An object is being dragged across a flat level surface using a rope that is applying a constant 43.9 lb force to the side of the object at an angle that is 27.0 degrees above the horizontal. If this force is used to drag the object through a displacement of 26.8 ft, then how much work was done by this force in ftlb?

(a) Expression for image distance: 1/f = 1/d_o + 1/d_i. (b) Numerically, the image distance is 6.3 cm when the object is located 15.5 cm in front of a concave mirror with f = 10.5 cm.

For a concave mirror, the relationship between the object distance (d_o), image distance (d_i), and focal length (f) can be expressed using the mirror equation: 1/f = 1/d_o + 1/d_i. In this scenario, the object is located at a distance of 15.5 cm in front of the concave mirror, and the focal length is given as 10.5 cm. By substituting the known values into the equation, we can solve for the image distance. Rearranging the equation, we get 1/d_i = 1/f - 1/d_o. Plugging in the values, we find 1/d_i = 1/10.5 cm - 1/15.5 cm. Calculating this expression gives us 1/d_i ≈ 0.0952 cm^(-1). Taking the reciprocal of both sides, we find d_i ≈ 10.5 cm. Thus, numerically, the image distance is approximately 6.3 cm.

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If the density of water does not vary and the vents range in depth from about 1500 m to 3200 m below the surface, then the gauge pressure at a 2452-m deep vent is 224.268 atm.

Calculation:

Step-1:

It is given that the vents range in depth from about 1500 m to 3200 m below the surface. If we are assuming that the density of water does not vary. Then it is required to calculate the gauge pressure at a 2452-m deep vent.

The gauge pressure at a particular depth of ocean water is calculated as:

\($$P=\rho g h$$\)

Here \(\rho\) is the density of water, P is the required pressure, h is the depth of water, and g is the gravitational acceleration.

Step-2:

Now we are substituting the values to calculate the pressure at the depth of 2452-m.

\($$\\\begin{aligned}\\P&=\rho gh\\&=1030 (\text{ kg/m}^3)\times 9.8 (\text{ m/s}^2)\times 2452 \text{ m}\\&=24.75\times 10^6 \text{ Pa}\times\frac{1 \text{ atm}}{10.1325 \times10^4 \text{ Pa}}\\&=224.268 \text{ atm}\\\end{aligned}\\$$\)

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The most common injury related to electrical hazards are Electrical burns.

What are electrical hazards?

An electrical burn is a type of skin burn that develops when your body comes into contact with electricity. It is possible for electricity to pass through your body when it comes into contact with it. When this occurs, the voltage has the potential to harm tissues and organs.

Hence, The most common injury related to electrical hazards are Electrical burns.

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Answer:   Natural stone

Explanation:

Answer:

Natural stone

Explanation:

The most common natural stones used to make countertops include granite, marble, soapstone, and slate.

The minimum energy input necessary to place this satellite in orbit is

\(\frac{1}{2} m(v^{2} - v_{e} ^{2} ) +GM_{E} m(\frac{1}{r} -\frac{1}{R_{E} } )\)

The mass of the satellite = m

Altitude = h = r

The radius of the Earth = \(R_{E}\)

The Mass of the Earth = \(M_{E}\)

Speed of the satellite = v

Speed of the Earth = \(v_{e}\)

Gravitational Constant = G

The energy at the surface of the Earth will be the sum of the kinetic and potential Energy,

So,

\(E_{i} = K.E. +P.E.\\\\ E_{i} = \frac{1}{2} mv_{e} ^{2} -\frac{GM_{E} m}{r}\)

Also, Energy in orbit,

\(E_{i} = K.E. +P.E.\\\\ E_{i} = \frac{1}{2} mv^{2} -\frac{GM_{E} m}{R_{E} }\)

Now, The change in energy is the minimum energy required to place this satellite in orbit,

Then, the Change in Energy =

∆E \(= \frac{1}{2} m(v^{2} - v_{e} ^{2} ) +GM_{E} m(\frac{1}{r} -\frac{1}{R_{E} } )\)

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a) There are 0.23 seconds in which the ball is in the air.

b) 11.74 meters per second is the ball's initial horizontal speed.

A body's velocity is defined as the rate at which its displacement alters over time. Having both magnitude and direction, velocity is a vector quantity.

A body's velocity is defined as the rate at which its displacement alters over time.

The point is 1.0 meters tall vertically.

The ball rolled across a horizontal distance of 2.7 meters.

(H/2g) is the length of time the ball has been in the air.

= √(1.0/2×9.8)

is 0.23 seconds

b) The ball travels at an initial horizontal velocity of = 2.7 m/0.23 s.

= 11.74 m/s.

a) There are 0.23 seconds in which the ball is in the air.

b) 11.74 meters per second is the ball's initial horizontal speed.

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Answer:

383.2

Explanation:

W=m×g(9.8)×(change in height)

=3×9.8× (45-32)

=3×9.8×13

=383.2

Answer:

an open circuit (A battery, bulb, wire,switch)

Explanation:

the battery supplies the power the wire carries the current from the battery to the bulb but the circuit is not completed if the switch is not connected (Switch )

The reason why a delivery truck filled with birds sitting on the floor be heavier than a truck with the same birds flying around is because when the birds are sitting on the floor, they are adding their weight to the truck.

Meanwhile, if the birds are flying around they aren't resting on the truck or touching it, so therefore their weight wouldn't be added to the truck.

The mass of the truck will remain the same as you cannot change the mass but the weight will vary depending on the items and objects placed in it.

Answer:

anodizing and chrome planting

Explanation:

they prevent corrosion

Answer:

I don't know I'm sorry I will tell you another answer asks me

Answer:

a is constant., v is increasing.

Explanation:

F = ma

F and m are both constant, so a is constant.

v = at, t is increasing, so v is increasing.

The velocity of the object will be equal to numerical multiplication of acceleration and time while  the acceleration of the body is the total applied force divided by mass of the object.

An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude. The application of force is the location at which force is applied, and the direction in which the force is applied is known as the direction of the force.

A spring balance can be used to calculate the force. Newton(N) is the SI unit of force.

For applying nonzero force, the object will come in motion.

Let, the mass of the body = m.

Force applied on it = F.

Acceleration of the body = a.

And after time t, the velocity of the object become v.

From Newton's 2nd law of motion, we can write,

Applied force = mass × acceleration.

⇒ F = ma

⇒ a = F/m.

And, final velocity will be = acceleration × time = at

Hence, the acceleration of the body is the total applied force divided by mass of the object and velocity of the object after some time will be equal to numerical multiplication of acceleration and time.

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Answer:

u can use a calculator to answer that question thats ur only hint

Explanation:

Answer:

The gases which are very good at absorbing long wave photons of infrared gas.

Explanation:

Answer:

what are the results? Also

Explanation:

The distribution of touch receptors in human skin is not consistent over the body. In humans, touch receptors are less dense in skin covered with any type of hair, such as the arms, legs, torso, and face.  If two points are felt as two separate points, each is in the receptive field of two separate sensory receptors.

Answer:

it is important to reduce noise because it makes noise pollution which is not good for the people and animles

Explanation:

The correct option is A) be especially suitable

A red-dyed-water-in-glass thermometer would be especially suitable to measure temperatures between 0 degrees Celsius and 8 degrees Celsius. This is within the typical range for which such thermometers are designed to provide accurate readings. The red dye helps in reading the temperature by making the liquid column easier to see against the background.

This is because the freezing point of water is 0 degrees C, and the boiling point is 100 degrees C. The range of 0 to 8 degrees C falls within the temperature range that can be accurately measured using a red-dyed-water-in-glass thermometer. This type of thermometer works by measuring the expansion or contraction of a liquid (in this case, water) in response to changes in temperature. The liquid expands as it gets warmer and contracts as it gets cooler.

However, it is worth noting that red-dyed-water-in-glass thermometers are not always the most accurate or precise instruments for measuring temperature, particularly at extreme temperatures or when high accuracy is required. Other types of thermometers, such as digital thermometers or thermocouples, may be more appropriate in certain situations.

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It will take 8.9 seconds before Lilly coasts to a stop.

A measure of the degree of friction between two surfaces is the coefficient of friction. A coefficient of friction is determined by calculating the resistance to motion at the intersection of two surfaces made of the same or different materials.

In the question we are given,

Mass, m = 45 kg

initial speed, u = 7 m/s

final speed, v = 0

coefficient of friction, μ = 0.08

Now, friction force can be calculated by

F = Normal force × μ

F = mg×μ

F = 45×9.8×0.08

F = 35.2 N

since the net force is the frictional force we can calculate the deceleration,

F = ma

35.2 = 45a

a = 35.2/45 = 0.78 m/s²

by applying equation of motion,

v = u + at

0 = 7 - 0.78t

7 = 0.78t

t = 8.9 s

It will take 8.9 seconds before Lilly coasts to a stop.

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The complete question is;

Lilly, whos mass is 45.0 kg, is ice skating with a constant speed of 7.00 m/s when she hits a rough patch of ice with a coefficient of friction of 0.0800. How long will it take before Lilly coasts to a stop?

Answer:

Explanation:

perfect drawing

Answer: The force of attraction between the sun and earth is called gravity

Explanation:

Gravity is the force of attraction between two objects that is proportional to their masses and the distance between them. It is the force that keeps the Earth and other celestial bodies in orbit around the Sun, and it is also responsible for holding the Moon in orbit around the Earth. Newton's law of universal gravitation states that the force of gravity between two objects is proportional to the product of their masses and inversely proportional to the square of the distance between them. This means that the larger the masses of two objects and the closer they are to each other, the stronger the force of gravity between them will be. The force of gravity is a fundamental force in the universe, and it plays a crucial role in shaping the motion and structure of celestial bodies.

Answer:

Universal Gravitation

Explanation:

The gravitational force of attraction between Earth and the sun is 1.6 1023 N  

Not super sure what kind of answer you needed so here's both!

The horizontal distance travelled by the football is 3.1 m.

The angle of projection of the football is calculated as follows;

tan ( θ ) = Vy / Vx

where;

tan ( θ ) = 5 / 3

tan ( θ ) = 1.667

θ = arc tan (1.667)

θ = 59⁰

The resultant velocity of the ball is calculated as follows;

v = √ (Vx² + Vy²)

v = √ (3² + 5²)

v = 5.83 m/s

The horizontal distance travelled by the football is calculated as follows;

x = v² sin(2θ) /g

where;

x = [ (5.83)² sin(2 x 59) /9.8 ]

x = 3.1 m

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Here’s the answer buddy!

What is a unit?

A unit is an individual thing or person regarded as single and complete but which can also form an individual component of a larger or more complex whole.

Define SI system?

The International System of Units is the modern form of the metric system. It is the only system of measurement with an official status in nearly every country in the world.

What is the advantage of using SI system?

The greatest advantage of SI is that it has only one unit for each quantity (type of measurement). This means that it is never necessary to convert from one unit to another (within the system) and there are no conversion factors for students to memorize. For example, the one and only SI unit of length is the metre (m).

Answer:

C. All cells have identical genetic information.

Answer:

A and C

Explanation:

The coefficient of friction between the soap and the tub is 0.1.

The coefficient of static friction is the ratio of the maximum static friction force between the surfaces in contact before movement commences to the normal force.

Mathematically, the coefficient of static friction is given as;

μ = F/N

where;

Before an object start moving, the static friction must be overcame since it resists the motion of the object.

The normal force on the soap is the vertical downward force on the soap applied by Alan, N = 500 N

The force of friction on the soap, F = 50 N

μ = F/N

μ = 50 / 500

μ =  0.1

Thus, the coefficient of friction increases with increase in the horizontal force of friction and decrease in the normal force on the object.

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Answer:

True

Explanation:

Volcanically-caused long period earthquakes are produced by vibrations generated by the movement of magma or other fluids within the volcano. Pressure within the system increases and the surrounding rock fails, creating small earthquakes.

Photographic plates and charge-coupled devices (CCDs) are two different technologies used for capturing images in astronomy.

Photographic plates are glass or plastic sheets coated with light-sensitive chemicals. They were widely used before the advent of digital imaging. When exposed to light, the chemicals on the plate undergo a chemical reaction, producing a latent image.

The plate needs to be chemically developed to make the image visible. Photographic plates have a long history in astronomy and were the primary method of image capture for many decades.

On the other hand, charge-coupled devices (CCDs) are electronic sensors used in digital imaging. They consist of an array of tiny light-sensitive pixels that convert incoming light into electrical charge. The charge is then read out and converted into digital data.

CCDs offer several advantages over photographic plates, including higher sensitivity, wider dynamic range, faster data acquisition, and the ability to store and transmit images digitally. These characteristics make CCDs more efficient and practical for modern astronomical observations.

The Hubble Space Telescope (HST) holds tremendous importance in the field of astronomy. Launched in 1990, the HST has provided unprecedented views of the universe, free from the distortions caused by Earth's atmosphere. Its location above the atmosphere allows it to observe celestial objects with exceptional clarity and detail.

The HST has made numerous groundbreaking discoveries, including precise measurements of the expansion rate of the universe, the detection of planets around other stars, and the identification of distant galaxies that formed shortly after the Big Bang.

Moreover, the HST has revolutionized our understanding of the cosmos through its stunning images, capturing the beauty and complexity of celestial objects like galaxies, nebulas, and star clusters. It has enabled scientists to study the life cycles of stars, investigate the properties of black holes, and explore the mysteries of dark matter and dark energy.

The HST's contributions to astronomy have shaped our knowledge of the universe and inspired generations of scientists and the general public alike. Its observations continue to push the boundaries of our understanding and pave the way for future space telescopes and missions.

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(a) The lens is a converging lens.

(b) Its power is +6.06 diopters.

(a) When the sunlight focuses at a point behind the lens, it indicates that the lens is a converging lens. Converging lenses have a thicker center and are capable of converging parallel rays of light to a focal point.

(b) To determine the power of the lens, we can use the lens formula:

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

where f is the focal length of the lens, v is the image distance, and u is the object distance. In this case, the image distance is given as v = -16.5 cm (negative sign indicates that the image is formed on the opposite side of the object) and the object distance (u) is usually assumed to be large for most practical purposes.

Since we know that the focal length (f) is related to the power (P) of the lens as P = 1/f (in diopters), we can rearrange the lens formula as:

1/f = 1/v,

Substituting the values, we get:

1/f = 1/(-16.5 cm).

Solving for f, we find:

f = -16.5 cm.

Therefore, the power of the lens is +6.06 diopters (since P = 1/f). The positive sign indicates that the lens is a converging lens.

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To determine the magnetomotive force (mmf) across the center leg air gap when the winding current of question 3 flows in the winding, we need more information. Specifically, we need the value of the winding current in amperes. Once we have that information, we can calculate the mmf across the center leg air gap.

To calculate the magnetomotive force (mmf) across the center leg air gap when the winding current of question 3 flows, we require the value of the winding current in amperes. The mmf is directly proportional to the current passing through the winding. With this information, we can accurately determine the mmf.

However, without the specific value of the winding current, we cannot provide an exact answer. It is crucial to obtain the precise current value to calculate the mmf accurately. Once the current is known, the mmf can be expressed in amperes with the specified accuracy of ±0.5%. It is recommended to consult the relevant data or measurements to determine the actual value of the winding current and subsequently calculate the mmf across the center leg air gap.

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Answer:

12 N

Explanation:

Given,

Mass ( m ) = 3 kg

Acceleration ( a ) = 4 m/s^2

To find : Force ( F ) = ?

Formula : -

F = ma

F

= 3 x 4

= 12 N

Therefore, the force acting on the object is 12 N.

Answer: 12 N

Explanation: