What is the angle between A and B, if A = 3.0i+5.0j and B = -3.0 i +7.0j Equation: A.B=AB cos 0

Answer:

i think its  Russia, USA, Germany.

If you press on the plunger, you increase the pressure of the air, and thus the air in the small syringe escapes out, and hens the large syringe gets expanded.

Also the colored water gets filled inside the larger syringe.

Answer:

Explain. yes it is possible because when the net force is zero and acceleration is zero. ... no, Neglecting air friction, the only force acting on this object is the force of gravity downward. There is no force of equal magnitude as the force of gravity acting in the opposite direction.

Answer:

Range = 9

Explanation:

From the question,

Mean = summation data/Total frequency

Mean = (6+7+x+13+10)/5

If the mean is 8,

8 = (36+x)/5

Solve for x

36+x = 8×5

36+x = 40

x = 40-36

x = 4.

Range is the difference between the biggest and the smallest value in a given distribution.

from the above,

Range = 13-4

Range = 9

Answer:

chemical energy is converted to electrical energy in a voltaic cell.

party and being happy..........

A Conjunctive adverb is a word that connects to complete clauses with each other and define their relationship.

An adverb is a word or phrase that defines and qualifies the quality of the verb. That means it tell us that how and when the things are happening for the particular adjective or verb. For an example, fast running. Here, the word fast is the adverb because the word fast is telling us about the nature of running which is fast.

A conjunctive adverb is a word that connects two sentences together.

For an example, He is said since I told him about college.

Here, "He is said" since "I told him".

So, the world "since" is the conjunctive adverb because it is connecting the two complete different sentence.

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Answer:

Its upside down

Explanation:

I recommend asking a teacher for help

Since the material does not absorb energy from either X-ray or gamma ray light, neither form of light is likely to harm it.

A handheld UV meter can be used to measure ultraviolet (UV) radiation, which is measured in microwatts of UV radiation per lumen of visible light. UV radiation's high energy causes significant harm to collection materials.

No. Light is not a physical object, hence the unknown substance cannot change. Light cannot transform material objects like the mystic substance.

Refraction happens when light passes through one medium and then another, altering its speed as it does so. As a result, when light strikes the surface of a new substance, it bends.

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Answer:Single-Replacement, synthesis, decomposition, combustion.

Explanation:

Had to get it wrong to find out

Redox reactions include Single-replacement, synthesis, decomposition, composition Reactions. Hence option B is correct.

Redox reaction is type of reaction in which oxidation number participating molecules changes. Redox reaction involves two types of the reaction oxidation and reduction. these two reaction take place simultaneous. Oxidation is the loss of electrons and reduction is the gain of electrons.

Oxidation is nothing but addition of oxygen and loss of hydrogen and reduction is loss of oxygen and gain of hydrogen.

Redox reactions include Single-replacement, synthesis, decomposition, composition Reactions.

The oxidation half-reaction is: H₂ → 2H⁺ + 2e⁻

The reduction half-reaction is: F₂ + 2e⁻ → 2F⁻

Hence option B is correct.

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Answer:

When you put un-like poles together (South facing North) you can feel magnetic attraction. In the Northern Hemisphere, your compass needle points North, but if you think about it for a moment, you will discover that the magnetic pole in the Earth's Northern Hemisphere has to be a South polarity.

Answer:

is being negatively reinforced. The unpleasant stimulus that Schwartz is experiencing is the electric shock, and by yelling "Uncle!" he is reducing that stimulation and making himself feel better. As a result, he is receiving unfavorable reinforcement for his behavior.

Explanation:

Answer:

The weight and the mass of an object are related because the weight of an object is a measure of the force exerted on the object by gravity, or the force needed to support it. w=mg

The work done by the crane on the load is positive. As the load was initially at rest, the crane had to apply a force greater than the weight of the load to lift it up against gravity. This means that the crane did work on the load by transferring energy to it in the form of gravitational potential energy.

The work done is equal to the product of the force applied by the crane and the distance over which the force was applied.

Once the load reaches the top of the tower, the work done on the load is zero. This is because the load is no longer moving and is not experiencing any change in potential energy or kinetic energy. The crane is also not applying any force on the load at this point.

As the crane gently sets the load down, the work done on the load is negative. The crane is applying a force that is less than the weight of the load, and the load is moving in the opposite direction to its initial motion. This means that the crane is transferring energy out of the load, resulting in a decrease in the load's potential energy. The work done is equal to the product of the force applied by the crane and the distance over which the force was applied, which is in the opposite direction to the direction of motion.

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Answer:

it will hit 80

Explanation:

because evey sec

is 10

Answer:

11 Ω

Explanation:

You need to add up all the resistances of the circuit, because it is a series connection here

R = 2,0 Ω + 4,0 Ω + 5,0 Ω = 11 Ω

Answer:

14

Explanation:

the left top is protons

hope this helps :)

vernier caliper is clean and free from any debris or dirt that may affect the accuracy of the measurement.

how to measure a coin using a vernier caliper and an observation table to record the measurements. Instructions:

Ensure that the vernier caliper is clean and free from any debris or dirt that may affect the accuracy of the measurement.

Place the coin on a flat surface and inspect it for any irregularities that may affect the measurement.

Gently pick up the coin and place it in between the jaws of the vernier caliper. The jaws should be placed on opposite sides of the coin and be perpendicular to the coin's surface.

Tighten the jaws of the vernier caliper until they are snug against the coin.

Read the measurement from the scale on the vernier caliper. The scale should be read to the nearest 0.01 mm.

Record the measurement in the observation table below.

Observation table:

Measurement 1 Measurement 2 Measurement 3 A.measurement

Repeat the process at least three times to get an accurate measurement. Record each measurement in the observation table and calculate the average measurement by adding up all the measurements and dividing by the number of measurements taken.

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Aerodynamics is a way to reduce drag that uses car manufacturers.

Aerodynamics is the motion of the air. airplane flies cause of aerodynamics.

Aerodynamics is the study of forces that are resulted by motion of the air.

To reduce the aerodynamic drag further, the manufacturers use character lines on the exteriors of the car's body right from its concept stage. These lines help the air to pass smoothly over the body and thus, reducing the air resistance.

cars have flat vertical face in front. When it moves through air, drag force directly proportional to the velocity applies on the car which opposes motion of the car. after studding aerodynamics when we make triangular like shape to the front body of the car, it cuts the air and front air goes from side of the car which reduces oppose to the motion, and car can have more speed.  

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Water is not wet itself or it does not make things wet. The water makes bond with the other materials through adhesive forces.

Wetness is a description of the experience of water, it is a quality of the liquid water. Liquid water is not itself wet, however it cannot even make things actually wet. Wetness is the ability of a liquid to adhere to the surface of a solid material, so when we say that something is wet, we mean that the liquid material is sticking to the surface of a material.

An adhesion is present between two things and something that the water molecules cannot do to itself. Water has to be wetted by something else or it makes no sense at all. Water can be wetted easily by oil or another foreign liquid, however it cannot wet itself.

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Photons are reflected back and forth through the lasing medium, which greatly increases the probability of stimulated emission. The correct answer is d.

Placing the lasing material between the two mirrors of an optical cavity allows the photons to bounce back and forth through the lasing medium, increasing the probability of stimulated emission and amplifying the light to produce a laser beam. This process is essential for the sustained laser action. The Pauli exclusion principle and energy quantization may be relevant to the behavior of atoms and electrons in the lasing material, but they do not directly explain the need for an optical cavity. The uncertainty principle and thin-film interference are also not directly related to the function of an optical cavity in laser operation.
To sustain laser action, it is usually necessary to place the lasing material between the two mirrors of an optical cavity because:
d. Photons are reflected back and forth through the lasing medium, which greatly increases the probability of stimulated emission.

The optical cavity allows photons to travel back and forth through the lasing medium, increasing the chances of interacting with excited atoms and causing stimulated emission. This process amplifies the light, leading to the production of a coherent laser beam.

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(a) The moment of inertia of the system about the axis can be calculated using the formula for the moment of inertia of a point mass rotating about an axis.

(b) The angular momentum of the system about the axis can be determined by multiplying the moment of inertia by the angular speed.

(c) If the masses are pulled into a smaller radius, the moment of inertia will change, resulting in a new angular momentum for the system.

(d) The new angular speed of each mass can be calculated using the principle of conservation of angular momentum.

(e) The change in energy of the masses can be determined by comparing the initial and final kinetic energies of the system.

(a) To calculate the moment of inertia of the system about the axis, we consider the two point masses rotating at a given radius. The moment of inertia for each point mass is given by the formula I = m * r², where m is the mass and r is the radius.

Since there are two masses, we can calculate the total moment of inertia by summing the individual moments of inertia.

(b) The angular momentum of the system is determined by multiplying the moment of inertia by the angular speed. Using the formula L = I * ω, where L is the angular momentum, I is the moment of inertia, and ω is the angular speed, we can find the angular momentum of the system.

(c) If the masses are pulled into a smaller radius, the moment of inertia will change. We can calculate the new moment of inertia using the same formula as in (a) but with the new radius. With the new moment of inertia, we can determine the new angular momentum of the system.

(d) To find the new angular speed of each mass, we apply the principle of conservation of angular momentum. The initial angular momentum of the system is equal to the final angular momentum. By rearranging the equation L = I * ω and solving for ω, we can calculate the new angular speed.

(e) The change in energy of the masses can be determined by comparing the initial and final kinetic energies of the system. The initial kinetic energy is given by (1/2) * I * ω², where I is the initial moment of inertia and ω is the initial angular speed.

Similarly, the final kinetic energy can be calculated using the new moment of inertia and angular speed. The difference between the initial and final kinetic energies represents the change in energy of the masses.

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Answer:

a= 1.72 m/sec/sec

Explanation:

F=ma , here force is given as 430N and mass as 250 kg so using the formula acceleration can be calculated as follows

∴F=ma

1 N= 1 kg m\(s^{-2}\)

\(a=\frac{F}{m}\)

\(a=\frac{430 kg m/sec/sec}{250 kg}\)

a= 1.72 \(ms^{-2}\)

The speed of the space probe when fired as a projectile from the earth's surface relative to the sun is 52.62* 10³ m/s.

As per energy conservation we can say,

Entire initial energy of an object at the earth's surface equals total final energy of an object at its greatest point

Now we have,

U1 = -(G M* m)/R + 1/2 mv²

where,

M = mass of earth

m = mass of object

R = radius of earth

Now, when an object travels far from the earth, all of its energy is kinetic.

U2 = 1/2* m * vf²

Now by energy conservation,

-(G M* m)/R + 1/2 m v² = 1/2* m * vf²

-(G M)/R + 1/2 v² = 1/2 vf²

-[( 6.67* 10⁻¹¹)(5.98* 10²⁴)]/6.37* 10⁶ + 1/2* (5.38* 10⁴)² = 1/2 vf²

-6.26* 10⁷ + 144.7 * 10⁷ = 1/2 vf²

1/2 vf² = 138.44* 10⁷

vf² = 2768.8* 10⁶

vf = 52.62* 10³ m/s

Thus, the speed of the space probe is 52.62* 10³ m/s.

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The treatment most likely to use is Superficial External bean Radiation Therapy. Then the correct option is B.

The electromagnetic spectrum consists of the range of all types of EM radiation. Radiation is a packet of energy that travels and spreads out.

It has radio waves, infrared waves, visible light waves, ultraviolet rays, and microwaves.

They possess high energy even to penetrate deep within the material. the electromagnetic spectrum has a longer wavelength and less frequency.

Haley noticed a small spot on her skin that turned out to be skin cancer.

Surgery, radiation, chemotherapy, and hormone therapy can all be used to relieve signs and symptoms.

Medications may relieve symptoms such as pain and shortness of breath. Palliative treatment can be used.

The treatment most likely to use is Superficial External bean Radiation Therapy.

Then the correct option is B.

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