What is the centripetal force of an object undergoing uniform circular motion when its radius is doubled and its speed remains constant?
A.
the same as before
B.
twice as great as before
C.
half as great as before
D.
four times as great as before

Answer:

Explanation:

Let\(\alpha\)  be the angle

\(tan\alpha = Ay/Ax=88.4/174= .508\\\)

or 26.9 degrees NE

The answer is option (b) irreflexive, i.e., "is not married to." Therefore, we can conclude that the irreflexive is "is not married to".

Here are two relations: "is married to" and "is not married to." Supposing the universe is the set of all living human beings, which of these is irreflexive.

The irreflexive is "is not married to".What is irreflexive. In Mathematics, a binary relation R over a set X is irreflexive if and only if no element of X is associated with itself under the relation. Symbolically, ∀x ∈ X, ¬(xRx).

For example, the "greater than" relation is irreflexive on the real numbers because no real number is ever greater than itself.

What is a binary relation A binary relation R from a set A to a set B is a subset of the Cartesian product A × B, where A and B are arbitrary sets.In this case, the universe is the set of all living human beings.

Therefore, the relation "is married to" is not irreflexive. However, the relation "is not married to" is irreflexive since no human being is not married to themselves.

Thus, the answer is option (b) irreflexive, i.e., "is not married to."Therefore, we can conclude that the irreflexive is "is not married to".

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The relation "is married to" is reflexive, while the relation "is not married to" is irreflexive. Neither relation is symmetric, asymmetric, or antisymmetric.

The relation "is married to" is an example of a reflexive relation, while the relation "is not married to" is an example of an irreflexive relation.

(a) Reflexive: A relation is reflexive if every element in the set is related to itself. In the case of the relation "is married to," every person in the universe of all living human beings is married to themselves. For example, John is married to John, Mary is married to Mary, and so on. This satisfies the condition of reflexivity.

(b) Irreflexive: A relation is irreflexive if no element in the set is related to itself. In the case of the relation "is not married to," no person in the universe of all living human beings is not married to themselves. This means that everyone is married to themselves, which contradicts the condition of irreflexivity.

The relations "is married to" and "is not married to" are not symmetric, asymmetric, or antisymmetric because they do not satisfy the respective conditions for these properties.

(c) Symmetric: A relation is symmetric if for every element (x, y) in the relation, the element (y, x) is also in the relation. In the case of the relation "is married to," if John is married to Mary, it does not necessarily mean that Mary is married to John. Therefore, the relation is not symmetric.

(d) Asymmetric: A relation is asymmetric if for every element (x, y) in the relation, the element (y, x) is not in the relation. In the case of the relation "is married to," if John is married to Mary, it is not possible for Mary to be married to John. Therefore, the relation is not asymmetric.

(e) Antisymmetric: A relation is antisymmetric if for every element (x, y) in the relation, where x is not equal to y, if (x, y) is in the relation, then (y, x) is not in the relation. In the case of the relation "is married to," if John is married to Mary, it is not possible for Mary to be married to John. Therefore, the relation is antisymmetric.

In summary, the relation "is married to" is reflexive, while the relation "is not married to" is irreflexive. Neither relation is symmetric, asymmetric, or antisymmetric.

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The equivalent resistance of the circuit will be option (D) 80.0 Ω

According to Ohm's law, the voltage across two places is precisely proportional to the current flowing through a conductor between them.

The obstruction to current flow in an electrical circuit is measured by resistance. The Greek letter omega (Ω) represents the unit of measurement for resistance, known as ohms. Georg Simon Ohm is the name given to ohms.

Since in the given figure the resistance are in series so there equivalent resistance will be sum of the two resistance. If they were in parellal connection then we will add reciprocal of their resistance.

Let R1 = 60 Ω and R2 = 20 Ω. So their equivalent resistance will be as follow:

R = R1 + R2

R = 60 + 20

R = 80 Ω

Hence the equivalent resistance of the circuit will be 80 Ω

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In science, a hypothesis is a tentative explanation of an observation, while a scientific theory is a broader, well-tested explanation for a natural phenomenon backed by multiple lines of evidence.

In the scientific method, a hypothesis is an initial explanation or proposed solution to a specific observation or problem. It is often based on limited evidence or previous knowledge and serves as a starting point for further investigation. A hypothesis is testable and can be supported or refuted through experimentation or further observations. It represents a possible explanation that requires empirical evidence to validate or invalidate its validity.

On the other hand, a scientific theory is a well-established and comprehensive explanation for a natural phenomenon that has been extensively tested and supported by multiple lines of evidence. Unlike a hypothesis, a scientific theory goes beyond a single observation or experiment. It encompasses a broad range of observations, experimental results, and logical reasoning. A scientific theory provides a framework that can explain and predict various related phenomena. It is subject to ongoing scrutiny and refinement, but its validity and acceptance are based on its consistency with empirical evidence and its ability to make accurate predictions.

In summary, while a hypothesis is a tentative explanation of an observation, a scientific theory is a broader and well-tested explanation that is supported by multiple lines of evidence and can account for a range of related phenomena.

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The comparison between the distance traveled by the bullet compared with the distance traveled by the rifle at the same time shows that the bullet travels faster than the rifle due to greater acceleration.

Newtown's third law of motion states that for every action there is a reaction having equal magnitude but opposite direction.

In the case of bullet and rifle, both experience the same amount of force that is equal in magnitude but opposite in direction.

In physics, mass and acceleration have an indirect relation with each other i.e a = F/m. More mass means less acceleration and vice versa.

A rifle has a smaller amount of acceleration than a bullet. It is because the mass of the rifle is greater than the bullet therefore it covers less distance a s compare to a bullet having less mass and greater acceleration and thus travels faster.

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Answer:

Force = 7N

Explanation:

Force = Mass x Acceleration = 2 x 3.5 = 7N

The answer to the given question is option C: 40.4°F. Let's see the explanation below.How to find the temperature difference across a properly operating electric furnace?

]We know that the temperature difference across a properly operating electric furnace is given by:ΔT = (Q / (1.08 * CFM))where,Q is the rate of heat input in BTU/hr,1.08 is the factor to convert CFM to lb/min,and CFM is the rate of air flow in cubic feet per minute.So, here,ΔT = (Q / (1.08 * CFM))

Given,The rate of heat input = 10 kW = 34,120 BTU/hrThe rate of air flow = 900 CFMPlugging these values in the above equation, we get:ΔT = (34,120 / (1.08 × 900))ΔT = 40.4°FTherefore, the temperature difference across a properly operating electric furnace that is using a 10-kW electric heater and is moving 900 cfm of air is 40.4°F. Hence, the main answer is option C.

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The temperature difference across the electric furnace is approximately 30.2°F (option A).

To calculate the temperature difference across the electric furnace, we can use the formula:

Temperature difference (ΔT) = Heat (Q) / (Airflow rate * Specific heat capacity * Density)

First, let's convert the power of the electric heater from kilowatts (kW) to watts (W):

10 kW = 10,000 W

Next, we need to determine the specific heat capacity of air. Typically, it is around 0.24 BTU/lb°F.

Since the given airflow rate is in cubic feet per minute (cfm), we need to convert it to pounds per minute (lb/min) using the density of air. The density of air at standard conditions is approximately 0.075 lb/ft³.

Converting 900 cfm to lb/min:

900 cfm * 0.075 lb/ft³ = 67.5 lb/min

Now we can substitute the values into the formula:

ΔT = 10,000 W / (67.5 lb/min * 0.24 BTU/lb°F * 0.075 lb/ft³)

Simplifying the equation:

ΔT = 10,000 W / (67.5 * 0.24 * 0.075) (lb/min * BTU/lb°F * lb/ft³)

Calculating the result:

ΔT ≈ 30.2°F

Therefore, the temperature difference across the electric furnace is approximately 30.2°F, which corresponds to option A.

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Answer:

i) 180m ii) 6sec ii)180m

Explanation:

i) Hmax = U²/2g

= 60²/20

= 3600/20= 180m

ii). Tmax= U/g

= 60/10= 6sec

iii). X= ut²+ 1/2gt²

since U is 0,then ut=0

X=0+ 1/2×10×6²

X=5×36= 180m

hope its clear??

Planetary winds and currents have a significant impact on the Earth's climate and weather patterns. They are influenced by a variety of factors such as solar radiation, the rotation of the Earth, and temperature gradients.

Planetary winds and currents move in the same direction, assisting in the transport of heat and moisture around the world. For example, trade winds move from subtropical high-pressure zones to equatorial low-pressure zones, whereas prevailing westerlies move from west to east. Warm currents flow from the equator to the poles, and cold currents flow from the poles to the equator, as do ocean currents. The direction and strength of planetary winds and currents influence climate and weather patterns in various parts of the world.

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Answer:

they would repel because they have the same charge. Charges that are different will stick together.

The strength of gravity of planets Jupiter and Pluto are 23.1m/s² and  0.6m/s² respectively.

We are given that,

The mass of the shoes =  m=0.500 kg

The weigh  of the shoes on the Jupiter = W₁=11.55 N

The weigh of the shoes on the Pluto = W₂=0.3 N

Therefore, the weight to mass ratio determines the strength of gravity, or the acceleration caused by gravity.

\(g_{j} = \frac{w_{1} }{m}\)

Putting the values in above equation we can get,

\(g_{j} = \frac{11.55N}{0.500kg}\\ g_{j} = 23.1m/s^{2}\)

Since, the gravity strength of planet Jupiter would be 23.1m/s²

\(g_{p} =\frac{w_{2} }{m} \\g_{p} = \frac{0.3N}{0.500kg} \\g_{p} = 0.6 m/s^{2}\)

Thus, the gravity strength of planet Pluto may be 0.6m/s².

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A automobile stopped after driving 50 meters at the a pace of 20 m / sec. Count on the rate of slowing being constant. Us = 0.5 and Uk = 0.03 are indeed the coefficient of friction between the seat and the user.

A force known as friction works between two systems to stop any motion including attempted motion. Its normal force N that has been bringing the systems together has an inverse connection with the simple friction.

Here following is an overview of friction's detrimental effects: Friction among various mechanical parts causes a substantial quantity of heat to be wasted as heat. Since movement is constrained, it takes more energy to go around it. Using a machine when it is making noise is useless and irritating.

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a. The spring constant of the spring be 40 N/m.

b. To stretch it by 1.5 m, required force be 60 N.

In accordance with Hooke's law, a principle of elasticity, for relatively minor deformations of an object, the displacement or size of the deformation is directly proportional to the deforming force or load When the load is removed under these circumstances, the object resumes its original size and shape.

According to Hooke's rule, solids behave elastically when their constituent molecules, atoms, or ions move slightly from their normal places. This movement is proportional to the force that caused it.

a. The spring constant of the spring be: k = 20 N/0.5m = 40 N/m.

b. To stretch it by 1.5 m,  required force = 40×1.5 N = 60 N.

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Measured across the contacts of a source of potential difference under any current flow condition: Terminal voltage. The correct option is (b).

Terminal voltage is the measured voltage across the contacts of a source of potential difference under any current flow condition.

When a current flows through a circuit, there can be a voltage drop across various components, such as resistors or conductors.

However, the terminal voltage refers specifically to the voltage measured across the terminals or contacts of the actual source of potential difference, such as a battery or power supply.

The terminal voltage represents the effective voltage available from the source to be used in the circuit. It takes into account any internal resistance or losses within the source itself.

The terminal voltage is the voltage that can be utilized by the connected devices or components in the circuit.

In contrast, the electromotive force (EMF) refers to the maximum potential difference that the source can provide when no current is flowing. It represents the ideal voltage output of the source without considering any internal resistance or losses.

Therefore, among the given options, the correct choice for the measured voltage across the contacts of a source of potential difference under any current flow condition is b) Terminal voltage.

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If an object is observed to orbit the Sun in an orbit with an eccentricity of 0.9, it is likely to be a comet.

Comets are small celestial bodies that have highly elliptical orbits around the Sun, and they are composed of dust, ice, and small rocky particles. As a comet gets closer to the Sun, the heat causes the ice to sublimate and creates a bright coma, which can be visible from Earth. The eccentricity of a comet's orbit can be very high, which means that it can spend most of its time in the outer reaches of the solar system before making a fast and dramatic approach to the Sun.

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Answer:



Explanation:

These small lights are usually phosphenes, a visual phenomenon caused by mechanical stimuli resulting in pressure or tension on the eye when the eyelids are

If a truck in front of your car begins to turn left, but its right turn signals are flashing, it is most likely that the truck driver is making a mistake or he is not conscious of his driving

Traffic light can simply be defined as a set of automatically operated coloured lights such as red, amber, and green, for controlling traffic at road junctions, pedestrian crossings and roundabouts.

Below are the meaning of some traffic light colours:

So therefore, if a truck in front of your car begins to turn left, but its right turn signals are flashing, it is most likely that the truck driver is making a mistake

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Answer:

40 m

Explanation:

The area under v-t graph gives the distance travelled by the particle.

Distance = area of ΔOBC + area of ΔCDE + area of ΔEFG

\(=\dfrac{1}{2}\times 4\times 10+\dfrac{1}{2}\times 2\times 10+\dfrac{1}{2}\times 4\times 5\\\\=40\ m\)

So, the distance travelled by the particle in the time interval t = 0 and t= 10 s is equal to 40 m.

Answer:

Please find the answer in the explanation.

Explanation:

Given that 16 g CH4 + 64 g 02 - 44 g CO2 + 36g H2O

To explain the law of conservation of mass and describe how the equation represents the law of conservation of mass, let me first start from law.

The law state that: mass can neither be created nor destroyed.

The mass of each element at the reaction side must be equal or the Same with the magnitude of mass at the product

The equation represents the law of conservation of mass because the mass of molecules at the right hand side is equal to or balance with the molecules at the left hand side. For example, the number of Oxygen, and othe elements are the at both side.

A particle with a small electric charge is moved in an electric field by an external force. When the particle is moved along an electric potential isoline, in what direction, if any, The force exerted by Perpendicular to the direction of the particle's motion.

“Electric Charge is the property of subatomic particles that causes it to experience a force when placed in an electric and magnetic field.”

Electric charges are of two types: Positive and Negative, commonly carried by charge carriers protons and electrons.

Examples of the types of charges are subatomic particles or the particles of matter:

Electric charge is a scalar quantity. Apart from having a magnitude and direction, a quantity to be termed a vector should also obey the laws of vector addition, such as triangle law of vector addition and parallelogram law of vector addition; only then the quantity is said to be a vector quantity. When two currents meet at a junction, in the case of an electric current, the resultant current of these will be an algebraic sum and not the vector sum. Therefore, an electric current is a scalar quantity, although it possesses magnitude and direction.

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Answer:

no it is not C they are tying to get point the answer is, B: In codominance and incomplete dominance, neither of the alleles are dominant

Answer:

the answer is B

Explanation:

Answer:

it is b on edge not d, well atleast for me it was b

Explanation:

Answer:

B) one battery, two switches, and three light bulbs

Explanation:

With the same continuous broadband masking noise, the 4000-Hz tone is probably harder to distinguish than the 1500-Hz tone.

Generally speaking, lower-frequency noises are more easily concealed or drowned out by ambient noise than higher-frequency ones. Lower-frequency sounds have longer wavelengths than higher-frequency ones, making them more susceptible to interference and phase cancellation from the noise.

Consequently, compared to the 1500-Hz tone, the 4000-Hz tone is perhaps more challenging to distinguish from the same continuous broadband masking noise. The 4000-Hz tone is more sensitive to being masked by background noise because of its higher frequency and shorter wavelength.

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Answer:

C

Explanation:

The correct answer should be the micrometer.

The micrometer is an instrument that is capable of measuring the component of an object to very high precision. It is used to obtain accurate measurements in engineering.

In the case of the copper wire, the diameter of 0.3 mm was an approximation and a more accurate measure of the diameter would be obtained by using the micrometer.

The correct option is C.

Frictional forces between wind and the ocean surface are the primary cause of surface waves. This is the first option.

The most common cause of waves is wind. Surface waves, also known as wind-driven waves, are formed by the frictional forces between wind and surface water. The continual disturbance creates a wave crest as wind blows across the surface of the ocean or a lake. Surface waves are found globally across the open ocean and along the coast.

There is also a type of waves called tidal waves. Tidal waves are caused by the gravitational pull of the Sun and Moon on Earth.

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