if the unit for force is f, the unit for veocity v, and the unit for time t, then the unit for energy is

Answer:

D : Add more soil

Explanation:

An object is illuminated by red, green, and blue light if it is illuminated by white light. Only red and green light will be reflected from an item if it absorbs blue light.

White light causes an object to seem blue because it reflects only blue light and absorbs all other colors. Since there is no color to reflect when that object is placed in red light, it absorbs all of the red light that strikes it and appears black.

We mostly notice colors in reflected light. The room's variously colored objects reflect some of the white light while absorbing the rest. A blue shirt shows that white light contains blue light because blue wavelengths are reflected by blue and are absorbed by blue.

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Answer:

Your answer would be D.

After 10 seconds, the object's displacement can be calculated as follows: An object has a positive velocity when it is moving in the right direction.

If an object is slowing down, its acceleration vector is pointing away from the direction in which it is moving (in this case, a negative acceleration).

Initial speed (u) equals 2 m/s

Final speed (v) is 32 m/s.

The speed of sound is 3 m/s2.

Position (s) =? v2 = u2 + 2as

32² = 2² + (2 × 3 × s)

1024 = 4 + 6s

assemble similar terms

1024 - 4 = 6s

1020 = 6s

6 divided by both sides

s = 1020 / 6

s = 170 m

The displacement is 170 m as a result.

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The required type of motion can Margaret predicts this coin will have is a circling motion. Option B is correct.

motion is defined as an object's change of position over time is called motion.

Here,

As Margaret drops a coin down a funnel-shaped object. The coin rolls around the outer edge in a circular motion. As it moves closer to the bottom, it completely rolls around the edge.

Margaret can predict that the second coin will have a circling motion as it moves down the funnel-shaped object. The shape of the funnel will cause the coin to roll around the edge in a circular motion.

Thus, the required type of motion can Margaret predicts this coin will have is a circling motion. Option B is correct.

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The acceleration we calculated is negative, it means the force applied is not enough to pull Block A upward. The 10 lb force is insufficient to overcome the 20 lb weight of Block A, and thus, it is impossible to pull the cord down 4 ft under the given conditions.

To determine the time needed to pull the cord at B down 4 ft starting from rest, we need to consider the forces acting on the system and use Newton's second law of motion. We'll assume that the pulleys and cords are frictionless and massless.

Given:
- Force applied to the cord, F = 10 lb
- Block A weight, W = 20 lb
- Distance to pull the cord down, d = 4 ft

1. Find the acceleration of the system.
Newton's second law states that F = ma, where F is the net force acting on an object, m is the mass, and a is the acceleration.

For this system, the net force acting on Block A is the difference between the applied force and the weight of Block A: F_net = F - W.
F_net = 10 lb - 20 lb = -10 lb (negative sign indicates the force is acting upward).

2. Calculate the mass of Block A.
To find the mass of Block A, use the formula W = mg, where W is the weight, m is the mass, and g is the acceleration due to gravity (approximately 32.2 ft/s²).
m = W / g
m = 20 lb / 32.2 ft/s² ≈ 0.621 lb·s²/ft

3. Calculate the acceleration of Block A.
Now, we can use F_net = ma to calculate the acceleration of Block A.
a = F_net / m
a ≈ -10 lb / 0.621 lb·s²/ft ≈ -16.1 ft/s²

4. Determine the time needed to pull the cord down 4 ft.
Use the equation of motion: d = 0.5 * a * t², where d is the distance, a is the acceleration, and t is the time.
4 ft = 0.5 * (-16.1 ft/s²) * t²
Solving for t:
t² ≈ 4 ft / (-8.05 ft/s²)
t² ≈ -0.4968 s²

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White light is created by mixing light of all wavelengths at an equal intensity. This is so because white light is made up of all the visible spectrum's colours.

A spectrum is a collection of electromagnetic radiation with a variety of energy wavelengths or frequencies. The characteristics of the radiation, such as its wavelength, frequency, and energy, are used to categorise the electromagnetic spectrum into various sections. The colours of the rainbow, from violet (with the shortest wavelength) to red, are all part of the visible spectrum, which is the portion of the electromagnetic spectrum that can be seen by the human eye (longest wavelength). Radio waves, microwaves, infrared, ultraviolet, X, and gamma rays are other types of electromagnetic radiation. Applications for each type of radiation vary, including communication (radio waves), cooking (microwaves), and medical imaging (X-rays). A potent tool for studying the interactions between electromagnetic radiation and matter is spectroscopy.

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The average velocity of the 150 kg cart on the 75-meter roller coaster track is approximately 0.42 meters per second.

To find the average velocity of the cart, we need to use the formula:

Average velocity = Total displacement / Total time

In this case, the total displacement is 75 meters (the length of the track) and the total time is 3 minutes, which we need to convert to seconds (1 minute = 60 seconds, so 3 minutes = 180 seconds).

Average velocity = 75 meters / 180 seconds

Average velocity ≈ 0.42 meters per second

So, the average velocity of the 150 kg cart on the 75-meter roller coaster track is approximately 0.42 meters per second.

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The switch that adjusts the magnetic field to be either nearly uniform or have a strong gradient will affect the current in the two coils differently.

When the magnetic field is nearly uniform at the center, the current in both coils will remain relatively unchanged. The uniform field will not induce any significant voltage in the coils, so the current will flow through them as usual.

However, when the magnetic field has a strong gradient, the current in the two coils will be affected differently. The rapidly changing field will induce a voltage in the coils according to Faraday's law of electromagnetic induction. This induced voltage will result in a change in the current flowing through the coils. The magnitude and direction of the induced current will depend on the specific characteristics of the coils and the magnetic field gradient.

In summary, the switch that changes the magnetic field from uniform to having a strong gradient will induce a change in the current flowing through the coils due to the induced voltage.

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Answer:

Approximately \(6.04\; {\rm m\cdot s^{-2}}\), assuming that \(g = 9.81\; {\rm N \cdot kg^{-1}}\) and that the mass of the bag is negligible.

Explanation:

There are two forces on the paper bag:

It is given that the tension in the handle \(F(\text{tension})\) should not exceed \(298\; {\rm N}\).

Let \(g\) denote the gravitational field strength. The mass of the bag and its contents is \(m = 18.8\; {\rm kg}\). Their weight will be \(F(\text{weight})= m\, g\).

SInce \(F(\text{tension})\) and \(F(\text{weight})\) are in opposite directions, the resultant force on the bag will be:

\(F(\text{net}) = F(\text{tension}) - F(\text{weight})\).

Divide the net force by mass to find the acceleration \(a\) of the bag:

\(\begin{aligned}a &= \frac{F(\text{net})}{m} \\ &= \frac{F(\text{tension}) - F(\text{weight})}{m} \\ &= \frac{F(\text{tension}) - m\, g}{m} \\ &= \frac{F(\text{tension})}{m} - g\end{aligned}\).

Since \(F(\text{tension}) \le 298\; {\rm N}\):

\(\begin{aligned} a &= \frac{F(\text{tension})}{m} - g \\ &\le \frac{298\; {\rm N}}{18.8\; {\rm kg}} - 9.81\; {\rm N \cdot kg^{-1}} \\ &\approx 6.04\; {\rm N \cdot kg^{-1}} \\ &=6.04\; {\rm m\cdot s^{-2}}\end{aligned}\).

Note the unit conversion: \(1\; {\rm N \cdot kg^{-1}} = 1\; {\rm (kg \cdot m\cdot s^{-2})\, kg^{-1}} = 1\; {\rm m\cdot s^{-2}}\).

Answer:

Acceleration = 6.05 m/s²

Explanation:

Fmax = 298 N

m = 18.8 kg

g = 9.8 m/s²

___________

a - ?

According to Newton's 2nd law:

Fmax = m·(g + a)

g + a = Fmax / m

Acceleration:

a = Fmax / m - g

a = 298 / 18.8 - 9.8 ≈ 6.05 m/s²

Answer:

The only way to increase a wavelength without changing speed is by decreasing the frequency. This happens when a note is lowered, and the crest of each waves separates farther and farther.

Higher frequencies consist of compact wavelengths.

Answer:

The gravitational potential energy it had from being above the ground is converted to kinetic energy as the rock falls. As kinetic energy increases, the velocity of the rock will also increase.

Explanation:

Starting from rest on a circular track with a radius of 300 m and a constant tangential acceleration of 0.75 m/s², the car will travel a distance of approximately 0.2119 meters or 21.19 centimeters in 0.75 seconds.

To determine the distance traveled and the time elapsed by the car starting from rest on a circular track with a radius of 300 m and a constant tangential acceleration of 0.75 m/s², we can use the equations of circular motion.

The tangential acceleration is the rate of change of tangential velocity. Since the car starts from rest, its initial tangential velocity is zero (v₀ = 0).

Using the equation:

v = v₀ + at

where v is the final tangential velocity, v₀ is the initial tangential velocity, a is the tangential acceleration, and t is the time, we can solve for v:

v = 0 + (0.75 m/s²) * t

v = 0.75t m/s

The tangential velocity is related to the angular velocity (ω) and the radius (r) of the circular track:

v = ωr

Substituting the values:

0.75t = ω * 300

Since the car starts from rest, the initial angular velocity (ω₀) is zero. So, we have:

ω = ω₀ + αt

ω = 0 + (0.75 m/s²) * t

ω = 0.75t rad/s

We can now substitute the value of ω into the equation:

0.75t = (0.75t) * 300

Simplifying the equation gives:

0.75t = 225t

t = 0.75 seconds

The time elapsed is 0.75 seconds.

To calculate the distance traveled (s), we can use the equation:

s = v₀t + (1/2)at²

Since the initial velocity (v₀) is zero, the equation becomes:

s = (1/2)at²

s = (1/2)(0.75 m/s²)(0.75 s)²

s = (1/2)(0.75 m/s²)(0.5625 s²)

s = 0.2119 meters or approximately 21.19 centimeters

Therefore, the car travels a distance of approximately 0.2119 meters or 21.19 centimeters.

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According to Coulomb's law, the charge on a device and the distance between two. The electric force between particles is affected. The circumstance will cause two positively charged particles to repel one another; hence, option A is the best choice.

Coulomb's law states that the electrical force between two charged bodies is inversely proportional to the square of the separation distance between the two bodies and directly proportional to the product of the quantity of charge on the bodies.

The formula for Coulomb's law in mathematics is written as

F=kQ₁Q₂/r²

The electric force is F.

The Coulomb constant is k.

Charges Q1 and Q2 are involved.

The separation between the charges is measured in units of r.

The correct choice is A because, in line with Coulomb's rule, when two particles have a positive charge, the effect of force will be that they repel one another.

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The spring constant of the spring given that it extends from 2 m to 4 m when a 40 N weight is hung off it is 20 N/m

First, we shall determine the extension of the spring. Details below:

Extension = New length - Original length

Extension = 4 - 2

Extension = 2 m

Finally, we shall determine the spring constant. Details below:

F = Ke

40 = K × 2

Divide both sides by 2

K  = 40 / 2

K = 20 N/m

Thus, we can conclude that the spring constant is 20 N/m

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Satellite mass is 1.69 x 10²² kg; Distance to Corus is 6,760 km; Gravitational acceleration is 3.77 m/s²; Gravitational force is 1.26 x 10¹⁰ N; Minimum orbit speed is 3.25 km/s.

To estimate the mass of the satellite, we can use the formula for the period of a satellite's orbit, which is given by \(T=2\pi \sqrt(r^{3} /GM)\), where T is the period, r is the distance between the satellite and the center of Corus, G is the gravitational constant, and M is the mass of Corus.

We know that the period of the satellite is 15 Earth days, which is approximately 1.296 x 106 seconds. We also know that the distance between Corus and the satellite is the sum of the radius of Corus and the altitude of the satellite.

Assuming the altitude of the satellite is 500 km, which is similar to the altitude of the International Space Station, we can estimate the distance to be 6,760 km.

To calculate the satellite's mass, we can rearrange the formula to solve for M, which gives \(M=(4\pi ^{2} r^{3} )/(GT^{2} )\). Substituting the known values, we get M = 1.69 x 1022 kg.

Using the formula for gravitational acceleration,\(g = G (M/r^{2} )\), we can calculate the gravitational acceleration towards the core of Corus. Substituting the known values, we get g=3.77 m/s².

To calculate the gravitational force between the satellite and Corus, we can use the formula for gravitational force, \(F=G(Mm/r^{2} )\) , where m is the mass of the satellite. Substituting the known values, we get F = 1.26 x 1010 N.

Finally, to calculate the minimum speed of the satellite to orbit Corus, we can use the formula for circular velocity, \(v=\sqrt(GM/r)\). Substituting the known values, we get v = 3.25 km/s.

In summary, a suitable mass for the satellite is approximately 1.69 x 1022 kg, the distance between the satellite and Corus's surface is approximately 6,760 km, the gravitational acceleration towards the core of Corus is approximately 3.77 m/s².

The gravitational force between the satellite and Corus is approximately 1.26 x 1010 N, and the minimum speed of the satellite to orbit Corus is approximately 3.25 km/s.

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Complete Question:

A new planet called "Corus" was discovered by a team of astronomers that is 60 x 106 km away from Earth: A satellite was launched by a rocket from Earth to reach Corus. At a specific distance from Corus, the rocket releases the satellite to the orbit of the planet The satellite makes one complete revolution around Corus in 15 Earth days. If Corus has a similar mass to Mars, propose a suitable mass of the satellite and estimate:

i. Distance between the satellite and the Corus's surface

ii. Satellite's gravitational acceleration towards the core of Corus

iii. Gravitational force between the satellite and the Corus

iv. Minimum speed of the satellite to orbit Corus

Answer:

v = 20.31 m/s

Explanation:

p = mv -> v = p/m = 32,500 kg*m/s / 1,600 kg = 20.31 m/s

The sensor that allows you to determine an individual's forced vital capacity (FVC) is the (a) spirometer.

A spirometer is a specialized device used to measure lung function. It measures the volume and flow of inhaled and exhaled air, providing valuable information about respiratory health.

By analyzing the FVC, which is the maximum amount of air a person can forcefully exhale after taking a deep breath, respiratory conditions such as obstructive or restrictive lung diseases can be diagnosed and monitored.

Dynamometers are used to measure grip strength, hand grip heart rate monitors monitor heart rate during exercise, and EKG/EMG sensors are used to measure electrical activity of the heart and muscles, respectively. While these sensors provide important health information, they do not directly measure FVC.

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Complete question :

Which of these sensors will allow you determine an individual's forced vital capacity (FVC)?

a. Spirometer

b. Dynamometer

c. Hand grip heart rate monitor

d. EKG/EMG sensor

Answer:

A. Doubling the mass

Explanation:

Doubling the mass increases the kinetic energy of a car the most.

Doubling the mass increases the kinetic energy of the car.

           1 Joule = 1 Kg m²/ s².

Hence, Option A is the correct answer.

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TRUE - When comparing the momentum of two objects, one must take into account both their mass and their velocity, as both factors play an equal role in determining the momentum.

Law of momentum conservation According to the law, the system's momentum is conserved in the absence of external influences. That implies that the entire amount of momentum before and after the impact is equal.

The total momentum before a collision between two objects equals the total momentum after the impact (in the absence of external forces). The law of conservation of momentum is this. It is real.

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Answer:

True Edg2020

Explanation:

Answer: true

Explanation:

because I say so :P

Answer:

With sonar, what happens to sound pulses from a ship after they hit the ocean floor? ... They bounce back to the ship.

Explanation:

Answer:

587 N

Explanation:

So there is 198 N, 202 N, 187 N on the left

And 155 N, 252 N, 168 N on the right

So what I am thinking is adding them to get one answer for the left also one from the right.

Left : 202 + 198= 400 + 187= 587 N

Right : 155 + 252= 407 + 168= 575 N

Maybe the most force is greater

587 N > 575 N

Answer: 472.556m⋅s−1

Explanation: λ=7.83cm=7.83⋅(1cm)=7.83⋅(1cm×0.01m1cm)=0.0783m

\(\huge\underline\mathtt\colorbox{cyan}{G=}\)

\(6.673 \times {10}^{ - 11} \)

And unit is Nm^2/kg^2

Explanation:

The attractive force between two bodies when multiplied by the product of the masses of two bodies and divided by the square of the distance between them.

Answer:

Pressure is the force acting normally per unit area.

Force.

Area.

This also proved by formula:

P=F/A.

Also pressure due to liquid depends on density ,gravity and height