Compounds are substances in which two or more atoms are chemically combined to form a new,
pure substance. Which of the following substances is NOT a compound
If you can please help with both if you can

Answer:potential difference is more or less like voltage. Using ohms, V=IR

Where V is Voltage

I is Current =0.4A

R is Resistance=20ohms

V=0.4*20

V=8V

Hence the potential difference will be 8V.

ii) V=0.4*30

V=12V

Explanation:

The voltage of potential difference is directly proportional to the current and the resistance. So if one increase or decrease, it will have impact on the other.

From the calculations, when the resistance increase, the voltage will increase to appreciate the change.

Answer:

weight.................

Answer:

The surface closest to the balloon becomes positively charged, while the far side of the can becomes negatively charged. This results in an attractive force that draws the can to the balloon.

Explanation:

Answer:

The balloon is negatively charged.

Explanation:

hope it helps

Answer: The area of the rectangle is 72.12 square meters

Explanation:

The area of the rectangle is  length x width  

Area = 6.01 m x 12 m = 72.12 m²

Answer:

answer is B.72

Explanation:

Answer: v=1,56(m/s)

Explanation: Called: g(Gravity acceleration) =10\(m/s^{2} \\\)(or 9,8\(m/s^{2}\))

                                 h=1,2m  ;   t=1,3s

Because the coin fell freely, the velocity is calculated by the formula:

v=\(\sqrt{2gh}\)  (1)

besides, you have time to touch the bottom of the water is 1,3s:

t=\(\sqrt\frac{2g}{h} }\) (2)

(1) and (2) => v=1,56 (m/s)

Due to the constructive superposition of two waves traveling in opposite directions, we get the amplitude of the standing wave much bigger than the amplitude of oscillation.

A wave is a disturbance in a medium that consists of power without a net motion of debris. it could take the shape of elastic deformation, a variant of pressure, electric or magnetic intensity, electric-powered ability, or temperature.

wave, propagation of disturbances from vicinity to region in an ordinary and prepared manner. most acquainted are floor waves that tour on the water, however sound, light, and the motion of subatomic particles all show off wavelike properties. A wave is a non-stop and repeating disturbance of a medium and a pulse is an unmarried disturbance.

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Answer:

18

Explanation:

12 - 5 + 8 = 15

12 - 8 = 4

7 - 4 = 3

15 + 3 = 18

The table for the mass of the bicyclist and kinetic energy, and Chloe's speed and kinetic energy, gives the attached graphs of kinetic energy and mass and Chloe's kinetic energy and her speed.

The relationship shown on the graph of the kinetic energy to mass shows that at constant velocity, v, the kinetic energy is directly proportional to the mass.

The relationship shown in the graph of Chloe's kinetic energy to velocity indicates that the kinetic energy varies quadratically with the velocity as the graph is shaped like half of a parabola like the graph of a quadratic equation

Please find attached the graph of the kinetic energy versus mass for the bikers, showing the mass of each biker using a combination graph of a line graph and a column chart.

Please find the graph of Chloe's kinetic energy versus her speed created from the given table using a spreadsheet application

The relationship shown in each graph are as follows;

K.E. = 0.5•m•v²

Therefore, at constant velocity, v, kinetic energy is directly proportional to the mass, and as the mass increases, the kinetic energy increases proportionately

The graph of kinetic energy to mass therefore increases from left to right as mass increases forming the approximately straight red line.

Second graph (kinetic energy to mass)

The relationship between kinetic energy and Chloe's velocity, can be expressed mathematically as follows, given that her mass is constant

K.E. = 0.5•m•v²

K.E. = (0.5•m)•v²

The quantity, (0.5•m), c is a constant, therefore;

K.E. = c•v²

Given that the minimum velocity, v, of Chloe in the given direction can be taken as 0, the graph of kinetic energy to velocity increases quadratically (in the form of half of a parabola) from left to right as the velocity increases.

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The amount of electrical energy expended raising the temperature of 45 liters of water by 75°C with 90% efficiency is 16,100 J.

The amount of energy required to raise the temperature of 45 liters of water by 75°C can be calculated as follows:

First, we need to calculate the heat required to raise the temperature of the water. The heat required can be calculated using the formula:

Q = mcΔT

where Q is the heat, m is the mass of the water (in kilograms), c is the specific heat capacity of water (4.184 J/g°C), and ΔT is the change in temperature (75°C).

Since 1 liter of water weighs 1000 grams, the mass of 45 liters of water is 45 x 1000 = 45,000 grams or 45 kilograms. So,

Q = 45 x 4.184 x 75 = 14,490 J

Next, we need to take into account the efficiency of the heating equipment. If the efficiency is 90%, then only 90% of the energy input is used to heat the water, and the rest is lost as heat to the environment. So, the energy required to heat the water is:

E = Q / 0.9 = 14,490 / 0.9 = 16,100 J

Therefore, the amount of electrical energy expended raising the temperature of 45 liters of water by 75°C with 90% efficiency is 16,100 J.

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Answer:

d. N*m

Explanation:

Workdone which is measured in Joules is calculated using the formula;

Workdone = force * distance

Where;

Force is measured in Newton

Distance is measured in meters.

Therefore, workdone also has the measurement of Newton-meters.

The first dark fringe is located approximately 7.35 mm from the central maximum on the screen.

The location of the first dark fringe can be found using the formula:

y = (mλD) / d

where y is the distance from the central maximum to the first dark fringe, m is the order of the fringe (m = 1 for the first dark fringe), λ is the wavelength of light, D is the distance from the double-slit to the screen, and d is the slit spacing (which is the sum of the slit width and the distance between the centers of the two slits).

The slit width is given as 0.15 mm = 0.00015 m, and the wavelength of light is 450 nm = 0.00045 m. The distance from the double-slit to the screen is 2.3 m.

To find the slit spacing, we need to know the distance between the centers of the two slits. If the double-slit is a single piece with two slits, the distance between the centers of the slits is usually given as the width of the slits plus the distance between them. If this information is not provided, we can assume that the distance between the centers of the slits is approximately equal to the width of each slit. Therefore, we can estimate the slit spacing as:

d ≈ 2 × 0.00015 m = 0.0003 m

Substituting the values into the formula, we get:

\(y = (1 × 0.00045 m × 2.3 m) / 0.0003 m\)

y ≈ 7.35 m

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Answer:

Eukarya

Explanation:

Only organisms of domain eukarya have an organized nucleus

Fuse, breakers, and other overcurrent protection devices set an appropriate current limit and sever short circuits.

The size of the overcurrent protection system depends on the overcurrent protection system type and the maximum current that can travel through the circuit components. National codes specify the size and design of the overcurrent protection system. The size of the overcurrent protection devices is typically determined by the array's short-circuit current.

The PV is a limited current source, meaning that the short-circuit current is the highest current produced by this source, which is the major justification for choosing the array's short-circuit current.

The distribution lines of electric grids integrated with DER are safeguarded by an overcurrent protection system. The phase overcurrent protection and the ground overcurrent protection are two further classifications for this protection strategy. Depending on the distribution method, the relays employed in such schemes could be either directional (functioning for in-front events) or nondirectional (working for all). Radial distribution systems are where nondirectional relays are most frequently employed.

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Answer:

False

Explanation:

201.46 MJ of heat flows through the brick wall in an 11.6 hour period.

To find how much heat flows through the wall, we need to use the formula: Q = kA(delta T)/t, where Q is the heat flow, k is the thermal conductivity, A is the area of the wall, delta T is the temperature difference, and t is the time period.

We can calculate the area of the wall as 4m x 6m = 24 square meters and convert the thickness to meters (0.22m).

The temperature difference is (22-8) = 14 degrees Celsius.

Plugging in the values, we get Q = (0.63 W/m*K)(24 \(m^2\))(14 K)/(11.6 h)(3600 s/h) = 201.46 MJ.

Therefore, 201.46 MJ of heat flows through the brick wall in an 11.6 hour period.

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A battery rating given in ampere-hours measures the total amount of charge the battery can deliver over time.

A battery rating given in ampere-hours (Ah) quantifies the total amount of charge a battery can deliver over a specific period of time. It represents the product of the battery's current (in amperes) and the duration of discharge (in hours) until the battery is depleted.

For example, a 5 Ah battery can supply a current of 1 ampere for 5 hours or 0.5 amperes for 10 hours before it is fully discharged. Ampere-hours provide a measure of a battery's capacity or energy storage capability.

This rating is commonly used for rechargeable batteries in various applications, such as automotive batteries, portable electronics, and renewable energy systems, allowing users to estimate the battery's performance and plan their usage accordingly.

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Answer:

Time in air t = 1.38 second (Approx)

Explanation:

Given:

Initial speed u = 0 m/s

Final speed v = 13.5 m/s

Find:

Time in air t

Computation:

v = u + gt

g = 9.8 m/s²

13.5 = 0 + (9.8)(t)

13.5 = 9.8 t

t = 13.5 / 9.8

t = 1.3777 second

Time in air t = 1.38 second (Approx)

The kinetic energy of the square mass in terms of angular velocity is expressed as KE = (1/2)mr²ω²

The kinetic energy of the square mass in terms of angular velocity, you'll need to use the formula for kinetic energy and relate it to angular velocity.

Recall the formula for kinetic energy (KE) of a moving object:
KE = (1/2)mv², where m is the mass and v is the linear velocity.

Relate linear velocity (v) to angular velocity (ω) using the formula:
v = ωr, where ω is the angular velocity and r is the distance from the center of rotation to the mass.

Substitute the expression for linear velocity (v) in terms of angular velocity (ω) into the kinetic energy formula:
KE = (1/2)m(ωr)²

Simplify the expression:
KE = (1/2)mr²ω²

So The kinetic energy of the square mass in terms of angular velocity is expressed as KE = (1/2)mr²ω², where m is the mass, r is the distance from the center of rotation, and ω is the angular velocity.

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The velocity of the ball in m/s if the angular velocity of the ball about the elbow joint is 28.5 rad/s and the ball is 1.25 m from the elbow joint is 35.6 m/s.

The velocity of the ball can be calculated  in the following way:

We know that the angular velocity of the ball about the elbow joint is 28.5 rad/s and the ball is 1.25 m from the elbow joint.

The formula for the velocity of the ball is given as:

Velocity = (angular velocity) x (radius)

The radius of the ball is 1.25 m.

Substituting the values of angular velocity and radius in the above formula, we get:

Velocity = 28.5 rad/s x 1.25 m= 35.6 m/s.

Therefore, the velocity of the ball is 35.6 m/s.

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An excellent green, eco-friendly substitute is coconut coir, a byproduct of coconuts. Due to its ability to clean without endangering the ecosystem, coir is becoming increasingly popular and adopted.

The shell of the coconut is known as coco coir. It is immersed in water for a few weeks after extraction to help it loosen and soften. The husk is then dried, brushed, and turned into a product that resembles fibre but is much stronger. Because of the product's durability, stretching or compressing it in any way won't harm it.
Fine brushes, ropes, beds, upholstery, and fishnets are all made from white coco coir, which is extracted from unripe coconuts.

Brown coco coir is pressed from ripe coconuts and used to create mats, pots, and scrubbers that resemble discs for cleaning kitchen surfaces and utensils. In the kitchen, these naturally antimicrobial items are preferable to plastic scrubbers. When they begin, they can be recycled as an organic planting substrate because they are not toxic.

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The mass remains the same, the weight on the Moon is also 22.24 N.

To determine the weight of the bag of sugar on the Moon, we need to apply Newton's second law of motion, which states that weight is equal to the mass of an object multiplied by the acceleration due to gravity.

On Earth, the weight is given as 5.00 lb. To convert this to newtons, we need to multiply by the conversion factor of 4.448 N/lb.

Weight on Earth = 5.00 lb * 4.448 N/lb = 22.24 N

On the Moon, where the free-fall acceleration is one-sixth that on Earth, the acceleration due to gravity is 1/6 * 9.8 \(m/s^{2}\) = 1.63 \(m/s^{2}\).

Using Newton's second law, we can find the weight on the Moon:

Weight on the Moon = mass * acceleration due to gravity on the Moon = mass * 1.63 \(m/s^{2}\).

Since the mass remains the same, the weight on the Moon is also 22.24 N.

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An optical device is an instrument that uses light for a purpose. The device that can focus light to a point through reflection is mirror.

The reflection is the phenomenon of a light ray going back to the same medium after striking a surface.

The mirror is a one sided polished surface which reflects all the light falling on it. The reflected light after striking the mirror meets at a point forming the image of an object place in front of mirror. A mirror is an optical device that uses reflection phenomenon to focus light.

Thus, the device that can focus light to a point through reflection is mirror.

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Answer:

Kinda? Depends what the question is fully asking

Explanation:

Acceleration is a change in velocity. So I guess if the velocity of something is -2 m/s and its positively accelerating at a value of +1 m/s, then that means every second its velocity changes by +1m/s.

So that -2 m/s thing after one second will be going -1 m/s.

After another second it'll be going 0 m/s.

After another itll be going +1 m/s and so on.

So at one point for a brief moment, it can have an acceleration but be at 0 m/s velocity.

The maximum distance a wave varies from its rest position is called the amplitude of the wave.

The amplitude represents the maximum displacement or distance from equilibrium that a particle or medium experiences as the wave passes through it.In a transverse wave, such as a wave on a string or an electromagnetic wave, the amplitude is measured as the maximum displacement of the particles in the medium perpendicular to the direction of wave propagation. For example, in an ocean wave, the amplitude would be the maximum height of the wave crest above the average water level.

In a longitudinal wave, such as a sound wave, the amplitude is measured as the maximum displacement of particles in the medium parallel to the direction of wave propagation. For example, in a sound wave, the amplitude would be the maximum compression or rarefaction of air particles from their equilibrium position.

The amplitude of a wave determines its energy and intensity. Higher amplitudes generally correspond to waves with greater energy and intensity. Amplitude also affects the perception of the wave, such as the volume of a sound wave or the brightness of a light wave.

It's important to note that the amplitude is a measure of the wave's displacement and should not be confused with wavelength, which is the distance between two corresponding points on the wave (e.g., crest to crest or compression to compression).

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Answer:

Note that the number of atoms of each element is the same on each side of the reaction: four iron atoms and six oxygen atoms.

Explanation:

Answer:

10, 4 iron and 6 O

Explanation:

Given data:

* the displacement of the box in the horizontal direction is 5 m.

* The force applied on the box at an angle of 45 degree is 20 N.

Solution:

The representation of the given system is,

The work done by the force during the displacement is,

Substituting the known values,

Thus, the work done on the box by the force F during the given displacement is 70.71 J.

The only hazard usually associated with most air mass thunderstorms is lightning. The right option is d).

Air mass thunderstorms, also known as common thunderstorms, are weather events that develop when a warm, moist air mass rises into a cooler air mass. The uplifting of the air happens when the warm air mass is lighter than the surrounding cold air.

The rising warm air eventually cools and condenses into cumulus clouds, which grow in height as more moisture is added to the rising air. After that, as the air reaches the top of the troposphere, it becomes heavy enough to begin falling back to the earth's surface as precipitation. This falling air can bring gusty winds and lightning strikes with it.

The correct answer is d) lightning.

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Answer:

Hey there!

He starts from km 257.

Then he travels to km 133.

Finally, he travels to km 173.

His displacement is 257-173, or 84 km.

He traveled 164 km. (Note that distance traveled and displacement are not the same thing.)

Let me know if this helps :)

John's resultant displacement from the 257 km märker would be 84 kilometers .

He traveled a distance of 164 kilometers on the highway.

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.

As given in the problem, Johın is traveling along a straight inter-state highway, he notices that the mile marker reads 257 km. John travels until he reaches the 133 km marker and then retraces his path to the 173 km marker.

The total displacement of the John = 257 - 173

                                                     = 84 kilometers

the total distance traveled by John = (257-133) + (173-133)

                                                          = 164 kilometes

Thus, John's resultant displacement from the 257 km märker would be 84 kilometers.

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