If a car travels 10 km north and then 10 km west, what is the MAGNITUDE of
displacement?

The average power developed by the boy during the climb is approximately 29.4 W.

In physics, the amount of energy transferred or converted per unit time is called power.

total height = number of steps x height of each step

total height = 30 x 0.15 m = 4.5 m

Given, time = 60 s

As power = work done / time

work done = force x distance

force = mass x gravity

mass is boy's mass (40 kg) and gravity is acceleration due to gravity (9.81 m/s²).

force = 40 kg x 9.81 m/s² = 392.4 N

The distance that the boy moves is equal to the total height that he has climbed: distance = total height = 4.5 m

work done = force x distance

work done = 392.4 N x 4.5 m = 1765.8 J

power = work done / time

power = 1765.8 J / 60 s

power ≈ 29.4 W

Therefore, the average power developed by the boy during the climb is approximately 29.4 W.

As for the anomalous behavior of water, water has a higher boiling point and melting point as compared to other substances with similar molecular weight. This is due to the strong hydrogen bonding between water molecules, which requires more energy to break the bonds and change the state of water from solid to liquid to gas.

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Force of air and gravitational force are acting on the ball when launched from the slingshot.

When a ball is launched from a slingshot, during its travel force of air as well as gravitational force are acting on the ball because there is air which moves opposite to the motion of a ball whereas the force of gravity attracts the ball downward.

The force of air slows down the motion of the ball while on the other hand, the force of gravity brings the ball to the ground due to attraction. If these two forces are not present then the ball continues its motion forever so we can conclude that force of air and force of gravity are acting on the ball when launched from the slingshot.

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Answer:

Trial 1 is the largest, trial 3 is the smallest

Explanation:

Given:

Trial 1

M₁ = 6·10²² kg

d₁ = 3 500 km = 3.5·10⁶ м

Trial  2

M₂ = 6·10²² kg

d₂ = 7 000 km = 7·10⁶ м

Trial  3

M₃ = 3·10²² kg

d₃ = 7 000 km = 7·10⁶ м

___________

F - ?

Gravitational force:

F₁ = G·m·M₁ / d₁² = m·6.67·10⁻¹¹·6·10²² / (3.5·10⁶)² = 0.37·m  (N)

F₂ = G·m·M₂ / d₂² = m·6.67·10⁻¹¹·6·10²² / (7·10⁶)² = 0.08·m  (N)

F₃ = G·m·M₃ / d₃² = m·6.67·10⁻¹¹·3·10²² / (7·10⁶)² = 0.04·m  (N)

Trial 1 is the largest, trial 3 is the smallest

The sun is Yellow, red, orange, and blue. Therefore option B is correct.

The star is moving toward an observer. Therefore option B is correct.

39. The type of radioactive decay represented by the equation provided Gamma. Therefore option A is correct.

40. The statement is completed correctly by the information which states that the coal in Alberta has a lower carbon content than coal in other parts of Canada, resulting in reduced greenhouse gas emissions.

29. graph B depicts the relationship between gravitational field strength and the mass of the International Space Station orbiting Earth.

30. The correct sequence of colors representing the changing temperature from the surface to the atmosphere of the sun is Yellow, red, orange, and blue. Therefore option B is correct.

1. When a star undergoes a blue shift, it indicates that the star is moving toward an observer. Therefore option B is correct.

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Answer:

733.3Hz

Explanation:

V=fx

where V is velocity of sound wave ; 330m/s

f is frequency of sound wave ; unknown

x is wavelength of sound wave; 0.450m

substituting the values

V=fx

330=0.450f

f=733.3

Answer:

360 degrees is one full rotation starting at zero

it take 2 s  to the flag to rotate once in a full circle  with 3 rad/s of angular velocity.

Angular velocity is "rate of change of angular displacement with respect to time". i.e. ω= dθ/dt. it is also defined as angular displacement over time. i.e. ω = angular displacement/Time.

Angular velocity shows how much angle can be covered in unit time. It's SI unit rad/s.

Angular acceleration is rate of change of Angular velocity with respect to time.

i.e. α = dω/dt if an object changes its angular velocity in short time, we can say that it has greater angular acceleration. It is expressed in rad/s².

In this problem we have to calculate time, but the angular velocity id not given.

Consider the angular velocity is 3 rad/s.

Given,

Angular displacement θ = 2π

angular velocity ω = 3 rad/s

Time t = ?

Time = θ/ω

Time = 2π/3 rad/s = 2 s

Hence the answer is 2s.

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Answer:

6000 N toward west

Explanation:

F = ma

a = 30-15/10 = 1.5 m/s^2 towards west

m = 4000 kg

F = 4000 x 1.5 = 6000 N towards west

The balance in the allowance for doubtful accounts after recording the bad debt expense would be $11,150.

To calculate the balance in the allowance for doubtful accounts after recording the bad debt expense, we need to determine the amount of the bad debt expense and adjust the allowance accordingly.

Given:

Accounts receivable: $275,000

Estimated uncollectible percentage: 3%

Step 1: Calculate the bad debt expense

Bad debt expense = Accounts receivable * Estimated uncollectible percentage

Bad debt expense = $275,000 * 0.03

Bad debt expense = $8,250

Step 2: Adjust the allowance for doubtful accounts

The current credit balance in the allowance for doubtful accounts is $2,900.

New balance in the allowance for doubtful accounts = Previous balance + Bad debt expense

New balance in the allowance for doubtful accounts = $2,900 + $8,250

New balance in the allowance for doubtful accounts = $11,150

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Answer:

true

Explanation:

this is true, igneous rocks are formed from molten lava when it cools

Answer: True

Explanation:

The life net is used to rescue victims from a high rise building during a fire outbreak.

The life net is a net that is commonly used by fire fighters to catch people as they jump out of a building that is on fire. It is part of the rescue operation of fire fighters. It decreases the momentum change as the person lands.

The following are the statements that describe how this device works to safely allow victims to evade a fire;

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1.30 increases the force you exert on the rope to cause the speed to increase by a factor of 1.70.

What is force?

Force is a push or pull upon an object resulting from the object's interaction with another object. Every force has both magnitude and direction, making it a vector quantity. It is measured in the SI unit of newtons and represented by the symbol F.

The relationship between the force applied to a rope, its mass, and the resulting acceleration is described by Newton's second law of motion.

F = m * a.

If we have an initial force F1 that causes an object of mass m to have an initial acceleration a1, and we increase the force to F2, the new acceleration will be a2. We can use this equation to find the factor by which we need to increase the force in order to cause the speed to increase by a factor of 1.70.

F2 = m * a2

F2 = m * a1 * √(1.70)

F2 = F1 * √(1.70)

So, to increase the speed by a factor of 1.70, you must increase the force you exert on the rope by the square root of 1.70, or about 1.30.

Therefore, 1.30 increases the force you exert on the rope.

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In a Young's double-slit experiment, when one of the two slits is covered by an ultra-thin diamond plate with an index of refraction of 2.417.

The minimum thickness required to produce a dark fringe at the center of the viewing screen is approximately 145.7 nm.

In the double-slit experiment, the interference pattern is formed by the superposition of light waves from the two slits. The condition for a dark fringe at the center of the pattern is that the path difference between the waves from the two slits is equal to an odd multiple of half the wavelength.

To calculate the minimum thickness of the diamond plate, we need to consider the phase shift introduced by the plate. The phase shift is given by δ = 2π(d/λ)(n - 1), where d is the thickness of the plate, λ is the wavelength of light, and n is the index of refraction.

For a dark fringe at the center, the path difference should be an odd multiple of half the wavelength, which means the phase shift should be (2m + 1)π, where m is an integer.

Setting the phase shift equal to (2m + 1)π and solving for the thickness of the plate, we get d = [(2m + 1)λ/(2π)](n - 1).

Substituting the given values of λ = 576.0 nm and n = 2.417, and choosing m = 0 to get the minimum thickness, we find d ≈ (576.0 nm/(2π))(2.417 - 1) ≈ 145.7 nm.

Therefore, the minimum thickness of the diamond plate that produces a dark fringe at the center of the viewing screen is approximately 145.7nm.

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The compressibility of a bone is dependent on its material properties and geometry. If the first bone was compressed by 1.0 mm, the second bone will be compressed by 2.0 mm. Answer is 2.0 mm.

Since the second bone has the same cross-sectional area but twice the length as the first, it has twice the volume. Therefore, it would be expected to compress twice as much as the first bone, or 2.0 mm.
Hi! When considering the compression of a bone, we can use Hooke's Law, which states that the deformation (compression) is directly proportional to the applied force and inversely proportional to the material's stiffness.

For the second bone with twice the length, the same force will cause a greater deformation since the stiffness will be lower. Given that the cross-sectional area is the same, the second bone will be compressed by twice the amount of the first bone.

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The plane travels a distance of 325 miles if the airplane travels for 2.5 hours at an average speed of 130 miles per hour. Using the distance formula (d = rt), we can calculate the distance.

To find the distance traveled by the airplane, we can use the distance formula, which is represented as d = rt. In this formula, "d" represents the distance, "r" represents the rate or speed at which the object is traveling, and "t" represents the time taken for the travel.

Given that the airplane travels for 2.5 hours at an average rate of 130 miles per hour, we can substitute these values into the formula. The rate of the airplane is 130 miles per hour, and the time taken is 2.5 hours.

Using the formula, we can calculate the distance traveled as follows:

d = rt

d = 130 mph × 2.5 hours

Multiplying the rate (130 mph) by the time (2.5 hours) gives us:

d = 325 miles

Therefore, the airplane travels a distance of 325 miles during the 2.5 hours of travel at an average rate of 130 miles per hour.

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Answer: Silicon is better

Hope it helps!!

Answer:

the first on the left goes with the 3rd on the right

second left last right

3rd goes with 1st

4th goes with 5th

5th goes with 4th

and last but not least 6th goes with the second

Explanation:

The parallel line segments are ΔABC ~ ΔAED

Solution:

Parallel line segments: BC/ED

Similar triangles: ΔАВС ~ΔAED

Reason for Similar triangles

In ΔABC and ΔAED, we have

<A= <A (common)

m <ABC = M <AED (Corresponding Angles)

M<ACB = M<ADE (corresponding Angles)

= ΔABC ~ ΔAED

Parallel lines or parallel line segments are always them. They never meet at an equal distance from each other. edge. A table or book is a parallel segment. If a line crosses two sides of a triangle and bisects them equally, the line must be parallel to the third side of the triangle.

Parallel lines are lines that do not intersect or intersect at any point in the plane. They are always parallel and at the same distance from each other. Parallel lines are lines that do not intersect. It can be said that parallel lines meet at infinity. If the slopes are the same and the y-intercepts are different.

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Newton's first and second laws of motion both do, but I think the one you're looking for is: The First Law of Motion.  That description is a little more direct.

It says that if an object is not acted on by a net external force, then it continues in "constant, uniform motion".

Answer: (D.) It does not include object with different masses

Explanation:

It does not include objects with different masses. Therefore, option D is correct.

The force that pulls items toward the center of a planet or other entity is called gravity. All of the planets are kept in orbit around the sun by gravity. A universal, non-contact force, gravity. The gravitational pull of the Earth keeps everything on its surface.

All objects with mass, including our Earth, really bend and curve spacetime, which is what causes gravity to pull you toward the ground. What you experience as gravity is that curvature. If things of different masses are dropped from the same height, they will still impact the ground at the same time because Earth provides everything with the exact same acceleration.

One thing that is wrong about Marcus' experiment is that it does not include objects with different masses. Therefore, option D is correct.

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Since it varies directly with the square of the wire's diameter and inversely with wire length, the conductance of a wire is 0.15 mho.

A wire's electrical resistance varies inversely as the square of its diameter and directly as its length. A wire with a diameter of 1/4 inch and a length of 200 inches has a 20 ohm resistance.

Let L be the wire's length, d its diameter, and C its conductance be the parameters.

Based on the facts provided, we can:

C ∝ d² (conductance varies directly as the square of the diameter)

C ∝ 1/L (conductance varies inversely as the length)

Combining these two proportionalities, we get: C ∝ d²/L

This connection can be used to find a solution to the issue. Using the numbers for the 50 m wire, we can first calculate the proportionality constant as follows:

C = k(d²/L)

0.12 = k(2²/50)

k = 0.12*50/4 = 1.5

So, using this value of k, we can determine the conductance of a 75 m wire with a 2.5 mm diameter:

C = k(d²/L)

C = 1.5*(2.5²/75)

C = 0.15 mho

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Answer:

The final temperature is 35 °C.

Explanation:

Given that,

Mass of the wooden block, m = 0.2 kg

The specific heat of the block, c = 710 J/(kg°C)

Initial temperature, \(T_i=20^{\circ} C\)

Thermal energy, Q = 2130 J

We need to find the block's final temperature. The thermal energy due to change in temperature is given by :

\(Q=mc(T_f-T_i)\\\\T_i\ \text{is initial temperature}\\\\\dfrac{Q}{mc}=(T_f-T_i)\\\\T_f=\dfrac{Q}{mc}+T_i\\\\T_f=\dfrac{2130}{0.2\times 710 }+20\\\\T_f=35^{\circ} C\)

So, the final temperature is 35 °C.

Answer:

B. Crest

Explanation:

The high point of a transverse wave is a called the crest.

Answer:

Explanation:

At first, you have to get the acceleration value from the given data.

\(s=ut+\frac{1}{2}at^{2}\)

s= 45m

u= 0 m/s

t = 6s

a = ?

45 = 0+ 0.5 × a × 6²

45 = 0.5 × 36 × a

45 = 18a

a = 2.5 m/s²

Now, you can use F=ma equation

F = ?

m = 1200kg

a = 2.5 m/s²

F = 1200 × 2.5

F = 3000 N

Answer: 2 i think

Explanation:

Answer:Im pretty sure its the second one because sound sometimes bounces back and that causes echo and it doesnt travel in one line or direction

Explanation:

Jordan's take-off speed is 4.9 ms.

Key Accomplishments Too many to list. See the link below. Bottom line Jordan's incredible 4-foot vertical jump puts the top of his head 6 inches above the edge and the soles of his feet higher than any of his other NBA cleats. rice field. I also ran 4.3 Forty. Don't let anyone tell you that someone was a better athlete than you are. MJ was not only a great goalscorer back then, but he was also a high-flying dunker.

He has only one player in NBA history called his Airness and that is Michael He Jordan. He currently owns his NBA vertical jump of 48 inches, the highest in the entire tournament. That number comes with a hang time on the edge of 0.92 seconds. The 30th-40th percentile is 15-16 inches. Above-average vertical jump, values ​​are in the 60th and 70th percentiles and range from 18 to 19 inches. A good rating is 20-21 inches, which corresponds to the 80-90th percentile.

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Answer:

Yes

Explanation:

Displacement is the distance from the starting point to the end point. If you live and die at the same place, you will have 0m as your displacement.

The correct answer is b. The speed of Halley's Comet increases as it nears the Sun.

This is due to the gravitational pull of the Sun, which accelerates the comet as it gets closer. The fastest point of the comet's orbit is at its closest approach to the Sun, known as perihelion. At this point, the comet can reach speeds of up to 70 km/s. However, as the comet moves away from the Sun, its speed decreases again. The slowest point of the orbit is at its furthest distance from the Sun, known as aphelion. At this point, the comet's speed can drop to around 11 km/s. So, the speed of Halley's Comet is not constant, but varies depending on its position in its elliptical orbit around the Sun.

Halley's Comet follows an elliptical orbit around the Sun, with the Sun located at one of the foci of the ellipse. According to Kepler's laws of planetary motion, a planet or a comet moves faster when it is closer to the Sun and slower when it is farther away. This is because the Sun's gravity is stronger when the comet is closer, and weaker when it is farther away.

Therefore, as Halley's Comet approaches the Sun in its elliptical orbit, it experiences a stronger gravitational pull, which causes its speed to increase. Conversely, as it moves away from the Sun, the gravitational pull weakens, causing its speed to decrease.

Hence, the speed of Halley's Comet is not constant, but varies throughout its orbit, with the highest speed being reached at the closest point to the Sun, known as perihelion, and the lowest speed being reached at the farthest point from the Sun, known as aphelion.

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Answer:

Water droplets could obtain charges thru contact with other drops.

Then if two similar drops (both positively charged) came in contact

charge could be transferred because one side of the drop would be positive and one side of the other would be negative by induction.

Several Physics Labs have built experiments called "Kelvins Thunderstorm"

where objects found in the home could be used to build a charge generator that can generate several thousand volts from falling water droplets.

Lightning usually occurs because of the very large potential that can build

because of charge differences between overhead clouds and the induced charge that will then follow in the ground. Mountain climbers know that it's time to look for safer ground when sparks start to jump from the ropes.

The kinetic energy of an object is half of the product of mass and square of velocity. Then, for a person with a kinetic energy of 1800 J and velocity of 12 m/s is 25 kg.

Kinetic energy of an object is generated by virtue of its motion. It is related to the mass and velocity by the expression as follows:

Ke = 1/2 m v².

Thus, as the mass or velocity increases, kinetic energy increases.

Given velocity of the person = 12 m/s

kinetic energy = 1800 J

1/2 m v² = 1800 J

The mass of the person can be then calculated as follows:

m = 2 Ke/v²

m = 1800 J × 2 / (12 m/s)²

m = 25 Kg.

Therefore, the mass of the person is 25 Kg.

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