Change+the+bar+magnet+strength+to+20%.+how+did+the+brightness+of+the+lightbulb+change?+why?

The block will oscillate back and forth along the horizontal surface with a period given by the equation $T = 2\pi\sqrt{\frac{m}{k}}$,

where $m$ is the mass of the block, $k$ is the force constant of the spring, and $T$ is the period of the oscillation. In this case,

the mass of the block is 150 g, which is equivalent to 0.15 kg, and the force constant of the spring is 3.2 N/m.

Plugging these values into the equation, we get

$$T = 2\pi\sqrt{\frac{0.15}{3.2}} \approx 0.3268\text{ s}$$

The amplitude of the oscillation is equal to the maximum displacement of the block from its equilibrium position, which in this case is 3.0 cm. The block will oscillate back and forth with this amplitude and with a period of approximately 0.3268 seconds.

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Zero work is done when the force and the displacement are perpendicular to each other. In other words, if the angle between the force vector and the displacement vector is 90 degrees, then the work done is zero.

Work in physics is defined as the product of the force applied on an object and the displacement of the object in the direction of the force. Mathematically, work (W) is given by the equation.

W = F * d * cos(theta)

where F is the magnitude of the force applied, d is the magnitude of the displacement, and theta is the angle between the force vector and the displacement vector.

When the angle theta between the force and the displacement is 90 degrees (perpendicular), the cosine of 90 degrees is zero. Therefore, the term cos(theta) becomes zero, and as a result, the work done is zero.

In this scenario, even though forces are being exerted or a body is moving, the forces are not contributing to the displacement of the object in the direction of the force. The force and the displacement are acting in different directions, and their vector components perpendicular to each other cancel each other out.

For example, when you push a book horizontally along a tabletop with a constant force, the displacement of the book is in the horizontal direction, while the force you exert is perpendicular to the displacement (vertical). As a result, no work is done on the book by your pushing force.

Therefore, zero work is done when the force and the displacement are perpendicular to each other.

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Answer:

Recycled answer from jaskhanna07343

Explanation:

Water does not wet waxed surfaces because the cohesive forces within the drops are stronger than the adhesive forces between the drops and the wax. Water wets glass and spreads out on it because the adhesive forces between the liquid and the glass are stronger than the cohesive forces within the water

When a force is applied to stretch a spring, the work done by the spring force will be negative because it acts in the opposite direction to the displacement of the object.

This is because the spring force acts in the opposite direction to the displacement of the object. According to the definition of work, work is done when a force is applied to an object and the object is displaced in the direction of the force.

In the case of a spring being stretched, the spring force acts in the opposite direction to the displacement of the object. Therefore, the work done by the spring force will be negative. The work done on the spring, on the other hand, will be positive because the displacement is in the direction of the applied force.

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Answer:

A variable amount of current travels through each parallel branch of the circuit in a parallel circuit. Each component in a series circuit has a separate voltage across it. The same voltage is present across all of the circuit's components in a parallel circuit, though.

Explanation:

Newton's first law of motion:

Newton's first law of motion states that a body in motion tends to remain in motion at a constant velocity unless acted on by a net external force.

Hence, the correct option is (B)

3.) the total momentum change per unit of time, and the total momentum change are both important in determining the amount of damage an object sustains in a collision.

The amount of damage an object receives in a collision depends on both the overall momentum change and the momentum change per unit of time. The mass and velocity of the objects colliding determine the total momentum change, which is a measure of the force of impact. The impulse, also known as the change in momentum per unit of time, is equally significant. This gauges how long an impact lasts and how the force is applied throughout that time. Impacts that last longer and exert less force can cause less harm than impacts that last less time and exert more force. The specific factors that contribute to damage will depend on the details of the collision, such as the speed, mass, and shape of the objects involved.

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The ball be traveling the fastest at the position C.

At the top of its path, the ball will have zero instantaneous velocity, because the acceleration due to gravity is acting downwards and will slow down the ball.

At point C, the velocity will be the maximum.

Even though, the point D is at same position as that of C, the ball will have lesser velocity at D than at C, due to the bouncing.

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The amount of charge delivered to the ground by a lightning bolt is determined by the current and the time for which it flows. The current of a lightning bolt is typically around 1.26 x 10^3 A, and the duration of a lightning bolt is usually around 0.138s. To calculate the total charge delivered by a lightning bolt, you must use the equation Q = I x t where Q is the charge, I is the current, and t is the time.

In this case, the total charge delivered to the ground by the lightning bolt can be calculated as
Q = 1.26 x 10^3 A x 0.138s = 173.68 C.
This is the amount of charge that the lightning bolt delivers to the ground, with 173.68 C (Coulombs) being equal to one Ampere-second.

To conclude, a lightning bolt with an average current of 1.26 times 10^3 A lasting 0.138s will deliver a total of 173.68 C (Coulombs) of charge to the ground.

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Answer:

The correct option is;

(A) 25.8 cmHg

Explanation:

The given parameters are;

The height of the mountain over which the eagle is flying = 2700 m

The average density of air, ρₐ = 1.3 kg/m³

The atmospheric pressure at sea level = 76 cmHg = 0.76 mHg

The density of mercury, \(\rho _m\) = 13,600 kg/m³

The formula for pressure, p, is p = ρ·g·h

The pressure in the atmosphere = 13,600 × 0.76 × g = 10,336·g

The equivalent height of air is found as follows;

1.3 × g × h = 10,336·g

h = 10,336/1.3 = 7,950.769 meters

Therefore;

The pressure of the atmosphere at 2,700 meters, p₂₇₀₀ = (2,700/7,950.769) × 76 cm Hg

Which gives;

p₂₇₀₀ = 25.808 cmHg ≈ 25.8 cmHg.

Answer:

the unit of force in the centimeter-gram-second system equal to the force that would give a free mass of one gram an acceleration of one centimeter per second per second.Explanation:hope its a good answer

Answer:

6.35hours

Explanation:

s=vt

t=s/v=502/79=6.35hours

Answer:

Explanation:

equal in magnitude and opposite in direction

Answer:

Wood helps in home insulating because logs have both a proper structure and insulation. Since the log has so much heat storage, its huge mass will have a lot more thermal energy than other materials for insulating.

Answer:

280

Explanation:

I used the equation for momentum, p=mv

70 x 4 = 280

The position of the image of the object would be 7.5 cm behind the mirror.

The focal lengths of all convex mirrors are negative and are given by the following formula:

1/f = - (1/R)

where:

Substituting for R in the equation, we are going to have:

1/f = -1/20 cm

f = -20 cm

Next, we can make use of the mirror formula to find the position of the image along the plane of the mirror:

The mirror formula goes thus:

1/f = 1/do + 1/di

where 'do' is the object distance and di is the image distance.

Substituting the values of f and di:

1/-20 cm = 1/12 cm + 1/di

Thus:

di = -7.5 cm

That the di is negative is an indication that the image is a virtual one that forms behind the mirror. In other words, the position of the image is 7.5 cm behind the mirror.

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The acceleration of a car traveling at 2 m/s and increases its speed to 14 m/s in 4s is 3m/s².

The acceleration of a moving body is the amount by which a speed or velocity increases. It is the change in velocity with respect to time.

The acceleration of a moving body can be calculated using the following formula:

a = (v - u)/t

Where;

According to this question, a car is traveling at 2 m/s and increases its speed to 14 m/s in 4s. The acceleration can be calculated as follows:

a = (14 - 2)/4

a = 12/4

a = 3m/s²

Therefore, the acceleration of a car traveling at 2 m/s and increases its speed to 14 m/s in 4s is 3m/s².

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Answer:

D. Moving the objects closer together

Explanation:

A.P.E.X.

took the quiz

Answer: an upward-sloping line drawn on a graph with acceleration shown on the y-axis and force shown on the X-axis

just took the test

an upward-sloping line drawn on a graph with acceleration shown on the y-axis and force shown on the X-axis best describes a graph that would represent the relationship shown in the table

A graph is represented as pictorial form  the of data or numeric values in an organized manner which enables user to represent large amount of data in visual form.

There are 2 types of questions and the features of graphs are interpretation of given graphs or selecting a graph based on a verbal description.

The bar graphs are the most common type of graph, other graphs are dot plots, histograms, line graphs and scatterplots.

A Bar Graph is represented as the graphical display of data using rectangular bars of different parameters like heights, The structure can be represented  in the y axis contains values, and the x axis contains categories or time periods.  

A dot plot is a simple graphical representation  which shows the frequency with which items appears in a data set and present data on the x axis.

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Answer:

Since there is already an answer i will try to go more into depth about how it was solved.

Explanation:

Using the basic equation S=d/t, where S is speed is in km/hr, d is distance in km, and t is time in hours, we can plug in the two separate pairs of known variables.

Pair 1:

S=d/t

82km/hr=293.8km/t

t=3.583hr

Pair 2:

S=d/t

48km/hr=194.4km/t

t=4.05hr

since the question is asking us for the total time, we can add these two together.

3.583hr+4.050hr=7.633hr

So she has traveled for a total of 7.633 hours

Hope this helps you understand the question a little more!

Answer:

This is because we are surrounded by positive ions from electromagnetic fields generated by computers, cell phones, and other electronic devices which can impair brain function and suppress the immune system causing symptoms such as: anxiety, breathing difficulty, fatigue, headaches, irritability, lack of energy, poor concentration, nausea, and vertigo,

Explanation:

Answer:

Ions can be harmful because ions can produce dangerous indoor ozone and  can waste space and electricity. Hours of negative ion exposure can produce symptoms of depression. On the other hand, ions can help improve our immune systems by strengthening our immune cells. Ions can also speed up the production of antibiotics.

The attractive Coulombic force between the proton and electron is approximately 2.3 x 10^-8 N.

To calculate this force, we can use Coulomb's law: F = (kq1q2)/r^2, where F is the force, k is Coulomb's constant, q1 and q2 are the charges of the two particles, and r is the distance between them. Plugging in the values, we get F = (9x10^9 Nm^2/C^2)(1.6x10^-19 C)*(-1.6x10^-19 C)/(4x10^-18 m^2) = -2.3x10^-8 N. The negative sign indicates that the force is attractive.

In summary, the attractive Coulombic force between the proton and electron is -2.3 x 10^-8 N, which is found using Coulomb's law and the charges and distances given in the problem.

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A photometer measures the intensity of light or other electromagnetic radiation.

A photometer is a device that is used to measure the intensity of light or other electromagnetic radiation. Photometers can be used to measure the brightness of a light source, the transmittance or reflectance of a material, or the spectral distribution of light.

A common type of photometer is a photomultiplier tube, which uses a photocathode to convert incoming photons into electrons. The electrons are then accelerated and amplified through a series of dynodes, resulting in a large output signal that can be measured and used to quantify the intensity of the incoming light.

The statement about saturation in the original question may be referring to the maximum amplification that can be achieved by the photomultiplier tube, which is determined by the number and geometry of the dynodes. In this context, saturation would occur when the amplification reaches its maximum value and can no longer be increased.

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Answer:

See the answer below

Explanation:

The weight of a body is defined as the product of mass by the acceleration gravitation of space or place.

1)

\(W=m*g\)

where:

m = mass [kg]

g = gravity acceleration = 9.8 [m/s²]

Therefore:

\(m=W/g\\m=62/9.8\\m=6.32[kg]\)

2)

The mass remains the same regardless of where the object or body is located. That is, the mass will be equal on Mars and on Earth.

3)

We used the same equation to determine the weight, using the Mars gravity constant.

\(W=6.32*3.7\\W=23.4[N]\)

Answer:

A human

Explanation:

An elephant weighs more, therefore it's gravitational pull by Earth impacts it more than a human.

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Answer:

Explanation:

Think of it this way: An elephant has more inertia than a human. It is much harder to push an elephant across a floor than it is a human, and much harder to stop the elephant once it is moving. Therefore, by definition, an elephant has more mass than a human.

If the speed doubles, the period must be halved in order for the radar to remain unchanged.

The period of an object in circular motion is the time it takes for one complete revolution. It is inversely proportional to the speed of the object. When the speed doubles, the time taken to complete one revolution is reduced by half. This means that the period must also be halved in order for the radar to maintain the same timing. For example, if the initial period was 1 second, it would need to be reduced to 0.5 seconds when the speed doubles to keep the radar measurements consistent.

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The smallest component of a digital picture or graphic that can be shown on a digital display device is a pixel.

Thus, The fundamental logical unit in digital graphics is the pixel. A whole image, movie, piece of text, or other visible object on a computer monitor is made up of pixels.

The terms "pixel" and "picture element" both refer to the same thing. A dot or square on a computer monitor's display screen serves as the representation of a pixel. Geometric coordinates are used to construct the fundamental building pieces of a digital image or display, known as pixels.

The amount, size, and color mix of pixels varies and is measured in terms of the display depending on the graphics card and display monitor.

Thus, The smallest component of a digital picture or graphic that can be shown on a digital display device is a pixel.

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