match the term with its definition

v = ir

where v is voltage and i is current

r = v/i

r = 4/0.5

r = 8 ohms

The current through a wire is 0.5 a when the potential difference across is 4.0.v, the resistance of the wire is 8.0 ohms.

Ohm's law, which states that the resistance (R) of a wire is equal to the ratio of the potential difference (V) across the wire to the current (I) flowing through it, can be used to calculate the resistance of a wire.

It has the following mathematical expression:

R = V ÷ I

Here, it is given that:

Potential difference (V) = 4.0 V

Current (I) = 0.5 A

Now we can substitute the values into the formula:

R = 4.0 V ÷ 0.5 A

Calculating the division:

R = 8.0 ohms

Therefore, the resistance of the wire is 8.0 ohms.

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Answer:

this could probably be useful to you

The units of matter in the correct sequence from smallest to largest will be  Protons, atoms, rock particles, bricks, buildings. Option D is correct.

Atom is the smallest unit of matter with chemical element features. As a result, the atom is the fundamental unit of science.

The atom consists of matter that may be split without releasing electrical charges.

In the nucleus, proton and the neutron is existing,the atom is the fundamental part of the particle. Many particle combines to form bricks used in the construction of building.

The units of matter in the correct sequence from smallest to largest will be  Protons, atoms, rock particles, bricks, buildings.

Hence, option D is correct.

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Answer:

The bullet and the rock will hit the ground at exactly the same time

Explanation:

Due to the gravitational forces, defined by Newton's law of gravitation, the acceleration of objects towards the center of the Earth is constant and equal to the acceleration due to gravity, g ≈ 9.8 m/s².

Therefore, given that the initial vertical velocity, u, of the rock and the bullet are both equal to zero, from the following equation of motion, we have;

s = u×t + 1/2·g·t²

t = Time

s = The height from which the bullet is fired and the rock is dropped

s = 0×t + 1/2 × 9.8 × t²

s = 1/2 × 9.8 × t²

t  = √(2 × s/9.8)

Therefore, the time to hit the ground is only dependent on the height from which the bullet and the rock were allowed to fall freely.

Answer:

Newtons third law

Explanation:

every action has an equal but opposite reaction

it exerts the force back on you

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Answer:

The ball will be travelling downward with a speed of 9.8 m/s.

Explanation:

The ball will be travelling downward with a speed of 9.8 m/s.

Explanation:

The acceleration of the ball will be a constant  

9.8 m s 2

(downward), regardless of whether the ball is travelling upward or downward.

The equation that makes this calculation simplest is

v f = v i − g ( Δ t )  

where the negative sign has been used to account for the opposite directions of  v i  and  g . After 3 seconds, v f = 19.6 − ( 9.8 ) ( 3 ) = 19.6 − 29.4 = − 9.8 m s

The negative result tells us that the ball is on its way downward by this time (consistent with our choice of a negative value for the downward acceleration of gravity).

Pollination is the transfer of pollen for plant fertilization

The correct responses are as follows;

The description of the changes that take place is included in this response

6 (i) The circuit arrangement is a parallel circuit arrangement

(ii) The advantages are;

(iii)  Lamp C glows the brightest

(iv) The total resistance is 4 Ω

The reason roe the above responses are as follows:

During the course of pollination, the pollen, through movement, finds it way to the germ-cell in the female ovary, where it fuses with the female egg (gamete) located inside the ovule

The resulting fertilization produces the zygote, which forms an embryo inside the ovule by dividing several times

A seed is formed from the ovule when it develops a tough coat, and by rapid growth a fruit is formed as the ovary matures

5 (i) The kind of combination, where all the wires that enters the bulb are joined on one side of the bulbs, and all the wires that comes from the bulbs are joined on the other end of the bulb, before joining the circuit is a parallel connection

(ii) The advantages of bulbs connected in parallel are;

(iii) The bulb that glows brightest is given by the bulb that consumes the most energy per unit time, and therefore, the bulb that has the most power

Power consumed by each bulb is given as follows;

Bulb A, [tex]P_A[/tex] = 3 A × 60 V = 180 W

Bulb B, [tex]P_B[/tex] = 4 A × 60 V = 240 W

Bulb C, [tex]P_C[/tex] = 5 A × 60 V = 300 W

Bulb D, [tex]P_D[/tex] = 3 A × 60 V = 240 W

The highest power used by a bulb is 300 W, by bulb C

Therefore;

Bulb C is the brightest bulb

(iv) The total resistance of the circuit is given as follows;

[tex]Total \ resistance =\dfrac{Circuit \ voltage}{Total \ current}[/tex]

Total current, [tex]I_{tot}[/tex] = 3 A + 4 A + 5 A + 3 A = 15 A

Circuit voltage, V = 60 V (Given)

Therefore, we have;

[tex]Total \ resistance =\dfrac{60 \, V}{15 \, A} = 4 \, \Omega[/tex]

The total resistance is 4 Ω

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Answer:

12 meters

Explanation:

to find this we look at the 8 on the horizontal line this is 8 seconds, you then look upwards to see the height at that point in time

Answer:

They are both mechanical waves

Answer:

0.10 A

Explanation:

Answer:

the answer is colloids.

Answer:

It is A.

Explanation:

Got it right on Edge 2022.

Rebuilding and retesting a product is part of the fourth stage in the process of technological design, therefore the correct answer is option A.

There are mainly five stages of the technological design

Identifying the issue that needs to be solved is the first step in every problem-solving process.

The second stage is to imagine; during this phase, a designer would generate several concepts and conduct research on potential creations. They must pick a handful of their greatest concepts and then narrow it down to the best.

The chosen product from the imaging stage is planned in the third stage. This process involves designing and drawing the product so that it may be turned into a model or prototype while taking into account the constraints they have to deal with.

Testing, evaluating, and modifying the product are the fourth stage. The designer can determine what they appreciate about their product and what they could change by making a model or prototype of it. Through product testing, this is discovered. If adjustments are required, the designer will repeat the entire procedure until they are satisfied with the final result.

The sharing of your solution is the fifth step. To gather comments, discuss your ideas with others, and enhance your product, you showcase your solution. You might show your answer to a bigger audience in later stages after you've gone through the design process a few times. This is comparable to how World of Inquiry students modifies their homework numerous times before presenting them during the expedition.

Thus, Rebuilding and retesting a product is part of the fourth stage in the process of technological design, therefore the correct answer is option A.

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Answer:

1 Imadge 2 no

Explanation:

Answer: 1: image,     2: no image

Explanation:

Answer:

The runner's acceleration was [tex]1\ m/s^2[/tex]

Explanation:

Constant Acceleration Motion

It's a type of motion in which the velocity of an object changes by an equal amount in every equal period of time.

Being a the constant acceleration, vo the initial speed, vf the final speed, and t the time, the following relation applies:

[tex]v_f=v_o+at[/tex]

Solving for a:

[tex]\displaystyle a=\frac{v_f-v_o}{t}[/tex]

The runner speeds up from vo=5 m/s to vf=9 m/s in t=4 seconds, thus:

[tex]\displaystyle a=\frac{9-5}{4}[/tex]

[tex]\displaystyle a=\frac{4}{4}=1[/tex]

The runner's acceleration was [tex]1\ m/s^2[/tex]

Answer:

receptors

Explanation:

In this case, your skin and brain act as receptors in maintaining homeostasis. These receptors are monitors in different parts of an organism's body that are there to detect specific changes that occur and activate very specific responses in order to counteract these changes and maintain a very stable system. This is exactly, what your skin and brain are doing in this scenario, they detect the change in temperature and counteract its effects through sweat which ultimately causes the opposite effect and maintains equilibrium in your body.

Explanation:

Momentum is mass times velocity.

p = mv

720 kg m/s = m (5 m/s)

m = 144 kg

Answer:

the displacement Is 17m north

Explanation:

15-6=9

9+8=17

The total displacement of a dog that runs 15 meters north, 6 meters south, then 8 meters north would be 17 meters because displacement is measured by the shortest distance between the initial and final position of the moving object.

An object's position changes if it moves in relation to a reference frame, such as when a passenger moves to the back of an airplane or a professor moves to the right in relation to a whiteboard.

Displacement describes this shift in location.

Displacement is a vector quantity.

Since the displacement is determined by the smallest distance between the moving object's original and final positions, a dog traveling 15 meters north, 6 meters south, then 8 meters north would move a total of 17 meters.

Thus, the total displacement of the dog comes out to be  17 meters.

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Explanation:

Substances with their density less than that of water which is 1 g/cm³ will float on it whiles those greater than that of water will sink into the water

From the question the density of the object is greater than that of water so the object will sink into the water

Hope this helps you

Answer:

The rock will sink because it is more dense than water.

Explanation:

Answer:

 w = 4.712 10⁻³ rad / s

Explanation:

For this exercise, the time it takes for the bullet to travel the distance of 2R must be equal to the time that the hole must travel half a circle.

Let's start by calculating the time it takes for the bullet, which is going at constant speed.

         v = x / t

         t = x / v

         t = 2R / v

         t = 2 0.10 / 300

         t = 6.666 10⁻⁴ s

As they ask that a single hole is formed in this time, it must be rotated half a circle, that is, θ =π rad, for which we use the angular scientific relations, where the shell has constant angular velocity

          w = θ / t

          w = π / 6,666 10⁻⁴

          w = 4.712 10⁻³ rad / s

Answer:

Warming up may help reduce muscle soreness and lessen your risk of injury. Cooling down after your workout allows for a gradual recovery of preexercise heart rate and blood pressure.

Explanation:

Answer:

hey

Explanation:

hey

John and Susan find a penny, and Susan says, "I bet you can't tell me what is on the  penny". John's inability to describe the penny is an example of a failure to encode.

The ability to encode a piece of information is to be able to translate or explain the body of information at a later date or time. When John thinks about what is on the penny, he couldn't describe it because he never learned how to encode the information on the piece of the penny in the first place.

Retroactive interference is a process whereby fresh memories interfere with the recovery of old memories. This sort of interference has a retrograde impact rendering it more challenging to recall previously learned information.

On the other hand, proactive interference is a process whereby old memories interfere with the recovery of fresh new memories.

Therefore, we can conclude that since John has never learned what a penny looked like before, he doesn't have previous information about it. As such, the only correct option is (2)

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The moon's gravity  pulls back on the earth. (B)

The two pulls are EQUAL.

Gravity always produces a pair (2) of equal forces in opposite directions.  For example, your weight on the Earth is equal to the Earth's weight on you !

Answer:\

the atomic number of boron (B) is 5.

Atomic number is the number of protons, which is characteristic of a chemical element. Atomic number increases from left to right in Periodic table.

Boron is an element with atomic number 5, which means it has 5 protons and 5 electrons, boron atom has neutral charge.

Electron configuration of boron: ₅B: 1s² 2s² 2p¹, it has three valence electrons in 2s and 2p orbitals.

Explanation:

there you go have a good day

Answer:

A. The car does not land in the river

B. 399.27 meters

Explanation:

The Cliff Height, s: 609.6 m

The velocity at the edge of the cliff, vₓ = 40.3 meters/second  (90 miles per hour)

The location of the Colorado River = 536.5 meters (1,760 feet) from the cliff base

The width of the river across = 300 feet average

The depth of the river = 40 feet

Assumption;

The direction of the vehicle = Horizontal

Vertical velocity of the vehicle = 0 m/s

The time, t, it takes the car to reach the level of the bottom of the cliff is given as follows;

s = [tex]u_y[/tex]·t + 1/2·g·t²

Where;

[tex]u_y[/tex] = The initial vertical velocity of the vehicle = 0

g = The acceleration due to gravity = 9.81 m/s²

Therefore, we have;

609.6 = 0×t + 1/2 × 9.81 × t²

609.6 = 1/2 × 9.81 × t²

t = √(2 × 609.6/9.81) ≈ 11.148 seconds

The horizontal distance, x, travelled by the car in the above calculated, 11.148 seconds, time is x = vₓ × t = 40.3 × 11.148 = 449.27 meters

Therefore, the horizontal distance from the cliff travelled by vehicle on landing from the base of the cliff = 449.27 meters

Given the river is located approximately 536.5 meters from cliff's base, the car does not land in the river

B. In order for the car to land 50 ft. from the edge of the river, the river has to be 449.27 - 50 ≈ 399.27 meters from the base of the cliff.

Answer:

Yes

Explanation:

An atom is made up of itself. Yes this is crazy but true. So far we have found the universe is everlasting, and the universe is part of itself meaning there nothing outside, except heaven and hell

Answer:

To strike or crash into with resounding impact. To collide or strike with great force. Used to indicate the sound of a forceful blow or collision.

Answer:

To strike or crash into with resounding impact. To collide or strike with great force. Used to indicate the sound of a forceful blow or collision.

Explanation:

Answer:

this questions is capable of being answered by submitting law