five resistors, each 10 ω, are connected in parallel to a voltage source. the current at each branch is measured to be 600 ma. what is the potential difference supplied by the voltage source? Group of answer choices
20 Ω
5 Ω
2 Ω
50 Ω

The magnification of the image is -1, which means that the image is inverted with respect to the object.

Part A:
The mirror should be placed at a distance of 2r from the object so that a real image is formed on the wall. This is because, for a concave mirror, when the object is placed at a distance equal to the radius of curvature, the image formed is at the same distance on the other side of the mirror. So, the distance from the object to the mirror would be r, and the distance from the mirror to the image would also be r. Therefore, the total distance from the object to the image would be 2r.

Part B:
The magnification of the image can be calculated using the formula:

m = - di/do

where di is the distance of the image from the mirror and do is the distance of the object from the mirror. Since the image is formed on the wall, which is at a distance equal to the radius of curvature of the mirror, di = r. And, as mentioned earlier, the distance of the object from the mirror is also r. Substituting these values in the above formula, we get:

m = - r/r = -1

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When a high mass star finishes fusing the hydrogen in the core and begins fusing helium in the core, it will become a blue supergiant.

As the high mass star begins fusing helium in the core, it will start to produce heavier elements in its core through nuclear fusion.

The increase in energy production will cause the star to expand and become much brighter, leading to its classification as a blue supergiant. Eventually, the star will exhaust its supply of helium and begin fusing heavier elements, leading to a series of stellar evolution phases before ending its life in a supernova explosion.

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The time taken for the coffee to cool from 93°C to 73°C is approximately 36.1 minutes.

The cooling law is given by:

$$\frac{dQ}{dt}=-k(T-T_0)$$

where Q is the heat in the object, t is the time taken, T is the temperature of the object at time t, T0 is the temperature of the environment and k is a constant known as the cooling constant.

We need to find the time it takes for the coffee to reach a drinking temperature of 73°C given that its initial temperature is 93°C.

Therefore, we need to find the time it takes for the coffee to cool down from 93°C to 73°C when placed in a room temperature of 18°C.

Let’s assume that the heat energy that is lost by the coffee is equal to the heat energy gained by the environment. We can express this as:

dQ = - dQ where dQ is the heat energy gained by the environment.

We can substitute dQ with C(T-T0) where C is the specific heat capacity of the object.

We can rearrange the equation as follows:

$$-\frac{dQ}{dt}=k(T-T_0)$$

$$-\frac{d}{dt}C(T-T_0)=k(T-T_0)$$

$$\frac{d}{dt}T=-k(T-T_0)$$

The differential equation above can be solved using separation of variables as follows:

$$\frac{d}{dt}\ln(T-T_0)=-k$$

$$\ln(T-T_0)=-kt+c_1$$

$$T-T_0=e^{-kt+c_1}$$

$$T=T_0+Ce^{-kt}$$

where C = e^(c1).

We can now use the values given to find the specific value of C which is the temperature difference when t=0, that is, the temperature difference between the initial temperature of the coffee and the room temperature.

$$T=T_0+Ce^{-kt}$$

$$73=18+C\cdot e^{-0.09t}$$

$$55=C\cdot e^{-0.09t}$$

$$C=55e^{0.09t}$$

$$T=18+55e^{0.09t}$$

We can now solve for the value of t when T=93 as follows:

$$93=18+55e^{0.09t}$$

$$e^{0.09t}=\frac{93-18}{55}$$

$$e^{0.09t}=1.3636$$

$$t=\frac{\ln(1.3636)}{0.09}$$

Using a calculator, we can find that the time taken for the coffee to cool from 93°C to 73°C is approximately 36.1 minutes.

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The answer is five dots.

sorry i  meant three dots not five

Hi there!

To find how much the spring stretches with the mass attached, we must find the spring's equilibrium point.

The equilibrium point satisfies the following:

\(\large\boxed{\Sigma F = 0}\)

The two forces acting in this situation are the weight of the mass and the spring force.

The spring force (restoring force) is in the opposite direction of the weight, so:

\(\Sigma F = 0 = Mg- k\Delta x\)

Mg = weight

k = Spring Constant (N/m)

Δx = distance to equilibrium point (m)

Now, we can set the two equal to each other:

\(Mg = k\Delta x\\\\544 = 1146\Delta x\\\\\boxed{\Delta x= .475 m}\)

When a woman pulls on a 6.00-kg crate connected to a 4.00-kg crate by a taut light rope, the lighter 4.00-kg crate experiences a greater acceleration than the 6.00-kg crate due to its lower mass.

When a woman pulls on a 6.00-kg crate connected to a 4.00-kg crate by a taut light rope, the lighter 4.00-kg crate experiences a greater acceleration than the 6.00-kg crate. This is because the force applied by the woman is distributed equally between the two crates, but the lighter crate has less mass. According to Newton's second law of motion, the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.
In this case, both crates experience the same net force since they are connected by a light rope. However, the 4.00-kg crate has less mass compared to the 6.00-kg crate. As a result, the lighter crate experiences a greater acceleration. This can be explained by the equation F = ma, where F is the force, m is the mass, and a is the acceleration.
To visualize this, imagine if you were to push a car and a bicycle with the same force. The bicycle, being much lighter, would accelerate faster compared to the car due to its lower mass. Similarly, in this scenario, the lighter 4.00-kg crate accelerates more than the 6.00-kg crate when pulled by the woman.
In summary, when a woman pulls on a 6.00-kg crate connected to a 4.00-kg crate by a taut light rope, the lighter 4.00-kg crate experiences a greater acceleration than the 6.00-kg crate due to its lower mass.

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The area of the given lot is approximately 2.1567 acres.

To calculate the area of the lot in acres, we first need to convert the given measurements from feet to acres.

1 acre is equivalent to 43,560 square feet.

Given:

Length = 248.4 feet

Width = 378.90 feet

Area = Length x Width

Converting the area to acres:

Area_acres = (Area_square_feet) / 43,560

Substituting the given values:

Area_acres = (248.4 feet x 378.90 feet) / 43,560

Calculating this expression:

Area_acres = 93991.16 square feet / 43,560

Area_acres ≈ 2.1567 acres

Therefore, the area of the given lot is approximately 2.1567 acres.

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Answer:

The maximum height above the ground the rocket reaches is 123.1 m.

Explanation:

Let's find the final velocity at a distance of 200 m:

\( v_{f}^{2} = v_{0}^{2} + 2ad \)

Where:

\(v_{f}\) is the final speed =?

v₀ is the initial speed =0

a is the acceleration = 1.25 m/s²

d is the distance = 200 m

\(v_{f} = \sqrt{2ad} = \sqrt{2*1.25 m/s{2}*200 m/s} = 22.4 m/s\)    

Now, when the engines of the rocket turn off and it is subject only to gravity, the height reached is:

\( v_{fy}^{2} = v_{0y}^{2} - 2gh \)

Where:

\(v_{f}\) = 0

\(h = -\frac{v_{fy}^{2} - v_{0y}^{2}*sin(\theta)}{2g} = \frac{(22.4*sin(35))^{2}}{2*9.81 m/s^{2}} = 8.4 m\)

Finally, the maximum height above the ground is:

\( h_{max} = h + H \)

Where H is the vertical component of the 200.0 meters.

\(h_{max} = h + H = 8.4 m + 200.0 m*sin(35) = 123.1 m\)

Therefore, the maximum height above the ground the rocket reaches is 123.1 m.

I hope it helps you!                                                          

Answer:

When you're talking on a cell phone, it converts your voice into a signal that is transmitted via radio waves to the nearest cell tower. The cell tower then relays the radio wave back to the person you're speaking to, converting it first to a signal and then back to sound again.

Explanation:

no explanation for you

but the answer is in the top!

Answer:

vote me brainliest

Explanation:

The magnitude B of the magnetic field at the center of the semicircles is given by these expression B = (μ₀(I(outer) - I(inner)))/(π(a + b)). The B in terms of the asked variable.

In this case, we have two concentric semicircles, each carrying current in opposite directions. Let's consider a circular loop with radius r, where a < r < b. The magnetic field at the center of this loop will be the sum of the magnetic fields produced by the two semicircles.

For the outer semicircle (radius b), the magnetic field at the center can be calculated as follows:

∮ B · dl = μ₀I(outer)

For the inner semicircle (radius a), the magnetic field at the center has the opposite direction, so the equation becomes:

∮ B · dl = -μ₀I(inner)

Since the circular loop with radius r contains both the inner and outer semicircles, we can add these equations together:

∮ B · dl = μ₀(I(outer) - I(inner))

The line integral ∮ dl represents the circumference of the circular loop, which is 2πr:

B(2πr) = μ₀(I(outer) - I(inner))

B = (μ₀(I(outer) - I(inner)))/(2πr)

In this case, as we are interested in the magnetic field at the center of the semicircles, the radius r would be the average radius between a and b, given by:

r = (a + b)/2

Substituting this value into the equation, we get the final expression for the magnitude B of the magnetic field at the center of the semicircles:

B = (μ₀(I(outer) - I(inner)))/(2π((a + b)/2))

B = (μ₀(I(outer) - I(inner)))/(π(a + b))

Therefore, the magnitude B of the magnetic field at the center of the semicircles is given by B = (μ₀(I(outer) - I(inner)))/(π(a + b)).

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(a) the speed of the electron is 1.79 × 10^7 m/s.

(b) the radius of the path of the electron in the magnetic field is 0.034 m.

To solve this problem, we can use the following equations:

(a) The kinetic energy of the electron after being accelerated by the potential difference is given by:

KE = qV

where q is the charge of the electron and V is the potential difference. Since the electron is negatively charged, q = -1.602 ×\(10^{-19}\) C. Substituting the values given in the problem, we have:

KE = (-1.602 × 10^-19 C)(412 V) = -6.6 ×\(10^{-17}\) J

This kinetic energy is equal to the kinetic energy of the electron in the magnetic field, so we can equate it to the expression for kinetic energy in terms of speed:

KE = (1/2)m\(v^2\)

where m is the mass of the electron and v is its speed. Rearranging the equation and substituting the values, we get:

v = \(\sqrt[2]{(2KE)/m}\) = sqrt((2(-6.6 × 10^-17 J))/(9.109 × 10^-31 kg)) = 1.79 × 10^7 m/s

(b) The radius of the path of the electron in the magnetic field is given by:

r = (mv)/(qB)

where B is the magnitude of the magnetic field. Substituting the values given in the problem, we get:

r = ((9.109 × \(10^{-31}\) kg)(1.79 × \(10^7\) m/s))/(1.602 × \(10^{-19}\)C)(208 mT) = 0.034 m

What is magnetic field?

A magnetic field is a region of space around a magnet or a current-carrying conductor where a magnetic force is exerted on magnetic materials or moving charges.

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Answer:

Erosion is the geological process in which earthen materials are worn away and transported by natural forces such as wind or water.

Explanation:

Destructive waves erode through four main processes; Hydraulic Action, Compression, Abrasion and Attrition.

Answer:

Below! ;)

Explanation:

Lots of people have the idea that erosion is where something is eroded away, and EVEN I thought that once, but erosion is the process in which parts of land are moved to a different province. Erosion can sometimes also bring in invacious species.

Hope this helps!

Have a nice day!

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Answer:

Friction is ur ans

Explanation:

Friction is the external force that acts on objects and causes them to slow down when no other external force acts upon them. Inertia is the tendency of a body in motion to remain in motion.

Inertia causes an object in motion to remain in motion as per the law of inertia.

Motion is defined as a phenomenon which is described with respect to change in object's position with respect to time.It is given in terms of displacement,velocity,distance ,acceleration,speed.

Branch of physics which deals with motion of objects without any reference to it's cause is called kinematics while the branch which studies forces and their effects on motion is called as dynamics.

Motion applies to various systems like objects,bodies, matter particles ,radiation ,curvature.There are three laws of motion which are proposed by Newton.Classical mechanics is based on Newton's law of motion.Relativistic  mechanics is based on modern kinematics.

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Answer:

3.6 kg*m^2/s

Explanation:

The angular momentum equals mvr, where m is the mass, v is the velocity, and r is the radius or rotational arm. Inputting these values, we can find the angular momentum.

Angular momentum = (1.5 kg)(3.0 m/s)(0.8 m) = 3.6 kg*m^2/s

I hope this helps! :)

Answer:

3.6 kg is the answer

Explanation:

becuase 8/3 = 3.6

Answer:

Assuming starting at zero velocity: at 4 seconds speed is 8 m/s (2m/s^2 * 4 seconds) and distance is 16 m (average speed is 4 m/s * 4 seconds). The remaining 84 meters (at 8 m/s) takes 10.5 seconds.

So total time to run 100 meters is 14.5 seconds.

Explanation:

Answer:

50%.......

Explanation:

is the correct check it then send feedback

An object in motion is an object that is changing position relative to its surroundings.

Correct option is C.

For example, if one were to observe a ball rolling along the ground, the ball would be considered to be an object in motion. This is because the ball is changing position relative to its surroundings as it moves forward. Thus, if an object is moving in a certain trajectory, it is in motion. This motion may be linear, rotational, or even curvilinear.

Additionally, the object may be accelerating or decelerating. In any event, the object is still considered to be in motion as long as its position relative to its surroundings is changing. Although objects may remain still, objects at rest are not considered to be in motion.

Correct option is C.

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(if im wrong just report my answer)

the main ways I would suspect them proppeling forward would be by putting their foot down and pushing with it or my going downhill.

Answer:

The energy that can be stored in the capacitor is 239 nJ

Explanation:

We first calculate the capacitance of each material. Let C₁ be the capacitance of pyrex glass and C₂ be the capacitance of polystyrene.

C₁ = κ₁ε₀A/d where κ₁ = dielectric constant of pyrex glass = 5, A = area of plates = L² where L = length of square plate = 7.40 cm = 7.40 × 10⁻² m and d = thickness of pyrex slab = 1.60 mm = 1.60 × 10⁻³ m and ε₀ = permittivity of free space = 8.854 × 10⁻¹² F/m

C₁ = κ₁ε₀A/d = κ₁ε₀L²/d = 5 × 8.854 × 10⁻¹² F/m × (7.40 × 10⁻² m)²/1.60 × 10⁻³ m = 2424.2252/1.60 × 10⁻¹¹ F = 1515.14 × 10⁻¹¹ F = 15.2 × 10⁻⁹ F = 15.2 nF

C₂ = κ₂ε₀A/d where κ₂ = dielectric constant of polystyrene = 3, A = area of plates = L² where L = length of square plate = 7.40 cm = 7.40 × 10⁻² m and d = thickness of polystyrene slab = 1.60 mm = 1.60 × 10⁻³ m and ε₀ = permittivity of free space = 8.854 × 10⁻¹² F/m

C₁ = κ₁ε₀A/d = κ₁ε₀L²/d = 3 × 8.854 × 10⁻¹² F/m × (7.40 × 10⁻² m)²/1.60 × 10⁻³ m = 1454.5351/1.60 × 10⁻¹¹ F = 909.08 × 10⁻¹¹ F = 9.09 × 10⁻⁹ F = 9.09 nF

Since the capacitors are in series, we find their effective capacitance C from

1/C = 1/C₁ + 1/C₂

C = C₁C₂/(C₁ + C₂)

= 15.2 × 10⁻⁹ F × 9.09 × 10⁻⁹ F/(15.2 × 10⁻⁹ F + 9.09 × 10⁻⁹ F)

= 138.168 × 10⁻¹⁸/24.29 × 10⁻⁹ F

= 5.69 × 10⁻⁹ F

The amount of electrical energy stored in a capacitor is given by W = 1/2CV² where C = capacitance and v = voltage applied. Now C = 5.69 × 10⁻⁹ F and V = 84.0 V for this capacitor

So W = 1/2 × 5.69 × 10⁻⁹ F × 84.0 V

= 238.98 × 10⁻⁹ J

≅ 239 × 10⁻⁹ J

= 239 nJ

So the energy that can be stored in the capacitor is 239 nJ

Answer:

Um okay? thank you for the points have a good say and be careful out there!

Explanation:

Answer:

hello

Explanation:

Answer:

f(x) = mx + b

Explanation:

The time taken by a truck to fully stop will be 2 hours. The time taken is found with the help of Newtons second equation of motion.

Distance is a numerical representation of the distance between two objects or locations.

Distance can refer to a physical length or an estimate based on other factors in physics or common use. |AB| is a symbol for the distance between two points A and B.

The given data Is;

u is the velocity of truck =  55 mph

v is the final velocity of truck = 0 mph

S is the distance travelled by the truck before stop= 302 feet

1 feet = 0.000189394 mile

302 feet = 302 × 0.000189394 mile= 0.057197 mile

From the Newtons's second equation of motion;

\(\rm v^2 = u^2-2as\)

The formula for the acceleration is found as;.

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

By rearranging the equation, we get;

\(\rm u^2 =2as \\\\ u^2 =2[ \frac{v-u}{t}]s \\\\ u = \sqrt{2[ \frac{v-u}{t}]s} \\\\ 55 = \sqrt{2[ \frac{55-0}{t}]} \\\\ 55= \frac{2 \times 55}{t} \\\\ t= 2 \ hour\)

Hence, the time taken by a truck to fully stop will be 2 hours.

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According to the given statement is  currents of equal magnitude  the current I is 30mA.

Current is the movement of electrical charge carriers, which are frequently electrons or atoms lacking in electrons. Current is frequently represented with the capital letter I. The common unit is the ampere, which is represented by the letter A.

According to Ohm's equation, V = IR, the current flowing through a conductor is proportional to the voltage V and resistance R. I = V/R is an alternate formulation of Ohm's law.

Distance, r = 6.6 cm

Force per unit length,  = 3.1 nN/m

Current passes, when wire is parallel:

→ I₁ = i₂

We know the relation,

\(\frac{F}{l}=\frac{\mu_0}{2 \pi} \times \frac{I_1 \times I_2}{r}\)

By substituting the values, we get

3.1 × 10⁻⁹ = \(\frac{3 \pi \times 10^{-7}}{2 \pi} \times \frac{I^2}{6.6 \times 10^{-2}}\)

The current will be:

I = 0.030884 A

= 30mA

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The component of the crate's weight that is parallel to the ramp is the only force that acts in the direction of the crate's displacement. This component has a magnitude of

F = mg sin(20.0°) = (15.0 kg) (9.81 m/s^2) sin(20.0°) ≈ 50.3 N

Then the work done by this force on the crate as it slides down the ramp is

W = F d = (50.3 N) (2.0 m) ≈ 101 J

The work-energy theorem says that the total work done on the crate is equal to the change in its kinetic energy. Since it starts at rest, its initial kinetic energy is 0, so

W = K = 1/2 mv ^2

Solve for v :

v = √(2W/m) = √(2 (101 J) / (2.0 m)) ≈ 10.0 m/s

The values into the equation yields:|b| = a√(1² + 1² + 0²) = a√2

a. Crystallographic directions of Burgers vectors for edge dislocation in FCC and BCCFor an edge dislocation in FCC, the Burgers vector can be resolved into the (111) plane and the <110> direction.

This occurs due to the interstitial position of the extra half-plane of atoms that is produced by the dislocation.

As such, the Burgers vector in FCC is given by the equation:  

a/2[1¯11]

For an edge dislocation in BCC, the Burgers vector can be resolved into the (110) plane and the <111> direction.

This occurs due to the interstitial position of the extra half-plane of atoms that is produced by the dislocation.

As such, the Burgers vector in BCC is given by the equation:

a/2[111]

b. Calculation of magnitude of the Burgers vector

The magnitude of the Burgers vector can be calculated using the equation:  

|b| = a√(h² + k² + l²)

where a is the lattice parameter and h, k, and l are the Miller indices of the crystallographic plane that the dislocation lies in.

For the edge dislocation in FCC, the Burgers vector is a/2[1¯11] and lies in the (111) plane.

As such, the Miller indices are h=1, k=1, and l=1.

Substituting these values into the equation yields:

|b| = a√(1² + 1² + 1²)

= a√3/2

For the edge dislocation in BCC, the Burgers vector is a/2[111] and lies in the (110) plane.

As such, the Miller indices are h=1, k=1, and l=0.

Substituting these values into the equation yields:|b| = a√(1² + 1² + 0²) = a√2

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The man's resultant velocity is

8.5 m/s up .

Answer:

Full moon

Explanation:

B. It represented African Americans and their struggle for equality.Answer:

Explanation: