2.
A ray of light passes from air (n = 1.000) into ice (n = 1.314) at an angle of 23.7 to the normal. The
refracted ray of light then passes from ice into glycerine (n = 1.477). What is the angle of refraction of
the ray of light in glycerine? Answer is 15.8°

Answer:

\(P_{h}\)=\(P_{0} e\)\(\frac{-mgh}{kT}\)

Explanation:

A fold is a stack of planar surfaces that are bent during permanent deformation and this happens when the earth's crust is compressed together.

This refers to the planar fracture that occurs in a volume of rock that causes significant displacement.

Hence, we can see that there are three types of fold and they are:

Please note that your question is incomplete so I gave a general overview of the concept to give you a better understanding.

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The mass of water that can be heated each day would be 923.1 kg.

We can use the equation:

Q = mcΔT

where Q is the heat energy supplied to the water, m is the mass of the water, c is the specific heat capacity of water, and ΔT is the change in temperature of the water.

We know the heat energy supplied to the water each day, which is:

Q = 19,000,000 J

We also know the initial and final temperatures of the water, which are:

T1 = 7.0 °C

T2 = 55 °C

The specific heat capacity of water is:

c = 4200 J/kg °C

Substituting these values into the equation above and solving for m gives:

Q = mcΔT

m = Q / (cΔT)

ΔT = T2 - T1 = 55 °C - 7.0 °C = 48 °C

m = 19,000,000 J / (4200 J/kg °C * 48 °C)

m = 923.1 kg

Therefore, the mass of water that can be heated each day is 923.1 kg, rounded to 2 significant figures.

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Answer:1725 watts

Explanation: Household devices are required to run at 110-125 volts and most are rated at 115 volts so 1725 watts for a 15 amp cord or circuit. You will have to be careful when adding outlets for a 15 amp breaker. Always be sure to consult a licensed electrician before DIY electrical work.

Answer:

Explanation:

you got that wrong it is  a 0.4

The speed of the  Toyota Corolla would have  been 143.9 mph.

The acceleration of the F-15 can be calculated as follows:

Acceleration = Velocity Change / Time = (Take-off Speed) / Time

where;

Take-off Speed = √(2dg /t²)

Take-off Speed = √(2 x  (270 ft)  x 32.2 ft/s² / (2 s)²)

T  = √(17496) = 131.6 ft/s

Acceleration = Velocity Change / Time

= (131.6 ft/s) / (2 s) = 65.8 ft/s²

We can use the same acceleration to launch the Toyota Corolla, and calculate its final velocity:

Final Velocity = Initial Velocity + Acceleration x Time

where;

Final Velocity = 0 + (65.8 ft/s²) * (2 s) = 131.6 ft/s

Finally, we can convert the velocity from feet per second to miles per hour:

Velocity (mph) = Velocity (ft/s) x (1 hour/3600 s) x (5280 ft/mile)

= 131.6 ft/s x  (1 hour/3600 s)  x (5280 ft/mile)

= 143.9 mph

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Answer:

I believe it's True!    Brainliest??

Explanation: Hope you have a great day :)

When an emf of 0.40 V is induced across a coil when the current through it changes uniformly from 0.10 to 0.60 A in 0.30 s.then the self-inductance of the coil would be 0.24096 H

An electrical conductor's propensity to resist a change in the flow of current through it is known as inductance. A magnetic field is produced around a conductor by an electric current flowing through it. The magnitude of the current determines the field strength, which follows any changes in current.

According to Faraday's law of induction, electromagnetic induction is the process by which a change in the magnetic field flowing through a circuit induces an electromotive force (EMF) (voltage) in the conductors.

e= -L dI/dt

Where I=current flows through the coil,e is the emf and L is the self-inductance of the coil

By substituting the respective values in the formula

0.40 V = L × (0.60 -0.10)/0.30

L = 0.24096 H

Thus, The coil's self-inductance would be 0.24096 H if an emf of 0.40 V were induced across it when the current through it changed uniformly from 0.10 to 0.60 A in 0.30 s.

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Answer:

Option A. a

Explanation:

Motion variables include:

1. Final velocity (vf).

2. Initial velocity (vi).

3. Time (t).

4. Acceleration (a)

5. Distance (x)

Considering the equation given in the question:

Δx = ½(vf + vi) t

We can see that the acceleration (a) is missing in the equation.

In free-fall motion the velocity is given by the following equation of motion:

Where:

Therefore, the velocity increases linearly with time. This happens if the object encounters no air resistance. In the case that there is air resistance the object will reach a terminal velocity.

In the case of distance, this is given by the following equation:

This means that the distance increases with time following a parabolic function.

To calculate the volume of the hollow cylindrical copper pipe, we need to subtract the volume of the inner cylinder (hole) from the volume of the outer cylinder.

Let's denote:

- L as the length of the pipe (L = 1.40 m).

- D_out as the outside diameter of the pipe (D_out = 3.90 cm).

- D_in as the inside diameter of the pipe (D_in = 2.30 cm).

First, we need to convert the diameters to radii by dividing them by 2:

- r_out = D_out / 2 = 3.90 cm / 2 = 1.95 cm = 0.0195 m.

- r_in = D_in / 2 = 2.30 cm / 2 = 1.15 cm = 0.0115 m.

Next, we can calculate the volume of the outer cylinder (V_out) and the volume of the inner cylinder (V_in).

The volume of a cylinder can be calculated using the formula:

V = π * r^2 * h,

where π is a constant (approximately 3.14159), r is the radius, and h is the height.

Volume of the outer cylinder (V_out):

V_out = π * r_out^2 * L.

Volume of the inner cylinder (V_in):

V_in = π * r_in^2 * L.

Finally, we can calculate the volume of the hollow cylindrical pipe by subtracting the inner cylinder's volume from the outer cylinder's volume:

V_pipe = V_out - V_in.

Substituting the given values, we can calculate the volume of the hollow cylindrical copper pipe.

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The magnitude of the electric field at the position of the third particle is 2.52 x 10⁶ N/C, causing it to remain stationary.

Assuming the third particle has a charge of 0, we can use Coulomb's law to find the magnitude of the electric field at the third particle's position due to the other two charges:

E = k * (q1 / r1² + q2 / r2²)

where k is the Coulomb constant, q1 and q2 are the charges of the first two particles, and r1 and r2 are the distances from the third particle to the first two particles.

Since the triangle is equilateral, the distances from the third particle to the first two particles are both 2.0 cm. Plugging in the values:

E = (8.99 x 10⁻⁹ N*m²/C²) * (4.5 x 10⁻⁹ C / (0.02 m)² + 9.0 x 10⁻⁹ C / (0.02 m)²)

E = 2.52 x 10⁶ N/C

So the magnitude of the electric field at the third particle's position is 2.52 x 10⁶ N/C. Since the third particle has a charge of 0, there is no force on it and it will remain stationary.

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The answer to the question is:

77.0 dB

When the distance from a point source of sound is doubled, the intensity level decreases by 6 dB. This decrease in intensity level with increasing distance is due to the spreading of sound waves over a larger area. According to the inverse square law, the intensity of sound is inversely proportional to the square of the distance from the source.

In this case, the distance is doubled from 2.00 m to 4.00 m. Since the distance is doubled, the intensity level will decrease by 6 dB. Therefore, we subtract 6 dB from the initial intensity level of 80.0 dB.

80.0 dB - 6 dB = 74.0 dB

So, the intensity level at a distance of 4.00 m from the source will be 74.0 dB.

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Take the upward and to-the-right directions to be positive (so down and to-the-left are negative).

The vertical forces acting on the object cancel, 6 N - 6 N = 0.

The horizontal forces exert a net force of 20 N - 3 N = 17 N. This net force is positive, so it points to the right. So the answer is A.

The answer is A) measurement by thermometer. The practice of gathering data about the environment at a distance, usually through satellites or aircraft, is known as remote sensing.

It involves using a range of sensors to gather information about an object or an area without actually touching it, such as photos, sounds, or other measures.

Several industries, such as agriculture, urban planning, crisis management, and resource management, use remote sensing. Aerial photography, LiDAR, radar, thermal infrared imaging, multispectral imaging, and hyperspectral imaging are some of the most frequently utilised remote sensing technologies today.

Researchers and scientists can examine vast portions of the Earth's surface using remote sensing equipment and learn important things about patterns and trends over time, such as changes in land cover, vegetation growth, and ocean temperature.

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The heating curve could be describing processes such as boiling and endothermic reactions.A heating curve is a graphical representation that shows the changes in temperature as a substance is heated.

It typically consists of two distinct segments: heating and phase change. Boiling is a process where a substance changes from its liquid phase to its gaseous phase. During the heating phase, the temperature of the substance gradually increases until it reaches its boiling point. At this point, the substance undergoes a phase change, and the temperature remains constant until all the liquid has vaporized. Therefore, the heating curve could be describing the process of boiling.

Endothermic reactions are chemical reactions that absorb heat from their surroundings, resulting in a decrease in temperature. If the heating curve represents the temperature changes during an endothermic reaction, we would observe a decrease or plateau in temperature during the reaction, followed by a subsequent increase. Thus, the heating curve could also be describing an endothermic reaction.

Condensation, on the other hand, is the process by which a substance changes from its gaseous phase to its liquid phase. It typically occurs when a gas is cooled down, and the temperature decreases. However, the heating curve represents temperature changes during the heating process, not cooling. Therefore, condensation is not applicable to the heating curve.

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The period of rotation of the cow in the diagram is 1.85 seconds

First, we shall determine the length. Details below:

L² = 75² + 40²

L² = 5625 + 1600

L² = 7225

Take the square root of both sides

L = √7225

L = 85 cm

Finally, we shall obtain the period of rotation. Details below:

T = 2π√(L/g)

T = (2 × 3.14) × √(0.85 / 9.8)

T = 6.28 × √(0.85 / 9.8)

T = 1.85 seconds

Thus, we can conclude from the above calculation that the period of rotation is 1.85 seconds

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Answer: the period of rotation is 1.85 seconds

Explanation: the other guy is right

It just starts to move. The coefficient of static friction between the block and the floor is approximately 0.151.

N = (8.10 kg) (9.81 m/s^2) = 79.4 N

Now we can substitute these values into the formula for static friction:

f_s = μ_s N

12.0 N = μ_s (79.4 N)

Solving for μ_s, we get:

μ_s = 12.0 N / 79.4 N

μ_s = 0.151

Static friction is a force that arises between two surfaces that are in contact with each other but not in motion relative to each other. When an external force is applied to an object that is at rest, static friction opposes the force and prevents the object from moving.

This type of friction is the reason why you need to push a heavy object harder and harder until it starts moving. Once the object starts moving, the force required to keep it moving is reduced, and dynamic or kinetic friction takes over. The magnitude of the static friction force depends on the nature of the surfaces in contact, the normal force pressing the surfaces together, and the coefficient of static friction.

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(a) Take into account that the centrifugal force experienced by each car is given by:

where v1 and v2 are the speed of both cars and R1 and R2 are the radius of the curve traveled by each car, m is the mass of the cars.

If you solve for m, you obtain:

due to the masses of the cars are identical, you have:

(b) Now, consider that:

R1 = 2R

v1 = v

R2 = 6R

v2 = 3v

Now, divide the equation for F1 over the equation for F2, replace the previous expressions for the parameters and simplify for F1:

The equation that best summarizes the internal energy (U) of a substance that has both kinetic and potential energy is

U = Σ(KEn) + Σ(PEn).

A substance's internal energy is the sum of the kinetic and potential energies of all of its constituent particles.

This inquiry asks if a substance's particles can contain both kinetic energy (KE) and potential energy (PE).

This means that the internal energy is the sum of the kinetic energy and potential energy of all the particles in the substance.

Therefore, equation that best summarizes the internal energy (U) of a substance that has both kinetic and potential energy is U = Σ(KEn) + Σ(PEn).

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Answer:

the velocity is 1.67 m/s

Explanation:

The computation of the velocity of the arrow/ice combination after the collison is shown below:

Here the law of conservation is applied

\(p_i = p_f\\\\m_av_a+m_b+v_b= (m_a + m_b)v\)

Here

\(m_a = 2.0 kg\\\\v_a = 10m/s\\\\m_b = 10 kg\\\\v_b = 0\)

Now

\(v = \frac{m_av_a+ m_bv_b}{m_a + m_b} \\\\= \frac{(2.0kg) (10 m/s) + 0}{2.0kg + 10.0kg}\)

= 1.67 m/s

hence, the velocity is 1.67 m/s

Answer: is will be 78.5%

Explanation:

Answer:

78.5%

Explanation:

correct on edge 2020 :)

Answer:

600J

Explanation:

w=f×s

=120×5

600J

therefore the work by a force applied to a box that moves 5m is 600J

Answer:

I should be active for 15 hours to meet the physical activity requirement.

Explanation:

Since time dilates in moving objects, we use the formula t = t₀/√(1 - β²) where t = time in space vehicle, t₀ = time on earth = 9 hours and β = v/c where v = speed of space vehicle = 0.8c.

So, t = t₀/√(1 - β²)

t = 9/√(1 - (v/c)²)

= 9/√(1 - (0.8c/c)²)

= 9/√(1 - (0.8)²)

= 9/√(1 - (0.64)

= 9/√0.36

= 9/0.6

= 15 hr

So, according to a timer on the space vehicle, I should be active for 15 hours to meet the physical activity requirement.

Question: calculate their densties in Si unit.

200mg,0.0004m​³

Answer:

0.5 kg/m³

Explanation:

Applying,

D = m/V........................ Equation 1

Where D = density, m = mass, V = volume.

From the question,

Given: m = 200 mg = (200/1000000) kg = 2.0×10⁻⁴ kg, V = 0.0004 m³ = 4.0×10⁻⁴ m³

Substitute these values into equation 1

D = (2.0×10⁻⁴ kg)/(4.0×10⁻⁴)

D = 2/4

D = 0.5 kg/m³

Hence the density in S.I unit is 0.5 kg/m³

The claim can be Cosmetics, hygiene, and cleaning product emissions may be dangerous.

Evidence 1: Effect of Air Quality

Volatile organic compounds (VOCs), including formaldehyde, benzene, and toluene, can be found in a variety of cosmetic, hygiene, and cleaning goods. These VOCs have the potential to evaportate and cause indoor air pollution.

Environmental impact is evidence number two

Cosmetics, hygiene, and cleaning goods can have a detrimental environmental impact during manufacturing, usage, and disposal. Microplastics and certain chemicals are among the substances present in these items that may find their way into rivers and endanger aquatic life.

Evidence 3: Worker health effects

Occupational health risks can be present for workers who manufacture and produce hygiene, cleaning, and cosmetic items.

Reasoning: It is clear from the research that emissions from cosmetic, hygiene, and cleaning goods have the potential to be harmful.

Thus, this way, harmful are the emissions from cosmetics, hygiene, and cleaning products.

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Answer: divide the output force by the input force

Explanation: your welcome

The mechanical advantage which a simple machine provides can be calculated by dividing the output displacement by the input displacement. Thus, the correct option is B.

The mechanical advantage of a simple machine can be defined as the ratio of output force applied on the object to input force. Mechanical advantage is also the ratio of load overcame by a simple machine to the effort which is applied by that machine. The formula for mechanical advantage of a simple machine is given as:

M.A. = output force / input force

M.A. = Load / effort

Thus, the mechanical advantage of a simple machine depends both on the output force of the simple machine and the input force of the machine.

Therefore, the correct option is B.

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Given:

The height from which feather is dropped is h=1.4 m.

The acceleration due to gravity on moon is g=1.67 m/s^2.

The vertical distance covered by the feather is given as,

Substitute the known values,

Thus, the time taken by feather to fall on moon is 1.29 s.