the speed of sound increases by about 0.4 m/s for each degree celsius when the air temperature rises. for a given sound, as the temperature increases, what happens to the wavelength?

Answer:

The earliest goalie masks used were made from Fiberglass.

Explanation:

Hope that helps

Have a good day

Answer:

A path for electricity is current

Don't let yesterday take up too much of today.

Explanation:

20km / 50km/h = 0.4h = 24mins

Answer:

86.73 kg

Explanation:

Remember that F=mg

Let's plugin our numbers

850N=m9.8m/s^2

850N=9.8m/s^2m

86.73=m

Answer:

The kinetic energy of an object depends on both its mass and its speed. Kinetic energy increased as mass and speed are increased. An objects gravitational potential energy depends on its weight and on its height relative to a reference point.

The filament's diameter will be reduced by 9.1% when an old light bulb draws only 52.3 W instead of its original 60.0 W due to evaporative thinning of its filament.

When an old light bulb draws only 52.3 W instead of its original 60.0 W, the reason behind it is due to evaporative thinning of its filament. To calculate the factor by which the diameter of the filament is reduced, we will use the following formula; W α (diameter)2Lwhere, W = Power, L = Length, and α is a constant.The constant α is independent of the diameter of the filament. Therefore, \frac{W 1}{ W 2} =\frac{ (\frac{diameter 1 }{ diameter 2} )2L1 }{ L2}. Here, W1 = 60.0 W (original power of the light bulb), W2 = 52.3 W (new power), and L1 = L2 (uniform thinning of the filament).Now, we can find the diameter of the filament using the following formula;diameter 2 = diameter 1 sqrt{(\frac{W1 }{ W2} )}= diameter 1 sqrt{(\frac{60.0 }{ 52.3})}.This formula helps to find the diameter of the filament when the power of the light bulb is reduced due to evaporative thinning of its filament.The new diameter of the filament will be; Diameter 2 = 0.909 Diameter 1Therefore, the diameter of the filament has been reduced by 9.1% (approximately 0.909 times of its original diameter).

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Answer:

Answer:

d

Explanation:

i looked it up

Density is a physical property and is measured in a wide variety of units. However, the most suitable measurement unit for density is the kg/m³. The formula to measure the density of an object is given byd = m/VWhere d represents density, m represents mass, and V represents volume.

The units of density will depend on the units of mass and volume. For example, if the mass is measured in kilograms and the volume is measured in cubic meters, the density will be measured in kilograms per cubic meter (kg/m³). The kg/m³ measurement is the most suitable for density because it gives the mass of an object per unit of volume in a standardized form.

In general, density is expressed in terms of mass per unit volume and the SI units of mass and volume are kilograms and cubic meters, respectively. Therefore, the appropriate measurement unit for density is kg/m³.

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When water evaporates off of an object, the object tends to become cooler. This is because evaporation is an endothermic process, meaning it requires heat energy to occur.

As water molecules gain enough energy to escape from the surface of the object and enter the gas phase, they take away some heat energy from the object. This results in a decrease in the average kinetic energy of the remaining molecules on the object's surface, leading to a cooling effect.

The cooling effect of evaporation is commonly observed in everyday life. For example, when you sweat, the moisture on your skin evaporates, taking away heat energy from your body and providing a cooling sensation. Similarly, the evaporation of water from a wet surface, such as a wet cloth or a puddle, can make the surface feel cooler.

In summary, when water evaporates off of an object, the object typically becomes cooler due to the energy loss during the evaporation process.

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Answer:

As arrows

Explanation:

In a free body diagram, the object is treated as a dot and the force is depicted as arrows either moving way from the dot or moving towards the dot.

Answer:

Displacement

Explanation:

Displacement is a term used to represent change in position.

Answer:

Explanation:

I think that you to run more than 12 miles

The electric force acting on the electron is \(< 0, 0, 2.88e-14 > N\), and the electric field in this region responsible for the electric force is \(< 0, 0, -1.8e5 > N/C\). The presence of this electric field balances the magnetic force, allowing the electron to continue moving in a straight line at a constant speed.

The magnetic force on an electron can be calculated using the formula F = q(v x B), where F is the magnetic force, q is the charge of the electron, v is the velocity of the electron, and B is the magnetic field.

Given the velocity of the electron, v = < 2e5, 0, 0 > m/s, and the magnetic field, B = < 0, 0.9, 0 > T, we can compute the magnetic force as follows:

1. Calculate the cross product of v and B:

v x B

\(= < 2e5, 0, 0 > x < 0, 0.9, 0 >\)

\(= < 0, 0, -0.9 \times 2e5 >\)

2. Multiply the charge of an electron (q = -1.6e-19 C) with the cross product:
F = q(v x B)

\(= -1.6e-19 \times < 0, 0, -0.9 \times2e5 >\)

\(= < 0, 0, 2.88e-14 > N\)
So, the magnetic force on the electron is \(< 0, 0, 2.88e-14 > N\).

The electron continues to travel in a straight line at a constant speed, which indicates that there must be another force acting on it to counterbalance the magnetic force. This force is the electric force. The electric force can be calculated as F = qE, where E is the electric field.

To find the electric force, we can set the magnetic force equal to the electric force:
\(< 0, 0, 2.88e-14 > N\)

\(= -1.6e-19 \times E\)

Now we can find the electric field E:
E = \(< 0, 0, 2.88e-14 / -1.6e-19 >\)

\(= < 0, 0, -1.8e5 > N/C\)

Therefore, the electric force acting on the electron is \(< 0, 0, 2.88e-14 > N\), and the electric field in this region responsible for the electric force is \(< 0, 0, -1.8e5 > N/C.\)

The presence of this electric field balances the magnetic force, allowing the electron to continue moving in a straight line at a constant speed.

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Answer:

The box gains 3200 J of kinect energy.

Explanation:

Kinect energy is the energy of an object has because of its motion. Almost anything that has mass and it's in motion has kinect energy. Examples:

Also known as the principle of work and kinect energy, it states that the work done by all forces acting upon an object equals the change of its kinect energy.

For example, if you pull a box, then you're exerting a force on it and it moves forward. Since the box has mass and it's in motion, you have changed its kinect energy.

Solution:

Write the data down:

\(\bullet \quad \mathsf{m=50\,kg}\\\\\bullet \quad \mathsf{F=400\,N}\\\\\bullet \quad \mathsf{d=8\,m}\)

Apply work energy theorem:

\(\mathsf{W}= \Delta\mathsf{K}\)

The amount work done equals the change of kinect energy:

\(\mathsf{W}=\mathsf{K-K_o}\)

Since the block is at rest at the beginning, so it has zero initial kinect energy:

\(\mathsf{W}=\mathsf{K-0}\\\\\\\mathsf{W}=\mathsf{K}\)

Now, apply the formula for work to the left hand side of the equation:

\(\mathsf{F\cdot d}=\mathsf{K}\\\\\\\mathsf{400\cdot 8}=\mathsf{K}\\\\\\\therefore \boxed{\mathsf{K=3200\,J}}\)

Conclusion: the box has gained 3200 J of kinect energy.

Happy studying!

Brainly Team

Answer:

Explanation:

is this marked??

(a). The car's average velocity between t = 1.0s to t = 1.5s will be - \(1\;m/s\)

(b). The car's acceleration at t = 1.5s will be - \(0.4\;m/s^{2}\)

(c). Car's speed is increasing with time.

We have a a remote controlled toy car that starts from rest and begins to accelerate in a straight line.

We have to determine -

        t = 1.0 s  to  t = 1.5 s.

The rate of change of velocity with respect to time is called Acceleration. Mathematically -

\($a=\frac{dv}{dt}\)

According to the question, we have the following data for the Car -

t = 0s → x = 0m

t = 0.5s → x = 0.1m

t = 1.0s → x = 0.4m

t = 1.5s → x = 0.9m

t = 2.0s → x = 1.6m

PART - A

The car's average velocity between t = 1.0s to t = 1.5s will be -

\($v_{avg} = \frac{0.9-0.4}{1.5-1}= 1 m/s\)

PART - B

Velocity at t = 1.5 s will be -

\($v(1.5)=\frac{0.9}{1.5}= 0.6\;m/s\)

The car's acceleration at t = 1.5s will be -

\($a(1.5) = \frac{v}{t} = \frac{0.6}{1.5} = 0.4\;m/s^{2}\)

PART - C

Since, the acceleration of the car is positive, this means that the car is accelerating in the forward direction. Hence, its speed is increasing with time.

[ The following data was missing in your answer. The complete question would include this data also -

t = 0s → x = 0m

t = 0.5s → x = 0.1m

t = 1.0s → x = 0.4m

t = 1.5s → x = 0.9m

t = 2.0s → x = 1.6m ]

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The velocity potential function in a two-dimensional flow field is given by ϕ = x^2 - y^2. To find the magnitude of velocity at point P (1, 1), we need to compute the gradient of the function, which represents the velocity vector.

To find the magnitude of velocity at point P (1, 1) in a two-dimensional flow field, we first need to differentiate the given velocity potential function ϕ with respect to x and y to obtain the x- and y-components of velocity, respectively.

∂ϕ/∂x = 2x
∂ϕ/∂y = -2y

Then, we can use the following equation to find the magnitude of velocity at point P:

|V| = √(u^2 + v^2)

where u and v are the x- and y-components of velocity at point P, respectively.

Substituting the values of x and y for point P (1, 1), we get:

u = 2(1) = 2
v = -2(1) = -2

Therefore,

|V| = √(2^2 + (-2)^2) = √8 = 2√2

Hence, the magnitude of velocity at point P (1, 1) in the given two-dimensional flow field is 2√2.

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Explanation:

A resistor is 'Ohmic' if as voltage across the resistor is increased, a graph of voltage versus current shows a straight line.

Use the work formula:

W = Fd

Replacing we have:

W = 1 N * 1 m

Resolving operation:

W = 1 J

The work efectuated is 1 Joule.

The light reactions of photosynthesis are said to be similar to a battery because they form a current, the electrons would flow in this circuit as follows

H2O → Photosystem II → electron transport chain → Photosystem I → electron transport chain → NADPH

A chemical reaction is a process in which one or more substances, also known as reactants are converted to one or more different substances, known as products. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.

Since photosynthesis generates a current, it is considered to be akin to a battery; in this circuit, the electrons would flow as follows.

H2O → Photosystem II → electron transport chain → Photosystem I → electron transport chain → NADPH

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The advantages and disadvantages may vary depending on the specific application, material, and the expertise of the personnel conducting the magnetic particle testing.

Advantages of using the magnetic particle method of defect detection:

Sensitivity to Surface and Near-Surface Defects: Magnetic particle testing is highly sensitive to surface and near-surface defects in ferromagnetic materials. It can detect cracks, fractures, and other discontinuities that may not be easily visible to the  eye.

Rapid and Cost-Effective: Magnetic particle testing is a relatively fast and cost-effective method compared to other non-destructive testing techniques.

Real-Time Results: The method provides immediate results, allowing for real-time defect detection. This enables quick decision-making regarding the acceptability of the tested components or structures, leading to faster production cycles and reduced downtime.

Disadvantages of using the magnetic particle method of defect detection:

Limited to Ferromagnetic Materials: Magnetic particle testing is applicable only to ferromagnetic materials, such as iron, nickel, and their alloys. Non-ferromagnetic materials, such as aluminum or copper, cannot be effectively inspected using this method.

Surface Preparation Requirements: Proper surface preparation is crucial for effective magnetic particle testing. The surface must be cleaned thoroughly to remove dirt, grease, and other contaminants that can interfere with the test results. This additional step may require additional time and effort.

Limited Detection Depth: Magnetic particle testing is primarily suited for detecting surface and near-surface defects. It may not be as effective in detecting deeper or internal defects. Other non-destructive testing methods, such as ultrasonic testing or radiographic testing, may be more appropriate for inspecting components with deeper or internal flaws.

It's important to note that the advantages and disadvantages may vary depending on the specific application, material, and the expertise of the personnel conducting the magnetic particle testing.

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From the that astronomers categorize galaxies into a handful of basic shapes, it can be concluded that the all galaxies are made from the same forces.

Astronomers have categorized galaxies into three main categories,

Elliptical Galaxies:

These galaxies have smooth ellipsoidal shape. They are most abundant type. For example- Messier 49

Spiral galaxies:

These galaxies have a spiral shapes with many hand like structures. For example- Milky way.

Irregular Galaxies:

They do not have any specific shape.

Therefore, from the that astronomers categorize galaxies into a handful of basic shapes, it can be concluded that the all galaxies are made from the same forces.

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Answer:

 E_g = m 392 J,      Ek = m 392

Explanation:

Mechanical energy is a very important concept since if the system does not have friction it remains constant

the potential energy of a system is

          E_g = U = m g (y2 - i)

          E_g = m 9.8 (40 -0)

          E_g = m 392 J

The kinetic energy for this system assuming it started from rest

          E_k = K = ½ m v2

how mechanical energy is conserved

         E_g = E_k

         Ek = m 392

The generalization that can be made about the relative speeds that the sun and the stars move through the sky over the course of a day is that the sun appears to move much slower than the stars. This is because the sun is much closer to Earth than the stars, so its movement is more noticeable.

The stars, on the other hand, are much farther away and their movement is less noticeable.

Another way to think about this is to consider the fact that the Earth is rotating on its axis. As the Earth rotates, the sun appears to move across the sky at a relatively slow speed because it is close to Earth. The stars, however, are much farther away and their movement is not as noticeable. This is why the stars appear to move much faster than the sun over the course of a day.

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The dragster experienced an average acceleration of 48.11 \(m/s^{2}\) during the time it took to reach a speed of 25.5 m/s from rest.

To find the average acceleration of the dragster, we can use the equation: average acceleration = (final velocity - initial velocity) / time

Given that the initial velocity (u) is 0 m/s, the final velocity (v) is 25.5 m/s, and the time (t) is 0.53 s, we can substitute these values into the equation:

average acceleration = (25.5 m/s - 0 m/s) / 0.53 s

Simplifying the equation, we have:

average acceleration = 25.5 m/s / 0.53 s

Calculating this, we find that the average acceleration of the dragster during this time interval is approximately 48.11 \(m/s^{2}\).

Therefore, the dragster experienced an average acceleration of 48.11 \(m/s^{2}\) during the time it took to reach a speed of 25.5 m/s from rest.

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The result of a hypereffective heart in a well-conditioned athlete is an increased stroke volume, leading to a higher cardiac output during physical activity.

A hypereffective heart refers to an exceptionally efficient and strong heart in a well-conditioned athlete. This condition is a physiological adaptation that occurs as a result of regular exercise and cardiovascular training.

In a well-conditioned athlete, the heart undergoes changes that enable it to pump blood more effectively. One significant adaptation is an increase in stroke volume, which is the amount of blood ejected by the heart with each contraction. A hypereffective heart can pump a larger volume of blood per beat, allowing for more oxygen and nutrients to be delivered to the working muscles.

The increased stroke volume leads to a higher cardiac output, which is the total amount of blood pumped by the heart per minute. The hypereffective heart, combined with a lower resting heart rate, enables the athlete to have a higher maximal oxygen uptake (VO2 max) and enhanced exercise performance. This adaptation allows for improved oxygen delivery and utilization during physical activity, leading to increased endurance and overall cardiovascular fitness in well-conditioned athletes.

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The frequency of oscillation of a pendulum can be calculated using the formula:

f = 1 / (2π) √(g / L),

where f is the frequency, g is the acceleration due to gravity, and L is the length of the pendulum.

In this case, the length of the pendulum is given as 2 m. The acceleration due to gravity can be taken as approximately 9.8 m/s².

To find the frequency, we need to determine the value of g / L. Using the given values, we have: g / L = 9.8 / 2 = 4.9 m/s².

Now we can substitute this value back into the formula for frequency:

f = 1 / (2π) √(4.9) ≈ 0.11 Hz.

Therefore, the frequency of oscillation of the pendulum is most nearly 0.11 Hz.

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