If there is acceleration there must be a {{c1::net force}}

Answer:

b. 220 V

Explanation:

Let resistors be R1, R2, and R3 respectively.

Given the following data;

R1 = 20 ohms

R2 = 30 ohms

R3 = 60 ohms

Current = 2 Amperes

To find the voltage;

First of all, we would determine the total effective resistance (RT).

For series circuit;

RT = R1 + R2 + R3

RT = 20 + 30 + 60

RT = 110 Ohms

Next, we find the voltage using the formula;

Voltage = current * resistance

Voltage = 2 * 110

Voltage = 220 Volts

The answer for Eating food from a uranium glass plate is safer is Choice C which is food is irradiated / not contaminated.

It is safer to eat food from a uranium glass plate because the uranium added to the glass will always be in the oxidized form used to color it. The uranium added to the glass will also be not soluble thus it will not be radioactive.

Thus, the reason for eating food safely from the uranium glass plate is it will not be contaminated

The other two options(alpha cannot penetrate skin or body and contains a low percentage of uranium) will be wrong because the plate will be completely non-radioactive.

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Answer:

As a form of energy, heat has the unit joule (J). The standard unit for the rate of heat transferred is the watt (W), defined as one joule per second.

heat is a form of energy therefore the unit of heat is the same as that of energy has the CGS unit of heat is erg and its SI unit is Joule

relationship between Joule and erg is --

\(10 J = 10⁷ erg\)

other unit of heat are calories kilocolries

\(relationship \: between \: calorie \: and \: joule

1 calorie = 4 .18 \: j(or \: nearly \: 4.2 \: j \: ) \\ \\ 1 \: kilocalorie \: = 4.18 \: \times 10 \: cube \: j\)

666.6667 N force did he apply.

When two or more items interact, it creates a push or pull between them and is known as a force. Whenever a force is present, it always has a direction. The drag caused by a surface's interaction with air and the force caused by friction between two objects is two examples of opposing forces. The impulse is described as the result of time and force.

Impulse (I) equals F * t.

As the impulse is given to us, which is:

I equal 100 ns, and t is 0.15 s.

So, the necessary force is:

F = I/t

F = 100/0.15

F = 666.6667 N

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The  speed when it hits the ground is option (B) 15.5 m/s.

To determine the speed of the object when it hits the ground, we can use the principle of conservation of energy. The initial potential energy of the object is converted into kinetic energy as it falls.

The change in gravitational potential energy is given as ΔPE = mgh, where m is the mass of the object, g is the acceleration due to gravity, and h is the height.

We know that ΔPE = 565 J, and the height h = 12.0 m.

Since the object is initially at rest, its initial kinetic energy is zero.

The total mechanical energy (sum of potential and kinetic energy) is conserved, so:

ΔPE = ΔKE

mgh = (1/2)mv^2

Here, m cancels out, giving:

gh = (1/2)v^2

Substituting the known values:

(9.8 m/s^2)(12.0 m) = (1/2)v^2

117.6 = (1/2)v^2

Dividing both sides by (1/2):

235.2 = v^2

Taking the square root of both sides:

v ≈ 15.33 m/s

Therefore, the speed of the object when it hits the ground is approximately 15.33 m/s.

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Answer:

Explanation:

m = 1500 kg

u = 15 m/s

v  = 25 m/s

s = 100 m

\(v^{2} = u^{2} + 2as\)

\(25^{2} = 15^{2} + 2a\) × 100

625 = 225 + 200 a

-200a = 225 - 625

-200a = -400

a = 400 / 200

a = 2 m/s

f = ma

f = 1500 × 2

= 3000 N

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The length of the skid marks an automobile leaves behind can be used by the authorities to estimate the speed at which it was moving. the function they use is Skid Mark Formula.

An automobile, or car, is a wheeled motor vehicle used for transportation. Most definitions of cars say they run primarily on roads, seat one to eight people, have four tires, and mainly transport people rather than goods. Cars come in a variety of makes, models, and body styles. They are distinguished from other motor vehicles, such as motorcycles, buses, trucks, and vans, by their passenger capacity, size, and cargo capacity. Automobiles are powered by an internal combustion engine, usually fueled by gasoline or diesel, and are propelled by either an automatic or manual transmission. Self-driving cars are now available in some parts of the world.

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To store 2.70x10^-3 J of electrical energy, capacitance c3 in the network must be 2.67μF. This can be calculated using the formula for energy stored in a capacitor network.

A network of capacitors is a collection of capacitors wired into a circuit. The capacitors store electrical energy as an electric field between their plates when a voltage is applied across the network. The formula E = 1/2 * C * V2 may be used to determine the total energy held in a capacitor network, where E is the energy held, C is the network's total capacitance, and V is the applied voltage. The capacitances of c1, c2, and c4 in this instance are specified as 4.00 F, 4.00 F, and 8.00 F, respectively. It is possible to determine that the capacitance c3 has to be 2.67 F to store 2.70 x 10-3 J of electrical energy by rearranging the formula and inserting the numbers.

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Answer:

C

Explanation:

The gravitational force of the Sun increased

If  the mass of the Sun increased during the formation of the solar system, the gravitational force of the Sun increased.

A massive concentration of interstellar gas and dust formed a molecular cloud that would become the sun's birthplace before the solar system existed. Cold temperatures caused the gas to clump together, increasing its density steadily.

Gravity continued to collapse the material onto the developing solar system, resulting in the formation of a star and a disc of material from which the planets would form. According to NASA, the newborn sun eventually accounted for more than 99% of the mass of the solar system (opens in new tab).

When the pressure inside the star became so high that fusion occurred, converting hydrogen to helium, the star began to blast a stellar wind, which helped clear out debris and prevented it from falling inward.

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Answer:

Hai quả cầu nhỏ hoàn toàn giống nhau, mang điện tích q1, q2 đặt trong chân không cách nhau 20cm thì hút nhau F = 5×10^-5. đặt vào giữa hai quả cầu tấm thủy tinh dày 5 cm có hằng số điện môi là 4. tính lực tác dụng giữa hai quả cầu

E = P t = I a t yields the sound energy impinging just on microphone per second.

False. A microphone normally has very little probability of being damaged by loud noise. SPLs over 150dB can be handled using a dynamic microphone. Without placing a microphone inside a jet engine's exhaust, that volume cannot be created.

As sound waves travel through the ear canal, THE EAR DRUMS VIBRATE. Three connected bones in the eardrum allow vibrations to pass through. This motion STARTS THE MOVEMENT OF THE INTERNAL EAR FLUID. As a result of the fluid moving, numerous microscopic hair-like cells flex and convert vibrations into nerve impulses.

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Answer:

True

Explanation:

When a net force of 10 N applied on a 3 kg object, after it has moved 5 m, the velocity of the object is 5.77 m/s

When a force F applied on m kg mass, then according to the Newton 2nd law of motion, the object will acquire an acceleration:

a = F/m

From the problem,

F = 10 N

m = 3 kg

Hence, the acceleration is:

a = 10/3 m/s²

The relation between the velocity, distance, and acceleration is:

v² = u² + 2.a.s

Where:

v = final velocity

u = initial velocity

s = distance

Since the object is initially at rest, hence u = 0

Therefore,

v² =  2.a.s

v² =  2.10/3 . 5

v² =  100/3

v = 5.77 m/s

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In order for a single magnifying glass to magnify an object, the lens must have a convex shape.

A convex lens curves outward and is thicker at the center than at the edges. When light passes through a convex lens, it refracts or bends inward, converging at a focal point. This allows the lens to create a magnified image of the object being viewed.

The distance between the object and the lens, as well as the distance between the lens and the viewer's eye, will also affect the magnification. Additionally, the lens must be positioned at the correct distance from the object to produce a clear, focused image.

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After 15 years, approximately 0.319 lb (or 0.319 pounds) of the radioactive chemical will remain in the atmosphere.

The decay rate of the chemical is approximately 5% per year, which means that each year, 95% of the chemical will remain after decay. This can be expressed as a decay factor of 0.95.

Since the chemical is released into the atmosphere at a constant rate of 1 lb per year for 15 years, we can calculate the amount remaining using the formula:

Remaining amount = Initial amount * Decay factor^Number of years

In this case, the initial amount is 1 lb, the decay factor is 0.95, and the number of years is 15. Plugging these values into the formula, we get:

Remaining amount = 1 lb * (0.95)^15

Calculating this expression, we find:

Remaining amount ≈ 0.319 lb

After 15 years, approximately 0.319 lb of the radioactive chemical will remain in the atmosphere. The decay rate of 5% per year gradually reduces the amount of chemical present, resulting in a relatively small fraction remaining after 15 years.

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Answer:

V=2.6m/s

Explanation:

velocity=Distance/time

V=78/30=2.6m/s

Answer:

True.

Explanation:

In biology, selective breeding is the mechanism by which certain traits or a combination of traits are consciously selected in animal breeding or plant breeding and cultivation. Artificial selection is seen as a counterpart to natural selection, the mechanism by which, in nature, individuals are selected who are better adapted to their natural environment. Both processes have the same genetic principles and background.  Man selects the individuals with the desired traits to produce progeny, making these traits more and more common.

Conservation of energy is demonstrated by Calorimeter because the calorimeter is based on the conservation of energy.

The conservation of energy principle states that in a closed system, the energy of interacting objects or particles remains constant.

The energy conservation principle states that energy is neither created nor destroyed during a chemical reaction.

In terms of calorimetry, this indicates that the sample or reaction within the calorimeter must have given out heat for the water inside to gain heat.

This culminates that yes, the heat calorimeter demonstrates the law of conservation of energy.

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Answer:

8.22m

Explanation:

As interpreted from this problem, the angle of launch is 90 degrees as it is thrown straight up. Given an angle launch of 90°, upward initial velocity of 12.7m/s, and initial height of 0m. A much simpler equation can be used to find the maximum height.

\(h_{max} = h_ {0} + \frac{{v_0}^{2} }{2g}\)

this means that the max height is equal to the initial height plus the initial velocity squared divided by 2 times the acceleration of earth's gravity(≈9.8m/s^2 or 10m/s^2 depending on how you fix it).

when substituted into the equation, you should get.

(9.8m/s^2)

hmax = 0 + ((12.7)^2)/(2*9.8)

hmax = 161.29/19.6 ≈ 8.22

hmax = 8.22m

A billiard ball moves with 3 kg⋅m/s of momentum and strikes three other billiard balls that have been just sitting there at rest and not moving.

The total momentum of all four balls after the collision is 3 kg⋅m/s, because momentum is not created or destroyed.  The total amount of it after an event is the same as the total amount of it before the event.

The momentum of the billiard balls after the collision is 3 Kgm/s.

Given the following data:

To find the momentum of the balls after the collision:

Momentum is simply a multiplication (product) of the mass of an object with its velocity.  Also, momentum is a vector quantity because it has both magnitude and direction.

Mathematically, momentum is given by the formula;

\(Momentum = Mass\) × \(Velocity\)

\(Total \; momentum = Momentum \; B + Momentum \;of \;the \;other\; balls.\)

Since the other billiard balls were at rest (not experience any motion), there velocities would be zero (0) m/s.

Substituting the given values, we have:

\(Total \; Momentum = 3 + 0\)

Total momentum = 3 Kgm/s.

Therefore, the momentum of the billiard balls after the collision is 3 Kgm/s.

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Answer:  NOx and VOC combine chemically with oxygen to form ozone

Explanation:

Answer:

Explanation:

1. they wouldn't move really fast and would be very close together

2. They would move very fast and be away from each other

To determine the diameter of the cylindrical rod that can withstand a load of 650 N, we need to consider the yield strength of the material and the applied load. the diameter of the rod is approximately 11.62 mm.

By using the formula for stress (force divided by area) and rearranging it to solve for the diameter, we can find the required diameter of the rod.

The stress experienced by the rod can be calculated using the formula:

Stress = Force / Area

Given that the yield strength of the steel is 310 MPa, we can set up the equation:

310 MPa = 650 N / (π * (diameter/2)^2)

We can rearrange the equation to solve for the diameter:

diameter = √(650 N / (310 MPa * π)) * 2

Substituting the given values, we find:

diameter ≈ √(650 / (310 * 10^6 * π)) * 2 ≈ 11.62 mm

Therefore, the required diameter of the rod to withstand the load is approximately 11.62 mm.

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Both Newton's laws and Kepler's third law can be used to estimate the mass of the black hole in M87, and combining the information obtained from both methods has led to the discovery that the black hole is approximately 6.5 billion times the mass of the sun.

Yes, both Newton's laws and Kepler's third law can be used to determine the mass of the central black hole in M87 by analyzing the motion of the hot gas orbiting the nucleus.

Newton's laws of motion can be applied to the orbiting gas to determine the centripetal force acting on it, which is related to the gravitational force between the gas and the central black hole. This, in turn, can be used to calculate the mass of the black hole.

Kepler's third law can also be used to determine the mass of the black hole by analyzing the orbital period and distance of the gas from the black hole. The law states that the square of the orbital period is proportional to the cube of the semi-major axis of the orbit, which can be used to calculate the mass of the black hole.

By combining the information obtained from both methods, astronomers have been able to estimate the mass of the central black hole in M87 to be approximately 6.5 billion times the mass of the sun. This groundbreaking discovery was made possible by the Event Horizon Telescope, which is a network of telescopes that are able to observe black holes and their surroundings in unprecedented detail.

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Answer:

C

Explanation:

Answer:

i think the answer  is a because of division

Explanation:

To identify a satirical tone, look for words an author uses to exaggerate a particular character behavior to make that person appear ridiculous to the reader. The statement is True.

What a person thinks upon a situation and get through it makes the character of a person and defines his behavior.

Given is a statement "To identify a satirical tone, look for words an author uses to exaggerate a particular character behavior to make that person appear ridiculous to the reader".

The words used by the person forms the character. So, the author searches for the word which says about his character but the reader finds it ridiculous.

Thus, the statement is true.

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Answer:

speed

Explanation:

according to your question, your answer is speed

Answer:

some far beyond the edge of the solar system called the Oort Cloud, and some beyond Neptune in a region called the Kuiper Belt.

Explanation:

Hopefully this helps