What is the kinetic energy of an object of mass 1.9kg travelling at 7m/s?
Give your answer to 2 decimal places.

The distributor's job is to distribute refrigerant equally throughout the circuiting of the evaporator. As the expansion valve's larger nozzle opens, the distributor maintains a constant flow rate.

An essential piece of machinery in the HVAC sector is the Thermal Expansion Valve (TXV). The valve's function is to regulate the flow of refrigerant into the evaporator section. In this manner, it regulates the discrepancy between superheat and the refrigerant temperature that is currently present at the evaporator outlet.

The thermal expansion relief valve works similarly to an expansion tank by taking up the extra pressure that thermal expansion causes in the plumbing system.

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Answer:

The answer is probably A

Answer:

a) 50 rad/s

b) 39.8 rev

Explanation:

Given:

r = 0.36 m

v₀ = 0 m/s

a = 1.8 m/s

t = 10 s

a) Find: ω

v = at + v₀

v = (1.8 m/s) (10 s) + (0 m/s)

v = 18 m/s

ω = (18 m/s) / (0.36 m)

ω = 50 rad/s

b) Find: Δθ

Δx = v₀ t + ½ at²

Δx = (0 m/s) (10 s) + ½ (1.8 m/s) (10 s)²

Δx = 90 m

Δθ = (90 m) / (2π × 0.36 m)

Δθ = 39.8 rev

Explanation:

can u pls ask the question again? No full information! I mean are you required the time it takes or what ?

Answer:

A grain of sand will sink because sand is more dense than water. Therefore, the sand sinks. Students should realize that if an object weighs more than an equal volume of water, it is more dense and will sink, and if it weighs less than an equal volume of water, it is less dense and will float.

third down, chris is correct

Answer:

A

Explanation:

Titan is able to keep an atmosphere because it has a much stronger gravitational pull than Mercury, despite being only slightly larger.

Additionally, Titan's atmosphere is primarily composed of nitrogen, which has a relatively low escape velocity compared to other gases. This means that even though Titan's gravity is weaker than some other planets, it is still strong enough to hold onto the nitrogen molecules and keep them from escaping into space. The presence of methane and other hydrocarbons on the surface of Titan also helps to maintain its atmosphere through a process known as "methane rain," in which these molecules evaporate and then condense back onto the surface, cycling them back into the atmosphere.

Titan, the largest moon of Saturn, is able to keep an atmosphere despite its relatively small size because of a combination of factors, including its low surface temperature and the composition of its atmosphere.

Firstly, Titan's surface temperature is extremely cold, averaging around -180 degrees Celsius (-292 degrees Fahrenheit). This low temperature means that the gases in Titan's atmosphere move much more slowly than they would at higher temperatures, which reduces the rate at which they escape into space. This effect is known as "thermal escape," and is a major factor in determining whether a planet or moon can maintain an atmosphere.

Secondly, Titan's atmosphere is composed primarily of nitrogen, which is a relatively heavy gas compared to hydrogen and helium, the two lightest elements in the universe. This means that nitrogen is less likely to be lost to space due to thermal escape, because it has a lower average velocity than lighter gases.

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Time = distance / velocity

52.1 meters / 18.5 m/s = 2.82 secondsT

The speed of light Slows because the lens has a greater refractive index.

In a vacuum, which has a refractive index of 1, light moves at a speed of about 300,000 km/s, but in water and glass, its speed drops to 225,000 km/s and 200,000 km/s, respectively.

Light moves. Slower in lens but faster in the air That’s because light refracts when it comes into contact with various materials.

The density of the medium affects the speed at which light propagates. The only thing that happens when a light beam enters glass from a vacuum (air) is that the wave is delayed (takes longer to go the same distance as a result of the delay).

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Correct question:

When light generated by a lamp in a microscope passes into a lens, the speed of the light _______ because the glass lens has a _______ refractive index than the air from which the light came.

The average power developed by the boy during the climb is approximately 29.4 W.

In physics, the amount of energy transferred or converted per unit time is called power.

total height = number of steps x height of each step

total height = 30 x 0.15 m = 4.5 m

Given, time = 60 s

As power = work done / time

work done = force x distance

force = mass x gravity

mass is boy's mass (40 kg) and gravity is acceleration due to gravity (9.81 m/s²).

force = 40 kg x 9.81 m/s² = 392.4 N

The distance that the boy moves is equal to the total height that he has climbed: distance = total height = 4.5 m

work done = force x distance

work done = 392.4 N x 4.5 m = 1765.8 J

power = work done / time

power = 1765.8 J / 60 s

power ≈ 29.4 W

Therefore, the average power developed by the boy during the climb is approximately 29.4 W.

As for the anomalous behavior of water, water has a higher boiling point and melting point as compared to other substances with similar molecular weight. This is due to the strong hydrogen bonding between water molecules, which requires more energy to break the bonds and change the state of water from solid to liquid to gas.

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Answer:

b

Explanation:

2 x 10⁻¹⁸ C is the charge on each of the pieces.

In physics, Charge is electric charge, electrical charge, or electrostatic charge and symbolized as q, is a characteristic of a unit of matter that expresses the extent to which it has more or fewer electrons than protons.

According to the question,

Fс = 4 x 10⁻²³ N

d = 0.03 m  , k = 9.0 x 10⁹ N·m²/C²

q =?

The force exerted by one charge q on another charge Q a distance r away is given by:

Coulomb's law:

Fc =\(\frac{kq_{1} q_{2} }{d^{2} }\)

By solving the equation:

\(q1q2 =\frac{F_{c} d^{2} }{k}\)

\(\frac{(4*10^{-23}(0.03m )^{2} }{(9.0*10^{9}N.m^{2}/C^{2}) }\)

= 4 x 10 ⁻³⁶C²

This is the square of the charge on the pieces of puffed rice.

Now, to find the charge on one piece of puffed rice,

take the square root of this number.

q = √4 x 10⁻³⁶ C²

q = 2 x 10⁻¹⁸ C

Therefore,

The charge on each of the pieces is 2 x 10⁻¹⁸ C

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First, we need to do a type conversion. Because the types of the two given quantities are different. One is in minutes. The other is in hours. A vehicle that travels \(45\) kilometers in an hour travels how many meters in a second?

A vehicle that travels \(12.5\) meters in a second travels how many meters in \(20\) minutes?

Distance divided by time is known as the speed of the given body or the object the result we get out by dividing the distance from the time is a scalar quantity as it does not depend on the direction of the moving object.

The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object. The unit of speed is a meter/second. The generally considered unit for speed is a meter per second.

Let us suppose an ant is moving and it covers a total distance of 2.5 meters in 25 seconds, then if we divide the time taken by the ant by the distance traveled by the ant we would get the speed of the ant.

Thus, distance divided by time is known as speed.

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Answer:

Increase the force and/or decrease the mass

Explanation:

A = F/m per Newton's second law, so increasing the force or decreasing the mass will increase acceleration

The mass (in grams) Ricardo should measure out on the scale, given that he has 2500 mg is 2.5 g (Option B)

To obtain the mass that Ricardo should measure out on the scale, we shall convert 2500 milligrams (mg) to grams (g). This is illustrated below:

Conversion scale

1000 mg = 1 g

Therefore

2500 mg = (2500 mg × 1 g) / 1000 mg

2500 mg = 2.5 g

From the above, we can see that 2500 mg is equivalent to 2.5 g

Thus, we can conclude from the above illustration that the mass Ricardo should measure out on the scale is 2.5 g (Option B)

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Answer: 1102.5 meters

Explanation:

Answer:

1. While boiling replace the cap and allow it to cool. Vapours inside condense and form water creating vacuum above them. Observation - The can crumbles due to air pressure from outside. This proves that air exerts pressure.

2. Measure the volume of the liquid displaced when the object is submerged. Measure the initial volume of water in graduated cylinder. Submerge the irregular object. Measure the final volume of the water.

— The difference between the initial volume and the final volume is the volume of the object.

hope can help ^_^

Answer:

4 weight loss

Explanation:

Answer:

a = v^2 / R = 4.5^2 / R = 29

R = 4.5^2 / 29 = .70 m

a.) The source of the centripetal force acting on the riders is the normal force exerted by the wall on the riders. b.)The centripetal force acting on a 55.0 kg rider is 1665 N.(c.)The minimum coefficient of static friction required for the rider  is greater than 1.

a) The source of the centripetal force acting on the riders is the normal force exerted by the wall on the riders. As the floor falls away, the riders continue to move in a circular path due to this centripetal force.

b) The centripetal force acting on a 55.0 kg rider can be calculated using the formula Fc = m * ac, where ac is the centripetal acceleration of the rider, and is given by \(ac = v^2 / r,\) where v is the speed of the wall and r is the radius of the cylindrical room.

The calculated centripetal force acting on the rider is 1665 N.

c) The minimum coefficient of static friction required for the rider to remain in place when the floor drops away can be determined by equating the force of static friction between the rider's back and the wall to the centripetal force acting on the rider.

The force of static friction is given by fs = μs * N, where μs is the coefficient of static friction and N is the normal force exerted by the wall on the rider. The minimum coefficient of static friction is not a meaningful value since the result obtained is greater than 1, which is not physically possible.

Various factors such as the shape of the rider's body, the speed of the ride, and air resistance will affect the rider's motion

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Answer:

The angle of refraction is the angle made by a refracted ray with perpendicular to the refracting surface.

n = sin(i)/sin(r)

= sin(45 deg)/sin(30 deg)

= sqrt(2)

= 1.41

The area of each cylinder is 50.27 in² and 113.10 in² for both input and output respectively.

The pressure in the system is 1.98 psi.

The force the output cylinder can lift is 225 lb.

The mechanical advantage of the system is 2.25.

I) The area of a circle is calculated by the formula:

Area = πr²

Where π = mathematical constant with an approximate value of 3.14, and r = radius of the circle.

The radius of the input cylinder is 4 inches, so the area of the input cylinder is:

Ain = πr² = 3.14 × 4² = 50.27 in²

The radius of the output cylinder is 12 inches, so the area of the output cylinder is:

Aout = πr² = 3.14 × 12² = 113.10 in²

II) Pressure is calculated by the formula:

Pressure = Force / Area

The force applied to the input cylinder is 100 pounds, and the area of the input cylinder is 50.27 square inches, so the pressure in the system is:

P = F / A = 100 lb / 50.27 in² = 1.98 psi

III) The mechanical advantage of a hydraulic press is calculated by the formula:

MA = Aout / Ain

The area of the output cylinder is 113.10 square inches, and the area of the input cylinder is 50.27 square inches, so the mechanical advantage of the system is:

MA = Aout / Ain = 113.10 in² / 50.27 in² = 2.25

The force that the output cylinder can lift is equal to the force applied to the input cylinder multiplied by the mechanical advantage of the system.

So, the force that the output cylinder can lift is:

Fout = Fin × MA = 100 lb × 2.25 = 225 lb

IV) The mechanical advantage of a hydraulic press is the ratio of the force that the output cylinder can lift to the force that is applied to the input cylinder. In this case, the mechanical advantage of the system is 2.25. This means that the output cylinder can lift 2.25 times as much force as is applied to the input cylinder.

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If the force is constant, the resulting force, F, and its duration, t, are multiplied to form the force's impulse. Force's impulse is what alters motion, which in turn changes momentum.

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A 60-cm diameter wheel accelerates uniformly from 130 rpm to 320 rpm in 4.1 s.

The problem gives us two important pieces of information about the wheel's motion: its initial and final rpm, and the time it took for the acceleration to occur.

To solve for the wheel's acceleration, we can use the following equation:

a = (v_f - v_i) / t

where a is acceleration, v_f is final velocity, v_i is initial velocity, and t is time. In this case, substituting the given values gives:

a = (320 rpm - 130 rpm) / 4.1 s

a = 46.34 rpm/s

Next, we can use the wheel's diameter to convert its rpm into linear velocity, using the formula:

v = πdN / 60

where v is velocity, d is diameter, and N is rpm. Substituting the given values gives:

v_i = π(60 cm)(130 rpm) / 60 = 409.16 cm/s

v_f = π(60 cm)(320 rpm) / 60 = 1022.91 cm/s

Finally, we can use the time and acceleration to find the distance the wheel traveled during its acceleration, using the formula:

d = vi*t + (1/2)at^2

where d is distance, vi is initial velocity, t is time, and a is acceleration. Substituting the given values gives:

d = (409.16 cm/s)(4.1 s) + (1/2)(46.34 rpm/s)(4.1 s)^2

d = 782.34 cm

Therefore, the wheel traveled approximately 7.82 meters during its acceleration.

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To determine the number of storage bits required in the controller memory for the twisting joint (type T) of the industrial robot, we need to calculate the repeatability, round the deviations to a reasonable precision, and then calculate the number of addressable positions based on the range of the joint and the chosen accuracy level.

First, let's calculate the repeatability of the joint. Given that the range of rotation is 322°, the repeatability can be calculated as 6 times the standard deviation. Since the standard deviation is a measure of how spread out the data is, multiplying it by 6 ensures that the accuracy of the joint is as close as possible to, but less than, its repeatability.
Next, let's analyze the given data. The 10 samples of deviations from the commanded angles are: 0.176, 0.04, -0.345, 0.079, 0.309, -0.004, -0.102, 0.12, 0.075, and 0.1.
To calculate the standard deviation of these deviations, we need to find the mean and then calculate the differences from the mean. Squaring these differences and taking the average will give us the variance, which we can then take the square root of to obtain the standard deviation.

After calculating the standard deviation, we multiply it by 6 to obtain the repeatability.
Now, to determine the number of storage bits required, we need to consider the accuracy of the joint. The accuracy depends on the precision required for representing the deviations. Assuming a reasonable level of precision, we can round the deviations to, for example, 3 decimal places.
Finally, the number of storage bits required in the controller memory can be calculated by multiplying the range of the joint (322°) by the accuracy (e.g., 0.001°, considering 3 decimal places). This will give us the number of addressable positions, which can be represented by the required number of storage bits.

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Answer:

yes it is a reactant

For the given mode values with n > 1, we will calculate the average frequency and uncertainty for each resonance based on the spread in the measured maximum and minimum sustainable frequencies are 33.3 Hz and 47.7 Hz.

For n = 2, the maximum sustainable frequency is 33.6 Hz, and the minimum sustainable frequency is 33.3 Hz. To calculate the average frequency, we take the average of these two values: (33.6 Hz + 33.3 Hz) / 2 = 33.45 Hz. The uncertainty is obtained by taking half of the difference between the maximum and minimum frequencies: (33.6 Hz - 33.3 Hz) / 2 = 0.15 Hz. Therefore, the average frequency for n = 2 mode is 33.45 Hz with an uncertainty of ±0.15 Hz. The fundamental frequency for this mode would be the minimum sustainable frequency, which is 33.3 Hz.

For n = 3, the maximum sustainable frequency is 48.9 Hz, and the minimum sustainable frequency is 47.7 Hz. Following the same procedure, the average frequency is (48.9 Hz + 47.7 Hz) / 2 = 48.3 Hz, and the uncertainty is (48.9 Hz - 47.7 Hz) / 2 = 0.6 Hz. Therefore, the average frequency for n = 3 mode is 48.3 Hz with an uncertainty of ±0.6 Hz. The fundamental frequency for this mode is 47.7 Hz.

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