what is the minimum number of rays needed to locate its image point? explain. match the words in the left column to the appropriate blanks in the sentences on the right.

1a) The total energy stored when all three weights are raised by 70 cm is 80.5 J.

1b) The height of the tank is 2 m.

2b) The potential energy is converted into kinetic energy when the water flows out of the taps 6.32 m/s.

3a) The mass of water that goes over the falls every second is 1 x 10⁶ kg.

3b) The gravitational potential energy of 1 kg of water at the top of the falls 1000 J.

3c) The speed of the water as it reaches the bottom if all the GPE stored in 1 kg of water is transferred to kinetic energy is 44.72 m/s.

3d) The water will not be falling as fast as the speed calculated in part c suggests because of the presence of air resistance and the fact that the water falls through a medium (air) which offers resistance to its motion.

3e) The energy transferred when the GPE stored in the water falling in one second is transferred to other energy stores is finally stored in thermal energy stores due to the heat generated by the water as it hits the bottom.

1a) To calculate the amount of energy stored in the three weights, we use the formula given below:

E = mgh

Where,E = Energy (Joules)

m = Mass (kg)

g = Gravity (10 N/kg)

h = Height (m)

For the 4.5 kg weight:

E = 4.5 x 10 x 0.7 = 31.5 J

For each of the 3.5 kg weight:

E = 3.5 x 10 x 0.7 = 24.5 J

Thus, the total energy stored when all three weights are raised by 70 cm is:

31.5 J + 24.5 J + 24.5 J = 80.5 J

1b) To calculate how far the 4.5 kg weight must be lifted to store 45 J of energy, we use the formula:

E = mghh = E/mg = 45 / (4.5 x 10) = 1 m2a)

To calculate the gravitational potential energy stored in the water in the tank when it is full, we use the formula given below:

E = mgh

Where,E = Energy (Joules)

m = Mass (kg)

g = Gravity (10 N/kg)

h = Height (m)

The mass of 1 litre of water is 1 kg and the tank can hold 200 litres of water. Therefore, the total mass of water in the tank is:

Mass = 200 kg

The height of the tank is 2 m.

Therefore, the gravitational potential energy stored in the water in the tank is:

E = mgh = 200 x 10 x 2 = 4000 J

Assumptions made in the answer:

We have assumed that the tank is full.

2b) To calculate the speed at which the water would come out of the bathroom and kitchen taps, we use the formula given below:

PE = KEPE = mghKE = 1/2mv²

Where,PE = Potential Energy (Joules)

KE = Kinetic Energy (Joules)

m = Mass (kg)

g = Gravity (10 N/kg)

h = Height (m)

v = Velocity (m/s)

Assuming that the potential energy of the water in the tank is converted into kinetic energy when the water flows out of the taps, the potential energy stored in the water in the tank is given by:

PE = mgh = 200 x 10 x 2 = 4000 J

The potential energy is converted into kinetic energy when the water flows out of the taps.

Therefore, KE = 1/2mv²v² = 2KE/mv² = 2(4000)/200 = 40 m²/s²v = √(40) = 6.32 m/s (speed of the water coming out of the taps)

3a) To calculate the mass of water that goes over the falls every second, we use the formula given below:

Mass = Volume x Density

Where,Volume = 1000 m³/s, Density = 1000 kg/m³, Mass = 1000 x 1000 = 1000000 kg = 1 x 10⁶ kg

3b) To calculate the gravitational potential energy of 1 kg of water at the top of the falls, we use the formula:

E = mgh

Where,m = 1 kg, g = 10 N/kg, h = 100 m, E = 1 x 10 x 100 = 1000 J

3c) To calculate the speed of the water as it reaches the bottom if all the GPE stored in 1 kg of water is transferred to kinetic energy, we use the formula given below:

PE = KEP

E = mgh

KE = 1/2mv²

Where,PE = Potential Energy (Joules)

KE = Kinetic Energy (Joules)

m = Mass (kg)

g = Gravity (10 N/kg)

h = Height (m)

v = Velocity (m/s)

Assuming that all the potential energy is converted into kinetic energy when the water reaches the bottom,

PE = KEKE = mghv² = 2mghv² = 2(1)(10)(100)v² = 2000v = √(2000) = 44.72 m/s

3d) The water will not be falling as fast as the speed calculated in part c suggests because of the presence of air resistance and the fact that the water falls through a medium (air) which offers resistance to its motion.

3e) To calculate the total energy transferred per second as the GPE stored in the water falling in one second is transferred to other energy stores, we use the formula given below:

Power = Energy / Time

Where,Power = 1 x 10⁶ x 10 x 100 = 1 x 10⁹ W = 1 GW (assuming that 1 m³ of water falls every second)3f)

The energy transferred when the GPE stored in the water falling in one second is transferred to other energy stores is finally stored in thermal energy stores due to the heat generated by the water as it hits the bottom.

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The kind of an element which the element described in Problem 25 (Its atomic mass is 3 times that of oxygen.) include the following: E. metal.

A chemical element can be defined as a pure substance that comprises atoms having the same atomic number (number of protons) in its nuclei and as such, it is the primary constituent of matter. Also, a common characteristics for all chemical elements found on the periodic table is mass and volume.

In Chemistry, some examples of a chemical element include the following:

Additionally, the atomic mass of oxygen and titanium are 16 and 48 respectively. This ultimately implies that, titanium is a metallic element (metal) with an atomic mass that is three (3) times greater than that of oxygen.

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To establish a pendulum system on the Moon with a period of 3.5 seconds, the pendulum would need to have a length of approximately 1.11 meters.

A pendulum is a weight suspended from a pivot so that it can swing freely. When a pendulum is displaced to one side of its equilibrium position and then released, it will swing back and forth, and the motion will continue until friction (or drag) causes the oscillations to gradually dampen and come to a halt. The time it takes for one complete oscillation, or period, of a pendulum is determined by its length and the force of gravity on it.

                     In the case of a pendulum on the Moon, the period would be longer than it would be on Earth because the force of gravity is weaker on the Moon. To determine the length of the pendulum needed for a 3.5 second period on the Moon, we can use the following formula:

T = 2π√(L/g)

Where: T = period of the pendulum L = length of the pendulum g = acceleration due to gravity On the Moon, the acceleration due to gravity is about 1.6 m/s², so we can plug in the given period of 3.5 seconds and solve for the length :L = (T²g)/(4π²) = (3.5² × 1.6)/(4π²) ≈ 1.11 meters

Therefore, the pendulum would need to be approximately 1.11 meters long to achieve a period of 3.5 seconds on the Moon.

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Answer:

12

Explanation:

What is the total kinetic energy of a hoop of radius 1 m and mass 2 kg that rolls at an

angular velocity of 1 rad/s?

they are made up of rock and gas

Answer:

Hydrogen and Helium. 75% Hydrogen and 25% Helium.

Explanation:

To calculate the net force on particle q₁, we need to calculate the electric forces between particle q₁ and particles q₂ and q₃, and then add them together taking into account their direction. The electric force between two point charges is given by Coulomb's law:

F = k * (q₁*q₂) / r²

where k is Coulomb's constant (k = 9.0 x 10⁹ N*m²/C²), q₁ and q₂ are the charges of the particles, and r is the distance between them.

Let's first calculate the force between particles q₁ and q₂:

F₁₂ = k * (q₁*q₂) / r₁₂²

F₁₂ = 9.0 x 10⁹ N*m²/C² * (8.0 x 10⁻⁶ C) * (3.5 x 10⁻⁶ C) / (0.10 m)²

F₁₂ = 2.52 x 10⁻² N

The force between particles q₁ and q₂ is positive, since both particles have the same sign (+8.0 μC and +3.5 μC). Therefore, the force points to the right.

Now let's calculate the force between particles q₂ and q₃:

F₂₃ = k * (q₂*q₃) / r₂₃²

F₂₃ = 9.0 x 10⁹ N*m²/C² * (3.5 x 10⁻⁶ C) * (-2.5 x 10⁻⁶ C) / (0.15 m)²

F₂₃ = -8.40 x 10⁻³ N

The force between particles q₂ and q₃ is negative, since they have opposite signs (+3.5 μC and -2.5 μC). Therefore, the force points to the left.

Now we can calculate the net force on particle q₁:

F_net = F₁₂ + F₂₃

F_net = 2.52 x 10⁻² N + (-8.40 x 10⁻³ N)

F_net = 1.68 x 10⁻² N

The net force on particle q₁ is positive, since the force between particles q₁ and q₂ is greater than the force between particles q₂ and q₃, and both forces have the same direction.

Therefore, the net force points to the right. The magnitude of the net force is 1.68 x 10⁻² N.

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North Carolina's Fayetteville has a tangential speed of 1372.2 km/h.

About 30 kilometers (18 miles) per second is the sideways velocity, or tangential velocity as astronomers refer to it. But we do have an orbit that is almost a billion kilometers in diameter each year!

The radius at latitude 35 °N must first be determined in order to determine the tangential speed there.

\(r_{lat} = r_{eq} * cos\) (35)

\(r_{lat} = r_{eq} * cos\) = 6380*35 = 5226.2

2π *5226.2 / 23.93

=> 1372.2 km/h

As a result, Fayetteville, North Carolina's tangential speed is 1372.2 km/h.

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What is the volumetric flow rate of air at the turbine exit ?

The volumetric flow rate of air at the turbine exit is 6.06 m3/s.

To determine the volumetric flow rate of air at the turbine exit, we need to use the ideal gas law:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.

First, we need to find the number of moles of air exiting the turbine. We can do this using the mass flow rate and the molar mass of air:

n = m/M

where m is the mass flow rate and M is the molar mass of air (approximately 28.97 g/mol).

n = 11.5 kg/s / 0.02897 kg/mol
n = 397.3 mol/s

Next, we can rearrange the ideal gas law to solve for the volume:

V = nRT/P

Plugging in the given values:

V = (397.3 mol/s)(8.31 J/mol*K)(423.15 K)/(200,000 Pa)
V = 6.06 m3/s

Therefore, the volumetric flow rate of air at the turbine exit is 6.06 m3/s.

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The relative density of paraffin is 1.8, which means that it is 1.8 times denser than water.

The relative density of a substance is defined as the ratio of its density to the density of a reference substance. In this case, we can use water as the reference substance, which has a density of 1 g/cm³ at room temperature.

To calculate the relative density of paraffin, we first need to determine the volume of the bottle. We can do this by subtracting the weight of the empty bottle (25g) from the weight of the full bottle when filled with water (50g), which gives us a volume of 25 cm³.

Next, we can use the mass of the full bottle when filled with paraffin (45g) and the volume of the bottle (25 cm³) to calculate the density of paraffin. Density is defined as mass per unit volume, so we can use the formula:

density = mass / volume

density of paraffin = 45g / 25 cm³

density of paraffin = 1.8 g/cm³

Finally, we can calculate the relative density of paraffin by dividing its density by the density of water:

relative density of paraffin = density of paraffin / density of water

relative density of paraffin = 1.8 g/cm³ / 1 g/cm³

relative density of paraffin = 1.8

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Answer:fda

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The toy car is moving at a speed of approximately 5.74 m/s after it has been pushed for a distance of 2 meters.

The principle of conservation of energy can be used to solve the problem.

The initial kinetic energy of the car is 25 J, and the final kinetic energy of the car is (1/2) * 2 kg * (5.74 m/s)^2, which is approximately 40.97 J.

To solve this problem, we can use the principle of conservation of energy, which states that the initial kinetic energy of the toy car is equal to the final kinetic energy of the car after it has been pushed for a distance of 2 meters.

The initial kinetic energy of the car is given by:

KE1 = (1/2) * m * v1^2

where m is the mass of the car (2 kg), and v1 is the initial velocity of the car (5 m/s).

KE1 = (1/2) * 2 kg * (5 m/s)^2

KE1 = 25 J

The final kinetic energy of the car is given by:

KE2 = (1/2) * m * v2^2

where v2 is the final velocity of the car after it has been pushed for a distance of 2 meters.

Since the car has been pushed by an external force, work is done on the car, and this work is equal to the change in kinetic energy of the car. The work done on the car is given by:

W = F * d

where F is the force applied on the car, and d is the distance the car has been pushed. Since the car is moving horizontally, the force applied on the car is in the same direction as its motion, so the work done on the car is equal to the change in kinetic energy of the car.

W = KE2 - KE1

Substituting the values we get:

W = (1/2) * 2 kg * v2^2 - 25 J

W = (1/2) * 2 kg * v2^2 - 25 J = F * d = (2 kg * a) * 2 m = 4 kg m/s^2 * 2 m = 8 J

Solving for v2 we have:

v2 = sqrt((2 * (W + KE1)) / m)

v2 = sqrt((2 * (8 J + 25 J)) / 2 kg)

v2 = sqrt(66 J / 2 kg)

v2 = sqrt(33) m/s

Therefore, the toy car is moving at a speed of approximately 5.74 m/s after it has been pushed for a distance of 2 meters.

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Answer:

Resistance / Edge 2022

Explanation:

This is late, but just in case someone needs the answer. Hope this helps!

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Tungsten metal is used exclusively for making the filament of electric bulbs because it has a very high melting point

Tungsten metal is used exclusively for making the filament of electric bulbs because it has a very high melting point. Due to its high melting point, the tungsten filament can be kept white-hot without melting away

Tungsten wire is used as the filament in light bulbs. It glows white-hot as current passes through it.

Tungsten is used in light bulbs because its high resistivity converts electric energy into light and heat.

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When all other factors are constant, the initial velocity determines the length of a projectile's trajectory.

A projectile is an object that is thrown or projected into the air and follows a path determined by the forces of gravity and air resistance. The length of a projectile's trajectory is determined by the time it takes for the projectile to reach its maximum height and the time it takes for the projectile to return to the ground. Initial velocity is the velocity at which a projectile is launched, and it determines the initial speed and direction of the projectile.

The greater the initial velocity, the farther the projectile will travel before hitting the ground, this is because the projectile spends less time in the air, so it has less time to slow down due to air resistance. In contrast, a projectile with a lower initial velocity will travel a shorter distance because it spends more time in the air and slows down more due to air resistance. Therefore, the initial velocity is a crucial factor that determines the length of a projectile's trajectory.

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Answer:

Mass

Explanation:

The total sum of atoms in an object is the mass of the object. There are several ways to quantify the number of atoms in a substance.

With a power rating of 0.800 W and a resistance of 400 Ω, the maximum voltage that can be safely connected across the resistor is approximately 17.89 volts.

The maximum voltage that can be safely connected across the resistor can be calculated using the formula P = V^2/R, where P is the power rating, V is the voltage, and R is the resistance.
Given that the power rating is 0.800 W and the resistance is 400 Ω, we can rearrange the formula to solve for V.

First, substitute the values into the formula:

0.800 = V^2/400

Next, multiply both sides of the equation by 400:

320 = V^2

To solve for V, take the square root of both sides of the equation:

V = √320

V ≈ 17.89 volts

Therefore, the maximum voltage that can safely be connected across the resistor is approximately 17.89 volts.

To summarize, with a power rating of 0.800 W and a resistance of 400 Ω, the maximum voltage that can be safely connected across the resistor is approximately 17.89 volts.

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The reading on the thermometer after 3 more minutes will be -13∘C. The thermometer will never read -4∘C after being taken outdoors.

To solve this problem, we can assume that the rate of change in temperature follows a linear pattern.

Let's first calculate the rate of change in temperature per minute:

Rate of change = (Final temperature - Initial temperature) / Time

a) After one minute:

Rate of change = (11∘C - 19∘C) / 1 minute = -8∘C/minute

To find the reading on the thermometer after 3 more minutes, we can multiply the rate of change by the time:

Change in temperature = Rate of change × Time

After 3 more minutes:

Change in temperature = -8∘C/minute × 3 minutes = -24∘C

The initial temperature was 11∘C, so the final temperature after 3 more minutes will be:

Final temperature = Initial temperature + Change in temperature = 11∘C - 24∘C = -13∘C

b) To find when the thermometer will read -4∘C, we need to determine the time it takes for the temperature to change from -5∘C to -4∘C.

Rate of change = (-4∘C - (-5∘C)) / Time

Rate of change = 1∘C / Time

We can rearrange the equation to solve for time:

Time = 1∘C / Rate of change

Substituting the given rate of change:

Time = 1∘C / (-8∘C/minute) = -1/8 minute

Since time cannot be negative, we can conclude that the thermometer will never read -4∘C after being taken outdoors.

Please note that this calculation assumes a linear rate of change in temperature, which might not hold true in all situations.

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The magnetic field around a magnet is mapped out by magnetic field lines, which are invisible lines. Lines of the magnetic field begin at one pole, arc around the magnet, and then return to the other pole.

A magnetic field, also known as a vector field, is the magnetic influence on moving electric charges, electric currents, and magnetic materials. A moving charge in a magnetic field experiences a force that is perpendicular to both its velocity and the magnetic field.

The opposite poles attract one another, while the same poles repel one another. When iron is rubbed against a magnet, its north-seeking poles align in the same direction. Aligned atoms exert force to create a magnetic field.

The Earth's magnetic field is shielded from cosmic radiation and charged particles from our Sun by the motion of molten iron in its core. In addition, compass navigation is built on top of it.

Electromagnetism: Faraday, Ampere, Lenz, and Lorentz laws apply.

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The average speed of the dragon fly for the interval from t = 0 to t = 8 s is 1 m / s

v = d / t

v = Average velocity

d = Total distance flown

t = Total time taken

d = 2 m ( Positive x-direction ) + 4 m ( negative x-direction ) + 2 m ( Positive x-direction )

d = 8 m

t = 8 s

v = 8 / 8

v = 1 m / s

Average speed is the average value of speed for a given distance at a given time. It can also be found using the initial and final velocities if the acceleration is constant.

The given question is incomplete. The complete question is:

A confused dragonfly flies forward and backward in a straight line. Its motion is shown on the following graph of horizontal position xx vs. time tt. What is the average speed of the dragon fly for the interval from t = 0 to t = 8 s? The graph is attached as image.

Therefore, the average speed of the dragon fly is 1 m / s

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The direction of the induced current is counterclockwise.

This states that induced electric current flows in a direction such that the current opposes the change that induced it.

The direction of the induced current is counterclockwise as a result of the north pole being oriented downwards which is the opposite direction of the hands of a clock movement.

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Color: Both the bromine gas and steak have a brownish color.

Bromine gas is a reddish-brown, nonflammable, and highly toxic gas with a very strong, unpleasant odor. It is composed of two heavy, diatomic, halogen molecules, Br2, and is the only nonmetal element that exists as a liquid at room temperature. Bromine gas is denser than air and is soluble in water and organic solvents.

Texture: The bromine gas is a gas and therefore has no texture, while the steak is solid and has a firm texture.
Temperature: The bromine gas is a gas and therefore has a lower temperature than the steak, which is at room temperature.
Bromine Gas and Juice:
Color: The bromine gas is brownish and the juice is a yellowish or orange color.
Texture: The bromine gas is a gas and therefore has no texture, while the juice is a liquid and has a smooth texture.
Temperature: The bromine gas is a gas and therefore has a lower temperature than the juice, which is at room temperature.

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The energy and power of the complex signal x[n] = re^(jπ/4)n can be determined by analyzing its mathematical properties.

To find the energy and power of the complex signal x[n] = re^(jπ/4)n, we need to evaluate the given expression. Let's break it down step by step. Here, "re" represents a real constant and "j" denotes the imaginary unit.

The signal x[n] = re^(jπ/4)n can be written as x[n] = r * 3^(n) * e^(jπn/4). The term r * 3^(n) is a geometric progression that grows or decays depending on the value of r. The exponential term e^(jπn/4) represents a rotating phasor with a phase angle of π/4.

To calculate the energy, we need to find the sum of the squared magnitudes of each sample of the signal over all time indices. Since the magnitude of e^(jπn/4) is constant (equal to 1), the energy of x[n] is proportional to the sum of the squared magnitudes of r * 3^(n). Depending on the value of r, the energy may vary.

The power of a discrete-time signal is the average energy per unit time. In this case, since the signal is defined in discrete-time, the power is determined by dividing the energy by the total number of samples in the signal.

In conclusion, to determine the energy and power of the complex signal x[n] = re^(jπ/4)n, we need to analyze the geometric progression component and consider the constant term r. The energy depends on the sum of squared magnitudes of r * 3^(n), while the power is calculated by dividing the energy by the total number of samples in the signal.

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Answer:

the answer is dielectric

hope helps you

Explanation:

Answer:

dielectric

Explanation:

edge

the statement, "Drum brakes automatically pump the brakes if wheel lock is imminent so long as the motorist continues to fully depress the brake pedal." is: False.

Drum brakes do not have the ability to automatically pump the brakes if wheel lock is imminent, regardless of whether the motorist continues to fully depress the brake pedal.

Drum brakes operate using a hydraulic system that relies on the mechanical force applied by the driver pressing the brake pedal.

Once the driver depresses the brake pedal, the hydraulic pressure is transmitted to the brake shoes, causing them to press against the drum and generate friction to slow down or stop the vehicle.

In situations where wheel lock is imminent, some modern vehicles equipped with anti-lock braking systems (ABS) can automatically modulate the brake pressure to prevent wheel lock.

ABS systems are typically found in vehicles with disc brakes, which are more commonly used in modern cars.

ABS uses sensors to detect wheel lock and modulates the brake pressure to allow the wheels to maintain traction while braking, enhancing the driver's ability to steer and control the vehicle during emergency braking situations.

However, drum brakes alone do not possess this automatic pumping capability.

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Answer:

c

Explanation:

To calculate the expected fixed manufacturing costs, we need to know the fixed manufacturing costs per unit produced.

The formula for calculating the fixed manufacturing cost per unit is the Fixed manufacturing cost per unit = Total fixed manufacturing cost / Total units produced. So if we have this information, we can use the above formula to calculate the fixed manufacturing cost per unit, and then multiply it by the number of units produced and sold to get the expected fixed manufacturing costs. Let's assume we have the following information: Total fixed manufacturing cost = $60,000Total units produced = 12,000Using the formula above, we can calculate the fixed manufacturing cost per unit: Fixed manufacturing cost per unit = $60,000 / 12,000 units= $5 per unit. To find the expected fixed manufacturing costs if 18,000 units are produced and sold, we can simply multiply the fixed manufacturing cost per unit by 18,000:Expected fixed manufacturing costs = Fixed manufacturing cost per unit x Total units produced and soldExpected fixed manufacturing costs = $5 per unit x 18,000 units. Expected fixed manufacturing costs = $90,000Therefore, the expected fixed manufacturing costs will be $90,000 if 18,000 units are produced and sold.

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Answer:

Chemical change.

Explanation:

The saliva or salivary amylase is a bio-catalyst...it causes chemical change during the dissolving process. Also, once the food is dissolved it can't be brought back to it's original state.