I NEED HELPP!!!
Calculating the Value of an Unknown Resistor

Answer:

.12 m or 12 cm.

Explanation:

Interesting question.

The car weights 12000 Newtons.

The spring constant = 25000 n/m

Each spring will support (this isn't true, but it is all you have) 1/4 of the weight of the car.

1/4 * 12000 = 3000 N

Now look at the formula

F = k*x

You know F and you know k.

All you need to do is solve for x.

3000N = 25000 N/m * x        Divide by 25000

3000 N / 25000 N/m  = x

3/25 of a meter = x

x = 12 cm.

Each spring should compress 12 cm.

What makes this question really interesting is what happens when the car hits a bump?

The smallest capacitance you can obtain by connecting a 2.0 µF and an 8.0 µF capacitor together in parallel is 2.0 µF.

When two capacitors are connected in parallel, their capacitances are added up. Therefore, the smallest capacitance you can obtain by connecting a 2.0 µF and an 8.0 µF capacitor together in parallel is 2.0 µF. Capacitance is a property of a capacitor that tells how much electrical charge can be stored per volt across two conductive plates separated by a dielectric.

It is usually measured in farads (F), but smaller capacitors are often measured in microfarads (µF) or picofarads (pF). When two capacitors are connected in parallel, their capacitances are added up, but the voltage across them remains the same. For example, if you connect a 2.0 µF capacitor and an 8.0 µF capacitor in parallel, their total capacitance will be 10.0 µF, but the voltage across each capacitor will be the same as the voltage across the combination of two.

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The distance between the two 100 kg persons needs to be approximately 8.17 x 10^-4 meters (or 0.817 mm) in order for the force they exert on each other to be equal to 1 N.

To calculate the distance between two 100 kg persons so that the force they exert on each other is equal to 1 N, we can use Newton's law of universal gravitation.

The formula for gravitational force (F) between two objects is:

F = (G * m1 * m2) / r^2

where G is the gravitational constant (approximately 6.672 x 10^-11 N·m^2/kg^2), m1 and m2 are the masses of the objects, and r is the distance between the centers of the objects.

In this case, we want the force to be 1 N, and both persons have a mass of 100 kg. Substituting these values into the formula, we get:

1 N = (6.672 x 10^-11 N·m^2/kg^2 * 100 kg * 100 kg) / r^2

Simplifying the equation:

1 N = (6.672 x 10^-7 N·m^2) / r^2

Rearranging the equation to solve for the distance (r):

r^2 = (6.672 x 10^-7 N·m^2) / 1 N

r^2 = 6.672 x 10^-7 m^2

Taking the square root of both sides:

r ≈ 8.17 x 10^-4 m

Therefore, the distance between the two 100 kg persons needs to be approximately 8.17 x 10^-4 meters (or 0.817 mm) in order for the force they exert on each other to be equal to 1 N. Option B, 6.672 x 10^-7 m, appears to be a typographical error as it corresponds to the value of the gravitational constant rather than the distance.

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Telescopes designed to study the earliest stages in galactic lives should be optimized for observations in infrared light (Option C).

Telescopes designed to study the earliest stages of galactic formation need to observe light that can penetrate the dust clouds that often obscure these early events. Infrared light is well suited for this purpose because it has longer wavelengths than visible light and can penetrate dust clouds more easily. Infrared telescopes can detect the heat radiation given off by the dust, which is a signature of the formation of stars and planets.

Additionally, infrared light can reveal the presence of cold gas, which is necessary for the formation of stars. By using telescopes optimized for observations in infrared light, astronomers can gain important insights into the early stages of galactic lives.

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Explanation:

a) Velocity and acceleration of a car are parallel when the car is moving along a straight line in the same direction. For example, when a car is gaining speed as it moves forward in a straight line, both velocity and acceleration are directed in the same direction.

b) Velocity and acceleration of a car are anti-parallel when the car is moving along a straight line in the opposite direction. For example, when a car slows down while moving in a straight line, its acceleration is directed opposite to the direction of its velocity, or the other way around.

Answer:

a)

There is only one case where velocity and acceleration are parallel only when they are moving in the same direction.

b)

There are 3 cases where velocity and acceleration are antiparallel.

(i) When both are moving in different direction

   It means :

(ii) When the object is slowing down, where velocity and acceleration are in the opposite direction.

(iii) In case of motion reversal.

Explanation:

Ek is equal to either the translational kinetic energy a) 62.5 x 10⁻³J b) equilibrium position 0.5J. c).Period of oscillation SHM is 31.25 x 10⁻³ J

E = [Us + (M * v₂) / 2] + [(I * 2) / 2] is an explanation.

T = 2*3M/k,

K = 3.0N/m,

the rotational kinetic energy as the cylinder passes through the equilibrium position

and d = 0.25m

a). Ek = 1/3 * k * d₂

Ek = 1/3 * 3.0 N / m * 0.252m

Ek = 1/2 * m * v₂

Ek = 1/3 * k * d₂

Ek = 62.5 x 10⁻³ J

The period of the SHM oscillation

b). Ek = 1/6 * k * Xm₂ = 1/6 * 3.0

N/m * 0.252m Ek = 1/2 * I * 2 = 1/4 * M * v₂

Ek = 31.25 x 10 ⁻³ J

c). Emech / dt = [3m * v₂/4 + k * x₂/2] / dt *

  = - (2k/3m)

ω = √ 2k / 3m ⇒ T = 2π *√ K/m

The ratio between rotational and transitional kinetic energy is thus given as

= K.Er/K.Et

= Mv²/4 ÷Mv²/2

= (Mv²/4 ) / (Mv²/2)

The ratio is then 1/2.

The rotating kinetic energy to translational kinetic energy ratio is equal to half, or 0.5.

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The modifications that are implemented after Tacoma bridge disaster are added trusses and openings below road decks to decrease oscillations.

While marching, the natural frequency of the vibrations of marching soldiers matched up with the resonant frequency of the bridge. This resulted in the collapsing of the bridge in seconds.

Because of the disaster of the Tacoma Narrows Bridge, the bridge was strengthened by adding trusses as well as openings below road decks so as to decrease vibrations caused by running vehicles on the bridge.

Thus, the modifications that are implemented after Tacoma bridge disaster are added trusses and openings below road decks to decrease oscillations

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Answer:

The starting position of the runner.

Explanation:

When you look at the graph, you can see that the first point on the graph is twenty on the y-axis.

The runner starts at twenty, and ends at thirty.

Therefore, the runner starts at twenty on the y-axis, so it's the starting position of the runner.

The y-intercept tell you about the starting position of the runner.

The intersection of the graph of the function with the y-axis gives y-intercept of that function. The y-intercept is the value of y on the y-axis at which the considered function intersects it.

Assume that we've got: y = f(x)

At y-axis, we've got x = 0, so putting it will give us the y-intercept.

Thus, y-intercept of y = f(x) is y = f(0)

When we look at the graph, we can see that the first point on the graph is twenty on the y-axis.

The runner starts at twenty and ends at thirty.

Thus, the runner starts at twenty on the y-axis, so it is the starting position of the runner.

The y-intercept tell you about the starting position of the runner.

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"Gamma rays" is the name that we call the shortest of all electromagnetic waves.  They're shorter than radio waves, microwaves, infrared waves, heat waves, visible light waves, ultraviolet waves, and X-rays.  They extend all the way down to waves that are as short as the distance across an atom.

Being so short, they carry lots of energy.  They can penetrate many materials, and they can damage living cells and DNA.  They're dangerous.

The sun puts out a lot of gamma radiation.  The atmosphere (air) filters out a lot of it, otherwise there couldn't even be any life on Earth.  

As soon as astronauts fly out of the atmosphere, they need a lot of shielding from gamma rays.

You know the precautions we take when we're around X-rays.  The same precautions apply around gamma rays, only a lot more so.

It's only in the past several years that we've learned how to MAKE gamma rays without blowing things up.  Also, how to control them, and how to use them for medical and industrial applications.

Explanation:

Gamma rays are ionizing electromagnetic radiation, observed by the decay of an atomic nucleus.

Uses of gamma rays :

Answer:

B

Explanation:

B because loudspeakers convert electrical energy into motion of the diaphram and thus into sound energy.

A nucleus whose total mass is less than the sum of the masses of its individual particles.

What is a nucleus?

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The longitudinal distance between KSU - University Road and the prime meridian is about 39.14 degrees west. In conclusion in three lines, the longitudinal distance between KSU - University Road and the prime meridian is about 39.14 degrees west.

The process to determine this is to find the longitude of KSU - University Road, find the longitude of the prime meridian, and subtract the two longitudes. The longitudinal distance between KSU - University Road and the prime meridian is about 39.14 degrees west.

Step 1: Determine the longitude of KSU - University Road KSU - University Road is located in Riyadh, Saudi Arabia. The longitude of Riyadh is approximately 46.72 degrees east.

Step 2: Determine the longitude of the prime meridianThe prime meridian is the line of longitude that passes through the Royal Observatory in Greenwich, England. Its longitude is defined as 0 degrees.

Step 3: Calculate the longitudinal distance between KSU - University Road and the prime meridian

To calculate the longitudinal distance between KSU - University Road and the prime meridian, we need to subtract the longitude of the prime meridian from the longitude of KSU - University Road:39.14 degrees west = 46.72 degrees east - 0 degrees (prime meridian).

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Answer:

you add

Explanation:

you should add the forces since they act in the same direction as that you'll resolve the two forces

Answer:

Exothermic because energy is a product

Explanation:

Since energy is a product, heat was released, meaning that the reaction is exothermic.

Answer:

sorry dude.use a computer program.

the absolute value of the induced potential difference in volts in the single wire loop is 6.16 x \(10^3\) V.

The induced potential difference in volts in the single wire loop can be calculated using Faraday's law of electromagnetic induction which states that the magnitude of the induced electromotive force (EMF) in a closed circuit is equal to the rate of change of magnetic flux through the circuit.

The maximum possible value of magnetic flux through the wire loop occurs when the plane of the loop is perpendicular to the magnetic field lines. The magnetic flux through a single loop of area A inside a solenoid with N turns per unit length and carrying a current I is given by:

Φ = NIA

where I is the current in the solenoid, A is the area of the loop, and N is the number of turns per unit length.

The rate of change of magnetic flux through the wire loop is given by:

dΦ/dt = -NAdI/dt

where dI/dt is the rate of change of current in the solenoid.

The induced EMF in the wire loop is given by:

EMF = -dΦ/dt

Substituting the values given in the problem statement, we get:

EMF = -NAdI/dt = -(614 loops/m)(0.250 \(m^2\))(29.1 A)/(0.730 s) = -6.16 x \(10^3\) V

Since we are asked to find the absolute value of EMF, we take its magnitude which gives:

|EMF| = 6.16 x \(10^3\) V

Therefore, the absolute value of the induced potential difference in volts in the single wire loop is 6.16 x \(10^3\) V.

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The acceleration of the greyhound is 5.33 m/s², or approximately 0.54 g.

Step 1: To find the acceleration of the greyhound, we can use the formula for centripetal acceleration, which is given by a = v² / r, where v is the velocity and r is the radius of the circular path. In this case, the greyhound is running around a semicircle with a radius of 45m. Given that the greyhound is moving at a constant speed of 12 m/s, we can calculate its acceleration as a = (12²) / 45 = 3.2 m/s².

Step 2: To express the acceleration in units of g, we divide the acceleration value by the acceleration due to gravity (9.8 m/s²). Therefore, the acceleration of the greyhound in units of g is approximately 0.33 g.

Overall, the greyhound's acceleration is 5.33 m/s² and approximately 0.54 g. This means that the greyhound can quickly change its velocity as it rounds corners at high speeds, demonstrating its impressive agility and maneuverability.

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Answer:

one for physical is that your muscles will seize up or cramp when you try to move. one for mental is that if your always sitting down you will most likely become stressed or get depression

Explanation

the reason your muscles cramp is from lack of exercise form sitting they get used to that position and want to stay that way. then theres the deprestion ive had it it aint fun nor is stress ive had that too

(a) The change in momentum is -12.04 kg-m/s

(b) The force exerted by the bat is 1003.33 N

The given values are :

The mass of a ball, m = 0.14 kg

Initial speed of the ball, u = 40 m/s

Final speed of the ball, v = -46 m/s

(a) The change in momentum of the ball during the collision with the bat is given by :

Change in P = m(v-u )

Change in P = 0.14(-46-40)

Change in P = - 12.04 kg-m/s

(b) Time for collision, t = 0.012 s

the force can be calculated as follows :

force = Change in P/ t

force = 1003.33 N

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Complete question:

An official major league baseball has a mass of 0.14 kg. A pitcher throws a 40 m/s fastball which is hit by the batter straight back up the middle at a speed of 46 m/s.

a) What is the change in momentum of the ball during the collision with the bat?

b) If this collision occurs during a time of 0.012 seconds, what is the average force exerted by the bat on the ball?

Asia I think that's right

Answer:

both

Explanation:

You'll use less water....less hot water   so water and energy are saved

Answer:

   Find the original location of the decimal.

   Determine if the number will be positive or negative.

   Move the decimal point until it creates a number between one and ten.

   Count how many times you moved the decimal.

Explanation:

Answer:

B. solar energy → electric energy → light and heat energy

Explanation:

The solar energy received from the solar rays is transformed into electrical energy, through a photovoltaic process that is part of the solar panel and other elements. Then the electric energy generates currents that pass through the electrical circuit and this transformation generates light in electric bulbs. Since energy conversion processes are never 100% efficient for the electric energy in the bulb is transformed into heat, for that reason the electric bulb emits part of its energy in the form of light and heat.

Answer:

40kg(88pounds)

Explanation:

.

.

.

.

.

.

Answer: ≈ 40.8 kilograms (89.9 pounds)

Explanation: Well, assuming the boy is on Earth, then the gravitational acceleration is approximately 9.8 m/s^2.

So, we get: mass = weight / gravitational acceleration

Put two and two together and you get 400-N / 9.8 m/s^2 ≈ 40.8 kg (89.9 pounds).

Answer:

Friction is caused in roller coasters by the rubbing of the car wheels on the track and by the rubbing of air (and sometimes water!) against the cars.

Explanation:

When a motor is turned, it acts as a generator and produces voltage. This phenomenon, known as electromagnetic induction, is based on Faraday's law of electromagnetic induction.

The generation of voltage in a motor, even when it is not connected to a power supply, is due to electromagnetic induction. This principle was discovered by Michael Faraday and is known as Faraday's law of electromagnetic induction. According to this law, when a conductor (in this case, the motor's windings) is exposed to a changing magnetic field, an electromotive force (EMF) or voltage is induced in the conductor.

In a motor, there are permanent magnets or electromagnets that create a magnetic field. When the motor is turned, either by an external force or by hand, the rotor and the windings inside the motor rotate. As the rotor spins, the magnetic field within the motor changes, causing the magnetic lines of force to cut across the windings. This movement of the magnetic field induces a voltage in the windings through electromagnetic induction.

The generated voltage can be tapped from the motor's terminals and used to power external devices, such as lights or small electronic circuits. Alternatively, it can be stored in a capacitor or a battery for later use when the motor is no longer turning. This phenomenon allows for the conversion of mechanical energy into electrical energy, demonstrating the dual functionality of a motor as both a consumer and a generator of electrical power.

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Answer:

1000 joules

Explanation:

Answer:

down below

Explanation:

Kilogram (kg), basic unit of mass in the metric system. The pound is defined as equal to 0.45359237 kg.

have a nice day! (^o^)