19) Study the chart above. Which statement is TRUE regarding natural and synthetic (manufactured) fibers?
A) Glass is a natural material.
B) Staple fibers do not come from animals.
C) Organic manufactured materials are either synthetic or natural plastics.
D) Synthetic polymers including polyester and nylon, make up a large category of synthetic material.

The mass of the object is approximately 0.457 kg.

The mass of the object attached to the trolley can be calculated using the principle of conservation of momentum. Since the two trolleys couple together and move as a single system after the collision, the total momentum before and after the collision should be the same. Given the mass of one trolley is 0.80 kg and the initial speed is 1.1 m/s, the momentum before the collision is 0.80 kg * 1.1 m/s = 0.88 kg·m/s. After the collision, the total mass is the sum of the two trolleys, and the final speed is 0.70 m/s.

Using the momentum equation, the mass of the object can be calculated as follows:

Total momentum before collision = Total momentum after collision

0.88 kg·m/s = (0.80 kg + mass of the object) * 0.70 m/s

Solving for the mass of the object, we get:

0.88 kg·m/s = (0.80 kg + mass of the object) * 0.70 m/s

0.88 kg·m/s = 0.56 kg + 0.70 kg * mass of the object

0.88 kg·m/s - 0.56 kg = 0.70 kg * mass of the object

0.32 kg = 0.70 kg * mass of the object

Dividing both sides by 0.70 kg, we find:

mass of the object = 0.32 kg / 0.70 kg = 0.457 kg

The two trolleys collide and couple together, the total momentum before the collision is equal to the total momentum after the collision according to the principle of conservation of momentum.

The momentum of an object is defined as the product of its mass and velocity. In this case, the mass of one trolley is known (0.80 kg) and the initial speed is given (1.1 m/s), allowing us to calculate the momentum before the collision.

After the collision, the two trolleys move together at a new speed (0.70 m/s). By setting the initial momentum equal to the final momentum and solving for the unknown mass of the object, we can find its value.

In the calculation, we subtract the masses of the two trolleys from the total mass in order to isolate the mass of the object.

Dividing the difference in momentum by the product of the known mass and the new speed, we obtain the mass of the object. In this case, the mass of the object is approximately 0.457 kg.

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Answer:

Net force = 15 N

Explanation:

Given that,

Applied force on an object = 20 N

Frictional force = 5 N

We need to find the net force acting on the object.

Friction is an opposing force. It acts in the opposite direction.

Net force = Applied force - Frictional force

= 20 N - 5 N

= 15 N

Hence, the net force acting on the object is 15 N.

Answer:

I think its B

Explanation:

Answer:

The time taken to drive on this high way is 6.48 hours

Explanation:

Given;

average velocity, v = 24 m/s

distance of travel, d = 560 km = 560,000 m

The distance traveled is given by;

\(d = (\frac{v+u}{2} )t\\\\d =( 24 \ m/s)t\\\\t = \frac{d}{24} \\\\t = \frac{560,000}{24}\\\\t = 2333.33 \ s = 6.48 \ hrs\)

Therefore, the time taken to drive on this high way is 6.48 hours

If the acceleration of the cart is constant, the graph would be a straight line parallel to the x-axis. The slope of the line would be the constant acceleration. The graph would start at x = 0 m with an acceleration value equal to the constant acceleration and continue with the same acceleration value until x = 12 m.

Such a graph would show that the acceleration of the cart does not depend on its displacement, and it remains constant throughout its motion. This could occur, for example, if the cart is being pulled with a constant force, or if it is sliding down a frictionless surface.

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Answer:

Time Travel Machine

Explanation:

The Hubble Space Telescope can look at galaxies that are many light years away. If it captured an image of a star that was 5 light years away, then that means it took light 5 years to reach the lens of the telescope. So, the image we see is what that star looked like 5 years ago. In other words, it is a glimpse of the past.

Answer:

Cyberpunk has worst Physics

Answer: how long it took.

Explanation: i know nothing is really instant, but its ridiculous that it took over 1.6 million years for the temperature to drop to a thousand degrees after the big bang expansion. and then even after that, it took millions of years to make the first one. regardless, it is still incredible.

Answer:A

Explanation:

Isotopes are members of a family of an element that all have the same number of protons but different numbers of neutrons. The number of protons in a nucleus determines the element's atomic number on the Periodic Table.

Hooke's Law can be given as follows sometimes:

The restoring force of a spring is equal to the spring constant multiplied by the displacement from its normal position:

F = -kx

Where, F = Restoring force of a spring (Newtons, N)

k = Spring constant (N/m)

x = Displacement of the spring (m)

The negative sign relates to the direction of the applied force and by convention, the minus or negative sign is present in F = -kx. The restoring force F is directly proportional to the displacement (x), according to Hooke's law. When the spring is compressed, the displacement (x) is negative. It is zero when the spring is at its original length and positive when the spring is extended.

Practically, Hooke's Law is applicable only within a limited frame of reference, and through experimenting, this statement proves to be true. Because materials cannot be compressed beyond a certain size or expanded beyond a certain size without some permanent deformation or change of their original state.

The law only applies under some conditions such as a limited amount of force or deformation. Factually, many materials will noticeably deviate from Hooke's law even before those elastic limits are reached.

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Answer:

heat is the total energy of the motion of the molecules inside the object or particle, whereas Temperature is merely a measure of this energy. The relationship could be, the more heated an object is there higher the temperature the object will have.

Explanation:

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Answer:

The power delivered by the battery is 17.04 W

Explanation:

Power through a circuit is given as

P = IV    ....1

where P is the power

I is the current through the circuit

V is the voltage through the circuit

The voltage in a circuit is given as

V = IR    ....2

Let us take the value of each resistor as equal to R

when connected in series, the total resistance will be

\(R_{t}\) = R + R = 2R

If we assume constant voltage through the circuit, then from equation 2, the current in this case is

I = V/2R

If the resistors are connected in parallel, then the total resistance will be

\(\frac{1}{R_{t} }\) = \(\frac{1}{R}\) +

\(R_{t}\) = R/2

The current in this case will be increased since the resistance is reduced

I = 2V/R

comparing the two situations, we can see that the current increased when connected in parallel to a ratio of

\(\frac{2V}{R}\) ÷  \(\frac{V}{2R}\) =  

This means that the current increased 4 times

From equation 1, we can see that electrical power is proportional to the current at a constant voltage, therefore, the power will also increase by four times to

P = 4 x 4.26 = 17.04 W

The vector sum of these two forces is the net force on q2:\(-7.75 * 10^{-5} N\)

The net force on particle q2 is the vector sum of the forces due to the other two particles. Since the charges all have the same sign, the force will be repulsive.According to Coulomb's law, the force's strength can be calculated:

\(F =\frac{ (k*q1*q2)}{d^{2}}\)

where d is the distance between the charges, q1 and q2 are the magnitudes of the charges, and k is the electrostatic constant (\(8.99 * 10^{9 }Nm2/C2\)).

For q1 and q2, the force is:

\(F1 =\frac{ (8.99 *10^9 Nm^2/C^2)(9.33 uC)(4.22 uC) }{ (0.180 m)^2}\)

\(F1 = 3.31 * 10^-5 N\)

For q2 and q3, the force is:

\(F2 =\frac{ (8.99 * 10^9 Nm^2/C^2)(4.22 uC)(-8.42 uC) }{ (0.230 m)^2}\\F2 = -1.08 * 10^{-4} N\)

These two forces' vector sum represents the net force acting on q2:

Fnet = F1 + F2 = \(3.31 * 10^{-5} N - 1.08 * 10^{-4} N\)

Fnet =\(-7.75 * 10^{-5} N\)

Therefore,The net force on q2 is the vector sum of these two forces: \(-7.75 * 10^{-5} N\)

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Answer:800 Joules

Explanation: Energy = Power × Time = 100∗8100∗8 = 800 joules

When reading the simile "Bolt runs as fast as lightning," the most appropriate visual interpretation would be that "Bolt runs very fast."

This simile compares Bolt's speed to that of lightning, which is known for its incredible swiftness. The intention is to emphasize Bolt's exceptional speed by equating it to the rapid movement of lightning.

While the simile highlights Bolt's remarkable speed, it does not specify the manner in which he runs or the impact of each step. Therefore, the options suggesting Bolt runs in a straight line, in a wavy manner, or that each step produces thunder are not directly implied by the simile itself. These additional details go beyond the comparison of speed and introduce elements that are not explicitly mentioned.

Hence, the most accurate interpretation based solely on the simile is that Bolt runs very fast, comparable to the speed of lightning.

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Answer:

B or D

Explanation:

Each of the five friends needs to pay £12 to cover the cost of their own meals and contribute towards the birthday person's meal. Using mean allows us to distribute the cost equally among the friends, ensuring a fair division of expenses for the meal.

To determine how much each of the five friends needs to pay, we can use the concept of averages (mean) and divide the total cost by the number of people paying.

In this scenario, the total cost of the meal for 6 people is £12 per person. Since the other 5 friends have decided to pay for the birthday person's meal, they will collectively cover the cost of their own meals plus the birthday person's meal.

To calculate the total cost covered by the five friends, we can subtract the cost of one person's meal (since the birthday person's meal is being paid by the group) from the total cost. The cost of one person's meal is £12.

Total cost covered by the five friends = Total cost - Cost of one person's meal

= (£12 x 6) - £12

= £72 - £12

= £60

Now, to find out how much each of the five friends needs to pay, we divide the total cost covered by the five friends (£60) by the number of friends (5).

Amount each friend needs to pay = Total cost covered by the five friends / Number of friends

= £60 / 5

= £12

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Answer:4 m/s

Explanation:

Since focal length cannot be negative for a converging lens, we take the positive value: f ≈ 41 cm Option C

To determine the focal length of the lens, we can use the lens formula, which relates the object distance (u), image distance (v), and focal length (f) of a lens. The lens formula is given by:

1/f = 1/v - 1/u

In this case, the object distance (u) is 25 cm and the image distance (v) is 64 cm. We can substitute these values into the lens formula to solve for the focal length:

1/f = 1/v - 1/u

1/f = 1/64 cm - 1/25 cm

To simplify the equation, we can find a common denominator:

1/f = (25 - 64) / (64 * 25)

1/f = -39 / (64 * 25)

Now, we can invert both sides of the equation to solve for the focal length:

f = (64 * 25) / -39

f ≈ -41.03 cm

Since focal length cannot be negative for a converging lens, we take the positive value:

f ≈ 41 cm

Therefore, the correct answer is option C) 41 cm.

It's important to note that in the lens formula, distances are measured with respect to the lens, with positive values indicating distances on the opposite side of the incident light. The negative value obtained for the focal length indicates that the lens is a converging lens, as expected. Option C

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Explanation:

To determine the force F of interaction between the half ring and the point charge, we can use the principle of superposition, which states that the total force on a point charge due to a collection of other charges is the vector sum of the individual forces that each of those charges would exert on the point charge if it were the only charge present.

First, we need to find the electric field at the center of curvature due to the charged half ring. The electric field at a point on the axis of a uniformly charged ring is given by:

E = kqz / (z^2 + R^2)^(3/2)

where k is Coulomb's constant, q is the linear charge density, z is the distance from the center of the ring to the point on the axis, and R is the radius of the ring.

At the center of curvature of the half ring, z = R, so the electric field is:

E = kq / (2R)

Next, we can use the electric field to find the force on the point charge q:

F = qE

Substituting the given values, we get:

F = (20 x 10^-9 C) x (9 x 10^9 N·m^2/C^2) x (1/20 cm)

F = 9 x 10^-3 N

Therefore, the force of interaction between the half ring and the point charge is 9 x 10^-3 N.

This force can also be interpreted as the force required to hold the point charge at the center of curvature against the electric field due to the charged half ring. It is an attractive force because the point charge is opposite in sign to the charged half ring.

Answer:

5.65N.

Explanation:

Solution Given:

radius of R = 10 cm=10/100=0.1 m

linear density λ = 1 Mikrokulon/m= 10^-6 Coulomb/m

force F=?

q1 = 20nC=20*10^-9 C

we have

Coulomb's law, which states that the force between two charges is proportional to the product of the charges and inversely proportional to the square of the distance between them. Mathematically, this can be expressed as:

F = k*(q1*q2)/r^2

since q1 is located at the center of curvature of the half ring , so the half ring is uniformly charged with a linear density of λ= 1 μC/m.

again

equation becomes.

F=k*(q1*λL)/r^2

Since the half ring is a semicircle,

we have L=πr

F=k*(q1*λ*πr)/r^2

substituting value

F=9 x 10^9 N*m^2/C^2 *(20*10^-9 C* 10^-6 m^3*π*0.1 m)/(0.1m^2)

F=5.65 N

Therefore, the force of interaction between the half ring and the point charge is 5.65N.

Answer: B

Explanation: the energy stored in the bowstring is a result of the elastic nature of the string (k) how far the bow has been stretched (x).

elastic potential energy is the energy stored in any elastic material when stretched.

Answer:

Following are the solution to the given question:

Explanation:

Please find the complete question in the attached file.

The cost after 30 days is 60 dollars. As energy remains constant, the cost per hour over 30 days will be decreased.

\(\to \frac{\$60}{\frac{30 \ days}{24\ hours}} = \$0.08 / kwh.\)

Thus, \(\frac{\$0.08}{\$0.12} = 0.694 \ kW \times 0.694 \ kW \times 1000 = 694 \ W.\)

The electricity used is continuously 694W over 30 days.

If just resistor loads (no reagents) were assumed,

\(\to I = \frac{P}{V}= \frac{694\ W}{120\ V} = 5.78\ A\)

Energy usage reduction percentage = \((\frac{60\ W}{694\ W} \times 100\%)\)

This bulb accounts for \(8.64\%\) of the energy used, hence it saves when you switch it off.

2. The addition property of equality.

Explanation

Step 1

she applied the addition property for inequalities. it states that if an inequality exists, adding or subtracting the same number on both sides does not change the inequality.

so, the answer is

2. The addition property of equality.

The minimum deceleration required to stop the car in 35 meters is 40000 m/s^2.

Deceleration is defined as  the decrease in speed as the body moves away from the starting point.

The minimum deceleration required can be calculated using the equation of motion:

d = v^2 / (2 * a)

where d is the distance, v is the initial velocity, and a is the acceleration.

Rearranging the equation to solve for a:

a = v^2 / (2 * d) = (3500 m/s)^2 / (2 * 35 m) = 40000 m/s^2

In conclusion, , the minimum deceleration required to stop the car in 35 meters is 40000 m/s^2.

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Answer:

where u put it last time or retrace ur steps to where u last put it

Answer:

C

Explanation:

Answer:

The two answers that are likely to be true are:

She will think of the results as an opportunity to find joy.

She will identify areas for self-development in her results.

By setting her mind on growth, Jackie is likely to approach the personality test with a positive and open mindset. This can lead to the following outcomes:

She will think of the results as an opportunity to find joy: Jackie may view the test results as a chance to discover aspects of her personality that bring her joy and satisfaction. She might focus on finding strengths and positive qualities that can contribute to her personal and professional growth.

She will identify areas for self-development in her results: Rather than viewing the test results as fixed labels or limitations, Jackie is likely to see them as valuable feedback for self-improvement. She may actively seek out areas where she can further develop her skills, knowledge, and personality traits to enhance her personal and career growth.

It's important to note that the other options listed in the question (1. She will score high in the areas she chooses to and 2. She will respond based on what's best in her desired career path) are not directly related to having a growth mindset. They suggest a more biased or strategic approach to the test, which may not align with the concept of growth and self-improvement.

Answer:

12m/s

Explanation:

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