gravity is 3.71 m/s2. in the earth tests, when m is set to 15.0 kg and allowed to fall through 4.00 m, it gives 150.0 j of kinetic energy to the drum.

Answer:

The correct option is D

Explanation:

This question can be better understood when discussed using the Newton's first law of motion which states that an object would continue to move with a uniform speed (in a straight line) unless acted upon by an external force. What happens here (in the question) is that the bike rider would have continued moving at a constant speed (to the right) if not for the opposing force of the wind that acted against her (to the left). This wind/force would cause her speed to reduce or slow down (as posited by the law).

When a fragment of bone containing carbon-14 isotopes of the element carbon is discovered during an archaeological dig, and it is estimated to be approximately 23,000 years old, one can calculate the proportion of the carbon-14 isotopes that remains.

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If intensity is energy per unit area per unit time then how kinetic energy of photoelectron is constant with increasing intensity of light and it increases when frequency of light is increased

The amount of energy that a wave may transfer to a unit area of a surface each second is measured as the wave's intensity. (Watts per square metre are used to measure intensity.) A sound wave's frequency is equal to its rate of vibration, and its intensity is determined by its amplitude.

You may have the impression that the greater the frequency, the louder the noise we hear is, yet frequency does not indicate the volume of a sound. The energy of a vibration is quantified in decibels as intensity or loudness (dB). A sound has a high intensity if it is loud.

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Answer:

Increase air resistance

Explanation:

Gravity forces the parachute down but air resistance pushing up on the flat surface of the parachute causes it to fall slower to the ground.

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Accuracy and precision are two important concepts in measurement and data analysis.

Accuracy refers to how close a measurement or data point is to the true value. For example, a ruler that measures the length of an object and consistently returns a value that is close to the actual length of the object is considered accurate.

Precision refers to the degree of reproducibility or consistency of a measurement or data point. Precision is often expressed in terms of the number of significant figures or the uncertainty in a measurement. For example, a ruler that consistently returns a value of 5.00 cm when measuring an object of known length is considered precise, even if the value is not close to the true length of the object.

It is possible to be precise without being accurate, and vice versa. For example, if a ruler consistently returns a value of 4.98 cm when measuring an object of known length, it is considered precise but not accurate. On the other hand, if a ruler returns a value that is close to the true length but varies widely from measurement to measurement, it is considered accurate but not precise. Ideally, measurements or data points should be both accurate and precise.

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The equilibrium temperature of the hot asphalt, (a) 75°C, but this is not an exact match.

To find the equilibrium temperature of the hot asphalt, we can use the Stefan-Boltzmann Law which states that the rate of heat energy emitted per unit area is proportional to the fourth power of the temperature (in Kelvin) and the emissivity constant.
The equation for this is:
P = eσAT⁴
Where P is the power emitted, e is the emissivity, σ is the Stefan-Boltzmann constant, A is the surface area, and T is the temperature in Kelvin.
In this case, we know that the sun delivers 1 000 W to each square meter of the blacktop road, so we can assume that this is the power emitted by the asphalt. Therefore, we have:
P = 1000 W/m²
e = 1 (given)
σ = 5.67 × 10⁻⁸ W/m².K⁴ (given)
We want to find T in Kelvin, so we can rearrange the equation as:
T = (P/eσA)⁰.⁴
Substituting in the values, we get:
T = [(1000 W/m²) / (1 × 5.67 × 10⁻⁸ W/m².K⁴ × 1 m²)]⁰.⁴
T = 333.27 K
Converting Kelvin to Celsius, we get:
T = 60.12°C
Therefore, the closest answer choice is (a) 75°C, but this is not an exact match. It is possible that the given options are rounded, or there may be some other factor that is not accounted for in this calculation.

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Given

On Saturday, she found 4 times as many shells as she found on Sunday.

Saturday = 4*Sunday

Saturday = 21 + Sunday

Two system equations, now we can solve:

4*Sunday = 21 + Sunday

3*Sunday = 21

Sunday = 7 Shells

Saturday = 28 Shells

Total = 35 Shells

Answer:35 in total

Explanation:

Answer:

Explanation:

The vector ( -A) will be directed south, and its modulus is 3 m

If vector A is 3 m north, then vector -A would be in the south direction and its modulus will be 3 m.

Anything that has both a direction and a magnitude is referred to as a vector. It is often represented by an arrow whose length is proportional to the magnitude of the quantity and whose direction is the same as that of the quantity. A vector does not have position while having magnitude and direction.

Vector quantities include things like movement, acceleration, force, momentum, weight, light speed, gravitational field, current, and more. Zero vector, unit vector, position vector, co-planar vector, equal vector, collinear vector, like vector, and unlike vector, are some types of vectors.

If vector A is 3 m north, then vector -A would be in the south direction and its modulus will be 3 m.

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The energy produce by electricity is known as electric energy.

Answer:

Electrical energy is energy derived from electrical potential energy or kinetic energy

Explanation:

when used loosely ,electrical energy refers to energy that has been converted from potential energy.

Answer:

The ball hit with 12N

Explanation:

Just took the quiz and got it right

The eccentricity of Venus is = 0.0068. That is option C.

The orbital eccentricity is defined as the measurement that is used to show how an orbit deviates from the shape of a circle.

The Venus is one of the planets of the universe that is the second closest to the sun.

The Venus is one of the planets that has a small orbital eccentricity being 0.006772 which is approximately 0.0068. This means that it is closest to being circular in shape.

The planets with the largest orbital eccentricity is the planet Mercury with orbital eccentricity of 0.2056.

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The time at which the current has reached -1000 A is approximately 0.0277 seconds in a capacitor .

To find the current function ic(t), we need to differentiate the voltage function with respect to time (t) in capacitor

\(vc(t) = 50e^-50t\)

Differentiating:

\(ic(t) = d(vc(t))/dt\)

\(= d/dt [50e^-50t]= -2500e^-50t\)

Current function ic(t) :

\(ic(t) = -2500e^-50t\)

To find the time at which the current has reached a certain value, we can substitute the desired value for ic(t) in the above equation and solve for t.

For example, if we want to find the time at which the current has reached a value of -1000 A, we can write:

\(-1000 = -2500e^-50t\)

Solving for t :

\(t = ln(2/5) / 50\)

= 0.0277 seconds (approximately)

Therefore, the time at which the current has reached -1000 A is approximately 0.0277 seconds.

It's important to note that the current in this circuit is determined solely by the voltage across the capacitor and the capacitance value. The voltage decreases exponentially over time, which causes the current to also decrease exponentially. This type of circuit is known as an RC circuit and is commonly used in electronic circuits.

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Complete Question:

vc(t) = 50e-50t gives the voltage across a 2 micro farad capacitor. the existing function ic is ok (t). determine the current's current time.

The mechanical energy lost due to friction acting on the runner is 1095.7 J.

What is Energy?

Energy is a fundamental concept in physics that refers to the ability of a system to do work. In simpler terms, energy is the capacity of an object or system to perform work, move, or cause changes in matter.

To account for this, we can use the work-energy principle, which states that the work done on an object is equal to the change in its kinetic energy:

W = ΔK

where W is the work done on the runner by friction and ΔK is the change in the runner's kinetic energy.

The work done on the runner by friction is given by:

W = μkmgd

where μk is the coefficient of kinetic friction (0.693), d is the distance over which the runner slides (assumed to be the same as the distance between the bases, 15.24 m), and the other variables are as defined above.

W = (0.693)(72.9 kg)(9.81 m/\(s^{2}\))(15.24 m)

W = 1095.7 J

The change in the runner's kinetic energy is given by:

ΔK = \((1/2)mvf^{2}\) - \((1/2)mvi^{2}\)

where vf is the final speed of the runner (zero) and vi is the initial speed of the runner (3.93 m/s).

ΔK = (1/2)(72.9 kg)\((0 m/s)^{2}\) - \((1/2)(72.9 kg)(3.93 m/s)^{2}\)

ΔK = -1041.9 J

The negative sign indicates that the runner's kinetic energy has decreased, as expected.

Therefore, the actual mechanical energy lost due to friction is:

ΔE = W = 1095.7 J

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The mass of a ball is 3.5 kg. It moves down a slope that is inclined at 40 degrees with respect to the horizontal. The base of the slope has a length of 4.8 meters.the ball loses 106.2 Joules of gravitational potential energy when it rolls down the slope.

It is required to determine how much gravitational potential energy the ball loses when it rolls down the slope.For this, we need to use the following formula:ΔPE = mghwhere m = mass of the ball = 3.5 kgg = acceleration due to gravity = 9.81 m/s2h = height from which the ball rolls downLet's analyze the situation. The ball moves down a slope. The potential energy (PE) of the ball at the top of the slope is converted into kinetic energy (KE) as it moves down the slope. The ball gains KE, and it loses PE.The height from which the ball rolls down the slope is given by the following expression:h = length of slope × sin θh = 4.8 × sin 40°h = 3.086 metersSubstitute the given values into the formula for ΔPE.ΔPE = mghΔPE = 3.5 × 9.81 × 3.086ΔPE = 106.2 JoulesTherefore, the ball loses 106.2 Joules of gravitational potential energy when it rolls down the slope.

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Answer:

Ethical Guidelines for Research With Human Subjects

Participation Must Be Voluntary.

Researchers Must Obtain Informed Consent.

Researchers Must Maintain Participant Confidentiality

Explanation:

Basta Yun na yan correct me if I'm wrong hehehhe

The statement that describes the mass-energy equivalence is that mass-energy can be created or destroyed. Thus, option B is correct.

The mass-energy equivalence gives the relation between mass and energy in the rest frame. This relation was given by Albert Einstein. Energy and mass are directly proportional to each other. Energy can be converted into mass and the mass of the body is converted into energy. Thus, the mass and energy can either be created or destroyed.

The mass-energy equivalence, E = mc², where E is the energy, m is the mass and c is the speed of light. Thus, the mass-energy equivalence states that mass energy can be created or destroyed.

Thus, the ideal solution is option B.

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Answer:

(5g/cm³)*(10cm³) = 50g

Explanation:

This is just a conversion formula. Easy to find using dimensional analysis.

(5g/cm³)*(10cm³) = 50g

Answer:

\(\boxed {\boxed {\sf 50 \ grams}}\)

Explanation:

Density is the amount of mass per unit volume, so the formula is:

\(d = \frac{m}{v}\)

The density of the substance is 5 grams per cubic centimeter and the volume is 10 cubic centimeters.

Substitute the values into the formula.

\(5 g/cm^3 = \frac{m}{10 \ cm^3}\)

We are solving for the mass, so we have to isolate the variable m. It is being divided by 10 cubic centimeters. The inverse of division is multiplication, so we multiply both sides of the equation by 10 cm³.

\(10 \ cm^3 *5 g/cm^3 = \frac{m}{10 \ cm^3} * 10 \ cm^3\)

\(10 \ cm^3 *5 g/cm^3 = m\)

The units of cubic centimeters (cm³) cancel.

\(10 *5 g = m\)

\(50 \ g=m\)

The mass of the substance is 50 grams.

Answer:

D. If you spend more time in the sun, your skin will become drier.

Explanation:

i mean think about it. also i just took the test and got it right so there u go.

Answer:

A wire carrying a 30.0-A current passes between the poles of a strong magnet that is perpendicular to its field and experiences a 2.16-N force on the 4.00 cm of wire in the field. What is the average field strength?

Explanation:

hope this helps trying to be brainliest

A tank filled with manure, water, and unused crop plant residues, but with minimal oxygen content, can be used for a process known as anaerobic digestion.

Microorganisms, especially methanogenic bacteria, break down the organic matter into simpler compounds such as fatty acids and sugars through a process called hydrolysis.

Now, let's examine the role of oxygen in anaerobic digestion. Therefore, minimizing the oxygen content in the tank is crucial for the success of the anaerobic digestion process.

To ensure that the tank has minimal oxygen content, it is usually sealed to prevent air from entering. Additionally, the contents of the tank are mixed regularly to promote the growth and activity of the methane-producing microorganisms while ensuring that oxygen levels remain low.

A tank filled with manure, water, and unused crop plant residues but with minimal oxygen content can be used for anaerobic digestion, a process that breaks down organic matter into biogas and digestate.

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If pressure has to be decreased the height of the piston needs to be increased which will increase volume of gas eventually decreasing the pressure.

The thrust (perpendicular force on a surface) acting per unit area of a body is referred to as pressure. It can be stated mathematically as follows: Pascal is the SI unit of pressure (Pa). One Pascal is the amount of pressure one Newton of force applies to a square inch of space. Additionally, 1 P a = 1 N / m 2. In the International System of Units, pressure or stress is measured in pascals (Pa) (SI). It bears Blaise Pascal's name, a mathematician and physicist. Applied force of one newton (N) per square metre is equal to one pascal (P) (m2).

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Answer:

The answer to this question is given below in this explanation section.

Explanation:

"electromagnetic spectrum depends on wavelength and frequency"

When electromagnetic radiation interacts with single atoms and molecule,its behavior also depends on the amount of energy per quantum(photon)it carries wave number =1/wavelength in cm speed of light=wavelength x frequency energy = Planck's constant x frequency.

Electromagnetic radiation interacts with matter in different parts of the spectrum.

Electromagnetic radiation interacts with matter in different ways in different parts of the spectrum.The types of interaction can be so different that it seems justified to refer to different types of radiation.There is a continuum containing all these different kind of electromagnetic radiation.Thus we refer to spectrum but divide it up based on the different interaction with matter.

Answer:

Energy increases with decreasing wavelength and increasing frequency.

Explanation:

The resonant frequency for this series RLC circuit is approximately 1.592 kHz. The answer is B) 1.592 kHz.

The resonant frequency for a series RLC circuit can be calculated using the formula f = 1/(2π√(LC)), where f is the resonant frequency, L is the inductance in Henries, and C is the capacitance in farads. In this case, R = 10 Ω, C = 5 μF, and L = 2 mH. We can convert the units of L to henries by dividing by 1000, so L = 0.002 H.

Now we can plug in the values and solve for f:

f = 1/(2π√(0.002 × 5 × 10⁻⁸))

f = 1/(2π√(10⁻⁸))

f = 1/(2π × 10⁻⁴)

f = 1/(2 × 3.14159 × 10⁻⁴)

f = 1/(6.28318 × 10⁻⁴)

f = 1591.55 Hz

Therefore, the resonant frequency for this series RLC circuit is approximately 1.592 kHz. The answer is B) 1.592 kHz.

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A 0.1mm diameter glass tube is inserted into an ethyl alcohol at 20 degrees centigrade in a cup. The angle of alcohol with the tube is 0 degrees. D = 0.1 mm = 0.001m, alcohol angle is 0 degrees, ethyl alcohol

\(η=1.1×10^-3 N⋅sec/ m², s_g\)

=0.79.

We have to determine how much glycerin rises in the tube. The force that moves the liquid through the tube is the difference between the downward force of gravity on the liquid column and the upward capillary force produced by the surface tension of the liquid against the walls of the tube.

The height to which the fluid rises in a capillary tube may be measured by balancing the capillary force against the force of gravity on the column.

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Answer:

B

Explanation:

The pattern that the double slit experiment produces is a diffraction pattern (made as a result of single and double slit interference).

Answer:

B. It is the result of diffraction.

Explanation: a p e x

If the light of wavelength 560 nm strikes such a photocathode, the maximum kinetic energy is 2.21 eV.

To calculate the maximum kinetic energy of the emitted electrons, we can use the equation:
Energy = Planck's constant * speed of light / wavelength
The wavelength is 560 nm, we need to convert it to meters first.
1 nm = 1 * 10⁻⁹ m
So, the wavelength in meters is 560 nm * (1 * 10⁻⁹ m / 1 nm) = 5.6 * 10⁻⁷ m

Now, we can calculate the energy using the equation:
Energy = (6.63 * 10⁻³⁴ J s) * (3 * 10⁸ m/s) / (5.6 * 10⁻⁷ m)
Calculating this, we identify that the energy is approximately 3.54 * 10^(-19) J.
To convert this to electron volts (eV), we use the conversion:
1 eV = 1.6 * 10⁻¹⁹ J
So, the maximum kinetic energy of the emitted electrons is:
3.54 * 10⁻¹⁹ J * (1 eV / 1.6 * 10⁻¹⁹ J) = 2.21 eV

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Answer:

Hypothesis is simply a theory given on something which may be correct or not.

Answer:Deforestation refers to the decrease in forest areas across the world that are lost for other uses such as agricultural croplands, urbanization, or mining activities. Greatly accelerated by human activities since 1960, deforestation has been negatively affecting natural ecosystems, biodiversity, and the climate. The UN’s Food and Agriculture Organization estimates the annual rate of deforestation to be around 1.3 million km2 per decade.

Explanation:

The negative effect of deforestation on the environment is desertification. The correct option is B.

Desertification is the process by which fertile land becomes desert, typically as a result of drought, deforestation, and inappropriate agriculture or land use practices. It occurs when land that was once able to support vegetation and life becomes increasingly dry, barren, and unable to sustain crops, livestock, or human populations. This can be due to natural causes such as prolonged droughts, but it is often exacerbated by human activities such as deforestation, overgrazing, and soil degradation. Desertification can have devastating effects on the environment, leading to soil erosion, loss of biodiversity, and reduced productivity of the land. It can also cause social and economic problems, such as displacement of people, food shortages, and conflicts over resources.

Here in the question,

Deforestation is the clearing of trees and other vegetation from an area, leading to the loss of habitat and biodiversity, and disruption of water cycles. It can also cause soil erosion, which can result in the depletion of soil nutrients, reduced productivity, and eventually lead to desertification. Additionally, deforestation contributes to climate change by releasing carbon dioxide into the atmosphere, which can cause global warming and other environmental problems. Habitat restoration, soil production, and urbanization are not negative effects of deforestation but can be impacted by it.

Therefore, The correct answer is B i. e Desertification.

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