuating itself in outer space. However, it should be noted that unlike the field of a bar magnet, the Earth's magnetic field changes over time because it is actually generated by the movement of the iron alloys in the Earth's outer core, which causes the poles to move.

Answer: D

Explanation: the guy above gave a good explanation and is right

A) 1 (one)

i think it is C. Complex, although i haven't learned this so long.

A four-resistor circuit that has three parallel resistors is considered to be a type of circuit in parallel. The correct option is B.

When resistors are connected in parallel, they have the same voltage across them but different currents flowing through them.

4 cars = 16 students

? cars = 36 students

let x be the number of cars for 36 students

4 • 36 = 16 • x

144 = 16x

144/16 = x

9 = x

It requires 9 cars for 36 students.

//Hope it helps

To transport 36 students, when 4 cars are required for 16 students, we use a proportion to calculate that nine cars are needed.

To determine the number of cars needed to transport 36 students, we can set up a proportion based on the information that four cars are required for 16 students. This is a straightforward arithmetic problem involving ratios. We use the following proportion:

16 students / 4 cars = 36 students / x cars

Solving for x gives us the equation:

16/4 = 36/x

After cross-multiplying, we have:

16x = 36 * 4

16x = 144

To find x, divide both sides by 16:

x = 144 / 16

x = 9

Therefore, nine cars are needed to transport 36 students.

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-it can only be converted from one form to another.

The phrase "by ordinary means" was added to the Law of Conservation of Energy because kind to be expected in the normal order of events.

The phrase "by ordinary means" was added The phrase "by ordinary means" was added.

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