a basketball player of height 2.30 m is standing 3.20 m in front of a convex shperical mirror of redius

If an electron moving in the positive x direction experiences a magnetic force in the positive z direction and the magnetic field in the x direction (B_x) is zero, it implies that the magnetic field (B) is directed solely in the y direction.

Based on the information given, we know that the electron is moving in the positive x direction and experiencing a magnetic force in the positive z direction. This means that the magnetic field must be perpendicular to both the electron's velocity (positive x direction) and the direction of the magnetic force (positive z direction).

Using the right-hand rule for magnetic force, if you point your thumb in the direction of the electron's velocity (positive x direction) and your fingers in the direction of the magnetic force (positive z direction), your palm will be facing the direction of the magnetic field.

Since the magnetic field is perpendicular to both the x and z axes, we can conclude that it is in the positive y direction. Therefore, the correct answer is b. positive y direction.

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Answer:

306 m/s

Explanation:

Law of conservation of momentum

m1v1 + m2v2 = (m1+m2)vf

m1 is the bullet's mass so it is 0.1 kg

v1 is what we're trying to solve

m2 is the target's mass so it is 5.0 kg

v2 is the targets velocity, and since it was stationary, its velocity is zero

vf is the velocity after the target is struck by the bullet, so it is 6.0 m/s

plugging in, we get

(0.1 kg)(v1) + (5.0 kg)(0 m/s) = (0.1 kg + 5.0 kg)(6.0 m/s)

(0.1)(v1) + 0 = 30.6

(0.1)(v1) = 30.6

v1 = 306 m/s

The initial velocity of the bullet can be determined from the total momentum of the system. The velocity of the bullet was 306 m/s.

Momentum of a body is the product of its mass and velocity. For a collision, the momentum before and after collision will be the same for the colliding system.

Let m1 and m2 be the masses and u be the initial velocity and v is the final velocity.

then,  m1 u1  + m2 u2 = m1 v1  + m2 v2.

Given m1 = 5 kg

m2 =  0.1 kg

The velocity of the combined mass v = 6 m/s.

The momentum of the target is zero since it was stationary.

(0.1 × u1) = (0.1 + 5)6 m/s

(0.1 × u1) = 30.6 m/s

then u1 = 30.6/0.1 = 306 m/s

Therefore, the velocity of the bullet before hitting was 306 m/s.

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Answer:

because he is trying to break past you and sack your quarterback

Explanation:

The expression for the energy stored (E) in a stretched wire of original length (L), cross-sectional area (A), tension (T), and Young's modulus (Y) is given by E = Y * e * ln(L) * A

The work done to stretch the wire can be calculated by integrating the force applied over the displacement. In this case, the force applied is the tension (T) in the wire, and the displacement is the change in length (ΔL) from the original length (L) to the stretched length (L + ΔL).

The tension in the wire is given by Hooke's law, which states that the tension is proportional to the extension of the wire:

T = Y * (ΔL / L)

where Y is the Young's modulus of the material of the wire.

Now, let's calculate the work done to stretch the wire:

dW = T * dL

Integrating this expression from L to L + ΔL:

W = ∫ T * dL = ∫ Y * (ΔL / L) * dL

W = Y * ΔL * ∫ (dL / L)

W = Y * ΔL * ln(L) + C

Here, C is the constant of integration. Since the energy stored in the wire is zero when it is unstretched (ΔL = 0), we can set C = 0.

Finally, the expression for the energy stored in the wire (E) is:

E = W = Y * ΔL * ln(L)

or, if we substitute the cross-sectional area (A) and strain (e) of the wire, where e = ΔL / L:

E = Y * e * ln(L) * A

Thus, the expression for the energy stored (E) in a stretched wire of original length (L), cross-sectional area (A), tension (T), and Young's modulus (Y) is given by:

E = Y * e * ln(L) * A

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The average speed of April, given the data from the question is 13.33 m/s

Speed is the distance travelled per unit. Mathematically, it can be expressed as:

Speed = distance / time

Average speed is simply defined as the total distance travelled divided by the total time taken to cover the distance .

Average speed = Total distance travelled / total time

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

Average speed = Total distance travelled / total time

Average speed = 1600 / 120

Average speed = 13.33 m/s

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Complete question

As shown in the figure below, April enters a race. She runs leftward 100 m to her horse, then she rides 500m to her truck, then she drives 1000m in a total time of 120s.What is her average velocity over the 120s period? What is her average speed over the 120s period?

Answer:

-13 | Velocity

13 | Speed

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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The magnitude of the impulse that the plate gives to the bullet is  6.7 N, Option a.

The formula for impulse is given as m*deltav

convert 20 grams to kg

= 20 x 1000

= 0.020kg

We would have to find the paralle; impulse and also solve for the perpendicular impulse.

The parallel impulse is given as:

0.020kg * (320 - 350)m/s * cos30

= 0.020 * -30 * 0.8660

= -0.5196

Next we have to solve for the perpendicular impulse

0.020kg * (320 + 350)m/s * cos30

0.020 * 670 * 0.8660

= 6.7

the mag impulse is given as;

\(\sqrt{6.7^2 + 0.52^2}\)

= 6.7 N/S

Option A is correct

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The value of the current flowing through the shunt is 0.08 A.

The value of the current flowing through the shunt is calculated by applying the following formula.

I = V/R

where;

The voltage flowing through the shunt is calculated as;

V/V'  = L/L'

where;

V/3 = 80/100

V = (3 x 80 ) / 100

V = 2.4 V

The current flowing through the shunt is calculated as;

I = 2.4 / 30

I = 0.08 A

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Answer:

12 volts

Explanation:

4 + 4 + 4 = 12 volts all volts on parallel circuit are the same

If the percent difference is larger than 5%, it indicates that there may be some experimental error or that the theoretical model is not accurate enough to predict the behavior of two lenses in contact.

To compare the agreement between experimental and theoretical values of fab, we can calculate the percent difference between the two values. If the percent difference is small, it suggests that equation (4) is a valid model for the equivalent focal length of two lenses in contact.

First, we need to calculate the theoretical value of the fab using equation (4). Then, we can measure the focal lengths of lenses a and b experimentally and combine them to get the experimental value of fab. We can then calculate the percent difference between the two values using the formula:

% difference = |(theoretical - experimental) / theoretical| x 100%

If the percent difference is less than 5%, it suggests that equation (4) is a valid model for the equivalent focal length of two lenses in contact.

Overall, comparing the agreement between experimental and theoretical values of the fab is important in determining the validity of equation (4) as a model for the equivalent focal length of two lenses in contact.

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Answer:

Ans=13.75

Explanation:

a=v-u

t

a= 55-0

4

a=13.75m/s^2

We are given the initial velocity (v0) is 0 ft/s, the final velocity (v) is 55 ft/s, and the time (t) is 4 seconds.

We want to find the acceleration (a). The equation relating these variables is:

v = v0 + at

Plugging in the known values:

55 = 0 + a(4)

55 = 4a

Divide both sides by 4:

55/4 = a

Therefore, the magnitude of the car's acceleration is:

a = 13.75 ft/s2

So in summary, the car's acceleration is:

a = 13.75 ft/s2

The key here is using the acceleration equation:

v = v0 + at

The  time to drop from 1.3m and velocity after height at 0.7 mis mathematically given as

t1 = 0.515 sec  

v0 = 3.7m/s

Question Parameters:

A 0.045-kg golf ball is dropped from rest.

Is dropped from a height of 1.3m and comes back up at a height of .7m

Generally, the equation for the time to drop from 1.3m   is mathematically given as

yf - yi = vi t + a t^2/ 2

Therefore

0 - 1.3 = 0 - 9.8 t^2 /2

t1 = 0.515 sec  

Hence, after its max height is 0.7 m,

vf^2 - vi^2 = 2 a (yf - yi)

0^2 - (v0)^2 = 2(-9.8)(0.7 - 0)

v0 = 3.7m/s

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Answer:

Although expansion seems to imply a Big Bang, no other specific predictions of the Big Bang theory were tested and confirmed until the 1960s.  

Explanation:

Answer:

Today, the consensus among scientists, astronomers and cosmologists is that the Universe as we know it was created in a massive explosion that not only created the majority of matter, but the physical laws that govern our ever-expanding cosmos.  This is known as The Big Bang Theory. For almost a century, the term has been bandied about by scholars and non-scholars alike. This should come as no surprise, seeing as how it is the most accepted theory of our origins.

;)

Answer:

An LDR's resistance is high in the dark and at low light levels, allowing only a little amount of current to pass through it. An LDR's resistance is low in bright light, allowing more current to flow through it.

UL Standard 1563 is a safety standard established by Underwriters Laboratories, Inc. for immersion heaters. It sets the maximum water temperature at 104 degrees Fahrenheit to prevent scalding injuries.

Additionally, the standard suggests a maximum time of immersion for safety reasons. The suggested maximum time of immersion varies depending on the specific application and heater type, but generally, it is around 10-15 minutes. However, it is important to note that exceeding the suggested time of immersion can be dangerous and lead to burns or other injuries. Therefore, it is critical to follow the manufacturer's instructions and adhere to the suggested maximum time of immersion to prevent any harm to users. Overall, UL Standard 1563 aims to ensure the safety of users when using immersion heaters by establishing maximum water temperature and immersion time guidelines.

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The winds aloft chart for the Great Lakes (Michigan is fine) region displays the wind direction and speed at several altitudes. At 3000 feet, the wind speed is approximately 17 knots.

At 12,000 feet, the wind speed is about 44 knots. The wind speed at FL350 is approximately 67 knots.Surface friction has an effect on the winds close to the ground, slowing them down due to the frictional force exerted on the ground by air molecules. The winds shift direction with altitude, veering to the right of the direction of travel in the northern hemisphere. The approximate location of the Jetstream can be obtained by examining the wind/temperature plot chart. The fastest wind speed at FL360 appears to be approximately 145 knots, traveling towards the northeast. Flight to the east or southeast would benefit from this wind speed.Seasonally, winds aloft change depending on the position of the jet stream, which moves towards the poles during the summer months and towards the equator during the winter months.

The current surface analysis chart (Prog chart) shows the major frontal activity passing through the Midwest states. Precipitation is what leads the frontal passage in general, with both temperature and wind speed/direction changing from behind to ahead of the front.

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Simply put, no. Try not to be hard on you if this is the first time you've heard it; in some cases, a belief was once accurate. A bulk of energy storage units kept in fridge are basic AA, AAA, C, & D batteries.

There are three main battery kinds that may be used by consumers. They are lithium ion, nickel metal hydride, and alkaline. Each kind has benefits and drawbacks. Each of them has a unique position in the history of technology.

With the greatest energy density of just about any battery cell, lithium batteries are made of this very light metal. As a result, they have a higher energy capacity than battery systems or any other separate bat of a similar size. Additionally, they work admirably in the both cold and warm environments.

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Based on the given information, the most appropriate classification for the state of the volcano would be "Active-Dormant."

The volcano's history of generating multiple lava flows over the past 10,000 years indicates that it has been active in the relatively recent past. The presence of lava flows that have spread over large areas suggests ongoing volcanic activity, although not necessarily in the immediate present.

Additionally, the mention of very little tephra (volcanic ash and fragments) indicates that the volcano is not currently experiencing explosive eruptions. Instead, it has been primarily characterized by effusive eruptions that produce lava flows.

The fact that people in the nearby town remember the last eruption, which caused some forest fires, further supports the classification of the volcano as active-dormant. While the volcano may not be actively erupting at the moment, the memory of the recent eruption and the potential for future volcanic activity suggests that it is still in a state of activity, albeit in a relatively dormant phase.

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The average speed of the person walking with up to a distance of 2.3 miles within 30 minutes is 4.6 miles/hr. This is equivalent to 2.05 m/s.

Average speed of an object is the measure of the distance covered per unit time. It is the ratio of distance to the time of travel. The rate of speed is called velocity.

Greater the distance covered within smaller time, then greater is  the speed of the object.

Given that,

distance = 2.3 miles.

time = 30 minutes = 0.5 hours

then speed = distance/time

v = 2.3 miles /0.5 hours = 4.6 mph.

1 miles/hour = 0.447 m/s

then 4.6 mph = 4.6 mph × 0.447 m/s/ 1 mph = 2.05 m/s.

Therefore, the average speed of Mr. Tim is 2.05 m/s.

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If the collision between the balls is perfectly inelastic, the vertical height h reached by the ball on the string will be equal to the initial height from which the ball was dropped, as the explanation below will show. main answerWhen two balls, ball 1 and ball 2, collide, momentum is conserved, but kinetic energy is not conserved.

This type of collision is called a perfectly inelastic collision. During a perfectly inelastic collision, the colliding objects stick together and move as one object after the collision. Here, we have a ball that is dropped onto another ball, and the two balls stick together after the collision. Therefore, this is a case of a perfectly inelastic collision. Initially, the first ball is at a height h above the second ball, and it is dropped. It falls and collides with the second ball, which is at rest. After the collision, the two balls stick together, and they move as one object.

The total energy of the system before the collision is given by the potential energy of the first ball:  Ei = mgh. After the collision, the total energy of the system is given by the kinetic energy of the two balls:Ef = 1/2 (m1 + m2) v2, where v is the velocity of the two balls after the collision.Since momentum is conserved, we can write:  m1 * vi = (m1 + m2) * vAfter the collision, the two balls move up and reach a maximum height, h', above the initial height. This height is given by:  h' = Ef / (m1 + m2) * g= (1/2 (m1 + m2) v2) / (m1 + m2) * g= v2 / 2gSince energy is not conserved in a perfectly inelastic collision, the total energy after the collision is less than the total energy before the collision. Therefore, the maximum height reached by the two balls after the collision is less than the initial height of the first ball. Thus, if the collision between the balls is perfectly inelastic, the vertical height h reached by the ball on the string will be equal to the initial height from which the ball was dropped.

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The hydrostatic force against one side of the plate is approximately 111,148 N.

The hydrostatic force exerted on a submerged surface can be calculated by integrating the pressure over the surface area. In this case, we consider a semicircular plate submerged vertically in water.

The pressure at a depth h in a fluid can be given by the equation P = ρgh, where P is the pressure, ρ is the density of the fluid, g is the acceleration due to gravity, and h is the depth.

The distance from the surface of the water to the top of the plate is 3 m, so the depth varies from 0 to 6 m as we move along the plate. The width of the plate is infinitesimally small, and the height varies as we move along the plate, following the shape of a semicircle with a radius of 9 m.

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To calculate the hydrostatic force against one side of the plate, we integrate the pressure over the surface area. Using the differential area element dA = (9 m) dθ, where θ is the angle, the force can be expressed as:

F = ∫[0,π] (P dA) = ∫[0,π] (ρgh)(9 m) dθ.

Substituting the values, with ρ = 1000 kg/m³ and g = 9.8 m/s², we can evaluate the integral to find the approximate hydrostatic force.

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Answer:

Neil Armstrong

Explanation:

Answer:

Neil Armstrong.

Explanation:

. PLEASE GIVE BRAINLIEST.

The car will skid to a stop after traveling approximately 80.5 meters.

To solve this problem, we can use the work-energy theorem and the equation for friction. The work done by the frictional force is equal to the change in kinetic energy of the car:

The work done by the frictional force is equal to the force of friction times the distance traveled:

The force of friction is equal to the coefficient of friction times the normal force, which is equal to the weight of the car:

Substituting these equations and solving for d, we get:

where K_i is the initial kinetic energy of the car, which is equal to (1/2) * m * v², and K_f is the final kinetic energy of the car, which is equal to 0.

Plugging in the given values, we get:

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The length in centimeters of rope Pat have is 600 centimeters.

Pat has 6 meters of rope. To convert meters to centimeters, we simply need to multiply the number of meters by the conversion factor, which is 100 centimeters per meter. So, we can calculate the length of the rope in centimeters using this formula:

Length in centimeters = Length in meters × Conversion factor

In Pat's case:

Length in centimeters = 6 meters × 100 centimeters per meter

Length in centimeters = 600 centimeters

So, Pat has 600 centimeters of rope. This conversion is important because it helps us express the same length in different units, which can be useful for various purposes such as measurements and calculations in daily life or in specific tasks.

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Answer:

E = V/d = 120 V/0.06 m = 2000 V/m

Now we can calculate the potential energy of the point charge as it moves from point A to point B:

U = qEΔd = (1.0 × 10^-6 C)(2000 V/m)(0.06 m) = 1.2 × 10^-7 J

Therefore, the potential energy decreases by 1.2 × 10^-7 J as the point charge moves from point A to point B. So, option c) The potential energy decreases by 6.0 × 10^-6 J is necessarily true concerning the potential energy of the point charge

Explanation:

The potential energy of a charged particle in an electric field is the work done by the electric force in moving the charge from a point where the electric field is zero to a point where the electric field is E. The potential energy is given by the equation: U = qE where q is the charge of the particle and E is the electric field

Answer:

true

Explanation:

this is true, igneous rocks are formed from molten lava when it cools

Answer: True

Explanation: