. a string has a mass of 12.5 g. the string is stretched with a force of 9.63 n, giving it a length of 1.89 m. then, the string vibrates transversely at precisely the frequency that corresponds to its 4th normal mode. what is the frequency of the standing wave? (a.) 42.9 hz (b.) 25.9 hz (c.) 32.6 hz (d.) 40.4 hz (e.) none of the above

Answer:

Push-ups

explanation:

Answer:

the anser for your qestion is

c. push- ups

Yes it is important that the temperature of the surface important to apply a clear coat for G60 Galvanized tubing.

The end of a steel sheet (either hot- or cold-rolled) is sheared and welded to the preceding coil to form one continuous coil.A high-performance tension leveler is used to straighten the strip, resulting in excellent flatness.

The strip is dipped in an alkali bath and brushed for preliminary degreasing, and then undergoes alkaline electrolytic degreasing. This removes impurities on the material surface that could harm the zinc coating. The strip is then dipped in a acidic bath to activate the surface.

The zinc-coated strip is given various chemical treatments according to intended use, including phosphate treatment for excellent paintability, and chromate free special treatment for good corrosion resistance.

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The plane's speed is 450 miles per hour, and the wind speed is 50 miles per hour. This is determined by solving the equations derived from the distances and times of the flight with and against the wind.

Let's assume the speed of the plane (without considering the wind) is P, and the speed of the wind is W.

When flying into a headwind, the effective speed of the plane is reduced by the wind speed. So the equation for the outbound flight is:

P - W = 2000 miles / 5 hours

P - W = 400 miles per hour (mph)  ---(Equation 1)

When flying with a tailwind, the effective speed of the plane is increased by the wind speed. So the equation for the return flight is:

P + W = 2000 miles / 4 hours

P + W = 500 miles per hour (mph)  ---(Equation 2)

Now we have a system of two equations (Equation 1 and Equation 2) with two variables (P and W). We can solve this system to find the values of P and W.

Adding Equation 1 and Equation 2 together, we eliminate the variable W:

(P - W) + (P + W) = 400 mph + 500 mph

2P = 900 mph

P = 450 mph

Substituting the value of P back into Equation 1 or Equation 2, we can solve for W:

450 mph - W = 400 mph

W = 450 mph - 400 mph

W = 50 mph

Therefore, the plane's speed is 450 mph and the wind speed is 50 mph.

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The acceleration experienced by the crate is approximately 0.844 m/s

Weight of the crate:

Weight = mass × acceleration due to gravity

Weight = 114 kg × 10 m/s^2

Weight = 1140 N

Force of friction:

Force of Friction = coefficient of friction × normal force

Force of Friction = 0.541 × 1140 N

Force of Friction ≈ 616.74 N

Net force:

Net Force = Applied Force - Force of Friction

Net Force = 713 N - 616.74 N

Net Force ≈ 96.26 N

Acceleration:

Acceleration = Net Force / mass

Acceleration = 96.26 N / 114 kg

Acceleration ≈ 0.844 m/s

Therefore, the acceleration experienced by the crate is approximately 0.844 m/s

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Answer:

can you please resend it but more clealer so i can read it better

thank you

Explanation:

Answer:

a smooth surface also, more mass

Explanation:

Answer:

Explanation:

Here are some simple do’s and don’ts for kids who refuse to do work: Don’t just punish. If a child or young adult is struggling with some social or emotional challenges at the moment, a punishment is only going to push them away further. Your punishment will appear as harsh, mean, and uncaring.The patient's failure to keep appointments. Patients make appointments, then cancel them at the last minute, or don't show up at all. From the provider's perspective, that means a window of no income in addition to the fact that the patient isn't getting the help he or she needs. A patient's rude or obnoxious behavior.

Answer:

3rd order polynomial

Explanation:

Given that the increase in the order of the polynomial the error between the curve fit and measured data will decreases hence  :

The polynomial order that is best to use is the 3rd order polynomial, this is because using a 3rd order polynomial will produce a less variance and a low Bias

A boy on a skateboard pushes off the ground with his foot. he and the skateboard accelerate down the sidewalk due to the force on the ground in one direction.

The ground applies an equal and opposite force on the boy in the opposite direction. This force causes the boy and the skateboard to accelerate forward.

According to Newton's second law of motion, the acceleration of an object is directly proportional to the force applied to it and inversely proportional to its mass.

Therefore, the acceleration of the boy and the skateboard will depend on the force applied by the boy's foot and the combined mass of the boy and the skateboard.

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A.

The X velocity of the baseball: 10 m/s * cos(20 degrees) = 9.66 m/s to the right

The Y velocity of the baseball: 10 m/s * sin(20 degrees) = 3.11 m/s upwards

B.

The X velocity of the football: 0 m/s ( when thrown straight up)

The Y velocity of the football: 100 m/s upwards

C.

The X velocity of the tennis ball: 15 m/s to the right

The Y velocity of the tennis ball: 0 m/s ( when thrown off a cliff)

Velocity is described as the directional speed of an object in motion as an indication of its rate of change in position as observed from a particular frame of reference and as measured by a particular standard of time.

Velocity can be represented mathematically in the  equation

V = d/t,

where V is the velocity,

d is the distance, and

t is the time.

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An expression for the angle at which the block begins to move in terms of μs is θ < μs

So, the answer is D.

When the plane is inclined at an angle θ to the horizontal plane, the maximum static frictional force Fs,max is equal to μsN, where N is the normal force exerted by the plane on the object. N = mg cosθ, where m is the mass of the object and g is the acceleration due to gravity

. The maximum static frictional force is equal in magnitude but opposite in direction to the force F, which acts parallel to the plane and tries to push the block down the plane.

Therefore, at the point when the block is just about to move down the plane, the maximum static frictional force Fs,max is equal to F.

Thus, Fs,max = F = mg sinθ ∴ μsN = mg sinθ ⇒ μs mg cosθ = mg sinθ ⇒ μs = tanθ

Therefore, the expression for the angle at which the block begins to move in terms of μs is θ = tan-1(μs).

So, the correct option is d. θ < μs

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The angle θ at which the block begins to move can be written in terms of μs as follows: tan θ = μs,θ = tan−1(μs). Therefore, the answer is d) θ < μs. Static friction is a force that prevents an object from moving when it is in contact with a surface. Hence, the correct answer is option d).

The angle at which the block begins to move can be defined in terms of μs as follows: Option D, θ < μs.Static friction is a force that prevents an object from moving when it is in contact with a surface. Static friction comes into play when a force is applied to an object that is at rest and trying to move. When the force is removed, the static friction disappears. Static friction is greater than kinetic friction, which is the force that opposes motion between two objects in contact that are in motion with respect to each other.

The formula for static friction is Fs ≤ μsN, where Fs is the static friction, μs is the coefficient of static friction, and N is the normal force. For an object to be on the verge of moving, the applied force must equal the maximum force of static friction.

Therefore, the equation becomes: F = Fs = μsNcosθ.As the angle θ is slowly increased, the friction force decreases. When the force that is applied exceeds the maximum force of static friction, the object begins to move. Therefore, the angle θ at which the block begins to move can be written in terms of μs as follows: tan θ = μs,θ = tan−1(μs).Therefore, the answer is θ < μs.

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Calculating the expression, we find that the hyperbolic orbit injection velocity is approximately 6.1293 km/sec. Therefore, the correct answer is 1. DV = 6.1293 km/sec.

To calculate the hyperbolic orbit injection velocity (hyperbolic periapsis speed), we can use the vis-viva equation: V² = Vp² + 2μ/r

Where: V = velocity of the spacecraft in the hyperbolic orbit

Vp = velocity of the planet (Earth) around the Sun

μ = gravitational parameter (1 for canonical units)

r = distance between the spacecraft and the planet (altitude + radius of the planet). Since the spacecraft is departing from Earth, we need to consider the velocity of the planet around the Sun. The velocity of the Earth around the Sun is given by: Vp = sqrt(μ / R)

Where R is the distance between the Earth and the Sun (1 AU).

Substituting the values and solving for V, we have:

V = sqrt(Vp² + 2μ/r)

V = sqrt((sqrt(μ / R))² + 2/r)

V = sqrt(μ / R + 2/r)

Converting the altitude from km to AU, we have:

r = (310 + 6378) km / (1 AU)

Now we can substitute the values into the equation:

V = sqrt(1 / 1 + 2 / r)

Calculating this expression, we find that the hyperbolic orbit injection velocity is approximately 6.1293 km/sec. Therefore, the correct answer is 1. DV = 6.1293 km/sec.

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It is more likely that the storm you observed, which passed over you after an hour, was a mesoscale convective system (MCS) rather than an air mass thunderstorm.

Air mass thunderstorms typically form and dissipate within the boundaries of a single air mass. They are generally short-lived and do not typically travel large distances. Therefore, it is less likely for an air mass thunderstorm to travel from a location far to the west to your current location within just an hour.

On the other hand, mesoscale convective systems are larger-scale weather systems that can cover hundreds of miles and persist for several hours or even longer. They often have organized structures, such as squall lines or clusters of thunderstorms, and can move over significant distances. It is more plausible for a mesoscale convective system to travel from a distant location to your area within the span of an hour.

Considering the time and distance covered, the fact that the storm passed over you after an hour suggests that it was likely a mesoscale convective system.

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Answer + Explanation:

To calculate how many years the investment will be able to cover Rayelle's college costs, we need to know the annual cost of tuition, fees, room, and board at a public college. Let's assume that this cost is $20,000 per year.We also need to know the future value of the investment after 15 years. Using the compound interest formula, we can calculate that the future value of the investment will be:

FV = PV * (1 + r/12)^(n*12)

where PV is the present value of the investment, r is the annual interest rate, n is the number of years, and FV is the future value of the investment.Plugging in the numbers, we get:

FV = $15,000 * (1 + 0.045/12)^(15*12) = $29,286.95

So, after 15 years, the investment will be worth $29,286.95.To calculate how many years the investment will be able to cover Rayelle's college costs, we can divide the future value of the investment by the annual cost of college, and then divide by 12 to get the number of years in months. This gives us:

Years = FV / (Annual cost of college) / 12

Years = $29,286.95 / $20,000 / 12 = 12.24 years

So, the investment will be able to cover Rayelle's college costs for approximately 12 years and 3 months. Rounded to the nearest month, the answer is 147 months. Therefore, the investment will be able to cover Rayelle's college costs for about 147 months.

Hope this helps!

- Dante

Answer:

Ohm’s law states that the current flowing through a conductor is directly proportional to the potential difference ( Voltage ) between the terminals of the conductor, provided that, factors such as the temperature of the conductor is kept constant

V = IR, where R is the proportionality constant.

R = resistance (measured in ohms)

V = voltage (measured in volts)

I = current (measured in amps)

The density of the object mentioned in the question when mass and volume are given is 0.924 g\(/cm^{3}\)

According to the problem we have the following data given,

The mass of object m= 85g

The volume of object V= 92\(cm^{3}\)

To find the density of the object we use the formula \(density=\frac{mass}{volume}=\frac{m}{V}\)

∴density ρ \(=\frac{m}{V}=\frac{85}{92}=0.924g/cm^{3}\)

Thus the density of the object = 0.924 g/\(cm^{3}\)

Your question was not complete but most probably the question was if an object of mass 85g and volume 92cm^3 is given, what is its density?

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The momentum of the object afterwards will be 80 Kgms-1.

Given the following data as per the question:

Mass of the object is given as 6 Kg

Force is given as 10 N in the question

Time is given as the following 8 sec

The value of the Momentum is same as impulse.

So, the formula of impulse is given as:

I = Ft

Where

I is the impulse

F is the force

and t is the time

From the given information,

F = 10 N

t = 8 secs

Therefore,

I = 10 × 8

I = 80 Ns.

Momentum is 80 Kgms-1.

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it is important to drink alcohol in moderation and to take steps to support liver health, such as eating a balanced diet, exercising regularly, and avoiding other toxins that can damage the liver. This will help ensure that the liver is able to do its job effectively and that necessary nutrients are being absorbed properly.

If the liver is overworked by constantly trying to break down alcohol, then necessary nutrients may not be absorbed. This is because the liver is responsible for breaking down and processing many of the nutrients in our food, including vitamins, minerals, and amino acids. When the liver is overloaded with alcohol, it can't do its job effectively and these nutrients can pass through the body without being absorbed properly. Alcohol is considered a toxic substance and it needs to be broken down by the liver to be eliminated from the body. The liver can only process a certain amount of alcohol at a time, and if someone drinks more than that, the liver becomes overworked. This can lead to liver damage and other health problems over time. Therefore, it is important to drink alcohol in moderation and to take steps to support liver health, such as eating a balanced diet, exercising regularly, and avoiding other toxins that can damage the liver. This will help ensure that the liver is able to do its job effectively and that necessary nutrients are being absorbed properly.

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Answer:

3/2 R

Explanation:

Let the Mass of man be m, Mass of earth be M.

By Newtons, law of gravitation,

F = GMm/R^2, Where G is gravitational constant

90 = GMm/R^2

When man weighs 40N,

GMm/(New R)^2 = 40

= 4/9 (90)

GMm/(New R)^2 = 4/9 (GMm/R^2)

(New R)^2 = 9/4 R^2

New R = 3/2 R

Therefore, height is 3/2 R

Answer:Boiling

Explanation: If a liquid is heated the particles are given more energy and move faster and faster expanding the liquid. The most energetic particles at the surface escape from the surface of the liquid as a vapour as it gets warmer.

(a) The laptop left your friend's hand at an angle of approximately 45 degrees.

(b) The laptop left your friend's hand with a speed of approximately 7.85 m/s.

(c) The highest point reached by the laptop is approximately 1.23 meters above the starting point.

To determine the answers, we can use the principles of projectile motion. The key variables we need are the initial velocity (speed) and launch angle. The time of flight can also be calculated, which helps us find the highest point reached by the laptop.

(a) To find the angle, we can use the fact that the horizontal distance and time of flight are related. The horizontal distance traveled by the laptop is 8 meters, and the time of flight is 0.4 seconds. The equation for horizontal distance is given by:

Horizontal distance = Initial velocity * cos(angle) * time

Substituting the known values, we have:

8 = Initial velocity * cos(angle) * 0.4

Solving for the angle, we get:

cos(angle) = 8 / (Initial velocity * 0.4)

Taking the inverse cosine (arccos) of both sides, we find:

angle = arccos(8 / (Initial velocity * 0.4))

Substituting the known values, we can calculate the angle to be approximately 45 degrees.

(b) To find the initial velocity, we can use the vertical distance traveled by the laptop. Since the laptop was thrown and caught at the same height, the vertical displacement is zero. The equation for vertical displacement is given by:

Vertical displacement = (Initial velocity * sin(angle) * time) - (0.5 * g * time^2)

Since the vertical displacement is zero, we can set the equation equal to zero:

0 = (Initial velocity * sin(angle) * 0.4) - (0.5 * 9.8 * 0.4^2)

Simplifying and solving for the initial velocity, we find:

Initial velocity = (0.5 * 9.8 * 0.4^2) / (0.4 * sin(angle))

Substituting the known values and the angle calculated in part (a), we can determine the initial velocity to be approximately 7.85 m/s.

(c) To find the highest point reached by the laptop, we need to calculate the vertical displacement at the midpoint of the trajectory. Since the total time of flight is 0.4 seconds, the midpoint will be at t = 0.2 seconds. The equation for vertical displacement at a given time is:

Vertical displacement = (Initial velocity * sin(angle) * time) - (0.5 * g * time^2)

Substituting the known values and t = 0.2 seconds, we can find the vertical displacement:

Vertical displacement = (7.85 * sin(45) * 0.2) - (0.5 * 9.8 * 0.2^2)

Simplifying, we find the vertical displacement to be approximately 1.23 meters above the starting point.

The laptop left your friend's hand at an angle of approximately 45 degrees and with a speed of approximately 7.85 m/s. It reached a maximum height of approximately 1.23 meters above the starting point. These calculations were based on the principles of projectile motion and the given information of the distance, time of flight, and height.

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Answer:

Is safe to use the bag.

Explanation:

To solve this problem we must use Newton's second law which tells us that the resulting force is equal to the product of mass by acceleration.

F = m*a

where:

F = force [N] (units of Newtons)

m = mass = 15 [kg]

a = acceleration = 7 [m/s²]

Now replacing these values in the previous equation:

F = 15*7

F = 105 [N]

F < 230 [N]

The force of 105 [N] is lesser than the maximum resistance force, therefore is safe to use the bag.

Answer:

Because they have already made an impact within our atmosphere

Answer:

Go ogle

Explanation:

lol :)))))))))))))))

The movement of the school bus is an example of kinetic energy. Option 1 is correct choice.

Kinetic energy is the energy of motion and is possessed by any object that is in motion. When the chemical potential energy stored in petroleum is transferred to the engine, it is converted into kinetic energy as the engine moves the bus.

The amount of kinetic energy possessed by an object depends on its mass and velocity. In the case of a school bus, the large mass of the bus and its relatively low velocity mean that it possesses a significant amount of kinetic energy. As the bus moves, it uses this kinetic energy to overcome frictional forces and to do work, such as moving students to and from school. Therefore, the correct answer is option 1 - kinetic.

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Answer:

230Joules

Explanation:

The kinetic energy of the cat plus the dog's energy equals the total kinetic energy

Answer:

no the earth gravitational force field

Answer:

yes, it acts on everything within the earth

Explanation:

Answer:

a) R = 172.82 m, 5.3 north of east    b)   v = (0.24 ± 0.01) m / s

Explanation:

a) the displacement is a vector, so the easiest method to lock is looking for each component

let's start decomposing the vectors

 x₁ = - 160 m

second shift

angle 45 south of east

     cos (-45) = x₂ / d₂

     sin (-45) = y₂ / d₂

     x₂ = d₂ cos 45

     y₂ = -d₂ sin 45

     x₂ = 180 cos 45 = 127.28 m

     y₂ = -180 sin 45 = - 127.28 m

third shift

      cos 35 = x₃ / d₃

      sin 35 = y₃ / d₃

      x₃ = d₃ cos 35

      y₃ = d₃ sin 35

      x₃ = 250 cos 35 = 204.79 m

      y₃ = 250 sin 35 = 143.39 m ₃

X axis

       x_total = x₁ + x₂ + x₃

       x_total = -160 +127.28 +204.79

       x_total = 172.07 m

Y axis  

      y_total = y₁ + y₂ + y₃

      y_total = 0 - 127.28 + 143.39

      y_total = 16.11 m

to compose the displacement we use the Pythagorean theorem

      R = \(\sqrt{x^2 +y^2}\)

      R = \(\sqrt{172.07^2 + 16.11^2 }\)

      R = 172.82 m

in angle is

      tan θ = y_total / x_total

      ten θ = 16.11 / 172.07 = 0.0936

      θ = tan⁻¹ 0.0936

       θ = 5.3

angle is 5.3 north of east

b) the error in the distance is 5%,

               e% = ΔR/R  100

               ΔR = e% R / 100

               ΔR = 5 172.82 / 100

               ΔR = 8.6 m

the time error Dt = 20 s

We calculate the speed and this we calculate the error

      v = R / t

      v = 172.82 / 12 60

      v = 0.240027 m / s

the error in this magnitude is

      Δv = \(\frac{dv}{dR} \ \Delta R + \frac{dv}{dt} \ \Delta t\)

       Δv = \(\frac{1}{t} \ \Delta R + \frac{R}{t^2 } \ \Delta t\)

         Δv = \(\frac{ 8.6}{720} + \frac{172.82 \ 20}{720^2 }\)

         Δv = 0.013 m / s

the measurement result is

         v = (0.24 ± 0.01) m / s

In general, the shorter the wavelength, the greater the danger to living things. Although longer wavelengths also have their hazards, very short wavelengths, such as X-rays and gamma rays, can easily damage living tissue

UV radiation is more damaging when its wavelength is shorter. Shorter wavelength UV light, however, has a lower ability to enter skin. Three bands make up the UV area, which has a wavelength range of 100 to 400 nm. UVA (315-400 nm) (315-400 nm)

A waveform signal's wavelength is defined as the separation between two identical points (adjacent crests) in adjacent cycles as the signal travels through space or along a wire. Its length in wireless systems is typically expressed in metres (m), centimetres (cm), or millimetres (mm) (mm).

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