Two forces 80newtons and 100newtons at an angle of 60°with each other pull on an object. Find what the single force would replace the two forces

Answer:

Explanation:

Density = mass / volume

density = 2.4

volume = 100 cm^3

2.4 = m / 100     Multiply both sides by 100

2.4 * 100 = m

m = 240 grams

The two things that must exist for an electric current to be produced are:

An electric potential between two bodies and a conducting path joining the bodies.

This comes from the fact that when there is a potential difference there is an electrical field and hence a force that makes some free charges to move in the conductor. For this reason, there's an electrical current.

Answer: An electric potential between two bodies and a conducting path joining the bodies

The normal force that the counter exert on the box of cereal in upward direction is 3.8 N.

A contact force is a normal force. A normal force cannot be applied between two surfaces that are not in contact. For instance, if a table and a box's surfaces are not in contact, they cannot exert typical pressures on one another.

In contrast, when two surfaces (such as a box and a table) come into contact, they exert a normal force on one another that is perpendicular to the contacting surfaces. The strength of this normal force will be as great as is required to stop the surfaces from piercing one another.

Given:

Weight of the box is 3.8 N.

So,  the normal force that the counter exert on the box of cereal is 3.8 N and it acts upwards.

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It tells us that a toy has a mass of 3.0 kg, with a speed of 4.0 m/s.

We apply the following formula:

Ec = m * v²/2

We replace data and solve:

Ec = 3.0 kg* (4.0 m/s)²

Ec = 3.0 kg* 16 m²/s²/2

Ec = 48 kg * m²/s²/2

Ec = 24 kg * m²/s²

Ec = 24 N * m ========> Joules units

Ec = 24 J

The average force on the squid during the ejection of 0.60 kg of water at a velocity of 15.0 m/s in 0.15 seconds is 60 N.              

We can calculate the average force with the average acceleration as follows:

\( F = m\overline{a} \)   (1)

Where:

The average acceleration is given by the change of velocity in an interval of time

\( \overline{a} = \frac{v_{f} - v_{i}}{t_{f} - t_{i}} \)   (2)

Where:

Now we can find the average force after entering equation (2) into (1)

\( F = m(\frac{v_{f} - v_{i}}{t_{f} - t_{i}}) = 0.60 kg(\frac{15.0 m/s - 0}{0.15 s}) = 60 N \)  

Therefore, the average force on the squid during the propulsion is 60 N.

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The kinetic energy of the cart is 0.0293 J.

The formula for calculating kinetic energy (KE) is KE = 1/2 * m * v², where m is the mass of the object and v is its velocity.

Plugging in the given values, we get:

KE = 1/2 * 0.5062 kg * (0.33 m/s)²

= 1/2 * 0.5062 kg * 0.1089 m²/s²

= 0.0293 joules (J)

Kinetic energy is a type of energy that an object possesses by virtue of its motion. Any object that is in motion, regardless of its mass, has kinetic energy. The amount of kinetic energy an object has is directly proportional to its mass and the square of its velocity. The formula for calculating kinetic energy is KE=1/2mv², where KE is the kinetic energy, m is the mass of the object, and v is the velocity of the object.

The unit of measurement for kinetic energy is Joules (J). Kinetic energy is an important concept in physics and is used to describe the behavior of objects in motion. The concept of kinetic energy is important in fields such as engineering, physics, and mechanics, as it provides a way to analyze the motion of objects and calculate their behavior in different situations.

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The way to perform the experiment is illustrated below.

Place each straw tightly without deforming the roundness of the straw into the corner of the set square.

Measure the distance from the corner of the set square to where the straw touches the set square using the 30 cm ruler. This will be the radius of each straw.

Multiply this radius by 2 in order to obtain the diameter of each straw.

Sum the diameter of each of the 10 straws.

Divide this sum by 10 to obtain the average value for the diameter of a straw.

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The correct option is B, Standing waves result from the superposition of two waves that have the same amplitude and frequency and opposite directions of propagation .

Amplitude is a fundamental concept in physics and refers to the maximum displacement or distance of an oscillating system from its equilibrium position. It is commonly used to describe the magnitude of a wave or vibration, and is measured in units such as meters or volts.

In the context of waves, amplitude represents the maximum height or depth of the wave crest or trough, and is often used to describe the intensity or strength of the wave. In sound waves, amplitude is directly related to the loudness or volume of the sound, with larger amplitudes corresponding to louder sounds. In electrical engineering, amplitude refers to the maximum voltage or current of an alternating current (AC) waveform.

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Complete Question:-

Standing waves result from the superposition of two waves that have

a. the same amplitude, frequency, and the direction of propagation.

b. the same amplitude and frequency and opposite directions of propagation .

c. the same amplitude, slightly different frequencies, and the same direction of propagation.

d.the same amplitude, slightly different frequencies, and opposition directions of propagation

We can make the changeover to renewable energy and create a wealthy, sustainable society for future generations with careful planning and consideration.

Energy is the capacity to carry out activity or bring about systemic change. Mechanical energy, thermal energy, chemical energy, nuclear energy, and electromagnetic energy are just a few of the various forms it can take.

The kind of energy we consume is essential to building a society that will maintain our environment and society for future generations. We must take into account how our society's structure and the resource's effects on it interact while deciding on the primary source of power generation. Using sustainable energy sources to produce electricity is one choice. Examples include solar and wind energy.

There are several benefits to renewable energy, including its abundance and sustainability. Renewable energy sources like solar and wind power are getting more and more attention.

By 2025, renewable energy sources are anticipated to be the greatest source of electricity, according to the International Energy Agency (IEA). We can lessen our dependency on fossil fuels, which are limited resources that contribute to climate change, water pollution, and air pollution, by using renewable energy. Also, using renewable energy can boost the economy and add new jobs.

Renewable energy does have a few drawbacks, though. Renewable energy sources are frequently intermittent, which means they are not constantly accessible, which is one possible problem. The management of energy supply and demand may become difficult as a result. Moreover, constructing infrastructure for renewable energy sources might be expensive initially, but the advantages over time may outweigh these expenses.

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According to the question the speed of pulse is = 0.33m/s

Velocity is the pace and direction of either an object's movement, whereas speed is now the time rate which an object is travelling along a path. In other words, velocity is a vector, whereas speed would be a scalar value. If you determine how far an object travels in a certain amount of time, you can calculate its speed.For instance, an automobile is moving at a pace of 70 miles per hour if it covers 70 miles in an hour .

The equation for speed can be obtained by simply dividing time by distance.

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The load is inductive or capacitive depending on whether the imaginary part of the impedance (Z) is positive or negative. In this case, the imaginary part of Z is 60 Ω, which is positive. Therefore, the load is inductive.

The power factor (PF) can be determined by taking the cosine of the angle of the impedance. In this case, the angle is 30 degrees. So, the power factor is given by:

PF = cos(30°) = 0.866

Therefore, the power factor is 86.6%.

The power (P) can be calculated by multiplying the magnitude of voltage (V) with the magnitude of current (I) and then multiplying it by the power factor (PF). In this case, the magnitude of voltage is 1500√2 volts and the power factor is 0.866. Assuming the load is purely resistive, the current magnitude can be calculated using Ohm's law:

I = V / Z = 1500√2 ∠ 30° / (70 + j 60) = 17.32∠-18.44° A

Therefore, the power is:

P = |V| * |I| * PF = 1500√2 * 17.32 * 0.866 = 36722.86 watts (or 36.7 kilowatts)

The reactive power (Q) can be calculated by multiplying the magnitude of voltage (V) with the magnitude of current (I) and then multiplying it by the sine of the angle of the impedance. In this case, the angle is 30 degrees. So, the reactive power is:

Q = |V| * |I| * sin(30°) = 1500√2 * 17.32 * sin(30°) = 10000 VAR

The apparent power delivered to the load (S) can be calculated by multiplying the magnitude of voltage (V) with the magnitude of current (I). In this case, the apparent power is:

S = |V| * |I| = 1500√2 * 17.32 = 25985.08 volt-ampere (or 25.99 kilovolt-ampere)

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a. more gravity

This is the answer.

The 1 repetition maximum (1 RM) refers to the maximum amount of resistance you can move one time. Option C is correct.

The 1 repetition maximum (1 RM) is a measure of the maximum amount of resistance an individual can lift in a single repetition of a given exercise. It is commonly used in strength training to determine an individual's level of strength and to develop an appropriate training program.

The 1 RM is typically determined by gradually increasing the resistance until the individual can no longer lift the weight with proper form. This maximum amount of resistance lifted is then recorded as the 1 RM. By using the 1 RM as a benchmark, individuals can track their progress over time and adjust their training program accordingly to continue making gains in strength. Hence, option C is correct.

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Answer:

Final velocity = 19 m/s

Explanation:

Initial velocity (u) = 4 m/s

Acceleration (a) = 0.5 m/s²

Time (t) = 30 s

Final velocity (v) = ?

In this question, you must use the formula:

v = u + at

Substitute the values into the formula.

v = 4 + (0.5 × 30)

v = 4 + 15

v = 19 m/s

The energy that an object has due to its location in a gravitational field is known as gravitational potential energy. GPE = mgh is the formula for gravitational potential energy. GPE = 1200(1.6)(350) = 672000 J

If an object is located at a height that is higher (or lower) than the zero height, it has gravitational potential energy. If an object is situated on an elastic media in a position other than the equilibrium position, it has elastic potential energy.

By utilizing a pump, crane, or engine to raise a mass to a specific height, gravity batteries can store gravitational potential energy. Depending on the mass of the object and also how high it was lifted, the mass now retains a specific gravitational potential energy after being raised.

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Answer:

ethylene

Explanation:

ethylene is a compound consist of two double bonded carbon atom and four hydrogen atoms at room temperature is a gas

Answer:

Ethylene

Explanation:

Because Ethylene is a simple molecule composed of two double-bonded carbon atoms and four hydrogen atoms. It's a gas at room temperature. Ethylene molecules can be chemically bonded, end to end, to form a polymer named polyethylene.

Astronomers will never directly observe the first few minutes after the Big Bang because of several reasons.

The correct answer is (d) before the cosmic microwave background was emitted, the Universe was opaque. In the early stages of the Universe, before the emission of the cosmic microwave background radiation, the Universe was filled with a dense and hot plasma. This plasma was highly energetic and opaque, meaning that light could not freely travel through it. As a result, photons were scattered and absorbed by the plasma, preventing their direct observation. It was only after the Universe expanded and cooled enough for the plasma to recombine into neutral atoms that the Universe became transparent to light, allowing the cosmic microwave background radiation to be emitted.

The other options are not correct for the given question. While redshifting of light does occur and inflation did make the early Universe expand rapidly, they are not the main reasons why the first few minutes after the Big Bang are not directly observable. Similarly, the merging of forces occurred at earlier stages, not specifically during the first few minutes. The primary reason is the opacity of the Universe before the emission of the cosmic microwave background radiation.

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The distance moved the rock is determined as 2 m.

The distance moved the rock is calculated as follows;

P.E = mgh

where;

h = P.E / mg

h = ( 100 J ) / ( 20 kg x 2.5 N/kg)

h = 2 m

Thus, the distance moved by the rock is a function of gravitational potential energy, which is the energy possessed by a body due to its position above the ground.

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The reduction of a digital audio file size can be achieved by none of the following options, as all answers are false (Option D).

Reducing the amplitude of the audio (option a) would result in a decrease in volume, but it wouldn't necessarily reduce the file size. The file size of a digital audio file is primarily determined by the duration and the sampling rate, not the amplitude.

Reducing the dynamic range and the pitch of sound (option b) may affect the perceived quality of the audio, but it wouldn't necessarily reduce the file size. The dynamic range refers to the difference between the loudest and softest parts of the audio, and reducing it may result in loss of detail and fidelity. Changing the pitch would alter the perceived frequency content of the audio but would not directly affect the file size.

Reducing the original signal frequency (option c) would involve lowering the sampling rate, which could indeed reduce the file size. However, it would also result in a loss of high-frequency content and potentially degrade the audio quality.

Therefore, none of the options mentioned (a, b, or c) directly lead to a reduction in the file size of a digital audio file. The size of an audio file can be reduced through different compression techniques such as lossy compression algorithms like MP3 or AAC, which discard some of the audio data that is less perceptually important. These compression algorithms exploit perceptual limitations of human hearing to reduce the file size while attempting to maintain an acceptable level of audio quality.

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The resultant force on the object is

∑ F = 〈0, 8〉 N + 〈6, 0〉 N = 〈6, 8〉 N

which has a magnitude of

F = √((6 N)² + (8 N)²) = √(100 N²) = 10 N

By Newton's second law, the acceleration has magnitude a such that

F = m a

10 N = (2 kg) a

a = (10 N) / (2 kg)

a = 5 m/s²

so the answer is B.

Answer:

36.5 kJ

Explanation:

Energy by machine = energy to machine × efficiency

E = 52.1 kJ × 0.70

E = 36.5 kJ

If the water around the hot metal was not stirred but the thermometer was rested away, the temperature readings you obtain may not be representative of the actual temperature of the water.

Stirring the water is important in a heat capacity experiment because it ensures that the temperature is uniform throughout the water. If you don't stir the water during the experiment, the temperature readings you take will only reflect the temperature of the part of the water that is closest to the thermometer, rather than the temperature of the entire sample.

If the water around the hot metal was not stirred but the thermometer was rested away, the temperature readings you obtain may not be representative of the actual temperature of the water. This is because the temperature around the hot metal will be higher than the temperature in other parts of the water that are not in direct contact with the metal.

As a result, the measured heat capacity value may be higher or lower than the actual value, depending on the extent to which the temperature around the metal deviates from the average temperature of the entire water sample.

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Answer:

T = 1.2 s

T = 15.1 m = 15 m

Explanation:

This is a case of projectile motion:

TOTAL TIME OF FLIGHT:

The formula for total time of flight in projectile motion is:

T = 2 V₀ Sinθ/g

where,

T = Total Time of Flight = ?

V₀ = Launch Speed = 13.9 m/s

θ = Launch Angle = 25°

g = 9.8 m/s²

Therefore,

T = (2)(13.9 m/s)(Sin 25°)/(9.8 m/s²)

T = 1.2 s

RANGE OF BALL:

The formula for range in projectile motion is:

R = V₀² Sin2θ/g

where,

R = Horizontal Distance Covered by ball = ?

Therefore,

T = (13.9 m/s)²(Sin 2*25°)/(9.8 m/s²)

T = 15.1 m = 15 m

Answer:

1.2s for the first one

15.1m for the second one on time4learning

Explanation:

The force ratio fp/fe is equal to 1. This is because the unsigned charges of the proton and the electron are equal, and they experience the same electric field. The magnitude of the electric force experienced by a charged particle in an electric field at a position is equal to the product of the electric field and the unsigned charge of the particle.

F = qE

where

F is the force

q is the charge

E is the electric field

The proton and the electron have the same charge, so the magnitude of the force they experience is equal. The electric field is also the same, so the force ratio fp/fe is equal to 1.

fp/fe = q_p E / q_e E = 1

In other words, the force on the proton is equal to the force on the electron.

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If a car is moving to the left with a constant velocity, one can conclude that The net force acting on the car is zero. The car's velocity is unchanging, its speed and direction are not changing over time. The car is in uniform motion.

Uniform motion and non-uniform motion refer to the motion of an object in a straight line. Uniform motion is defined as motion in a straight line at a constant speed. Non-uniform motion, on the other hand, is defined as motion in a straight line at a changing speed.

The constant velocity of the car to the left does not necessarily mean that the car is at rest or has zero acceleration. A constant velocity can still result from non-zero net force acting on an object.

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