Inclined tube manometer can be used to measure small pressure differences accurately True False Question 5 We can neglect the effect of elevation changes on the pressure for stationary gases in the tanks and pipes, however if the elevation changes are in the order of thousands of feet then we must consider the variation of specific weights and hence the pressure changes. True False Question 6 Piezometer tube can measure the pressure of gas while manometer tube is only suitable for measuring liquid True False Question 7 For fluids at rest, the pressure gradient in the vertical direction at any point in the fluid depends only on the A of the fluid at that point.

Answer:

The answers is A lol

Explanation:

Answer:

there is one missing the height of where the object is dropped from. the height is what stays constant

Answer:

13.6 cm

Explanation:

From Snell's law:

n₁ sin θ₁ = n₂ sin θ₂

In the air, n₁ = 1, and light from the horizon forms a 90° angle with the vertical, so sin θ₁ = sin 90° = 1.

Given n₂ = 4/3:

1 = 4/3 sin θ

sin θ = 3/4

If x is the radius of the circle, then sin θ is:

sin θ = x / √(x² + 12²)

sin θ = x / √(x² + 144)

Substituting:

3/4 = x / √(x² + 144)

9/16 = x² / (x² + 144)

9/16 x² + 81 = x²

81 = 7/16 x²

x ≈ 13.6

The statement given "a wave that travels from a medium of lower index of refraction to a medium of higher index of refraction undergoes 180° phase changes relative to the incident wave." is false because when a wave travels from a medium of lower index of refraction to a medium of higher index of refraction, it undergoes a phase change of 0° or a phase shift of less than 180° relative to the incident wave.

The phase change depends on the refractive indices of the two media and the angle of incidence. In general, when light passes from a less dense medium (lower index of refraction) to a denser medium (higher index of refraction), the wavefronts slow down and bend towards the normal, causing a change in direction but not necessarily a 180° phase change. The amount of phase change depends on the specific conditions of the interface between the two media.

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Answer:

The striped magnetic pattern develops because, as the oceanic crust pulls apart, magma rises to the surface at mid-ocean ridges and spills out to create new bands of the ocean floor.

Explanation:

Answer:

The sea-floor spreading starts when the magma rises and erupts from the cracks along the mid-ocean ridges. Once the molten material solidifies, the older rock gets pushed away from the ridge and the new rock forms in the centre of the mid-ocean ridge. According to scientists, the Earth’s magnetic field is involved in this process. Since the oceanic crust contains iron, the way the rocks on the ocean floor hardened on both sides of the mid-ocean ridges are influenced by the direction of the magnetic field. As a result, it forms a pattern that resembles stripes that are alternately pointed north and south.

Or if you want a small answer:

The rock of the ocean floor contains iron. As molten material cools and hardens, the iron particles inside lines up in the direction of Earth's magnetic poles, creating a pattern of magnetized stripes.

To find the power imparted to the particle by the force, we can use the formula:

Power (P) = Force (F) × Velocity (v) × cos(θ)

where θ is the angle between the force and the velocity.

Given:
- Mass of the particle = 6 kg
- Speed along the y-axis = 4.6 m/s
- Force along the x-axis = 19 N

Since the force is along the x-axis and the particle is moving along the y-axis, the angle between the force and velocity is 90 degrees. The cosine of 90 degrees is 0.

Therefore,

P = 19 N × 4.6 m/s × cos(90°)
P = 19 N × 4.6 m/s × 0
P = 0 W

The power imparted to the particle by the force is 0 Watts.

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Answer:

Mercury

Mercury. Mercury is the smallest terrestrial planet in the solar system, about a third the size of Earth. It has a thin atmosphere, which causes it to swing between burning and freezing temperatures.

Explanation:

hope it helps, mark brainliest please

An electric heater draws 12 a from a 120 v power source, the amount of power that is dissipated by the heater is 1440 W.

Energy that is significantly transferred or converted over time can be referred to as power. Watt is used to measure power (W). With the aid of the following formula, it is typically calculable:

P = W/Δt.

The answer to this question depends on the context, but the formula below can be used to determine how much power is lost inside the heater:

P = V × I = 12 × 120 = 1440 W.

As a result, 1440 W of power is lost by the heater in accordance with the scenario.

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To answer this question, we need to remember what distance really is. Distance is far something moves in a scalar motion, which is not relative to where she starts out originally.

Since Diane travels around the track 10 times and the track is 400 meters long, she ultimately ends up traveling 4000 meters.

The direction of the induced current is counterclockwise.

This states that induced electric current flows in a direction such that the current opposes the change that induced it.

The direction of the induced current is counterclockwise as a result of the north pole being oriented downwards which is the opposite direction of the hands of a clock movement.

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Given,

The current, I=0.25 A

The total charge flowing in the circuit is q=6812 C.

The electric current can be defined as the time rate of flow of the charges.

Thus, the electric current is given by,

Where t is the time duration.

Thus the batteries will fry out after 27248 s

The one that is caused by a short-duration burst of energy by the source is D) electromagnetic pulse.

An electromagnetic pulse (EMP) is caused by a short-duration burst of energy emitted by a source, such as a nuclear explosion, a lightning strike, or a high-power electrical discharge.

EMP releases a powerful and rapid electromagnetic wave that can disrupt or damage electronic devices, power grids, and communication systems. It is characterized by a strong and sudden surge of electromagnetic energy across a wide frequency range.

On the other hand, electromagnetic interference (EMI) refers to the disturbance caused by electromagnetic radiation from external sources that interferes with the normal operation of electronic devices. Faraday interference is not a recognized term in this context.

Electrostatic discharge (ESD) refers to the sudden flow of electricity between two objects with different electric potentials, often resulting in a spark.

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Answer:

rusting is a chemical property because it is irreversible it changes the identity of a substance

Answer:

C. chemical property

Explanation:

a chemical property of iron is that it is capable of combining with oxygen to form iron oxide，the chemical name of rust

Yes, it is true that passive diffusion is indeed more energy-efficient than active diffusion.

Passive diffusion is a process in which substances move across a membrane or through a concentration gradient without the need for energy input. It occurs due to the natural random motion of molecules, where they move from an area of higher concentration to an area of lower concentration until equilibrium is reached. Passive diffusion does not require the expenditure of energy by the cell or any other external source.

On the other hand, active diffusion involves the movement of substances against a concentration gradient, from an area of lower concentration to an area of higher concentration. This process requires the input of energy, usually in the form of adenosine triphosphate (ATP), to actively transport molecules or ions across the membrane.

Since active diffusion involves the use of energy to move substances against their concentration gradient, it is less energy-efficient compared to passive diffusion, which relies on natural concentration gradients and does not require additional energy expenditure.

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Answer:

No, this situation is not happening due to repression. Repression is a psychological defense mechanism in which a person unconsciously blocks out unpleasant or traumatic memories, thoughts, or feelings. In this situation, the person is simply not paying attention to their roommate and is instead focusing on the TV.

the change in direction of a wave passing from one medium to another caused by its change in speed this is from my study guide hope that helps

example: when you are sitting in a pool and ur leg looks deformed or even cut in half its caused my refraction.

Answer:59.3

Explanation:

The force due to gravity or weight is 582 N. The mass of a student  is 59.39 Kg.

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

Force = mass.acceleration

582 = m*9.8

m = 59.39 Kg.

The force due to gravity or weight is 582 N. The mass of a student  is 59.39 Kg.

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The best describes the movement of the object between the times of 0 and 6 on the graph is moving at a constant speed. Therefore, option A is correct.

Moving occurs when an object's location compared to a fixed spot changes. Even seemingly stationary things shift. When one item moves in connection to another, we say it is moving relative to the other object.

Kinematics is the field of physics concerned with forces and their effects on motion, whereas dynamics is concerned with forces and their effects on motion. When a force pushes or draws on an item, it moves in the same way as the force.

Thus, option A is accurate because the object moves at a consistent pace between periods 0 and 6 on the graph.

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The magnitude of a vector is its length. We can represent greater magnitude by drawing a longer arrow.

Here we are required to determine how the Newtons second law of motion can be algebraically rearranged to solve for acceleration (a).

The correct answer is Choice B: a = F/m

Newton's second law of motion states that the force applied is directly proportional to the rate of change in momentum of the body.

i.e

where (v - u)/t = acceleration, (a)

Therefore, F = ma.

By rearranging; i.e solving for acceleration, (a);

we divide both sides by mass, m

we have;

a = F/m

The algebraic rearrangement to solve for acceleration, (a) is therefore;

a = F/m

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Answer:gravity

Explanation:

gravity holds the planets in its orbit

Answer:

Newton's first law is called the law of inertia.

Explanation:

Answer:

Three examples of insulators would be metals, graphite, and the human body. Examples of insulators include plastics, rubber and glass. Lastly, a few examples of semiconductors would be silicon, germanium and gallium arsenide.

Type one space between the number and the units, and then enter the units in the correct format. For example, a velocity would be entered as "1.2 m/s", not "1.2m/s".

The pace at which an object's direction changes when it is traveling is referred to as its velocity and is measured by a particular unit of time and from a particular point of view. Velocity is a fundamental concept in kinematics, the branch of classical mechanics that deals with the motion of bodies.

Velocity can be defined as the rate at which something moves in a specific direction. as the speed of a car driving north on a highway or the pace at which a rocket takes off.

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Normally, materials are electrically neutral because there are equal numbers of positively charged particles and negatively charged particles, hence option D is correct.

Since there are exactly as many electrons in an atom as there are protons, the positive and negative charges "balance out," leaving atoms electrically neutral.

Neutrons are found in the nuclei of all atoms, with the exception of the majority of hydrogen atoms. Neutrons are electrically neutral, as opposed to electrically charged protons and electrons.

Therefore, due to having an equal number of positively charged particles and negatively charged particles materials are electrically neutral.

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Answer:

15m

Explanation:

The acceleration is the same, if the initial velocity is the same, the times of going up and down are the same.

If the initial velocity is the same for both processes, the acceleration is the same and the times are the same.

The relationship between the net force, the masses, and the acceleration of the bodies is established by Newton's second law.  

∑ F = m a

In the image of the block moving up and down the ramp in the attached, a free-body can be observed; in this example, the x-axis is parallel to the ramp and the y-axis is perpendicular. The reference system is a coordinate system with respect to which the forces are depicted.

Sinθ =  Wₓ/W

Cosθ =  W_y/W

Wₓ = WSinθ

W_y = Wcosθ  

Newton's second law for each axis.

Case 1. Block slides down on x-axis

Wₓ = ma

mg sinθ = ma

a = g sin θ

Case 2. Block rises

X-axis

- Wₓ = m a

- mgsin θ = a

a = - g sin θ

Acceleration is equal in both 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

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Your question is incomplete, most probably the full question is this:

(b) The block takes time tup to slide up the ramp a distance x The block then takes time down to slide back down to the bottom of the ramp, where it has speed up. Is flows greater than equal to

or less tup?

tdown >tup -tdown = tup .tdown In a clear, coherent paragraph-length response that may also contain figures and/or equations, explain your reasoning. If you need to draw anything other than what you have shown in part (a) to

assist in your response, use the space below. Do NOT add anything to the figures in part (a).

Answer: (a) When Sarah pulls on one end of the rope with a force of 100 N, and her friend Jane pulls on the other end with an equal force of 100 N, the rope experiences a tension force. The tension force acts along the length of the rope, pulling it in opposite directions from each end. As a result, the rope remains taut and does not move in any particular direction.

(b) Without the given picture, it's not possible to identify specific labels for P, W, N, and f. However, I can provide explanations of what these labels generally represent:

(c) The box will move when an external force overcomes the opposing forces acting on it, such as friction and the normal force. If the applied force (P) is greater than or equal to the sum of the frictional force and the normal force, the box will start to move. To move the box with less effort, one can reduce the frictional force. This can be achieved by using lubricants or reducing the roughness of the surfaces in contact, thereby minimizing the resistance to motion. Additionally, applying the force at an angle or using mechanical advantage, such as using a lever or pulley system, can also help in moving the box with less effort.