a hand truck is used to move a compressed-air cylinder. assume that the combined weight of the truck and cylinder is 220 lb.

Answer:

(a) halfway between the like poles of two magnets, because the field lines bend away and do not enter this area

Explanation:

Got it correct on the test.

Answer:

(a) halfway between the like poles of two magnets, because the field lines bend away and do not enter this area

Explanation:

Answer:

global warming.

because these gases, react with the ozone gas in the ozone, hence fading away the ozone layer.

This allows direct sun rays to fall on to Earth's surface hence warming up called global warming

Too many greenhouse gasses in the atmosphere may block heat from escaping into space and trap too much heat next to the Earth’s surface causing: global warming. *

The human activities produce greenhouse gases such as carbon dioxide, carbon monoxide, methane, nitrogen oxides and others gases.

These gases when enter into the atmosphere because of their diatomic structure are capable of trapping the light energy from sun.

The abundance of these gases in the air is making the global temperature warm, which chiefly responsible for drought like conditions and melting of glaciers in some locations.  

Then The trapped sunlight cannot be reflected back to the space this phenomena is called as greenhouse effect and the phenomena of increase in global temperature is called as global warming.

Which allows direct sun rays to fall on to Earth's surface hence warming up called global warming.

Hence, Too many greenhouse gasses in the atmosphere may block heat from escaping into space and trap too much heat next to the Earth’s surface causing: global warming. *

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There are several objects that move in space.

There are many scenarios that demonstrate the motion of objects in space. Here are some examples:

Planetary motion: The motion of planets in the solar system is a classic example of objects in space in motion. The planets orbit around the sun in elliptical paths, with their motion governed by the gravitational pull of the sun.

Satellites: Satellites are artificial objects that are launched into space to perform various tasks, such as communication, navigation, and weather monitoring. The motion of satellites is determined by the gravitational forces of the Earth and other celestial bodies.

Asteroids and comets: Asteroids and comets are small, rocky or icy objects that orbit the sun. Their motion is also governed by the gravitational forces of the sun and other celestial bodies, and their orbits can be highly elliptical.

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Answer:

-0.383 m

Explanation:

Diameter of cylinder = 4m  therefore  r = 2

height of cylinder ( H ) = 4 m

specific gravity = 0.6 ( assumed )

depth of immersion = 'h'

Determine the metacentric height

weight of cylinder in water = water displaced

= 0.6 * 1000 * πr^2* H = 1000 * πr^2* h

= 0.6 * 4 = h

∴ h = 2.4 m

hence the depth of center of buoyancy from free space = h /2 = 1.2 m

The metacentric height can be calculated using the formula below

Gm = Io / Vsubmerged  - BG

attached below is the remaining solution

Answer:

The best explanation is that the first person is grounded to the earth, and his/her body either draws up negative charges from the earth, or tend to conducts negative charges to the earth, depending on the charge on the balloon.

Explanation:

The earth is an infinite store for charges. In the first case where the second person brings a negatively charged balloon towards the first person, the negative charges on the balloon induces the first person's body to tend to attract the negative charges on the balloon through the first person's body to the positive charges within the earth. In the second case when again a positively charged balloon is brought near the first person's hair, the positive charges on the balloon induce the first person's body into drawing up negative charges from within the earth. This charges, and their opposite induced charges, create an attractive force between the hair strands and the balloons.

Answer:

A book on a table before it falls.

A yoyo before it is released.

A raised weight.

Explanation:

These are all examples of potential energy. So I hope you can find something that is comparable from the lab.

The femur can withstand a compression of about 4.1945 mm before breaking.

We can use the formula for compressive stress to calculate the amount of compression that the femur bone can withstand before breaking:

Stress = Force / Area

where the force is the force applied to the bone and the area is the cross-sectional area of the bone.

To find the cross-sectional area of the femur bone, we can assume that it has a circular cross-section and use the formula:

Area = πr^2

where r is the radius of the cross-section.

Since the length of the femur bone is 0.5 m, we can assume that the cross-sectional area remains constant along its length.

Let's assume that the force required to break the bone is the maximum compressive stress that it can withstand, which is 1.51 × 10^8 Pa. We can rearrange the stress formula to solve for the force.

We can use the equation for strain under compression:

strain = stress / Young's modulus

where stress is the maximum stress the bone can withstand before breaking, and Young's modulus is a measure of the stiffness of the material. The strain is a measure of how much the bone compresses under stress.

To find the compression distance, we can rearrange this equation to solve for the compression distance:

compression distance = strain x original length

where the original length is the length of the bone before compression

Substituting the given values:

stress = 1.51 × 10^8 Pa

Young's modulus = 1.8 × 10^10 Pa

original length = 0.5 m

First, we can calculate the strain:

strain = stress / Young's modulus = (1.51 × 10^8 Pa) / (1.8 × 10^10 Pa) ≈ 0.008389

Next, we can calculate the compression distance:

compression distance = strain x original length = (0.008389) x (0.5 m) = 0.0041945 m

Finally, we can convert the result to millimeters:

compression distance = 0.0041945 m x (1000 mm/m) = 4.1945 mm

Therefore, the femur can withstand a compression of about 4.1945 mm before breaking using Stress = Force / Area

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Answer:

a.

b.

Explanation:

The change in tire's angular velocity is

Now,

Therefore,

Part B.

The average angular acceleration is given by

Now,

and

Therefore,

which is our answer!

Answer:

K.E. = 1/2mv^2

Explanation:

v is velocity (a vector) not speed (a scalar) but they have the same magnitude

Answer:

ac = 72 m/s²

Fc = 504 N

Explanation:

We can find the centripetal acceleration of the hammer by using the following formula:

\(a_c = \frac{v^2}{r}\)

where,

ac = centripetal acceleration = ?

v = constant speed = 12 m/s

r = radius = 2 m

Therefore,

\(a_c = \frac{(12\ m/s)^2}{2\ m}\)

ac = 72 m/s²

Now, the centripetal force applied by the athlete on the hammer will be:

\(F_c = ma_c\\F_c = (7\ kg)(72\ m/s^2)\)

Fc = 504 N

Answer: 5N

Explanation:

Horizontal component is the force that is applied as a result of the diagonal application of force.

here in this case,

given diagonal force =10N.

angle= 30°

horizontal component is found using trigonometry..

so,

A vector of magnitude 10 N is provided.

It is at an angle of 30° to the + x axis.

To find:

The components along the x and y axis.

Calculation:

Along x axis:

F(x) = F cos(θ)

=> F(x) = 10 × cos(30)

=> F(x) = 10 (√3/2) = 5√3N

Along y axis:

F(y) = F sin(θ)

=> F(y) = 10 sin(30°)

=> F(y) = 10 × ½

=> F(y) = 5 N.

Additional information:

1. A vector is a quantity that can be defined with both magnitude and direction.

2. Since force is a vector, we are able to break it down into components along chosen axis.

Answer:

Acceleration, a = 5 m/s²

Explanation:

Given the following data;

Initial velocity = 30 m/s

Final velocity = 60 m/s

Time = 6 seconds

To find the acceleration, we would use the first equation of motion;

V = U + at

Where;

V is the final velocity.

U is the initial velocity.

a is the acceleration.

t is the time measured in seconds.

Substituting into the equation, we have;

60 = 30 + a*6

60 - 30 = 6a

30 = 6a

Acceleration, a = 30/6

Acceleration, a = 5 m/s²

Answer:

Jupiter Neptune moon Uranus

Explanation:

The gravitational potential energy of the pot plant before it begins to fall is 392 J.

The total mechanical energy of the pot plant after it has fallen two meters is 78.39 J.

The speed with which the pot plant hits the ground is 19.8 m/s.

The gravitational potential energy of the pot plant before it begins to fall is calculated as follows;

P.E = mgh

where;

P.E = (2 kg) (9.8 m/s²) (20)

P.E = 392 J

The total mechanical energy of the pot plant after it has fallen two meters is calculated as follows.

M.E = K.E + P.E

where;

M.E = ¹/₂mv² + mgh

M.E = ¹/₂(2 kg)(6.26 m/s)²  +  (2 kg)(9.8 m/s²)(2 m)

M.E = 78.39 J

The speed with which the pot plant hits the ground is calculated by applying the principle of conservation of energy as follows;

K.E(bottom) = P.E(up)

¹/₂mv² = mgh

v² = 2gh

v = √2gh

where;

v = √(2 x 9.8 x 20)

v = 19.8 m/s

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To test a Zener diode with a digital multimeter, follow these steps:

1. Turn off the power supply to the circuit.

2. Set your multimeter to the diode test mode. This is usually represented by a diode symbol on the multimeter dial.

3. Connect the black probe of the multimeter to the cathode end of the Zener diode and the red probe to the anode end of the diode.

4. Check the voltage reading on the multimeter. If the voltage reading is zero, the Zener diode is not conducting and is faulty. If the voltage reading is close to the Zener voltage rating, the Zener diode is good.

5. Reverse the probes and repeat the test. The voltage reading should be close to zero volts. If the voltage reading is still close to the Zener voltage rating, the Zener diode is faulty.

Note: Be sure to consult the datasheet of the Zener diode you are testing to ensure that you are using the correct voltage rating.

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Among the following options, Enterprise Resource Planning (ERP) is the type of ES frequently used to support operational procurement activities.

ERP or Enterprise Resource Planning is a software application that an organization uses to manage its business processes. It integrates various departments, such as finance, HR, inventory, and procurement, into a single system and streamlines communication between them. This assists firms in effectively utilizing resources and achieving their objectives.

ERP system is frequently used to support operational procurement activities because it can help in coordinating the purchasing process from start to finish. It also automates many activities such as generating purchase orders, tracking shipments, recording receipts, and paying invoices.

Thus, it can increase the efficiency and accuracy of procurement processes, reducing the need for manual intervention.

Therefore, the correct answer is A) ERP.

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Answer:

the work function of the metal is 4.167 x 10⁻¹⁹ J .

Explanation:

Given;

wavelength of the incident light, λ = 450 nm = 450 x 10⁻⁹ m

kinetic energy, K.E = 2.5 x 10⁻²⁰ J

The energy of the incident light is calculated as;

\(E = hf = \frac{h c}{\lambda} \\\\where;\\\\c \ is \ speed \ of \ light = 3 \times 10^8 \ m/s\\\\ h \ is \ Planck's constant = 6.626 \times 10^{-34} Js \\\\E = \frac{(6.626 \times 10^{-34})(3\times 10^8)}{450 \times 10^{-9}} \\\\E = 4.417 \times 10^{-19} \ J\)

Apply Einstein photoelectric equation to determine the work function of the metal;

E = W + K.E

where;

W is the work function of the metal

W = E - K.E

W = 4.417 x 10⁻¹⁹ J - 2.5 x 10⁻²⁰ J

W = 44.17 x 10⁻²⁰ J -  2.5 x 10⁻²⁰ J

W = 41.67 x 10⁻²⁰ J

W = 4.167 x 10⁻¹⁹ J

Therefore, the work function of the metal is 4.167 x 10⁻¹⁹ J .

The work function of the photon is 4.167*10^19J

The energy of this photon can be calculated as

E = hc/λ

Data given;

substituting the values into the equation;

\(E = hc / y\\E = \frac{6.626*10^-^3^4*3.0*10^8}{450*10^-^9} \\E = 4.42*10^-^1^9J\)

The work function of the photon can be calculated as;

E = K.E + Ф

4.42*10^-19 = 2.5*10^-20 + Ф

Ф = \(4.42*10^-^1^9 - 2.5*10^-^2^0=4.167*10^-^1^9J\)

The work function of the photon is 4.167*10^-19 J

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Answer:

Please find attached, the required wave drawn with MS Excel

Explanation:

Functions that represent waves is given as follows

A general form of the wave equation is A·sin(B·x) + D

Where;

B = 2·π/T

T = The period of the wave = 1/f

D = The vertical shift of the wave = 0

A = The amplitude of the wave = 1 for sine wave

v = The wave velocity

λ = The wavelength of the wave

f = The frequency of the wave

v = f·λ

At constant v, λ ∝ 1/f  

∴ λ ∝ T

Where T = 3, we have;

B = 2·π/T

∴ B = 2·π/3

Therefore, we have the wave with an amplitude of 1 cm, and wavelength, 3 cm, given as follows

y = sin((2·π/3)·x)

Plotting the above wave with MS Excel, we can get the attached wave

We are given that an object falls with an acceleration of -6 miles/h/s. To determine the initial velocity we will use the following motion:

Where:

Now, we solve for the initial velocity by subtracting "at" from both sides:

Now, we plug in the values:

Now, we solve the operations:

Therefore, the initial velocity is 50 mi/h.

Hot objects contain more energy and emit photons at higher frequencies and shorter wavelengths compared to cool objects. Cool objects appear redder in color than hot objects.

Hot objects have a higher internal energy compared to cool objects. This higher energy is manifested in the form of increased thermal motion of particles within the object. As a result, hot objects emit more energy in the form of photons.

When it comes to the emission of photons, hot objects emit more photons at higher frequencies and shorter wavelengths. This is because the energy of individual photons is directly proportional to their frequency. Hotter objects have more energetic particles, leading to the emission of photons with higher frequencies and shorter wavelengths.

On the other hand, cool objects emit fewer photons and at lower frequencies and longer wavelengths. The lower energy of the particles in cool objects results in the emission of photons with lower frequencies and longer wavelengths.

In terms of color appearance, cool objects appear redder than hot objects. This is because cooler objects emit more photons in the red part of the electromagnetic spectrum, while hotter objects emit more photons in the blue part of the spectrum.

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The types of microscopes that reveals the surface features of small molecules is an atomic force microscope.

The Atomic Force Microscope (AFM) is useful for imaging the surface topography of living, soft materials in their natural settings. It can be used to examine the inherent elastic modulus and receptor-ligand interactions of cells and extracellular matrix, among other mechanical properties. SEM pictures can investigate surface features that are several tenths of a nanometer in size, but AFM resolution is less than 0.1 nm. As a result, AFM can discern objects on flat surfaces with molecular dimensions.

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The new speed with respect to the ground is 512 m/h.

We can tell that is speed is the rate at which the velocity changes with respect to time. In this case, we can see that the jet airliner moving initially at 103 mph (with respect to the ground) to the east moves into a region where the wind is blowing at 441 mph in a direction 19° north of east.

Hence;

→ The east component =  103 + 441 cos(52) = 375 m/h

→ The north component = 441 sin(52) = 348  m/h

We can now get the new velocity by the use of;

√( 375)^2 + (348)^2 =

= 512 m/h

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Answer:

1525 meters above ground

Explanation:

So to do this you will need to write this in slope intercept form or \(y=mx+b\). So 650 would be the b, 175 would be the m, and the x would be 5 so the equation would be \(y=175(5)+650\) so if you solve or simplify the equation you will get 1525 meters above the ground and that would be our final answer.

Explanation:

the particles in liquids and gases move faster when they are heated than they do when they are cold. As a result, the particles take up more volume.

The natural length of the spring is 5 cm.

Given dataThe amount of work done to stretch a spring from 7 cm to 9 cm is 6 J.The amount of work done to stretch a spring from 9 cm to 11 cm is 10 J.

The formula for potential energy stored in a spring is

    U=12kx2

Here,

U is potential energy stored in a spring

k is a spring constantx is the displacement of the spring from its natural length

U = 12kx2

Thus, U is proportional to x2

For the first stretching, we have

U1 = 12k(0.02)2

For the second stretching, we have

U2 = 12k(0.02)2

The difference in the amount of work done to stretch a spring is proportional to the difference in the potential energy stored in the spring.

So,U2 - U1 = 10 J - 6 J= 4 J= 12k(0.02)2 - 12k(0.02)2= 12k(0.04)k = 4/3

The natural length of the spring is given by x0 = U/k

Here, U is the potential energy stored in a spring when stretched by x So, the natural length of the spring is

x0 = 12kx02x0 = 12(4/3)(0.05)2x0 = 5 cm

Therefore, the natural length of the spring is 5 cm.

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The approximate distance the paramecium will travel before stopping, if the acceleration of the paramecium were to stay constant as it came to rest, can be found using the kinematic equation.

A paramecium is a unicellular organism.

Given that:

Initial velocity, u = 0

Acceleration, a = - 2.5 µm/s²

Final velocity, v = 0

The distance traveled, s = ?

We can use the kinematic equation:

v² - u² = 2as

Plugging in the known values:

v² - u² = 2as

0² - 0² = 2(- 2.5) s0

= - 5s

Thus, the approximate distance the paramecium will travel before stopping, if the acceleration of the paramecium were to stay constant as it came to rest is 5 µm.

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Answer:

Lysosme

Explanation:

All plant cells have cell walls due to their ability to not protect themseleves unlike us humans or aniamls. Ribosomes and vacuoles also are in all plant cells as provide it with nutrients. Lysosme are not always commonly found in all plant cells because they have cell walls to proctect them. Hope this helps :)