An electromagnet would have the greatest strength if its wire were wrapped around a core made of.

Unit vectors along N, S, E, W are i , -i , j, -j .

To find unit vector along :

V1 = 2 m/s 30° N of E

V2 = 3 m/s 40° N of W

a )

\(v_1=2(cos\ 30^oi+ sin\ 30^oj)\\\\v_1=2(\dfrac{\sqrt{3}}{2}i+\dfrac{1}{2}j)\\\\v_1=\sqrt{3}i+j\)

b )

\(v_2=3(cos\ 40^oi+ sin\ 40^oj)\\\\v_2=3(0.77i+0.64j)\\\\v_2=2.31i+1.92j\)

Hence, this is the required solution.

Weight = (mass) x (gravitational acceleration where the mass is)

Weight = (1360 kg) x (9.8 m/s²)

Weight = 13,328  kg-m/s²

That's 13,328 Newtons

Given:-

To Find: Weight (W).

We know,

W = mg

where,

Thus,

W = (1360 kg)(9.8 m/s²)

→ W = 13,328 N (D)

Answer:

35%

Explanation:

Answer:

its 83

Explanation:

Impact of the car with the object. There are two collisions that happen during a crash, the first one is the impact of the car with the object and the second one is the impact of the passengers with the car's interior.

The main answer to the question is "a)

Both of these collisions are responsible for the injuries of the passengers and the extent of damage to the car. In the first collision, the car's energy is absorbed by the object or surface it collides with, causing damage to the car and the passengers inside.

The second collision is when the passengers' bodies collide with the interior of the car, including the steering wheel, dashboard, doors, windows, and so on. lt in death in severe cases.In conclusion, the main collision that happens during a crash is the impact of the car with the object, which causes damage to the car and the passengers inside.

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In a car crash, two collisions occur. The impact of the car with the object it hits, and the impact of the occupants with the interior of the car. The aim is always to lengthen these collisions to reduce the forces involved, hence reducing injuries.

During a car crash, there are primarily two collisions that happen. The first collision is the impact of the car with the object. This could be another vehicle, a tree, or a wall. The momentum of the car changes during this time, leading to an abrupt stop or change in direction. The force exerted on the car will be less if this collision time is prolonged, which is why cars are manufactured to crumple upon impact, resulting in a lengthier, less forceful collision.

The second collision occurs between the occupants of the car and the interior of the car. When the car abruptly stops or changes direction, the passengers continue to move at the original speed due to inertia. This might lead to impacts with the dashboard, windscreen, or seat in front. To decrease the force acted upon the bodies of the passengers during this second collision, car safety equipment such as seatbelts and airbags are used. These gadgets increase the collision time, hence reducing the force with which the passengers might collide with the car's interior.

Therefore, the correct response to your question would be the impact of the car with the object.

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Answer:

The gravitational potential energy is 150J

Explanation:

P. E=mgh

=5*10*3

Answer:

To find the force with which the cue ball will strike the other ball, you will need to use Newton's second law of motion, which states that the force acting on an object is equal to the mass of the object multiplied by its acceleration.

You can calculate the force using the following formula:

Force = mass * acceleration

Plugging in the values from your question, we get:

Force = 0.350 kg * 5.21 m/s^2 = 1.82 N

To convert the distance the cue ball travels from centimeters to meters, divide the distance by 100. So 175 cm is equal to 1.75 m.

I hope this helps!

Answer:

60 Ns

Explanation:

change in momentum = Fxt

6*10

60 Ns

A force of 6.0 N acts on a 4.0 Kg object for 10.0 s. The object's change in momentum is 60 kg-m/sec.

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.

change in momentum = force . time

change in momentum = 6 . 10 = 60

A force of 6.0 N acts on a 4.0 Kg object for 10.0 s. The object's change in momentum is 60 kg-m/sec.

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Answer:

friction

air drag

every thing that opposes the motion affects kinetic energy

Explanation:

kinetic energy is a energy which is increase with increase in motion and potential energy is energy stored while the object is at rest

potential energy ∝ 1/(kinetic energy)

as kinetic energy increases potential energy decreases

Answer:

The unit of current is defined as the flow of 1 coulomb of charge in one second

Answer:to protect an electrical circuit from damage caused by excess current from an overload or short circuit.

Explanation:

The better predictor of increase in force of contraction, change in semg amplitude of spikes.

A force in physics is an effect that has the power to alter an object's motion. 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.

Given that in the question the  better predictor of increase in force of contraction, change in semg amplitude of spikes or change in semg frequency of spikes.

The better predictor of increase in force of contraction, change in semg amplitude of spikes.

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Answer:

1.#potential energy = PE, m = mass in kg, g = force of gravity, h= vertical height above the ground.  ** means to the power of ie exponent. * means multiply.

PE = mgh

300 = m(10)(15)

m = 300/(10)(15)

m= 2kg

2. KE = 1/2 mv**2

     = 1/2(50)(50)**2

     = 2500 joules

Explanation

Is as in solution

Answer:

B. Atoms are altered in both processes

Explanation:

Answer: B. Atoms are altered in both processes

Explanation:

As n is not an integer, so there will be no constructive interference between the speakers, if speaker A is moved by minimum distance.

Interference is a phenomenon in which two waves combine by adding  displacement together at every single point in space and time and to form a resultant wave of greater, lower, or same amplitude.

Wavelength of a 500 Hz sound wave is the speed of sound (about 343 m/s) divided by the frequency of the sound, which is 343/500 m = 0.686 m. Therefore, minimum distance you can move speaker A to achieve constructive interference along x-axis is 0.686/2 m = 0.343 m.

Given, distance between the speakers is 6m. Constructive interference will occur when path difference between two waves is equal to integer multiple of the wavelength. To achieve constructive interference, distance between the speakers + the distance moved by speaker A should be equal to n*wavelength where n is integer.

So, 6 + 0.343 = n* 0.686

n = (6+0.343)/0.686 = 8.8

As n is not an integer, so there will be no constructive interference between the speakers, if speaker A is moved by minimum distance.

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Explanation:

F =(frac{1}{4{pi}{varepsilon}_o}) x (frac {q_1q_2}{r^2})

F =(frac {5 {times} 10 {times} 8 {times} 10}{0.002 {times} 0.002}) x 9 x 10

F = 900N

Answer:

I think the the answer is creating and layout and template style     ( C )

Explanation:

I did it before and i was checking my notes and i wrote that down , Hope this Helps :)

Answer:

a. heat your telescope, so its delicate optics are not cold

Explanation:

If star is just born and giving off  faint radiation in infrared. These radiation would be long range infra red radiation as the star is just born having less surface temperature.

In order to locate the star through telescope, it must be positioned at higher altitudes so that water vapor is minimum. The radiation from other heating objects might alter the light coming through the cosmos. Therefore, it is mandatory to shield the telescope from foreign radiations.

For the same reason mentioned above the telescope must have cold surroundings. Moreover, optics of the telescope must also be kept free from dust and dirt for clear vision.

However, Heating of telescope in order to safe optics from cold must not be done. This would change the wavelength of long range infra red radiations from star and hence, its location.

Answer:

The answer is "Option D"

Explanation:

Please find the graph file in the attached file.

Using formula:

\(\to v= \rho \lambda \\\\\ \to \lambda= 130 \cm \\\\ \to v= 335 \frac{cm}{s}\\\\ \to \rho= \frac{v}{\lambda} \\\\\)

      \(=\frac{335}{130} \\\\ = 2.57 \approx 2.50 \ Hz\)

Doppler effect is the shift in frequency as the object gets near an object/person or far away from an object or person.

Hope it helps!

The reactants have a higher potential energy and energy is released.

The potential energy graph shows a plot of the progress of a reaction. The hump on the graph is the activation energy of the reaction.

The statement that best describes the  total energy change of the system is that; reactants have a higher potential energy and energy is released.

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The electric field at the position of the electron is 2.12 × \(10^{4}\) N/C.

An electrically charged particle or set of particles is surrounded by an electric field, which is a force field. It is described as the amount of force per unit of charge that a charged particle would encounter in a field. Positive or negative electric fields are possible, and the size and dispersion of the charges that generate them determine how strong they are. Electric field lines, which describe the direction and strength of the force at each point in the field, can be used to illustrate them. Electric fields are crucial for many scientific applications, including particle accelerators and medical imaging, as well as for many daily technologies, like electrical power distribution, electronics, and telecommunications.

The electrostatic force on an electron is given by:

F = qE

where q is the charge of the electron and E is the electric field.

We know that the force acting on the electron is 3.4 × 10^-15 N, and the charge of an electron is 1.602 × 10^-19 C.

Therefore, the electric field can be found by rearranging the formula:

E = F/q

E = (3.4 × 10^-15 N)/(1.602 × 10^-19 C)

E = 2.12 × 10^4 N/C

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Answer:

its in this order 2,1,1

Explanation:

trust me bro

Answer:

221 is the actual answer

Explanation:

dont trust the person above me

It will take approximately 1.67 seconds for the car to go from a speed of 20.0 m/s to a speed of 25.0 m/s if the acceleration is 3.0 m/s².

\(v = u + at\)

Given:

u = 20.0 m/s (initial velocity)

v = 25.0 m/s (final velocity)

a = 3.0 m/s² (acceleration)

Rearranging the equation, we get:

\(t= \frac{(v - u)}{a}\)

Substituting the given values:

t =  \(\frac{(25.0 m/s - 20.0 m/s)}{3.0 m/s^{2} }\)

t = 1.67 s

Speed is the measure of the rate at which an object moves. It is defined as the distance an object travels per unit of time. Speed is a scalar quantity and is expressed in units of distance per unit of time, such as meters per second (m/s) or kilometers per hour (km/h). It is important to note that speed does not tell us anything about the direction of motion or any changes in direction. This is where velocity comes in, which is a vector quantity that includes both speed and direction.

Speed can be either average or instantaneous. Average speed is the total distance traveled divided by the total time taken, while instantaneous speed is the speed at a particular instant in time. Speed can also be described in terms of velocity, which includes direction as well as magnitude.

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The strength of the magnetic field at the centrer of coil is calculated to be 1.97× 10⁻⁷ Tesla

A magnetic field is a vector field that explains the magnetic impact on moving charges, currents, and magnetic materials. A moving charge in a magnetic field is subjected to a force that is perpendicular to both its own velocity and the magnetic field.

We know that for a circular wire the magnetic field at the center is given by

B= μI/2r

Here, μ= 4π×10⁻⁷

I= current flowing= 0.15A

r= radius of the circular wire

In the given question the wire of length 3m is bent into a circular coil of one turn.

So, the circumference of coil will be equal to the length of the coil.

Length= circumference= 2πr

2πr= 3m        (π≅3.14)

r=  \(\frac{3}{2* 3.14}\)= 0.477 m

Now putting the value of r= 0.477 m in magnetic field formula we get

B= \(\frac{4\pi }{2* 0.477}\)×10⁻⁷

B= 1.97× 10⁻⁷ Tesla

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Answer:

9

Explanation:

You divide the joules by the coulombs to find the voltage of the battery so, 27/3= 9

Here,

Size of object = 1.5 m;

Object distance (u) = - 2m = -200cm

focal length (f) = - 3.0 cm

Image distance (v) = ?

Using lens formula

Now magnification is given by

Final answer is :-

Image distance = - 2.96 cm & magnification = 0.0148

Answer:

B) Caused by the Sun

Explanation:

If you look at a picture of a solar system, you will see the sun in the middle. The sun is the powerhouse of the solar system. So that means that the sun is the biggest star and can provide enough light to reach earth and keep it lit.

The meaning of the word solar in the article "Fire Up the Sun" is caused by the sun so, option B is correct.

The sun is the star that the earth and the other planets in the solar system orbit. With more than 99 percent of the system's total mass, it is the dominant body. A portion of the tremendous quantity of energy coming from the Sun powers the light and heat that keep Earth habitable for life.

The sun is in the center of a solar system if you look at a picture of one. The solar system's center of gravity is the sun. This indicates that the sun is the largest star and that it can illuminate the earth and keep it bright.

The Sun is a G2 V star, which means that it has a surface temperature of roughly 5,800 kelvins (K), making it the second-hottest star in the yellow G class.

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It's essential to terminate coaxial cables with connectors rated for the exact cable type because it ensures optimal performance, signal integrity, and impedance matching.

Terminating a coaxial cable with connectors that are rated for the exact cable type is important because it ensures optimal performance and signal integrity. Coaxial cable is designed to carry high-frequency signals, and the connectors play a crucial role in maintaining the quality of those signals. Different cable types have different electrical characteristics, such as impedance, capacitance, and attenuation, and using the wrong connectors can lead to impedance mismatches, signal loss, interference, and other issues. For example, if you use connectors with a higher impedance rating than the cable, it can cause reflections and reduce the amount of power that reaches the destination. On the other hand, if you use connectors with a lower impedance rating, it can cause signal distortion and reduce the signal-to-noise ratio. Therefore, it is important to choose connectors that match the cable type and meet industry standards to ensure reliable and consistent performance.
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