The current source has an EMF of 14 V and an internal resistance of 1Ω. Two resistors with resistances of 3Ω are connected to the current source. How much current flows in the circuit?

a) See attached

b) The block's weight has magnitude

mg = (25 kg) (9.8 m/s²) = 245 N

and we split this vector into components acting parallel and perpendicular to the incline, with magnitudes

• parallel : mg sin(40°) ≈ 157 N

• perpendicular : mg cos(40°) ≈ 188 N

Take "down the plane" to be the positive parallel direction, and the direction of the normal force to be the positive perpendicular direction. Then these components of the weight are positive and negative,

• parallel : mg sin(40°) ≈ 157 N

• perpendicular : mg cos(40°) ≈ -188 N

c) The net force acting parallel to the incline is

∑ F[para] = mg sin(40°) - f = 0

where f is the magnitude of kinetic friction. The net force is zero since the block slides at a constant speed.

d) Solve the equation in (c) for f :

f = mg sin(40°) ≈ 157 N

e) The magnitude of kinetic friction f is proportional to the magnitude of the normal force n by a factor of µ, the coefficient of friction.

f = µn

The net force on the block acting perpendicular to the incline is

∑ F[perp] = n - mg cos(40°) = 0

and it follows that

n = mg cos(40°) ≈ 188 N

Solve for µ :

157 N = µ (188 N)   ⇒   µ ≈ 0.84

The viscosity of the oil with a torque 4Nm and a rotational speed is 30 rpm is 0.2003 N.s/m.

From the given,

torque = 4Nm

rotational speed = 30 rpm = (30 × 3.14)/60 = 3.14 rad/sec

radius = 0.15 m

thickness (h) = 0.003 m

To find linear velocity,

V = R×ω

  = 0.15×3.14

V =0.471 m/s

The dragging force,

F = 2μA(V/h)   (V is linear velocity and h is the thickness )

Area = area of cylinder = 2πRH, R is radius and H is the height of the cylinder.

F = 2μ(2πRH) (V/h)

  = 2μ(2×3.14×0.15×0.45) (0.471/0.003)

  = 133.10 μ   (μ is the viscosity of the oil)

F = 133.1μ

Torque (τ) = Force × radius

      4 Nm   = 133.1μ × 0.15

  μ  = 4 / (133.1×0.15)

      = 0.2003 N.s/m

The viscosity of the oil is 0.2003 N.s/m.

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Mimicry. This is when oraganisms imitate another oraganism whether it be physical or behavoioral.

Answer:

4.8mph

Explanation:

Speed= Distance/time

Speed= 26.2/5.5

= 4.76mph

( To the nearest tenth ) = 4.8mph

Answer:

38.7 mph

Explanation:

I just add all the numbers together then divided them by 4, which is the amount of numbers you gave.

Answer:

C= 50km/hr west

Explanation:

150/3= 50

Because it asks for velocity, make sure to include the direction as well.

Answer:

The term 'mettaloid' is normally applied to a group of between six and nine elements ;

are found near the center of the P-block or main block of the periodic table.

Explanation:

Answer:

A

Explanation:

Momentum change is basically impulse

Object possessing more velocity after bouncing OR the object which bounces more have more impulse

When the wildebeest pick up their race again, they will be 83.82 meters from the end zone (a). The speed of the gazelle is 15.0 m/s (b) The wildebeest remained motionless for 450 seconds.

Velocity is the pace and velocity of an object's mobility, whereas speed is the forecasting at which an element is travelling along a path.

Distance, S = 1.90 Km

= 1900 m

S1 = 1.520 km

= 1520 m

Speed V1 = 15 m/s

V2 = 3.30 m/s

Time, t1 = S1/t1

= 1520/15

= 101 s

t2 = 380/15

= 25.4 s

T = S/ V2

= 1900/3.3

= 576 s

(a) distance = 3.3 * 25.4

= 83.82 m

(b) Time = T -(t1 + t2)

= 576 -126.4

= 449.6

= 450 s

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The material that the magnet attracts is Iron and hence the ideal solution is option D.

The magnet is the material that produces the magnetic field on its own. The magnetic field is the invisible field but it has the ability to attract other materials. Magnets are made up of ferromagnetic materials.

Ferromagnetic materials are materials that are permanently magnetized due to the unpaired electrons in the materials. Most of the Ferromagnetic materials are metals namely nickel, iron, etc.

When the magnet is brought close to the iron, the electrons in the iron are aligned in the direction of the magnetic field which makes the iron become magnetized. Thus, the attraction takes place between two magnetized objects.

Thus, the ideal solution is option D) Iron.

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Answer:

\(\boxed {\boxed {\sf 3.75 \ seconds }}\)

Explanation:

Average acceleration is found by dividing the change in acceleration by the time.

\(a=\frac{ v_f-v_i}{t}\)

The shuttle bus has an acceleration of -2.4 meters per square second. It slows from 9.0 meters per second to rest, or 0 meters per second. Therefore:

\(a= -2.4 \ m/s^2 \\v_f= 0 \ m/s \\v_i= 9 \ m/s\)

Substitute the values into the formula.

\(-2.4 \ m/s^2=\frac{0 \ m/s - 9 \ m/s}{t }\)

Solve the numerator.

\(-2.4 \ m/s^2 = \frac{-9 \ m/s}{t}\)

We want to solve for t, the time. We have to isolate the variable. Let's cross multiply.

\(\frac{-2.4 \ m/s^2}{1} = \frac{-9 \ m/s}{t}\)

\(-9 \ m/s *1= -2.4 \ m/s^2 *t\)

\(-9 \ m/s=-2.4 m/s^2*t\)

t is being multiplied by -2.4. The inverse of multiplication is division, so divide both sides by -2.4

\(\frac{-9 \ m/s }{-2.4 \ m/s^2} =\frac{ -2.4 \ m/s^2*t}{-2.4 \ m/s^2}\)

\(\frac{-9 \ m/s }{-2.4 \ m/s^2} =t\)

\(3.75 \ s=t\)

It takes 3.75 seconds.

Given:

m= 80 kg

r= 16 m

v= 2m/s

Apply:

Replacing:

Fc = 20 kgm/s^2 = 20 N

The molality of a solution prepared from 5.25 g LiF and 45.0 g H2O is 4.49 m LiF.

Molality is useful in many chemical applications, particularly in the study of colligative properties of solutions. Colligative properties are properties of solutions that depend only on the concentration of solute particles and not on their chemical identity. Examples of colligative properties include boiling point elevation, freezing point depression, and osmotic pressure.

Molality is often used in laboratory settings where accurate measurement of concentration is important. It is also used in industrial processes such as the production of pharmaceuticals, where precise control of concentration is critical. In summary, molality is an important measure of concentration that is widely used in chemistry to describe the properties and behavior of solutions.

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Complete Question: -

Molality is a common unit of concentration which is used when temperature changes are a factor since its value will not change with temperature.

Molality is calculated by determining the number of moles of the solute, or the substance being dissolved, in 1 kilogram of solvent. This is summarized as follows:

Molality (m) = moles of solute/1 kg of solvent

What is the molality of a solution prepared from 5.25 g LiF and 45.0 g H2O?

The amount of the work done will be 100 J. Work done is denoted by W.

Work done is defined as the product of applied force and the distance through which the body is displaced on which the force is applied.

Work may be zero, positive and negative.it depends on the direction of the body displaced. if the body is displaced in the same direction of the force it will be positive.

The given data in the problem is;

F is the force applied = 20 N

d is the displacement = 5.0 m

The work done is found as;

W = F × d

W =  20 N × 5

W= 100 J

Hence, the amount of work done will be 100 J.

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Answer:

lifts the basket, 40J

Explanation:

Answer: hi your question is incomplete attached below is the complete question

answer :

Explanation:

Using the information provided in the question attached I will match each term with its corresponding meaning

Answer:

A

Explanation:

acceleration = velocity / time

Hope that helps

Answer:

D

Explanation:

Average acceleration = final velocity- initial velocity, divided by elapsed time.

ā = V - Vo/t

= change in velocity ÷ change in time

Given that the internal energy change is -20KJ the change in enthalpy is : -17 KJ

Given data :

P1 = 7 kPa

P2 = 4 kPa

V1 = 3 m³

V2 = 6 m³

Applying the relationship below

Change in enthalpy = change in internal energy + ( P2V2 - P1V1 )

                                 = -20 + ( 4*6 - 7*3 )

                                 = -20 + ( 24 - 21 )

                                 = - 17 KJ

Hence we can conclude that the change in enthalpy is : -17 KJ

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Answer:

F₁ = 4 F₀

Explanation:

The force applied on the string by the ball attached to it, while in circular motion will be equal to the centripetal force. Therefore, at time t₀, the force on ball F₀ is given as:

F₀ = mv₀²/r   --------------- equation (1)

where,

F₀ = Force on string at t₀

m = mass of ball

v₀ = speed of ball at t₀

r = radius of circular path

Now, at time t₁:

v₁ = 2v₀

F₁ = mv₁²/r

F₁ = m(2v₀)²/r

F₁ = 4 mv₀²/r

using equation (1):

F₁ = 4 F₀

Never put a weight directly on the balance pan. Always cover it with a piece of weight paper. Never add chemicals to a container or piece of weighing paper while it is on the scale. Never weigh something that is hot or cold.

The amount of matter that makes up every object or body is the greatest way to understand mass. Everything that we can see has mass. Examples of objects with mass include a table, a chair, your bed, a football, a glass, and even air. Whether anything is light or heavy depends on its mass.

Mass is independent of place. Using a formula, can one estimate an object's mass based on its weight.  corresponds to mass dividing weight by gravitational acceleration Determine the weight in pounds that is equivalent in Newtons. The formula used to determine mass based on weight expresses mass in Newtons.

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The quarterback is getting hit with a force of 100 Newtons.

We can use Newton's second law of motion:

Force = Mass * Acceleration

Given that the mass of the defensive lineman is 100 kg and the acceleration is 1 m/s², we can substitute these values into the equation:

Force = 100 kg * 1 m/s²

Force = 100 N

Therefore, the quarterback is getting hit with a force of 100 Newtons.

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In a DC generator, the generated electromotive force (emf) is directly proportional to the rotational speed of the generator's armature and the strength of the magnetic field within the generator.

This relationship is described by the equation for the generated emf in a DC generator:

Emf = Φ * N * A * Z / 60

Where:

Emf is the generated electromotive force (in volts),

Φ is the magnetic flux density (in Weber/meter^2\(meter^2\) or Tesla),

N is the number of turns in the armature winding,

A is the effective area of the armature coil (in square meters),

Z is the total number of armature conductors, and

60 is a constant representing the conversion from seconds to minutes.

From this equation, we can see that the generated emf is directly proportional to the magnetic flux density (Φ) and the product of the number of turns (N), effective area (A), and the total number of armature conductors (Z). This means that increasing any of these factors will result in a higher generated emf.

The magnetic flux density (Φ) can be increased by using stronger permanent magnets or increasing the strength of the field windings in the generator.

The number of turns (N) and the effective area (A) are design parameters and can be optimized for a specific generator. Increasing the number of turns or the effective area will result in a higher generated emf.

Similarly, the total number of armature conductors (Z) can be increased to enhance the generated emf.

By controlling and optimizing these factors, the generated emf in a DC generator can be increased, resulting in higher electrical output. However, it is important to note that there are practical limits to these factors based on the design and construction of the generator.

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Answer:

Explanation:

Here we are given Mass of the object is 3000 kg and velocity is 300 m/s. and we need to calculate the Kinetic energy.

Formula of Kinetic energy is given by:

\(\: \: \: \: \dashrightarrow \: \: \: { \underline{ \boxed{ \sf{KE = \dfrac{1}{2} mv^2 }}}}\)

Where,

On substituting the required values in above formula, we get:

\(\\ \: \: \: \dashrightarrow \: \: \: \sf KE = \dfrac{1}{2} \times 3000 \times (300)^2 \\ \\ \\ \: \: \: \dashrightarrow \: \: \: \sf KE = \dfrac{1}{2} \times 3000 \times 90000 \\ \\ \\ \: \: \: \dashrightarrow \: \: \: \sf KE = \dfrac{1} {\cancel{{2}}} \times { \cancel{3000}} \times 90000 \\ \\ \\ \: \: \: \dashrightarrow \: \: \: \sf KE =1500 \times 90000 \\ \\ \\ \: \: \: \dashrightarrow \: \: \: {\underline{\boxed{\sf{ KE =135000000 \: J}}}} \\ \\ \\ \)

Answer:

\( \sf {\Large{ \purple{The \: kinetic \: energy \: of \: the \: object \: is \: 1.35 \times {10}^{8}J }}}\)

Explanation:

\( \textsf{ \underline{ \red{ \large{To find :-}}}}\)

The kinetic energy of a moving object

\( \textsf{ \underline{ \pink{ \large{Given :-}}}}\)

Mass of the object (m) = 3000kg

velocity of the object (v) = 300m/s

\( \textsf{ \huge{ \underline{ \underline{ \blue{Solution :-}}}}}\)

\( \sf Kinetic \: energy \: (K.E.) = \frac{1}{2} m {v}^{2} \\ \sf K.E. = \frac{1}{2} \times 3000 \times {300}^{2} \\ \sf K.E. = \frac{1}{2} \times 3000 \times 300 \times 300 \\ \sf K.E. = 3000 \times 300 \times 150 \\ \sf K.E. = 135,000,000 \\ \textsf{(J = joule)} \\ \sf{ \green{ K.E. = 1.35 \times {10}^{8}J }}\)

The question above wants to assess your ability to simplify concepts. For that reason, it's not right for me to simplify these concepts for you, but I'll show you how to do it.

First, it is necessary for you to research these two topics, to understand their meaning and the main points that make them up.

You can do this research in textbooks, aimed at high school and middle school, as they usually present scientific concepts more clearly.

After that you can explain these topics as follows:

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Answer:

Explanation:

No da esta aplicación y si para que usted vella

Answer:

630dB

Explanation:

First you must know that the relationship between the sound intensity and the distance is an inverse relationship.

Let I represent the sound intensity

d represent the distance

Since I is inversely proportional to d, hence;

I ∝ 1/d

I = k/d

k is the constant of proportionality

If the whistle has a sound intensity of 90 dB when the boat passes you 7 m away, this means;

when I = 90dB, d = 7m

Substitute and get k first;

I = k/d

90 = k/d

k = 90 * 7

k = 630

To get how loud (in dB) is it in the cockpit just 1 m from the whistle, we will find I when d = 1 m

From the expression I = k/d

k = 630, d = 1

I = 630/1

I = 630dB

Hence the intensity is 630bB loud in the cockpit when it is just 1m from the whistle.

When an object experiences balanced forces on Earth, it would be at rest (option A).

Balanced forces are those forces that are opposite in direction and equal in size. They are considered as a state of equilibrium. Balanced forces are unable to change the motion or direction of an object i.e. they keep an object moving at a constant velocity. 

When forces are balanced, they cancel each other out, resulting in no change in motion for the object they are acting on. Unbalanced forces do not cancel each other out, and result in a change in motion for the object they are acting on.

The characteristics of balanced forces are as follows:

This suggests that an object on Earth will remain at rest if it experiences balanced forces.

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The probability of all the coins landing on tails or that I roll a 10 is The probability of getting less that 0.2

Probability can be explained as the  measure of the likelihood of an event which is about to take place.

It should be noted that  Many events cannot be predicted  having full  total certainty but in some cases can be  predicted with regards with the only the chance of an event to occur.

The possible outcomes that can be gotten if the  three coins are tossed will be  = 23=8

favorable outcome  that can be gotten will be ( HTT, THT, TTH)

probability of having  one head  will be  P(A) = 3/8

The possible outcomes  of a dice  when it is been thrown is  6 which is (1,2,3,4,5,6)

The favorable  of having even number (event B)  with the  dice will be 3 which is  (2,4,6)

The  probability of having the  even number which is  P(B) will be  3/6 = 1/2

Then the P(AB) = P(A)P(B) = (3/8 * 1/2) = 3/16

= 0.1875

Hence the  probability of all the coins landing on tails or that I roll a 10 is The probability of getting less that 0.2

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CHECK THE COMLETE QUESTION BELOW:

The probability is less than 0.20

The probability is greater than 0.22

The probability is between 0.21 - 0.22

The probability is between 0.20 -0.21

The probability is less than 0.10

It can't be determined

Answer:

516526.863 m

Explanation:

From the question given above, the following data were obtained:

Acceleration due to gravity (g) = 2.24 m/s²

Mass (M) = 8.96×10²¹ Kg

Gravitational constant (G) = 6.67×10¯¹¹Nm²/Kg²

Radius (r) =?

The radius of the planet can be obtained as follow:

g = GM/r²

2.24 = 6.67×10¯¹¹ × 8.96×10²¹ / r²

2.24 = 5.97632×10¹¹ / r²

Cross multiply

2.24 × r² = 5.97632×10¹¹

Divide both side by 2.24

r² = 5.97632×10¹¹ / 2.24

r² = 2.668×10¹¹

Take the square root of both side

r = √2.668×10¹¹

r = 516526.863 m

Thus, the radius of the planet is 516526.863 m

Answer:

gpe gained = 60J

Explanation:

gravitational potential energy  =  mass * gravity * height

gpe =  2 kg * 10 N * 3 m

gpe = 60J