If an object is not moving, it is in {{c1::static equilibrium}}, if it is moving but not accelerating, it is in {{c1::dynamic equilibrium}}

Answer:

Concept: Physical Constants

The difference between Length and Time is: Length is a measure of distance while Time is a quantity or measure of period.

Length can defined as a fundamental quantity that describe the total space occupied by an object from end to end or the distance of an object from end to end.

Time can be defined the duration of an occurrence in space. Time is so important as it helps us adequately know the period of an event or occurrence.

In conclusion, The difference between Length and Time is: Length is a measure of distance while Time is a quantity or measure of period.

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The work done in stretching the spring from its natural length to 10 inches beyond its natural length is 112 lb·in.

The work done in stretching a spring is given by the formula:

\(\[ W = \frac{1}{2} k (x_f^2 - x_i^2) \]\)

In this case, the spring is stretched 4 inches beyond its natural length, so the initial displacement is 4 inches. The force required to hold the spring at this displacement is 16 lb. We can use Hooke's Law to find the spring constant:

\(\[ k = \frac{F}{x_i} = \frac{16 \, \text{lb}}{4 \, \text{in}} = 4 \, \text{lb/in} \]\)

Now, we can calculate the work done in stretching the spring to 10 inches beyond its natural length:

\(\[ W = \frac{1}{2} (4 \, \text{lb/in}) \left( (10 \, \text{in})^2 - (4 \, \text{in})^2 \right) = 112 \, \text{lb·in} \]\)

Therefore, the work done in stretching the spring is 112 lb·in.

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The SI unit of the proportionality constant G is given as

[G]  = [M]^3 / [Kg  s²]

Newton's law of universal gravitation states that  every particle attracts every other particle in the universe with a force that is proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

We substitute [kg]=[M], [m]=[L], and [F]-[kg x m] / [s²]- [M] [L]/ [T²]

into

Newton's law of universal gravitation to obtain

[M][L] [G][M] [T [CF

Solving for [C] then gives

m³

[G] = [L]^3  / [M][T]² kg

[G]  = [M]^3 / [Kg  s²]

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The drift speed of electrons that compose current in a flashlight is about 1000 cm/s. The given statement is True.

The drift speed is defined as the speed at which free electrons in a conductor move when a potential difference is applied across the conductor. When a battery is connected to a flashlight, the voltage across the battery causes an electric field to exist inside the wires of the flashlight.

Due to this electric field, free electrons within the wire begin to move through the wire. However, the drift speed of electrons in a flashlight is quite slow, typically around 0.1 mm/s or 1000 cm/s.

Therefore, This is because electrons interact with the crystal lattice of the conductor, causing them to bounce off of atoms and other electrons, thus slowing their speed.

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Negative mass, if it exists, would exhibit unique behavior compared to positive mass.

In a scenario with two negative masses, they would likely repel each other due to their inverse properties, as described by the hypothetical concept of negative mass.

When interacting with a positive mass, a negative mass might cause mutual acceleration, resulting in both objects accelerating towards each other, rather than the attractive force observed between two positive masses.

The existence of negative mass remains speculative and is not supported by current scientific evidence.

While it provides interesting theoretical possibilities, more research is needed to determine if negative mass could exist within our physical universe.

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Explanation:

Find an energy is E =mgh, so E = 45*10*19=8550j

Answer:

follow me and mark me brainliest

Answer: No, they cannot

Explanation:

Because every individual has different emotions, different beliefs.

Explanation:

I hope this really can help you...

well done friend...

Answer: 2 m/s to the right

Explanation:

This is a conservation of momentum question:

p before = p after → m1v1 + m2v2 = m3v3 + m4v4

**Note- if the speed is to the left, plug in a negative v!

5(2) + 3(-3) = 5(-1) + 3(v4) → 1 = -5 + 3v4 → v4 = +2 m/s :)

Answer:264m

Explanation: 12 x 22= 264m

The kangaroo's horizontal speed will be 9.7 m/s and its departure speed will indeed be 10.65 m/s.

By observing the pace at which this compressed region moves through the medium, we may determine the sound speed. The sound wave travels at a speed of around 343 meters per second in low humidity at 20 degrees Celsius.

The following equation relates the distance to the direction and initial velocity:

d = [v₀²sin2θ]/g, where θ – the angle of the jump.

Thus, v₀² = gd / (sin2θ) = (9.8×8)/0.69 = 113.62

v₀ = 10.65 m/s ( the take off speed).

The horizontal velocity equals:

vₓ = v₀cos 22° = 10.65 m/s × 0.92 = 9.7 m/s

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When you push a pencil off your desk, the energy transformation that takes place is that potential energy transforms into kinetic energy.

The correct answer to the given question is option C.

Potential energy is the energy stored within an object because of its position or configuration.

In this scenario, the pencil has potential energy because of its elevated position on the desk. When the pencil is pushed off the desk, it begins to move, which means that it has kinetic energy. Kinetic energy is the energy of motion.

As the pencil falls off the desk, its potential energy is transformed into kinetic energy, which is the energy that results from its motion. The faster the pencil falls, the greater its kinetic energy will be because kinetic energy is directly proportional to the square of an object's velocity.

Therefore, when you push a pencil off your desk, the potential energy that it has because of its elevated position is transformed into kinetic energy as it falls towards the ground.

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Answer:

468.42N

Explanation:

Here,

Work done(W)=1780J

Displacement(s)=3.8m

As we have,

Work=Force×displacement

Now,

\(\hookrightarrow 1780J=F\times3.8m\\\\\hookrightarrow \frac{1780J}{3.8m} =F\\\\\hookrightarrow F=468.42N\)

Answer: so basically, Newtons Law states that every particle attracts every other particle in the universe with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

Explanation: newtons law simplified in my opinion is a physical law that describes the attraction between two objects with mass.

hope this helps.

Answer:

Explanation:

she rieat

q=mcΔt

110=100.c.(70-60)

c=0.11

Answer:

110 cal kg⁻¹°C⁻¹

Explanation:

Formula to find the specific heat capacity is :

Q = m c Θ

Here,

Q = heat energy

m = mass

c = specific heat capacity

Θ = change in temperature

Now let us find the specific heat capacity now.

Q = m c Θ

110cal = 1kg × c × (70 - 60 ) °C

110cal= 0.1kg × c × 10°C

110 =  1 c

Divide both sides by 1.

c = 110 cal kg⁻¹°C⁻¹

The frequency of a tsunami with a speed of 750 km/h and a wavelength of 500 km is **0.0015 Hz**.

To find the frequency of a wave, we can use the formula: **frequency = speed / wavelength**. In this case, the speed of the tsunami is 750 km/h and the wavelength is 500 km. First, we need to convert the speed to a consistent unit, so we'll change 750 km/h to 208.33 m/s (1 km = 1000 m and 1 h = 3600 s). Then, we can divide the speed by the wavelength: 208.33 m/s / 500,000 m = 0.00041667 s^(-1) or 0.0015 Hz. This means the frequency of the tsunami wave is 0.0015 Hz, which indicates the number of complete oscillations per second.

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The angular velocity of the rotating tires is 76.27 rad/s.

The angular velocity, ω, of a rotating object is the rate at which it rotates around a chosen center point,

ω = Δθ / Δt (angular displacement over time).

A truck with 0.347-m-radius tires travels at 26.4 m/s. We need to determine the angular velocity of the rotating tires in radians per second. The equation that relates speed and angular velocity is

v = ωr

where,ω = angular velocityv = linear velocity, r = radius of the tire. The angular velocity is given by the equation

ω = v / r

Substitute the given values into the formula;

ω = 26.4 m/s / 0.347 mω = 76.27 rad/s

Hence, the angular velocity of the rotating tires in radians per second of a truck with 0.347-m-radius tires that travels at 26.4 m/s is 76.27 rad/s.

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Answer:

Catapult on the ground: Normal, gravity

Catapult (I'm assuming launching marshmallow): Reaction of Force Applied

Marshmallow: Force Applied

Explanation:

This is the forces that act on a stationary object and a launched object. The catapult may also experience a force friction if your teacher is taking a more practical sense.

The numerical value for the magnitude of the tire's forward momentum is 96 kg m/s.

Momentum is the measurable quantity of movement in a body or object and is used in science to define the quantity of motion.

Momentum if determined from the product of mass and velocity of a body.

P = mv

where;

The numerical value for the magnitude of the tire's forward momentum is calculated as follows;

P = 12 kg x 8 m/s

P = 96 kg m/s

Thus, the numerical value for the magnitude of the tire's forward momentum is 96 kg m/s.

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Answer:

Charging by friction

Explanation:

Two different materials are rubbed against each other and acquire opposite charges when separated. During this process, electrons get transferred from one material to the other through contact and friction.

The points about the stars from the appendix are: Sirius A is the most luminous star within 12 parsecs. It is also the brightest star in our sky, even though it is not the closest. The list of the brightest stars will include the very luminous hot stars from distances greater than 12 light-years, while the list of the fainter yet closer low-mass stars will not.

The list of stars within 12 light-years is volume-limited, which means that almost all of the stars within that distance are listed regardless of luminosity. Such a list is a better representative of the total population of stars and is more plausible to be dominated by low-mass stars. The list of brightest stars includes only those stars that are above a certain apparent brightness threshold.

Therefore, the faintest nearby stars are excluded, but the brightest and rarer hot stars are included in higher proportion than they are in a volume-limited list.

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The acceleration of the left-hanging mass is  6.811 m/s²

Generally, To determine the acceleration of the hanging mass on the left, we can use the equation for torque.

Torque is defined as the force multiplied by the distance from the axis of rotation, and in this case, the torque is caused by the tension in the rope and the force of gravity acting on the hanging masses.

The equation for torque is:

τ = (F_L - F_R) * r_L

where

The force on the left hanging mass is:

F_L = m_L * a

where m_L is the mass of the left hanging mass and a is the acceleration.

The force on the right hanging mass is:

F_R = m_R * g

where

m_R is the mass of the right hanging mass and

g is the acceleration due to gravity.

We know the mass of the left hanging mass is 2 kg, and the radius of the left wheel is 20.81 cm, so we can substitute these values into the torque equation:

τ = (m_L * a - m_R * g) * r_L

τ = (2 * a - 1.39 * 9.8) * 0.2081

We know the torque is zero, so we can set the left side of the equation to zero and solve for a:

0 = (2 * a - 1.39 * 9.8) * 0.2081

a = 6.811 m/s²

The acceleration of the left-hanging mass is  6.811 m/s²

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Answer:

0.4 g/cm^3

Explanation:

The density of an object can be found using the following formula.

d= m/v

where m is the mass and v is the volume.

The mass of the metal is 6 grams and the volume is 15 centimeters^3

m=6 g

v= 15 cm^3

Substitute these into the formula.

d= 6 g/ 15 cm^3

Divide 6 g by 15 cm^3 (6/15=0.4)

d= 0.4 g/ cm^3

The density of the metal is 0.4 grams per cubic centimeter.

Density = (mass) / (volume)

Density = (6 g) / (15 cm³)

Density = (6/15) (g/cm³)

Density = 0.4 g/cm³

This 'metal' has less than half the density of water, and it floats on water !  It cannot be of Earthly origin, and must have been dropped here by aliens.

Either that, or else the metal has been hammered and stretched and beaten out and shaped so that it has an artificially large volume ... something like the way sailing ships are made out of thick plates of steel.

Answer:

he will not be drowned

Explanation:

Question says , the height of the student = 4 feet,

Depth of the pool( in feet ) be x ( say ) which is less than  4 feet,

Clearly, the depth of the pool < height of the student,

This means, if the student goes for swimming in the pool, however he does not know swimming, he will not be drowned until he is suffering from an injury or external force.

Answer:

B. 18 m/s west

Explanan

I took the test

Engineers are using computer models to study train collisions to design safer train cars. They start by modeling an elastic collision between two train cars traveling tower each other. Car 1 is traveling east at 6 m/s and has a mass of 3,154 kg. Car 2 is traveling west at 23 m/s and has a mass of 8,296 kg. After the collision, car 1 has a final velocity of 7 m/s west. The final velocity of car 2 is 23 m/s east. Hence, Option C is the correct answer.

Conservation of momentum states that for two or more bodies in an isolated system acting upon each other, their total momentum remains constant unless an external force is applied. Therefore, momentum can neither be created nor destroyed.

Using conservation of momentum,

m1v1 + m2v2 = m1 v1' + m2 v2'

Given,

m1 = 3154 kg

v1= 6m/s

m2 = 8296 kg

v2 = 23 m/s

v1' = 7m/s

v2' = ?

Substituting the values,

3154 * 6 + 8296 * 23 = 3154 * 7 + 8296 v2'

209732 - 22078 = 8296 v2'

187654 = 8296 v2'

v2' = 22.62 ≈ 23 m/s east

Car 1 is traveling east at 6 m/s and has a mass of 3,154 kg. Car 2 is traveling west at 23 m/s and has a mass of 8,296 kg. After the collision, car 1 has a final velocity of 7 m/s west. The final velocity of car 2 is        23 m/s east.

Hence, Option C is the correct answer.

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