(Plzzzz help!!!) (50 points!!!)
1. Write the following quantities in scientific notation:
(1) 10130 Pa to 2 decimal places
(2) 978,15 m·s−2
to one decimal place
(3) 0,000001256 A to 3 decimal places

One of the most important inventions of the last century is the transistor, which was invented in 1947 by John Bardeen, Walter Brattain, and William Shockley at Bell Labs.

Transistor revolutionized electronics and enabled the development of modern computer. Transistors are tiny semiconductor devices that can amplify and switch electronic signals, and they have been essential components in development of almost all electronic devices, from radios and televisions to smartphones and laptops. According to their design, transistors can be divided into two categories: bipolar junction transistors (BJT) and field effect transistors. (FET).

The basis of a transistor's operation is the ability to modulate the intensity of a smaller current that is flowing through a second channel, which controls the flow of current through one channel.

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Answer:

Pt 1: \(W=39J\)

Pt 2: θ = \(19.7\)

Explanation:

Part 1:

\(W=FS\)

\(W=F_{_xs_x}+F{_ys_y}\)

imagine the "i"and the "j" with the hat

\(W=(10i-1j)(4i+3j)\)

\(W=(10*4)-(1*1)\)

\(W=40-1\)

\(W=39J\)

Part 2:

\(|F|=\sqrt{10^2+(-1)^2}\)

\(|F|=\sqrt{101}\)

\(|S|=\sqrt{4^2+1^2}\)

\(|S|=\sqrt{17}\)

\(W=|F||S|cos\)θ

\(39=(\sqrt{101})(\sqrt{17} )cos\)θ

θ = \(19.7\)

Hope it helps

True,

molecular gastronomy was created by two scientists from Oxford University. Molecular gastronomy is a sub-discipline of food science that investigates the physical and chemical transformations of ingredients during cooking. It was first established by physicist Nicholas Kurti and chemist Hervé This, both from Oxford University. The term "molecular gastronomy" was coined in 1988 during a workshop on the science of cooking, which aimed to bridge the gap between scientific research and culinary arts.

Molecular gastronomy explores various aspects of food, such as flavor, texture, and presentation, and combines scientific knowledge with culinary techniques. This innovative approach to cooking has led to the creation of many unique and modern dishes, often featuring unexpected combinations of ingredients and visually appealing presentations.
The objective of molecular gastronomy is not only to create innovative dishes but also to understand and improve traditional cooking methods. This has led to advancements in food technology, as well as a deeper understanding of the science behind cooking processes. As a result, molecular gastronomy has become a popular and influential trend in the culinary world, inspiring chefs and home cooks alike to experiment with new techniques and ingredients.

In summary, molecular gastronomy was created by two scientists from Oxford University, Nicholas Kurti and Hervé This. Their groundbreaking work has had a significant impact on the culinary world and has led to many exciting innovations in food preparation and presentation.

Answer:

The higher the amplitude, the higher the energy.

Answer: \(933.76\ rad\)

Explanation:

Given

The initial rate of gyroscope is \(\omega_o=34\ rad/s\)

Angular deceleration \(\alpha =0.619\ rad/s^2\)

Using angular equation of motion

\(\Rightarrow \omega^2-\omega_o^2=2\alpha \theta\)

Insert the values

\(\Rightarrow 0-34^2=2(-0.619)\theta \\\\\Rightarrow \theta =\dfrac{34^2}{2\times 0.619}\\\\\Rightarrow \theta =933.76\ rad\)

Thus, the angular displacement is \(933.76\ rad\)

The box's kinetic energy is 845.2J when an 80.0 N box is pulled 20.0 m up a 30.0-degree ramp by a force of 115 N if the coefficient of kinetic friction between the box and the ramp is 0.22.

We know that,

the theorem states the relationship between work and energy. This theorem states that the change in kinetic energy is equal to the work

W = ΔKE = Force × displacement

Now given that,

Weight of the box, w = 80N

Length of the ramp, l = 20m

Angle, θ = 30⁰

Applied force on the box, F = 115N and

coefficient of the kinetic friction, μ = 0.22

first, we find the net force acting on the box

ΣF = Fsinθ - f

here, f is the frictional force

ΣF = Fsinθ - μwcosθ

or ΣF = 115(sin30°) - 0.22(80)cos30° = 115(0.5) - 17.6(0.86)

or ΣF = 42.26N

Now, by applying the work-energy theorem

W = ΣF×d = (42.26N)(20m) = 845.2J

Kinetic energy = 845.2J

Therefore, The box's kinetic energy is 845.2J when an 80.0 N box is pulled 20.0 m up a 30.0-degree ramp by a force of 115 N if the coefficient of kinetic friction between the box and the ramp is 0.22.

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The complete question is:

An 80.0 N box is pulled 20.0 m up a 30.0-degree ramp by a force of 115 N. If the coefficient of kinetic friction between the box and the ramp is 0.22, what is the box's kinetic energy?

The mass of a substance is not directly related to latent heat. Instead, latent heat is a parameter that describes the amount of energy required or released during a phase shift of a substance.

Latent heat can be thought of as hidden energy that is supplied or extracted to change the state of a substance without changing its temperature or pressure.

Latent heat is energy released or absorbed, by a body or a thermodynamic system, during a constant-temperature process—typically a first-order phase transition.

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So, the speed of the ball after 2 seconds after free fall is 20 m/s.

Hi ! I'm Deva from Brainly Indonesia. In this material, we can call this event "Free Fall Motion". There are two conditions for free fall motion, namely falling (from top to bottom) and free (without initial velocity). Because the question only asks for the final velocity of the ball, in fact, we may use the formula for the relationship between acceleration and change in velocity and time. In general, this relationship can be expressed in the following equation :

\( \boxed{\sf{\bold{a = \frac{v_2 - v_1}{t}}}} \)

With the following conditions :

We know that :

What was asked :

Step by step :

\( \sf{a = \frac{v_2 - v_1}{t}} \)

\( \sf{(a \times t) + v_1 = v_2} \)

\( \sf{(10 \times 2) + 0 = v_2} \)

\( \boxed{\sf{v_2 = 20 \: m/s}} \)

So, the speed of the ball after 2 seconds after free fall is 20 m/s.

Answer:

Theres no given?

Explanation:

Well, whatever.

I observed the shift of their sunset time.

Examples like:

January to June = their sunset time increased while

July to December = their sunset time decreased

Answer:

trachea

Explanation:

The trachea is one part of the respiratory tree that is a conduit for air to pass through on its way to or from the alveoli of the lungs. This transmits oxygen to the body and removes carbon dioxide.

Answer:

Increase the amplitude

Explanation:

The energy conveyed by a wave is directly proportional to the square of its amplitude. Thus; E ∝ A²

This means that increasing the amplitude will lead to an increase in the energy.

Now, the amplitude of a wave is the height of a wave from it's highest point known as the peak, to the lowest point on the wave known as the trough whereas wavelength refers to the length of a wave from one peak to the next.

This means that increasing the amplitude has no effect on the wavelength.

Answer and Explanation:

A well-coated structure is defined as having a coating that meets a certain standard of quality. The answer to this particular question depends on the specific criteria being used to evaluate the coating. This would typically require a coating coverage of 90% or better, if not higher.

However, in general, a well-coated structure would typically refer to a surface that has been thoroughly and evenly covered with a coating material such as paint or varnish. This ensures that the underlying material is protected from environmental factors such as moisture and UV radiation. In addition, a well-coated structure can also improve the overall appearance of the surface, making it more aesthetically pleasing. Regarding the options provided in the question, the answer would depend on the specific criteria being used to evaluate the coating. However, it is safe to say that a well-coated structure would require a high level of coating coverage, with minimal areas left uncovered or with an uneven application. This would typically require a coating coverage of 90% or better, if not higher. Ultimately, the specific answer would depend on the standards and expectations set by the evaluating body.

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A well-coated structure is defined as having a coating that meets a certain standard of quality. The answer to this particular question depends on the specific criteria being used to evaluate the coating. This would typically require a coating coverage of 90% or better, if not higher.

However, in general, a well-coated structure would typically refer to a surface that has been thoroughly and evenly covered with a coating material such as paint or varnish. This ensures that the underlying material is protected from environmental factors such as moisture and UV radiation. In addition, a well-coated structure can also improve the overall appearance of the surface, making it more aesthetically pleasing.

Regarding the options provided in the question, the answer would depend on the specific criteria being used to evaluate the coating. However, it is safe to say that a well-coated structure would require a high level of coating coverage, with minimal areas left uncovered or with an uneven application. This would typically require a coating coverage of 90% or better, if not higher. Ultimately, the specific answer would depend on the standards and expectations set by the evaluating body

Answer:

Star 1 2 hours

35

Explanation:

Answer:

the answer would be 35 degrees :))))

Explanation:

it was the correct on the quiz,,, good luckk :3!!

Answer:

Vf = Vi + at

t = Vf - Vi = 0.0m/s - 1.75 m/s

    --------- = ------------------------- = 8.8s

         a              -0.20 m/s(squared)

Explanation:

This is what I got I am pretty sure it's correct but correct me if I'm wrong : )

The distance travelled by toy car B using the same fully charged battery as car A is 875 m

E = fd

E = 35 × 2000

E = 70000 J

E = fd

70000 = 80 × Distance of car B

Divide both sides by 80

Distance of car B = 70000 / 80

Distance of car B = 875 m

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Answer:

We are Given:

initial velocity (u) = 0m/s

final velocity (v) = 25 m/s

time (t) = 10 seconds

acceleration (a)  = a m/s/s

From the first equation of motion, we know that:

v = u + at

solving for a, we get:

a = (v-u) / t

now, plugging the given values in this equation

a = (25 - 0) / 10

a = 25 / 10

a = 2.5 m/s/s

Therefore, the acceleration of the car is 2.5 m/s/s

The two strings are taut. When the system is released from rest, it accelerates at 2 m/s2 then, Mass of A = 8m/5 kg.

Let the mass of the body A be ‘m’.

The two strings are taut so they exert a tension ‘T’ on body A.

Let ‘a’ be the acceleration produced in the system.

The free body diagram of body A is given below: mA + 2T = mA + ma = mA + m(2)mA + 10T = mA + ma = mA + m(2)

As the two strings are taut, we can say that tension in both strings is equal.

Therefore 2T = 10T or T = 5T As the body A is resting on a smooth horizontal table, there is no friction force acting on the body A.

The net force acting on body A is the force due to tension in the strings. ma = 2T – mg …(1)

As per the given problem, the system is released from rest.

Hence the initial velocity is zero.

Also, we are given that the system accelerates at 2 m/s2.

Therefore a = 2 m/s2 …(2)

From the equations (1) and (2), we get, m(2) = 2T – mg …(3)⇒ m(2) = 2×5m – mg⇒ 2m = 10m – g⇒ g = 8m/5

Thus, the mass of A is 8m/5 kg.

Answer: Mass of A = 8m/5 kg.

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Stochastic impacts of radiation allude to those that happen arbitrarily and are not reliant upon the portion got. These impacts are related to the likelihood of events and incorporate disease and hereditary changes. Non-stochastic impacts, then again, have a limit, and their seriousness increments with expanding portions.

Models incorporate radiation consumption and intense radiation conditions. Understanding the qualification among stochastic and non-stochastic impacts of radiation is significant in fields like radiation security, atomic medication, and radiobiology.

It assists in setting radiation with dosing limits, creating well-being rules, and carrying out suitable radiation safeguarding measures. By separating these impacts, experts can evaluate and deal with the dangers related to openness to ionizing radiation all the more successfully.

This information guides choices in regard to radiation wellbeing conventions, word-related openness limits, and the improvement of radiation therapy systems in medication.

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The energy that is required by the space probe is 2.94 * 10^14 J.

Let us recall that the gravitational potential energy is the energy that is possessed by a body by virtue of the position of the body in space. We know that the energy that is possessed by the space probe is the gravitational potential energy and we have to obtain the energy required.

Recall that energy required = Work done = mgh

m = mass of the object

g = acceleration due to gravity

h = distance covered

Then;

100-kg * 9.8 m/s^2 *  3 × 10^11 m

= 2.94 * 10^14 J

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Newton's second law allows finding the result for the comparison of the rise and fall times of the block on the ramp is:

Newton's second law establishes a relationship between the net force, the masses and the acceleration of the bodies.  

         ∑ F = m a

Where the bold letters indicate vectors, F is the force, m the mass and the acceleration of the body.

The reference system is a coordinate system with respect to which the forces are drawn, in the attached we can see a free body diagram of the block going up and down the ramp, in this case the x axis is parallel to the ramp and the y axis it is perpendicular.

Let's use trigonometry to find the components of weight.

         sin θ = \(\frac{W_x}{W}\)  

         cos θ = \(\frac{W_y}{W}\)  

         Wₓ = W sin θ

          \(W_y\) = W cos θ

Let's write Newton's second law for each axis.

Case 1. block slides down.

x- axis

         Wₓ = ma

         mg sin θ = ma

         a = g sin θ

Case 2. block rises

X axis

         - Wₓ = m a

         - m gsin θ = a

          a = - g sin θ

We can see that the acceleration is the same in two two cases, if the block has the same initial speed, the rise and fall time is the same.

           y = v₀ t - ½ a t²

            y = ½ a t²

In conclusion using Newton's second law we can find the result for the comparison of the rise and fall times of the block on the ramp is:

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The investigation" Place soil in the bottom of a container and water on top, place it in the sun, and measure the temperature of the container" will help them make this comparison.

A starting point for conducting a comparative analysis is to fill a container with soil followed by pouring water on top.

The next step involves placing it under sun rays while simultaneously recording its temperature. Post that, we need to separate the sand from water to rapidly gauge any change in temperature.

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Complete question:

A science teacher asks her class to compare the way in which heat is transferred to water in a pond as opposed to the soil at the edge of the pond. Which of the following investigations will help them make this comparison?

a. Mix water and soil in a container, place it in the sun, and measure the temperature of the container.

b. Place soil and water in separate containers, place them indoors, and monitor the temperature of the containers.

c. Place soil and water in separate containers, place them in the sun, and monitor the temperatures of each container.

d. Place soil in the bottom of a container and water on top, place it in the sun, and measure the temperature of the container.

The deflection will be toward the backside for bad cost and closer to the pinnacle of the spread page for the high-quality charge.

Charged particles are simply defined as particles with an electric charge on them. This may sometimes result in being an ion, as a molecule with excess or a reduced amount of electrons relative to protons.

Generally, the Magnetic area points internal the airplane so through fleming left hand rule is

F = q ( V x B). Ie

hence

qVB = qE

V= E/B then no deflection.

V > E/B then magnetic pressure is dominant over electric powered force.

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The change in momentum of Kara's car is -1.43 × 10⁴ kg.m/s, the magnitude of force is -1.021 × 10⁵ N.

Force is the external agent which causes the motion of an object or it is the resistant which makes the object come at rest from motion. It is a vector quantity, because it has both the magnitude and direction.

Mass of Kara's car = 1300 Kg

moving with speed = 11 m/s

time taken to stop = 0.14 s

final velocity = 0 m/s

distance between Lisa ford and Kara's car = 30 m

a) change in momentum of Kara's car

Δ P = m Δ v          

Δ P = m(vf - vi)

Δ P = 1300 (0 - 11)

Δ P = -1.43 × 10⁴ kg.m/s

The impulse is equal to the change in momentum of the car

I = -1.43 × 10⁴ kg.m/s

Magnitude of the force experienced by Kara

I = F × t

where, I is impulse acting on the car

t is time

- 1.43 × 10⁴ = F × 0.14

F = -1.021 × 10⁵ N

Negative sign represents the direction of the force.

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Your question is incomplete, most probably the complete question is:

Kara Less was applying her makeup when she drove into South's busy parking lot last Friday morning. Unaware that Lisa Ford was stopped in her lane 30 feet ahead, Kara rear-ended Lisa's rented Taurus. Kara's 1300-kg car was moving at 11 m/s and stopped in 0.14 seconds.

a. Determine the momentum change of Kara's car.

b. Determine the impulse experienced by Kara's car.

c. Determine the magnitude of the force experienced by Kara's car.

It is not desirable to have large areas of forest plants replaced by oil palms because animals and plants may be affected in regions of fragmented habitat, which is an important issue in ecosystem disturbance and loss of biodiversity.

Ecosystem disturbance is an ecological concept that makes reference to the different human activities and natural processes (such as earthquake catastrophes) that are to break the delicate internal homeostatic equilibrium of the ecosystems. Moreover, loss of biodiversity refers to the loss of variation due to the extinction of populations and even species.

Therefore, with this data, we can see that ecosystem disturbance and loss of biodiversity are fundamental processes and they have been associated with the process of replacement of native trees in natural forests with oil palms, which have negative outcomes for the surrounding environment.

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Two things that keep windows from shattering are the strength of the glass and the ability of the window frame to dampen vibrations.

The strength of the glass is important because it determines how much force the glass can withstand before it breaks. Modern windows are typically made of tempered glass, which is treated with heat to make it stronger and more resistant to shattering.

The ability of the window frame to dampen vibrations is also crucial because glass is prone to resonance, which is a phenomenon that occurs when an object is subjected to vibration at its natural frequency.

If the frequency of the vibration matches the natural frequency of the glass, the glass can begin to vibrate and eventually shatter. To prevent this, window frames are designed to be sturdy and to dampen vibrations, which helps to prevent the glass from vibrating and shattering.

In summary, both the strength of the glass and the ability of the window frame to dampen vibrations are important factors that help to prevent windows from shattering.

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Answer:

The answer is B since no one answered it :)

Explanation:

Answer:

b

Explanation:

i took the test

Answer:

the answer to this is letter b

Answer:

B) Technology helps scientists study things that are very small, far away, or hard to reach.

The temperature reading in Fahrenheit scale when reading 310 K is  98.6F

Temperature is the degree of hotness or coldness of the object.

Given is a temperature in Kelvin scale = 310 K

Temperature on centigrade scale = 310 -273 = 37°C

Temperature conversion from Centigrade to Fahrenheit is

C/5 = F -32/9

Plug the value, we get

37/5 = F-32/9

66.6 = F -32

F = 32+66.6 =

F = 98.6

Thus, the temperature of 310 K in Fahrenheit is 98.6F.

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Answer:

Explanation:

We can calculate the change in the man's center of gravity by considering the initial and final positions of the center of gravity of his arms.

Assuming the man's arms are initially hanging down by his sides, the center of gravity of his arms is located at the midpoint of the cylinder, which is at a distance of L/2 = 79/2 = 39.5 cm from the shoulder joint.

When the man raises his arms straight up, the center of gravity of his arms is located at the top of the cylinder, which is at a distance of L = 79 cm from the shoulder joint.

The change in the man's center of gravity is therefore:

Δh = h_final - h_initial

= L - L/2

= 79 cm - 39.5 cm

= 39.5 cm

Therefore, the man raises his center of gravity by 39.5 cm when he raises both his arms from hanging down to straight up.