Water flows through a garden hose (radius =1.5 cm ) and fills a tub of volume V=200 Liters in Δt=5.6 minutes. What is the speed of the water in the hose in meters per second? Your Answer: Answer Question 15 (6 points) A beach ball is filled with air and has a radius of r=49 cm. How much mass would be needed to pull the ball underwater in a swimming pool? Answer in kg and assume the volume of the added weight is negligible.

The Mariner 4 spacecraft encountered a cloud of space dust during its mission to Mars in 1965.

Mariner 4 was the fourth spacecraft in NASA's Mariner program and the first to successfully conduct a flyby of Mars, sending back the first close-up images of the planet's surface.

On July 29, 1965, as Mariner 4 was approaching Mars, the spacecraft encountered a cloud of interplanetary dust particles. This caused some concern among mission controllers, as the dust particles could have potentially damaged the spacecraft's delicate instruments.

Fortunately, the spacecraft survived the encounter with the dust cloud and continued on to conduct its historic flyby of Mars on July 14, 1965. During the flyby, Mariner 4 captured 21 images of Mars, providing the first close-up views of the planet's surface and revolutionizing our understanding of our neighboring planet.

The encounter with the space dust cloud was just one of the many challenges faced by the Mariner 4 mission, but its successful navigation through it demonstrated the resilience and technological prowess of NASA's early space probes.

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The CAT- III rating relates to high voltage and high energy. The correct options are Option A and Option B

Circuit breakers, wiring, switches, and other electrical installations found in a structure are referred to as CAT III.

The transient voltage range present on the majority of distribution circuits can be handled by test equipment having a CAT III rating. These devices are mostly utilized on branch circuits or fixed primary feeds.

The primary distinction between Category II and Category III operations is that Category II offers enough visual cues to allow a manual landing at DH, whereas Category III does not and necessitates an autonomous landing system.

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Answer:

yes it does exert a force, it pushes it up

Explanation:

this is called normal force

if it didn't exert a force the book would keep going down

according to newton every force has an equal amd opposite reaction

so the book exerts a force on the table and vice versa

hope this helped

Answer:

the bonds that are formed

Explanation:

Energy is absorbed in order to break bonds.  Energy is released when new bonds are formed. Bond-making is a process of exothermic. Whether the reaction is endothermic or exothermic refers to the difference between the energy needed to break bonds and the energy released when new bonds are formed.

The net charge on the metal sphere after adding 1.00 × 10¹⁴ electrons is 3.596 × 10⁻⁵ C. This is calculated by adding the initial charge of +5.0 C to the charge added by the electrons (-1.602 × 10⁻¹⁹ C per electron).

The net charge on the sphere is the sum of the initial charge and the charge added by the electrons. The charge added by the electrons is equal to the number of electrons multiplied by the charge on each electron (which is -1.602 × 10⁻¹⁹ C).

So, the net charge Qf is:

Qf = Qi + Ne * (-e)

where Qi is the initial charge (+5.0 C), Ne is the number of electrons added (1.00 × 10¹⁴), and -e is the charge on each electron (-1.602 × 10⁻¹⁹ C).

Substituting the values, we get:

Qf = 5.0 C + 1.00 × 10¹⁴ * (-1.602 × 10⁻¹⁹ C) = 3.596 × 10⁻⁵ C

Therefore, the net charge on the sphere after 1.00 × 10¹⁴ electrons have been placed on it is 3.596 × 10⁻⁵ C.

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Answer:

4.    0.12mm

5:

a. screw gauge

b. caliper

Answer:

0.11 mm

vernier calipers

im not sure about the sure about B

Explanation:

The air speed of the helicopter has the ground speed of 250 km/h is 233 km/h  

The ground speed of the helicopter = 250 km/h

The wind speed of the helicopter = 17 km/h

The air speed of the helicopter can be found using the formula,

            G = W + A
where G is the ground speed of the helicopter

           W is the wind speed of the helicopter

           A is the air speed of the helicopter

Let us rearrange the equation in order to get the airspeed,

          A = G - W

Let us substitute the known values in the above equation, we get

          A = 250 - 17

              = 233 km/h  

Therefore, the air speed of the air speed is 233 km/h

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A Carnot heat engine is a theoretical engine that operates on the Carnot cycle. The basic model for this engine was developed by Nicolas Léonard Sadi Carnot in 1824. ... In the process of going through this cycle, the system may perform work on its surroundings, thereby acting as a heat engine.

The initial Ecell for the given voltaic cell is approximately 0.0263 V.

The rearranged calculation for the initial cell potential (Ecell) is as follows:

Given:

[Ni2+] = 0.80 M

[Co2+] = 0.20 M

E°cell = -0.26 V (Ni2+ reduction) - (-0.28 V) (Co2+ reduction) = 0.02 V

n = 2 (number of electrons involved)

F = Faraday constant = 96485 C mol^-1

R = gas constant = 8.314 J mol^-1 K^-1

T = temperature in kelvins = 298.15 K

Q = [Ni2+]³[Co2+]/(1)² = 0.80³ * 0.20 = 0.256

Ecell = E°cell - (RT/nF)lnQ

Ecell = 0.02 V - (8.314 * 298.15 / (2 * 96485)) ln(0.256)

Ecell ≈ 0.02 V - 0.0063

Ecell ≈ 0.0263 V

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After watching the Ted Talk, there were still a few questions that I had about supermassive black holes. Firstly, I wanted to know more about the event horizon and what it exactly entails. Although the speaker briefly touched upon this subject, I would have appreciated a more in-depth explanation. Additionally, I would have liked to know more about the role of supermassive black holes in the universe.

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We can determine how the density changes with the radius of the sun using helioseismology.

Helioseismology is the study of the interior of the Sun through its surface oscillations, similar to how seismologists study the Earth's interior through earthquakes. By analyzing these oscillations, scientists can determine how the density changes with the radius of the Sun.

The other options are a. radar observations, b. neutrino detections, c. high-energy (gamma ray) observations, and e. infrared observations, can provide valuable information about the Sun, but they are not the most effective methods for determining changes in density with radius.

So, option d is correct.

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Answer:

4. The reading decreases because part of your weight is applied to the table and the table exerts a matching force on you that acts in the direction opposite to your weight.

Explanation:

When you push on anything, Newtons Third Law comes into effect: "when two objects interact, they apply forces to each other of equal magnitude and opposite direction." So pretty much, the table you are putting some of your weight on is taking some of the downward force and in return the scale isn't going to push up with as much force.

I'm not the best at explaining, but im in physics right now and thats somewhat how my teacher explained it.

Jeff has created a device that can convert solar energy into electricity. This innovative technology harnesses the power of sunlight to generate electrical energy, providing a sustainable and renewable source of power.

Jeff's device utilizes photovoltaic cells to convert solar energy into electricity. Photovoltaic cells, commonly known as solar cells, are made of semiconducting materials, such as silicon, that can absorb photons from sunlight.

When sunlight hits the solar cell, it excites electrons within the material, creating an electric current. The photovoltaic cells are arranged in a panel or module, which can be connected in series or parallel to achieve the desired voltage and current levels.

To optimize the conversion of solar energy, Jeff's device may include additional components, such as a charge controller, which regulates the charging of batteries or the direct usage of electricity.

It may also feature an inverter to convert the direct current (DC) produced by the solar cells into alternating current (AC), suitable for powering appliances and feeding into the electrical grid.

Overall, Jeff's device harnesses the photovoltaic effect to transform solar energy into a usable form of electricity, providing a sustainable and renewable energy source.

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An ideal fluid, of density 0.90 ´ 103 kg/m3, flows at 6.0 m/s through a level pipe with radius of 0.50 cm. The pressure in the fluid is 1.3 ´ 105 N/m2. This pipe connects to a second level pipe, with radius of 1.5 cm. The speed of flow in the second pipe is 0.666 m/s.

The speed of flow in the second pipe, we can use the principle of conservation of mass, which states that the mass flow rate through any cross-section of a pipe must remain constant.
The mass flow rate can be expressed as:
mass flow rate = density x cross-sectional area x speed of flow
Since the fluid is ideal, its density remains constant throughout the pipes. Therefore, we can set the mass flow rate in the first pipe equal to the mass flow rate in the second pipe:
density x A1 x v1 = density x A2 x v2
where A1 and v1 are the cross-sectional area and speed of flow in the first pipe, and A2 and v2 are the cross-sectional area and speed of flow in the second pipe.
We are given the density, speed of flow, and radius of the first pipe. Using the formula for the cross-sectional area of a pipe (A = πr^2), we can calculate the cross-sectional area of the first pipe:
A1 = π(0.50 cm)^2 = 0.785 cm^2
We want to find v2, the speed of flow in the second pipe. We are given the radius of the second pipe, so we can calculate its cross-sectional area:
A2 = π(1.5 cm)^2 = 7.069 cm^2
Substituting the known values into the equation for conservation of mass, we get:
0.90 x 10^3 kg/m^3 x 0.785 cm^2 x 6.0 m/s = 0.90 x 10^3 kg/m^3 x 7.069 cm^2 x v2
Simplifying and converting units, we get:
v2 = (0.785 cm^2 x 6.0 m/s) / 7.069 cm^2 = 0.666 m/s
Therefore, the speed of flow in the second pipe is 0.666 m/s.

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Explanation:

I think it is the third image as marked in the diagram I kept above because as we know first class levers have the fulcrum between the force and the load

Answer: Current, resistance and voltage are the quantities which are related by Ohm's law.

Explanation:

A law which states that electric current is directly proportional to voltage and inversely proportional to resistance is called Ohm's law.

Mathematically, it is represented as follows.

\(I = \frac{V}{R}\)

where,

I = current

V = voltage

R = resistance

This means that the quantities related by Ohm's law include current, voltage and resistance.

Thus, we can conclude that current, resistance and voltage are the quantities which are related by Ohm's law.

Answer:

The answer is 1, 3, 5.

Explanation:

did it right

The effect of the factors which he can he actually find out using only this lamp to determine the size of shadow is the light intensity and type of object.

This forms part of the scientific methods and is referred to as a procedure which is used to support or refute an hypothesis.

The size of the shadow is dependent on factors such as the light intensity and the type of object. Since the lamp produces the light in which the intensity can be gotten and the type of material it is in contact with then it therefore the correct choices.

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Answer:

the velocity is like 17 or something ion even know

Explanation:

Answer:

The ball takes \($t=1 \cdot 917sec$\) to hit the ground.

Explanation:

• The second equation of motion represents the total distances travelled by an object in a time interval of \($\Delta t$\) with an initial speed of \($u$\) and acceleration \($a$\).

• To find the time, ball takes to hit the ground, use the formula: \($$s = ut + \frac{1}{2}a{t^2}$$\)

Where, \($t$\) is time, \($u$\) is initial velocity, \($a$\) is acceleration and\($s$\) is displacement.

• In this case, \($a = g = 9 \cdot 8m/se{c^2}$\).

• Placing the value of the given initial velocity, \($u=0cm/s$\) and displacement,\($s = 13m$\) in the above formula.

\(& \therefore s = ut + \frac{1}{2}g{t^2} \\& \Rightarrow 13 = 0 \cdot t + \frac{1}{2} \times 9 \cdot 8 \times {t^2} \\\)

\(& \Rightarrow 13 = 4 \cdot 9{t^2} \\& \Rightarrow {t^2} = \frac{{13}}{{4.9}} \\& \Rightarrow t = 1 \cdot 917sec \\\end{align}\]\)

• Hence, ball takes \($t=1 \cdot 917sec$\) to hit the ground.

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Explanation:

The formula to determine the eccentricity of an ellipse is the distance between foci divided by the length of the major axis

Answer:

Explanation:

Hope this helps :)  

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Answer:

if we ignore air resistance .. which might slow her down a lot towards the end of the 7 seconds.. but we will just ignore that for this question

Explanation:

then V=Vo+a*t

Vo=0

V=a*t

V=9.8(7)

V=68.6 m/s  just a little over 150 MPH.. but.. I think terminal velocity is close to 120... soo hmm maybe about that fast... but that with air resistance.. so this problem depends a lot on if you're going to ignore that

Answer:

Explanation:

When an object is dropped in the air , it experiences free fall.

Free fall is a special type of motion in which the only force acting upon an object is gravity. They do not encounter a significant force of air resistance

The predicted acceleration of the car if the applied force were cut in half would be 2.94 m/s^2.

Given data, Mass of car, m = 850 kg

Force applied, F = 5000 N

First, calculate the acceleration with the given data using the following formula

      ,F = ma         Where,F = 5000 Nm = 850 kg

Using the above formula, a can be found as below:  a = F / ma = 5000 / 850a = 5.88 m/s^2

The acceleration of the car with the given data would be 5.88 m/s^2.

Now, if the applied force were cut in half, the acceleration can be calculated using the same formula as follows ,F = ma

Where,F = 2500 N         m = 850 kg

Using the above formula, a can be found as below:  

                 a = F / ma = 2500 / 850a = 2.94 m/s^2

Therefore, the predicted acceleration of the car if the applied force were cut in half would be 2.94 m/s^2.

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The slope of the plot of d vs \(t^2\)should be equal to one-half of the acceleration of the object.

If a graph plotting the distance travelled (d) of an object against time squared (t2) is well-fitted by a straight line, then its slope can be used to calculate the acceleration of said object.

We can observe this relationship by rearranging the kinematic equation for distance travelled (d) with a constant acceleration (a):\(a = 2 * d / t^2.\)

In order to calculate the constant acceleration of an object, we need to draw a straight line with the slope equal to 2a on a graph of d vs \(t^2\). By rearranging the equation we get

:\(a = 2d / t^2.\)

Now, by dividing both sides of this equation by 2, we can obtain the acceleration, which is simply given by

:\(a = d / t^2.\)

\(a/2 = d / t^2\)

This tells us that the slope of the plot of d vs \(t^2\)should be equal to one-half of the acceleration of the object.

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Answer:

,

Explanation:

Answer:

Is

• speeding up while moving forward

Answer:

pe=mgh

Explanation:

hope this helped