an electron moving at 4.00 x 103 m/s in a 1.25-t magnetic field experiences a magnetic force of 1.40 x 10-16 n . what angle does the velocity of the electron make with the magnetic field?

The dimension of the cylinder will be r = 8.92 cm and h = 17.86 cm.

What is dimensions?

An item, region, or space's dimensions are its size or distance from another point in space. The metric of anything's length, width, and height can be put more simply.

Length and Breadth are  a common way to convey dimensions. 

Main body:

Volume of cylinder, [tex]v = \pi r^{2}h[/tex]

Surface area = [tex]2\pi r^{2} + 2\pi rh[/tex]

given surface area = [tex]1500 cm^{2}[/tex]

[tex]h=(750/\pi r)-r ---(1)[/tex]

V = [tex]\pi r^{2}\left \{ {(750/\pi r)-h[/tex]

V = 750-3[tex]\pi r^{2}[/tex]

put V' = 0

0 = 750-3[tex]\pi r^{2}[/tex]

r≈ 8.92 cm

By substituting the value of r in eq (1)

we get h = 17.86 cm

therefore, the dimension of cylinder are r = 8.92 cm and h = 17.86 cm

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The speed an observer in one of those galaxies see the other galaxy moving away is 400,000 km/s.

The speed of one galaxy with respect to the other as seen by an observer in one of the galaxies is known as the relative speed of the galaxies.

A relative speed is often measured with respect to a frame of reference. The frame of reference in this question is the observer in one of the galaxies.

Vr = Va + Vb

where;

Vr = 200,000 km/s  +  200,000 km/s

Vr = 400,000 km/s

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A swimmer cannot go forward while wearing a drag suit because it creates more pressure and friction with the water than a racing suit does, and the swimmer must use more power to get past it.

As a swimmer becomes accustomed to exerting more force, his or her muscles work out and help build strength.

Drag, lift, gravity, and buoyancy are the forces at play. The primary propelling forces that swimmers employ are lift and drag. Drag, often known as resistance, can be divided into three primary groups: eddy resistance, skin friction, and frontal resistance.

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The calculated efficiency of heat engine during each cycle is 25%.

A heat engine is a machine that transforms heat energy into usable mechanical work for people. The process is carried out using a straightforward apparatus. The ratio of the work a heat engine performs to the heat it absorbs throughout each cycle is referred to as the heat engine's efficiency. It can also be referred to as the heat engine's thermal efficiency. If there is the greatest difference between the hot and cold reservoirs, a heat engine can operate at its maximum efficiency. There is no unit for efficiency.

A formula and a symbol can be used to indicate the efficiency of the heat engine, which is a fraction of the heat and useful work produced. The formula for heat engine efficiency is,

η= [tex]\frac{W}{Q1}[/tex]

where,

η= Thermal efficiency, W= Acquired useful work, Q1= Given heat energy

The energy given to the heat engine= 400 Joule

And the energy exhausted by the heat engine= 300 Joule

So, during each cycle of operation, the engine's efficiency can be calculated by:

η= [tex]\frac{Q1-Q2}{Q1}[/tex]

η= [tex]\frac{400-300}{400}[/tex]

η= [tex]\frac{1}{4}[/tex]

Therefore, this heat engine is found to be 25% efficient.

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The displacement of a plane that is uniformly accelerated from 66 m/s to 88 m/s in 12 s is 131.76 m.

There are three equations that correlate displacement to two of the other three parameters we use to describe motion: time, velocity, and acceleration when acceleration is constant.

Firstly, the distance for uniformly accelerating motion can be found by multiplying the average velocity by the time.

d=[tex]\frac{1}{2}[/tex][tex](v_{f} + v_{i} )[/tex][tex](t)[/tex]

The second equation that relates displacement, time, initial velocity, and final velocity is generated by substituting this equation into equation 1.

[tex]v_{i} t+\frac{1}{2} at^{2}[/tex]

The third equation is formed by combining 1 and 2.  If we solve the first equation for t and then substitute it into the second equation, we get

[tex]v_{f} ^{2} =v^{2} _{i} + 2ad[/tex]

which gives us when simplified:

[tex]d=\frac{1}{2} at^{2}[/tex]

So from the question,

[tex]v_{f} =v_{i} +at\\88=66+12a\\12a=88-66\\12a=22\\a=\frac{22}{12} \\a=1.83 m/s^{2} \\[/tex]

Then we substitute the value of a into the final equation,

[tex]d=\frac{1}{2}at^{2}\\ d= \frac{1}{2}1.83*12^{2} \\d= \frac{263.52}{2} \\d=131.76 m[/tex]

Therefore the displacement is 131.76m.

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The velocity of m2 after the collision is 1 m/s.

The conservation of momentum states that, inside some problem domain, the quantity of momentum remains regular; momentum is neither created nor destroyed, however, best changed via the motion of forces as described via Newton's legal guidelines of motion.

Calculation:-

Given,

mass 1 = 4 kg

v1 = 4 m/s

mass 2 = 8 kg

v2 = 0 stationary

final velocity V'1 = 2 m/s

Let the final velocity of V'2 =?

applying conservation of linear momentum

m1v1 + m2V2 = mV'1 + m2V'2

4× 4 + 8×0 = 4×2 + 8×V'2

16 = 8 +8V'2

V'2 = 8/8

       = 1 m/s

The regulation of conservation of momentum states that in an isolated system the entire momentum of or more of our bodies performing upon each other remains steady until an outside pressure is implemented. therefore, momentum can neither be created nor destroyed.

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The speed of the bubble between P and Q, given that the time required is 2.0 seconds, is 3.7 cm/s

We know that speed is defined as the distance travelled per unit. It can be expressed as:

Speed = distance / time

First, we shall determine the distance between P and Q. This is given below:

Distance = 25.70 - 18.30

Distance = 7.40 cm

Finally, we shall determine the speed of the bubble. Details below:

Speed = distance / time

Speed = 7.40 / 2

Speed = 3.7 cm/s

Thus, the speed of the bubble is 3.7 cm/s

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Missing part of question:

See attached photo

If a ball is dropped from an elevated position and at the same time and same height, a second ball is launched horizontally, then both ball will hit the ground together. It can happen because the only force act to both balls vertically is only gravity force.

In this experiment, although both balls have very different horizontal velocities, but it does not affect the vertical motion. Both balls start with zero vertical velocity, and accelerate at the same rate of gravity.

Gravity is a force that pulling together all matter. The more matter, the more gravity, so anything that have such a lot of matter like planets, moons, or stars pull more strongly. Gravity also affected by the mass of the objects and distance between objects.

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The relationship of potential energy is that when mass of the object increases or height of the object increases, potential energy will increase also.

The energy that an item has or acquires when its location changes as a result of being in a gravitational field is known as gravitational potential energy. Gravitational potential energy can be defined as an energy that has a connection to gravitational force or gravity.

Take two pencils for the most typical illustration to help you grasp the idea of gravitational potential energy. Both are held above the table, with one at the table. We may now assert that the pencil that is higher than the table will have more gravitational potential energy.

Hence; potential energy of an object on earth's surface  can be increased by increasing mass of the object and by increasing height of the object.

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(a) The vertical height the sled reached above its starting point is 0.91 m.

(b) The sled's speed when it slides back down to its starting point is 18.43 m/s.

The maximum height reached by the sled is calculated by applying the following kinematic equation as follows;

H = u²sin²θ/2g

where;

H = (10² x (sin 25)²) / (2 x 9.8)

H = 0.91 m

The sled's speed when it slides back down to its starting point can be calculated by applying the following equation;

The time of flight of the sled is calculated as;

t = 2u sinθ / g

t = (2 x 10 x sin25) / 9.8

t = 0.86 s

The final velocity of the sled is calculated as;

v = u + gt

v = 10 + 9.8(0.86)

v = 18.43 m/s

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The number of photons emitted by the antenna was 78.47x 10^-31 photons per second

define photon?

A photon is an elementary particle that is a quantum of the electromagnetic field, including electromagnetic radiation like as light and radio waves, and the electromagnetic force's force carrier. Because photons have no mass, they always travel at the speed of light in vacuum, which is 299792458 m/s (or around 186,282 mi/s). The photon belongs to the boson class.

n=P/E

E=hf

=6.626x10^-34x10^6

=6.626x10^-28

n=520x10^3/6.626x10^-28

=78.47x10^31 photons per second

therefore the number of photons emitted by the antenna was =78.47x10^31

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Malicious code examples include computer viruses, worms, Trojan horses, logic bombs, spyware, adware, and backdoor programmes that take advantage of common system flaws. Malicious programmes can enter a system through visiting infected websites or by clicking on a dubious email link or attachment.

Viruses, Trojan horses, worms, macros, and scripts are examples of malicious programming. Email attachments, downloading files, and accessing compromised websites may all transmit malicious malware.

Phishing emails are by far the most popular way for hackers and state-sponsored hacking groups to disseminate malware. Hackers have gotten quite good at creating emails that fool recipients into clicking links or downloading files with harmful software.

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The supplied statement states that the sodium vapour lamp's volume is 20 LD torr.

From radio waves with wavelengths measured in meters to gamma rays with wavelengths shorter than around 1 1011 meters, electromagnetic radiation occurs throughout a very broad range of wavelengths.

Photons are bundles of something like the electromagnetic field which thus contain a set amount of energy and are the building blocks of light. You might count particles or even conduct measurements on something like a single photon using tests that are sensitive enough. Even light has been momentarily frozen by researchers.

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It is necessary to collimate the light source before using the prisim to  disperse the light so that the light rays entering the prisim are parallel.

What is collimate?

Collimator is a tool for converting a point source's divergent radiation into a parallel beam. To perform specific measurements in spectroscopy, geometrical optics, and physical optics, the light must be collimated.

An optical collimator is made up of a tube with a convex lens at one end and a variable aperture at the other end that is located in the lens' focal plane. To examine the image without parallax, radiation entering the aperture exits the collimator as a parallel beam.

Therefore collimation is needed for the light rays entering the prism to be parallel.

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The moment of inertia is I = 0.126*R^2*M

Then We can calculate the moment of inertia of an object that starts from rest and also has a final velocity using the energy conservation equation.

Then Ek1 + Ep1 is = Ek2 + Ep2, where

After that Ek1 is = the kinetic energy of the object before rolling down

Now Ep1 is = potential energy of the object

Then Ek2 is = kinetic energy when the object comes down

After that Ep2 is = the potential energy of the object at the bottom.

Now We have the following:-

Then Ek1 = 0

Ep1 = M*g*h

After that Ek2 = ((I*w)/2) + ((M*v^2)/2)

Then Ep2 = 0

Now we Replacing values is:

That is 0 + M*g*h = ((I*w)/2) + ((M*v^2)/2) + 0

where:

M is = mass of the object

g is = gravitational acceleration

I is = moment of the inertia

w is = angular velocity = v/R

h is = height

M*g*h is = ((1/2) * I * (v^2/R^2)) + ((M*v^2)/2)

M*9.8*2 is = (I*(5.9^2)/(2*R^2)) + ((5.9^2 * M)/2)

19.6 * M is = ((17.4*I)/R^2) + 17.4*M

Now We mention Clearing I, we have:

Therefore, I am = 0.126*R^2*M

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The wave characteristic that is the same for both waves is wavelength.

Thus, Equal frequencies are shared by two waves moving through the same region in the same direction.

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The displacement of the hamster is -5 feet.

In this case, we know that the hamster in the ball starts moving 5 feet to the left of the refrigerator walks 20 feet to the right of the refrigerator, and ends just in front of the refrigerator.

In fact, all quantities in physics can be divided into vector quantities and scalar quantities. A vector quantity has both magnitude and direction, while a scalar quantity has only magnitude and no direction. Vectors are indicated using directional designations in bold and arrows written above the vectors as is known. Note that displacement is related to the distance moved in a particular direction.

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Answer:

TRUE

Explanation:i've seen one and please make me the brainlest

Answer:   A

Explanation:

it is closer

The magnitude of the image of the convex mirror is 4.98m.

Convex mirror:

Convex Mirror is a curved mirror where the reflective surface bulges out toward the light source. This bulging-out surface reflects light outwards and is not used to focus light.

Here the focal length is 0.375m and object place is 0.431m.

We have to find the magnitude of the image.

We have the formula for mirror:

1/v + 1/u = 1/f

u = - 0.431

f = 0.375

So 1/v = 1/f - 1/u

          = 1/ 0.375 - 1/(- 0.431)

          = 1/0.375 + 1/0.431

          = 0.806/ 0.1616

          = 4.98m

Therefore we get the magnitude of image as 4.98m.

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The correct answer is The elastic potential energy of the spring will be two times greater than the gravitational potential energy of the object.

The formula for Gravitational potential energy is= mgh where

m=mass

g= 9.8

h=height.

On the other hand the formula for Elastic potential energy is (1/2)KX^2

where K is the spring constant and x is the displacement of the string. By changing the values of H and X, we will see elastic potential energy will remain more.

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The answer is C. The elastic potential energy of the spring will be two times greater than the gravitational potential energy of the object.

The power management required to maintain a constant indicated airspeed and ILS glide slope is lower than normal power initially, followed by a further decrease as the wind shear is encountered, then an increase

First the power is reduced than initial power, to correct the condition. As the aircraft proceeds through the wind shear, the power should further be reduced. After passing the wind shear the power is increased.

ILS stands for Instrument Landing System. It is a precision radio navigation system that provides guidance to aircraft in short range to approach the runway during night when vision is poor or when the weather is bad. The range is usually 200 feet above the ground.

Therefore, the power management required to maintain a constant indicated airspeed and ILS glide slope is lower than normal power initially, followed by a further decrease as the wind shear is encountered, then an increase

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The added wave must have the same amplitude the same wavelength and a phase difference of 180 degrees with respect to the original wave.

As turbulence or vibration increases in the medium the amplitude of the wave increases. Due to more vibrations, an increase in wavelength results in an increase in wave amplitude height. Wave amplitude is the wave height measured from the highest point of the wave to the lowest point of the wave.

Wavelength is the length of the wave from one peak to the next. Amplitude is the maximum disturbance from the equilibrium state of the medium. For horizontal string waves, this value is equal to half the vertical distance between the crests and troughs of the wave. The wavelength λ is the distance between two adjacent crests, expressed in meters. Amplitude is the strength of these radio frequencies. Finally, phase is the relationship shared by multiple radio signals sharing the same space and frequency.

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Answer:  i don't know

Explanation: because i'm in 6th grade

There are two varieties of bar-shaped rectangular magnets.

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When there is acceleration along the inclined plane then accelerations increase as incline angles increase.

angle of inclination :

The force component parallel to the incline rises as the angle increases, while the force component perpendicular to the incline falls. The acceleration is brought on by the parallel portion of the weight vector.

Therefore, accelerations increase as incline angles increase.

When there is acceleration along the inclined plane then accelerations increase as incline angles increase.

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The current drawn by the series circuit is(R₁ + R₂)/R₁R₂  times the current drawn by the parallel circuit.

Let the resistance of the two lamps are R₁ and R₂.

Then the equivalent resistance in series combination is: R = R₁ + R₂.

And,  the equivalent resistance in parallel combination is:

r = R₁R₂/(R₁ + R₂).

So, if the supply voltage is V,

Then, current drown in series combination; [tex]i_s[/tex] = V/R = V/(R₁ + R₂)

And, current drown in parallel combination; [tex]i_p[/tex] = V/r = V(R₁ + R₂)/R₁R₂

So ,[tex]\frac{i_s}{i_p}[/tex] = [ V/(R₁ + R₂)] /[V(R₁ + R₂)/R₁R₂]

=  (R₁ + R₂)/R₁R₂

Hence, the  ratio of current drawn in series and current drown in parallel is  (R₁ + R₂)/R₁R₂.  So, he current drawn by the series circuit is(R₁ + R₂)/R₁R₂  times the current drawn by the parallel circuit.

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The major difference between an open circulatory system and a closed circulatory system are-

Open circulatory system-

1. The tissues and organs are directly bathed with hemolymph.

2. It is impossible to distinguish between blood and interstitial fluid.

3. Present in arthropods and mollusks.

4. Body cavities receive blood pumps.

5. Present dorsal blood vessel

6. Lack of capillary system.

7. The tissues around it are in intimate contact with the blood.

8. Direct nutrient exchange occurs between the blood and tissues.

9. No gas transportation.

10.Hemolymph is the name of the fluid that circulates in this system.

Closed Circulatory System-

1. Within closed vessels, the blood flows.

2. Interstitial fluid and blood are different.

3. Present in both vertebrates and annelids.

4.The heart pumps blood through the vessels.

5. Both ventral and dorsal blood vessels are present.

6. A capillary system exists.

7. The tissues and blood do not come into direct contact.

8. The tissue fluid is used to exchange the nutrients.

9. Transport of gases occurs.

10. Blood is the fluid that circulates in this system.

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