29. Consider the following forces.(1) frictional (2) gravitational (3) tension (4) strong nuclear (5) normal (6) electroweakWhich of the forces listed are considered fundamental forces?A) 1, 2, and 4B) 1, 2, 3, and 5C) 1, 3, and 5D) 2, 4, and 6E) 2, 3, 4, and 6

Traveling through glass (or water) is not good enough to prevent light from escaping but the use  of a thick solid can be ale to prevent the escape.

Glass and water are said to be thicker and heavier when compared to air. They are known to be very well  denser than air.

Note that the thing that occur is that light slows down if it passes from the a medium that is less dense air into the denser glass or water. This depicts the the ray of light and also makes the ray of light to alter its direction.

Therefore, Traveling through glass (or water) is not good enough to prevent light from escaping but the use  of a thick solid can be ale to prevent the escape.

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Answer:

0.4 m/s2

Explanation:

mass: 25kg

net force: 10 N

acceleration: ?

net force ÷ by mass= acceleration

10 N ÷ 25 Kg = 0.4 m/s2

The electric force acting on a 7.80 nc charge that is located 1.69 m from a 4.54 nc point charge is: 1.115*10^-7 N

To solve this exercise the electric force formula and the procedure we will use is:

F = (k * q1 * q2)/r²

Where:

Information about the problem:

By converting the the values of the charges (q1) and (q2) from (nC) to (C) and we have that:

q1= 7.80 nC * 1 C/ 1*10^ 9 nC

q1= 7.8*10^ -9 C

q2= 4.54 nC * 1 C/ 1*10^ 9 nC

q2= 4.54 *10^ -9 C

We apply the electric force formula we have:

F = (k * q1 * q2)/r²

F = [(9 *10^9 N*m²/C² * (7.8*10^ -9 C) * (4.54 *10^ -9 C)]/ (1.69 m)²

F = 3.187*10^-7 N*m² /2.8561 m²

F = 1.115*10^-7 N

In physics the electric force is the force that attracts or repels two charges (q) separated at a distance called (r), this is expressed in the international system of units in Newton.

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Answer:

The heat necessary to warm 500g of water from 20°C to 65°C is 37,620 J.

Explanation:

GIVEN: m = 500 gm, T₂ = 65°C AND T₁  = 20°C, we know that c (specific heat capacity) = 4180

TO FIND: The heat necessary to warm 500g of water from 20°C to 65°C.

SOLUTION:

By using the heat equation,

              Q=m c ΔT  

             ΔT = T₂ - T1

             ΔT = 65 - 20 = 45°C

In this case,

Q = 0.2 × 4180 × 45 = 37,620 J

The acceleration of julie and susie is a = 1.250 x 10³m/s².

Given in the question,

F = 20,000N

mass = 16kg

acceleration = ?

Using formula,

Force = mass x acceleration

20000 N = 16 kg x a

a = F / m

a = 20000 / 16

a = 1.250 x 10³m/s²

A change that can alter an object's motion is known as a force. A mass-containing object's velocity can change, or accelerate, as a result of a force. Intuitively, a push and / or a pull can also be used to describe force. Being a vector quantity, a force has both magnitude and direction. Two main categories into which forces can be divided are Contact Forces and Non-Contact Forces.

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The mass of ice that was added is 1.11 kg. So the answer is 1.1 kg (option O 1.1 kg).

To solve this problem, we can use the principle of energy conservation. The heat gained by the ice will be equal to the heat lost by the water.

The heat gained by the ice can be calculated using the formula:

Q_ice = m_ice * c_ice * ΔT_ice

Where:

Q_ice = heat gained by the ice

m_ice = mass of ice added

c_ice = specific heat capacity of ice (2100 J/(kg-K))

ΔT_ice = change in temperature of the ice (from -15°C to 0°C)

The heat lost by the water can be calculated using the formula:

Q_water = m_water * L_water

Where:

Q_water = heat lost by the water

m_water = mass of water in the cooler

L_water = latent heat of fusion of water (334 x 10^3 J/kg)

Since there is no heat exchange with the surroundings, the heat gained by the ice is equal to the heat lost by the water:

Q_ice = Q_water

m_ice * c_ice * ΔT_ice = m_water * L_water

Substituting the known values:

m_ice * 2100 * (0 - (-15)) = 1.75 * 334 * 10^3

Simplifying the equation:

m_ice * 2100 * 15 = 1.75 * 334 * 10^3

m_ice = (1.75 * 334 * 10^3) / (2100 * 15)

m_ice ≈ 1.11 kg

Therefore, the mass of ice that was added is approximately 1.11 kg. So the answer is 1.1 kg (option O 1.1 kg).

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The roof area that should be covered to supply 9 A at 120 V is approximately 2.844 m².

To calculate the required roof area, we can start by determining the power (P) needed to supply 9 A at 120 V.

Using the formula P = IV, where I is the current and V is the voltage, we find that P = 9 A × 120 V = 1080 W.

Next, we can calculate the solar panel's power output considering its efficiency. If the solar irradiance is 700 W/m² and the panel is 40% efficient, the power output per square meter of the panel will be 0.4 × 700 W/m² = 280 W/m².

To determine the required roof area, we can divide the required power (1080 W) by the power output per square meter (280 W/m²): 1080 W / 280 W/m² ≈ 3.857 m².

However, this value represents the total area required. Since solar panels are typically rectangular, we need to consider the shape and dimensions of the panels. Assuming a square panel, the roof area that should be covered is approximately the square root of the total area: √3.857 m² ≈ 1.964 m.

Rounding to three decimal places, the roof area that should be covered is approximately 2.844 m².

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Answer:

Revolutions made before attaining angular velocity of 30 rad/s:

θ = 3.92 revolutions

Explanation:

Given that:

L(final) = 10.7 kgm²/s

L(initial) = 0

time = 8s

Torque is the rate of change of angular momentum:

\(T = \frac{L(final)-L(initial)}{t}\\T = \frac{10.7-0}{8}\\T=1.34 Nm\)

We know that

T = Iα

α = T/I

where I = moment of inertia = 2.2kgm²

α = 1.34/2.2

α = 0.61 rad/s²

We know that angular equation of motion is:

ω²(final) = ω²(initial) +2αθ

(30 rad/s)² = 0 + 2(0.61 rad/s²)θ

θ = (30 rad/s)²/ 2(0.61 rad/s²)

θ = 24.6 radians

Convert it into revolutions:

θ = 24.6/ 2π

θ = 3.92 revolutions

Answer:

D

Explanation:

To represent objects, processes, and systems that are too large, too small, or too complex to study directly

The correct option is (d) To represent objects, processes, and systems that are too large, too small, or too complex to study directly.

The 4 types of scientific models -

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The formula is VD = (2 x L x R x I) / 1000 where VD is  voltage drop L is the length of the conductor  R is the resistance of the conductor and I is the current flowing through the conductor.

To find the voltage drop of the conductors to and from the load, you can use the following formula:

VD = (2 x L x R x I) / 1000

where VD is the voltage drop in volts, L is the length of the conductor in feet, R is the resistance of the conductor in ohms per 1000 feet, and I is the current flowing through the conductor in amperes.

This formula assumes that the conductors are made of copper and have a temperature of 75°F. If the conductors are made of a different material or have a different temperature, the resistance value should be adjusted accordingly.

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Given

Time taken is t=8 s.

The initial speed is u=7 m/s

The final speed is v=9 m/s.

To find

The acceleration

Explanation

We know the acceleration is the ratio of the difference in the speed to the time taken.

Thus,

Conclusion

The acceleration is

Answer:

B

Explanation:

The object won't stay in the same place if its moving

Explanation:

B) Measure it's change in position.

The ball's height from the ground is 2.85 feet

V = 0

u= 56 feet/ second

h =?

h =\(\frac{u^2}{2g}\) = \(\frac{56}{2*9.8}\) = 2.85 feet

The concept of motion under gravity

When an object moves, it is said to be in motion under gravity since gravity has an impact on the object’s vertical motion.

GRAVITY is the force that pulls things downward. In actuality, gravity pulls objects toward the Earth’s center.

Consequently, v=gt is the equation of motion.

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The correct prescription for the eyeglasses that would serve the same purpose as the contact lenses is +2.40 diopters.

When wearing the contact lenses with a refractive power of 1.90 diopters, the man is able to read books held no closer than 0.265 m from his eyes. To find the prescription for the eyeglasses, we need to calculate the additional refractive power required to achieve the same focusing ability at a different distance. Using the lens formula

1/f = 1/v - 1/u,

where f is the focal length, v is the image distance, and u is the object distance, we can calculate the focal length of the contact lenses.

Since the person can read books held no closer than 0.265 m, the object distance (u) would be 0.265 m. The image distance (v) would be the distance from the contact lenses to the eyes, which is 0.020 m. The calculated prescription for the eyeglasses is +2.40 diopters, which means that eyeglasses with a refractive power of +2.40 diopters would enable the man to read books held at a distance of 0.020 m.

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concept employed

The quantity of complete waveforms produced per second is the frequency (f) of a wave. This is the same as the number of oscillations or cycles per second.

The duration of a waveform, or the duration of an oscillation, is measured in seconds (T). It is obvious that frequency and duration are inverses.

We know that = 1/T 2/1

= T1/T2

= (1/10T)1 0

= 1/ 10 means that the frequency is 1/ 10.

Oscillation is the process by which any quantity or measure fluctuates repeatedly about its equilibrium value over time. Another definition of oscillation is a periodic variation in a substance's value between two values or around its core value.

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The calculated average n2 does not agree with the given index of refraction, indicating a potential discrepancy that may be attributed to experimental limitations or errors.

To analyze the agreement between the values for the index of refraction (n2) of glass in each trial, we can observe the trend and variation in the data. From the table, it appears that the values for n2 increase as the angles θ1 and θ2 increase. However, it is difficult to determine the level of agreement between the values without further statistical analysis or calculation of uncertainties.

The conclusion regarding whether the index of refraction is constant for a given medium depends on the level of agreement observed. If the values for n2 in each trial are close to each other and do not deviate significantly, it suggests good agreement and supports the hypothesis of a constant index of refraction.

On the other hand, if there is significant variation and inconsistency among the values, it indicates that the index of refraction may not be constant for the given medium.

To determine the average value of n2 from the provided results, we can calculate the mean of the n2 values:

Average n2 = (1.46 + 1.61 + 1.73 + 1.96 + 2.08 + 2.13) / 6 ≈ 1.85

Comparing the calculated average n2 (1.85) with the given index of refraction of the glass (1.50), we can see that they do not agree. The calculated average n2 is higher than the given value of 1.50. This suggests that there might be some systematic error or uncertainties in the measurements or calculations.

The difference between the calculated and given values could be due to factors such as experimental errors, instrumental limitations, or other sources of uncertainty in the measurement process.

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Complete question is:

Calculate sinθ1, sinθ2 and n2 for each of your results and add them to table 1. Keep your results to 2 or 3 significant figures.

Compare the values for index of refraction of glass for each trial (values in last column). Is there good agreement between them? Would you conclude that index of refraction is a constant for a given medium?

Determine the average value of n2 from your results.

Compare your calculated n2 with the given index of refraction of the glass (1.50). Do they agree? Explain why it does or doesn’t.

Answer: 268.80 W/m^2

Explanation:

Intensity = Power/Area

first convert radius to meters

1.5mm= 1.5x10^-3m

area= pi (1.5x10^-3)^2

= 7.069m^2

convert power to W

1.9mW= 1.9x10^-3W

plug into intensity formula

(1.9x10^-3)/(7.069) = 268.80 W/m^2

The three product which can be potentially fail considering Load Strength graph and precautionary measure to prevent failure are as below;

Ball Pen:

1. Ink Leakage: One potential failure of a ball pen is ink leakage. This can occur due to poor sealing between the ink reservoir and the ballpoint mechanism. Ink leakage can result in messy hands, stained documents, and reduced functionality of the pen. To prevent this failure, manufacturers can improve the quality control process to ensure proper sealing and use high-quality materials for the pen's components.

2. Ballpoint Jamming: Another failure is ballpoint jamming, where the ball gets stuck and prevents smooth writing. This can be caused by a buildup of dried ink or debris inside the pen's mechanism. To prevent ballpoint jamming, regular cleaning and maintenance of the pen can be recommended. Additionally, manufacturers can design the pen with features that facilitate easy cleaning or provide instructions on how to clear any blockages.

3. Weak Barrel Construction: The barrel of the pen may also be prone to failure if it is weak or brittle. Excessive pressure or rough handling can lead to cracks or breakage, rendering the pen unusable. To prevent this, manufacturers can use durable materials for the pen barrel, such as sturdy plastics or reinforced metal, and perform quality checks to ensure structural integrity.

Room Key:

1. Keycard Malfunction: A potential failure of a room key is a malfunction in its electronic components. This can result in the keycard being unreadable by the door lock system, preventing access to the room. To prevent this failure, regular maintenance and replacement of keycard readers can be implemented. Additionally, guests should be advised to keep their keycards away from magnets and electronic devices that can interfere with the card's functionality.

2. Magnetic Strip Damage: Another failure can occur if the magnetic strip on the keycard gets damaged or demagnetized. This can happen due to exposure to magnetic fields or physical damage. To prevent this failure, keycards can be made more durable with protective coatings or alternative technologies such as RFID. Guests should also be educated on proper handling and storage of keycards to avoid damage.

3. Battery Drain: Some room keys use batteries to power their electronic components. A failure can occur if the battery drains, leading to an inactive keycard. To prevent this, low-power consumption designs can be implemented, and regular battery checks or replacements can be carried out by hotel staff. Guests should be informed about the importance of returning the keycard to the front desk for recycling or proper disposal to ensure the battery is replaced as needed.

Blender:

1. Motor Burnout: One potential failure of a blender is motor burnout due to prolonged use or overloading. Continuous operation at high speeds or attempting to blend hard or frozen ingredients beyond the blender's capacity can cause the motor to overheat and fail. To prevent motor burnout, manufacturers can provide clear guidelines on the maximum load capacity and recommended usage durations. Automatic thermal protection mechanisms can also be incorporated to shut off the blender if it detects excessive heat.

2. Blade Jamming: Another failure can occur if food particles or ingredients get jammed between the blender's blades, preventing them from spinning freely. This can happen if the blender is not properly cleaned or if ingredients are not adequately prepared before blending. To prevent blade jamming, users should be advised to clean the blender thoroughly after each use and ensure that ingredients are cut into manageable sizes. Manufacturers can also design blades with accessible mechanisms for easy cleaning or provide cleaning tools.

3. Leakage: A failure in a blender can also manifest as leakage. This can happen if the blender jar or its sealing components are damaged or improperly assembled. Liquid or food can leak out during blending, resulting in a messy and potentially unsafe situation. To prevent leakage, manufacturers should ensure proper sealing mechanisms and use high-quality materials for the blender jar and lid. Regular inspection of the sealing components can be advised,

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Answer:

Finley, Xander and Max

Explanation:

v = Final velocity

t = Time

u = Initial velocity = 0

a = Acceleration

From kinematic equations we get

\(v=u+at\\\Rightarrow a=\dfrac{v-u}{t}=\dfrac{v-0}{t}\\\Rightarrow a=\dfrac{v}{t}\)

Xander

v = 4.5 m/s, t = 3.5 s

\(a=\dfrac{4.5}{3.5}\\\Rightarrow a=1.29\ \text{m/s}^2\)

Finley

v = 3.6 m/s, t = 4.2 s

\(a=\dfrac{3.6}{4.2}\\\Rightarrow a=0.86\ \text{m/s}^2\)

Max

v = 7.3 m/s, t = 1.2 s

\(a=\dfrac{7.3}{1.2}\\\Rightarrow a=6.083\ \text{m/s}^2\)

The required list is Finley, Xander and Max.

Answer:

Finley, Xander and Max

Explanation:

Answer:

Density= 2.78 g/cm³

Relative density=2.8

Explanation:

To calculate the density of the cube we have to use the formula ρ=mass/volume

ρ stands for density.

So now we don't have the volume of the cube and to find the volume of the cube we have to use the formula a³

3³= 9 cm³

Now plug in the values. ρ= 25 g/9 cm³

ρ= 2.78 g/cm³

To find the relative density, we have to use the formula ρsample/ρH20

The sample means the density of the substance earlier. We do not know the density of water but it is constant at 997 kg/m³.

Now we have to make the units same so you change the unit of the density of cube to kg/m³

So, 25/1000= 0.025 kg

9/100×100×100 (because cm³ which means that there should be 3 meters to change the unit and to conver cm to meter we need to divide by 100 so 9cm/100, 9cm²/100×100, 9cm³/100×100×100)

=0.000009 m³

The new density= 0.025 kg/ 0.000009 m³

= 2777.78 kg/m³

Now plug the values into the formula:

relative density= 2.777.78 kg/m³ / 997 kg/m³

=2.8

There is no unit since kg/m³ and kg/m³ cancels

The magnitude of the displacement of the object after it travelled for seven seconds is 28 m (Option A).

The displacement of an object is the change in the position of the object.

Velocity = displacement / time

How to determine the displacement from the velocity - time graph;

From the question given above, the following data were obtained:

Time = 7 s

Velocity = 4 m/s

Displacement =?

Velocity = displacement / time

4 = displacement / 7

Cross multiply

Displacement = 4 × 7

Displacement = 28 m

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Answer: The correct answer is 912 A

Answer:

The formula for force according to Newton's second law of motion is F=ma or force for an object to move is equal to mass times acceleration.

Acceleration or average acceleration defined as change in velocity per time.

F=ma

F=1.2x10³kg*(20m/s)(1/5s)=4.8x10³  Newtons

Explanation:

fthat's not the answer then i'm sorry

Answer:

watts

Explanation:

Answer:

its a.) watts

Explanation:

Answer:

The Western Hemisphere contained significantly higher amounts of shock-fractured quartz. This led Walter and Luis Alvarez to hypothesize that the asteroid impact site was in the Western Hemisphere.

Explanation:

Irina of mass 110 kg floats in fresh water, the volume is 0.06m³.

The buoyant force is the upward force exerted on any object by the fluid. If the buoyant force is lesser than the object's weight, the object will sink while if buoyant force is greater than the object's weight it will float.

In the question irina of mass 110 kg floats in fresh water that indicates:

weight of irina = buoyant force

mg = Vρg

m =  Vρ

Where, m = mass of irina

V = volume

ρ = density of water

110 = V × 1000

V = \(\frac{110}{1000}\)

V = 0.11m³

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Answer:

hello your question is incomplete below is the missing part of the  complete question

which statement best describes Jean-Baptiste Fourier’s influence on Jean-François Champollion? Fourier shared his research about mathematics with Champollion, which aided him in his research. Fourier was the first to introduce Champollion to the hieroglyphs on the Rosetta Stone, which fascinated him. Fourier shared his findings about the Rosetta Stone with Champollion, which helped him in his research. Fourier was the first to introduce Champollion to a variety of languages, which prompted his love of languages.

answer :  Fourier was the first to introduce Champollion to a variety of languages, which prompted his love of languages.

Explanation:

Jean-Baptiste Fourier's influence on Jean-Francois Champollion is that Fourier was the first to introduce Champollion to a variety of languages, which prompted his love of languages. also Fourier was a mathematician  who pleaded on the behalf of Champollion when he was about to be adopted into the military.

Answer:

You can do the reverse unit conversion from cm/s to m/s, or enter any two units below: Metre per second (U.S. spelling: meter per second) is an SI derived unit of both speed (scalar) and velocity (vector quantity which specifies both magnitude and a specific direction), defined by distance in metres divided by time in seconds.

Explanation: