a block weighing 55 lb is being pushed by a 13 lb force on a smooth surface. determine the acceleration of the block rounded to three significant figures.

To determine the time taken to travel to Los Angeles you should consider the distance traveled.

The displacement of an object is known as the change in position of the object.

It is also the shortest distance between the final position and initial position of an object.

Displacement is a vector quantity because it has both direction and magnitude.

Distance is scalar quantity that measures the space between two points. It is a scalar quantity because it has only magnitude.

To determine the time taken to travel to Los Angeles we consider the speed of the motion, and the distance traveled.

time of motion = distance traveled/speed

Thus, To determine the time taken to travel to Los Angeles you should consider the distance traveled.

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Answer:

Possiable answer by edge:

The shape of a river’s stream bed affects the speed and eroding power of a river by influencing the amount of friction between the water flowing through the river and the stream bed below. Friction is the force that opposes the motion of one surface as it moves across another surface. In a river, there is friction between the flowing water and the stream bed beneath it. Where a river is deep, less water comes into contact with the stream bed, so there is less friction. The reduced friction means there is less opposition to the water’s motion, so the river flows at a greater speed and has more kinetic energy for erosion. On the other hand, where a river is shallow, more water comes into contact with the stream bed, so there is more friction. The increased friction means there is more opposition to the water’s motion, so the river flows at a lesser speed and has less kinetic energy for erosion. Also, the roughness of a stream bed covered with boulders and other obstacles causes the water to flow through the river in a turbulent fashion. This could cause the river to move slower in some cases or erode more in other cases.

Explanation:

summary of answer:

influencing the amount of friction between the water flowing through the river and the stream bed below.

Answer:

2.30×10³

10.3

Explanation:

The rules for significant digits are:

To write 2300.2 in three significant figures, you'll have to write it in scientific notation.

2.30×10³

To write 10.26730 in three significant figures, simply round to the tenths place.

10.3

Answer:

1 m = 39.37 in = 3.281 ft

1500 m * 3.281 ft / m = 4922 ft

(5280 - 4922) / 4922 = .073 = 7.3 %

(Note - 1600 m often replaces the 1 mi run)

The speed of the block as it reaches the end of the ramp, assuming it starts sliding from rest at the top, is approximately 10.5 m/s.

To find the speed of the block as it reaches the end of the ramp, we can use the principles of energy conservation.

The initial potential energy at the top of the ramp is converted into kinetic energy at the bottom. Neglecting friction, the mechanical energy is conserved.

The potential energy at the top of the ramp is given by:

PE = m * g * h,

where m is the mass of the block, g is the acceleration due to gravity (approximately 9.8 m/s²), and h is the vertical height of the ramp.

The vertical height (h) can be calculated using the length of the ramp (L) and the angle of inclination (θ) as:

h = L * sin(θ).

The kinetic energy at the bottom of the ramp is given by:

KE = (1/2) * m * v²,

where v is the speed of the block at the bottom.

Since mechanical energy is conserved, we can equate the initial potential energy to the final kinetic energy:

PE = KE.

Substituting the expressions for potential energy and kinetic energy, we have:

m * g * h = (1/2) * m * v².

Canceling out the mass (m) and substituting the expression for h, we get:

g * L * sin(θ) = (1/2) * v².

Simplifying the equation and solving for v, we have:

v = sqrt(2 * g * L * sin(θ)).

Now we can plug in the given values of the angle (θ = 17 degrees) and the length of the ramp (L = 30.0 m) to calculate the speed (v).

Using the acceleration due to gravity (g ≈ 9.8 m/s²), the calculation is as follows:

v = sqrt(2 * 9.8 m/s² * 30.0 m * sin(17°)).

Evaluating this expression, we find:

v ≈ 10.5 m/s.

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Answer:

the answer is D

as an electron is composed of positive charges

Answer:

D.+1°e symbol represents a type of radiation that has the same mass as an electron and a positive charge.

Explanation:

it is 100% correct!

The weight of the rock at the surface of Venus is 66.5 N

What is the weight of the rock at the surface of Venus ?

On earth,

The weight of the rock at the surface of earth = 75 N

The weight of an object on earth's surface is:

W = m g

Here, m = mass of rock

acceleration due to gravity (g) = 10 m/s²

W= mg

m = \(\frac{W}{g}\)

m = \(\frac{75}{10}\)

m = 7.5 kg

On Venus,

mass (m) = 7.5 kg

acceleration due to gravity(g) = 8.87 m/s²

W= mg

  = 7.5 * 8.87

   =66.5 N

What is acceleration due to gravity?

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Electric current flow is the result of the movement of electrons.

Electric current flow is the movement of electric charges, i.e., electrons, through a conductor such as a wire. A battery or generator source is commonly used to create the flow of charges. When the battery is connected to a wire, it forces electrons out of one end of the battery and pulls them back into the other end. When electrons move through the wire, they create a flow of electric current. A lamp or other electrical device connected to the wire will light up, making it clear that electric current is flowing.

Conductors allow electrons to move easily. Electrons in conductors are in a "sea of electrons," and when an electric field is applied, they flow through the wire, from negative to positive, generating an electric current. Electrical charge flows when free electrons move through the conductor's wire. To be electrically charged, electrons must have a negative charge.

Electrons are tiny, negatively charged subatomic particles that orbit the nucleus of an atom. Electrons are the subatomic particle that carries a negative electric charge in the atom. Electrons are the negatively charged particles that move around the nucleus in shells, according to the theory. The total number of electrons in the atoms of an element equals the number of protons in its nucleus, making it electrically neutral.

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A spherical aberration in a semicircular lens negatively affects the clarity and sharpness of the image formed due to the imperfect convergence of light rays at the focal point.

The effect of spherical aberration observed in a semicircular lens can be explained as follows: Spherical aberration occurs when light rays entering the lens at different distances from the optical axis do not converge at a single focal point.

In a semicircular lens, this aberration results from the curved shape of the lens surfaces, causing rays parallel to the optical axis to focus at different points along the axis.

The main impact of spherical aberration in a semicircular lens is the distortion and blurring of the image formed, as rays from a single point source are not focused sharply onto a single point on the image plane.

This aberration can be minimized by using an aspherical lens, which has a surface profile designed to eliminate the discrepancies in the focusing of light rays.

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Answer:

c 0.10

Explanation:

V=IR

12.0V=I x 120.12ohms

I=0.099

I= 0.10

Answer:

0.4

Explanation:

average velocity =d/t

2/5=0.4

0.4m

Explanation:

sink and fill in space..........

Answer:

The power rating of the coffee maker is 1.4 kW, which means that it uses 1.4 kilowatts of power when it is in operation. To find out how much energy it will transfer every second, we can use the formula:

Energy transferred = Power × Time

Since we want to know the energy transferred every second, we can set the time to 1 second. Therefore:

Energy transferred per second = Power × 1 second

Energy transferred per second = 1.4 kW × 1 second

We can simplify this by converting the unit of power from kilowatts to watts:

Energy transferred per second = 1,400 watts × 1 second

Energy transferred per second = 1,400 joules

Therefore, the coffee maker will transfer 1,400 joules of energy every second.

Answer:

we call a foreign born resident of us a citizen

Answer:

Momentum A measure of how hard it is to stop a moving object. Related to both mass and velocity.

Answer:

350 m/s

Explanation:

Before the explosion, the rocket's momentum is given by:

p = m*v where

p = momentum

m = mass of the rocket

v = velocity of the rocket

Given that the mass of the rocket is 5 kg and its velocity is 200 m/s, we can calculate the momentum as:

p = m*v = 5 kg * 200 m/s = 1000 kg·m/s

After the explosion, the momentum is conserved, which means the total momentum of the two parts is still 1000 kg·m/s. We can use this principle to solve for the velocity of the second part.

Let v1 be the velocity of the 3 kg part, and v2 be the velocity of the other part. Since they are both moving in the same direction, we can write:

p = m1v1 + m2v2

where m1 = 3 kg is the mass of the first part, and m2 is the mass of the second part.

Substituting the known values, we get:

1000 kg·m/s = 3 kg * 100 m/s + m2 * v2

Solving for v2, we get:

v2 = (1000 kg·m/s - 300 kg·m/s) / m2

v2 = 700 kg·m/s / m2

We still need to find the mass of the second part. Since the rocket initially had a mass of 5 kg, and one part has a mass of 3 kg, the other part must have a mass of:

m2 = 5 kg - 3 kg = 2 kg

Substituting this into the equation for v2, we get:

v2 = 700 kg·m/s / 2 kg

v2 = 350 m/s

Therefore, the unknown speed of the other part is 350 m/s.

Given :- A resistor of 150 ohm, hence Resistance (R) = 150 ohm

Potential Difference (v) = 24 V

Current (I) = ?

V = IR

24 = I × 150

I = 24/150

I = 0.16 ampere

hope it helps!

Answer:

A: i cant show the graph i did

B: The biker would have gone 3.6 km in 12 minuets

Explanation:

Answer: A

Explanation:

I took the test

When m, γ, and k are greater than or equal to 0 in the vertical mass-spring system with air resistance, the system will return to equilibrium as time tends to infinity.

In the given differential equation mu ′′+γu ′+ku=0, where m, γ, and k represent the mass, damping coefficient, and spring constant respectively, the terms involving these variables determine the behavior of the system.

When m, γ, and k are greater than or equal to 0, it implies that the mass, damping, and spring properties are non-negative. This means that the system has physical properties that allow for stability and convergence to equilibrium.

The term mu ′′ represents the inertia force, γu ′ represents the damping force, and ku represents the spring force. When these forces are balanced and there are no external forces, the system is in equilibrium.

In the absence of external forces and with non-negative values for m, γ, and k, the system's dynamics will eventually dampen out the initial displacement, bringing the system back to equilibrium. This behavior is observed as time tends to infinity.

The non-negativity of these parameters ensures that the forces acting on the system do not cause uncontrollable oscillations or instability, leading to a return to equilibrium over time.

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Answer:

Newton's third law: If an object A exerts a force on object B, then object B must exert a force of equal magnitude and opposite direction back on object A. This law represents a certain symmetry in nature: forces always occur in pairs, and one body cannot exert a force on another without experiencing a force itself.

Explanation:

Newton's third law: If an object A exerts a force on object B, then object B must exert a force of equal magnitude and opposite direction back on object A. This law represents a certain symmetry in nature: forces always occur in pairs, and one body cannot exert a force on another without experiencing a force itself.

It would take approximately 21.12 years to reach Pluto at a constant speed of 40,500 kilometers per hour.

To determine the time it would take to reach Pluto at a constant speed of 40,500 kilometers per hour, we need to divide the distance to Pluto by the speed of the ship.

The distance from Earth to Pluto is given as 7.5 billion kilometers. To convert this distance to kilometers per year, we need to divide it by the number of kilometers in a year.

There are approximately 8,760 hours in a year (365 days * 24 hours), so we can calculate the speed in kilometers per year by multiplying the speed in kilometers per hour by 8,760.

40,500 kilometers per hour * 8,760 hours/year = 355,260,000 kilometers per year.

Now, we can find the time it would take to reach Pluto by dividing the distance to Pluto by the speed in kilometers per year:

7,500,000,000 kilometers / 355,260,000 kilometers per year ≈ 21.12 years.

Therefore, it would take approximately 21.12 years to reach Pluto at a constant speed of 40,500 kilometers per hour.

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Answer:

566.73 N and 78.7°

Explanation:

I've attached a diagram to show the forces and angle as indicated in the question.

From the free body diagram, we can see that the resultant force is labeled as C.

Using law of cosine, we can find C.

Thus:

C² = a² + b² - 2(ab)cos θ

C = √(a² + b² - 2(ab)cos θ)

C = √(600² + 800² - 2(600 × 800)(cos 45))

C = √(360000 + 640000 - (960000 × 0.7071))

C = 566.73 N

Direction will be gotten by using sine rule:

800/sin b = 566.73/sin 44

sin b = (800sin 44)/566.73

sin b = 0.9806

b = sin^(-1) 0.9806

b = 78.7°

Answer:

an instrument for measuring the density of liquids.

Explanation:

The color that will have its first-order maximum closest to the center of the diffraction pattern is Blue.

The location of the first-order maximum in a diffraction pattern depends on the wavelength of the incident light and the spacing between the slits in the grating. The spacing between slits in this case is given by 1 cm/10,000 = 0.0001 cm.

Using the formula for the location of the first order maximum in a diffraction pattern, d sinθ = mλ, where d is the spacing between slits, θ is the angle between the incident light and the diffracted light, m is the order of the maximum, and λ is the wavelength of the incident light, we can solve for the wavelength that will have its first order maximum closest to the center of the diffraction pattern.

Assuming that the incident light is white light, which is composed of a range of wavelengths, we can find the wavelength that will have its first-order maximum closest to the center by considering the color that has the shortest wavelength. This is blue light, which has a wavelength of approximately 400-450 nm.

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Answer:

potential energy=mgh (weight × height)

m=20kg

g=9.8m/s2

h=8

20×9.8×8=1568

The potential energy is 1568J

Answer:

Potential energy = m × g × h

m = 20 kg

acceleration due to gravity = 9. 8 m/ s 2

height ( h ) = 8

= 20 × 9.8 × 8

= 1568

:. potential energy = 1568 Joule

Blood travels throughout the body as follows:

Circulation is the continuous movement of blood throughout the body by the circulatory system. It consists of the heart, blood vessels (arteries, veins, and capillaries), and blood. The heart acts as a pump, sending oxygen-rich blood through the arteries to the body's cells, and then returning oxygen-depleted blood through the veins back to the heart.

The exchange of oxygen, nutrients, and waste products between the blood and cells occurs through the capillaries. This continuous flow of blood helps to maintain the body's functions and overall health.

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Answer:

Less than 50N

Explanation:

Given that a pair of wires holding a hanging light that weighs 50N.

Since the hanging weight is equal to 50 N, the sum of the tension in the wires will also experience the same magnitude of force acting on the weight.

Considering each of the wire, the tension on each of the wire will surely be less than 50N

Therefore, the tension in each wire is less than 50N

The magnetic force vectors on the wires can be determined using the right-hand rule. If the wires aren't restrained, they will be pushed apart by the magnetic forces.

The magnetic force vectors on the wires can be determined using the right-hand rule. If you point your right thumb in the direction of the current in one wire, and your fingers in the direction of the current in the other wire, your palm will face the direction of the magnetic force on the wire.

At the points indicated with dots, the magnetic force vectors would be perpendicular to both wires, pointing into the page for the wire with current going into the page, and out of the page for the wire with current coming out of the page.

The diagram to illustrate the magnetic force vectors on the wires is attached.

If the wires aren't restrained, they will be pushed apart by the magnetic forces. The wires will move in opposite directions, perpendicular to the plane of the wires. This is because the magnetic force is perpendicular to both the current and the magnetic field, which in this case is created by the other wire. As a result, the wires will move away from each other in a direction perpendicular to both wires.

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