if you pine cones are falling from a pine tree both pine cones are falling at the same speed if Pinecone one weighs less than pine cone to which pine cone has more kinetic energy​

The closest distance and angle to this question are 1540.35 kilometers and 38.4 ° S. (depending on how you rounded).

There is a common misconception that distance & displacement are simply two different terms for the same thing. But separation separates the concepts of distance and displacement. The total distance covered by an object is always larger than the movement between those two sites, even if it changes direction throughout the course of its voyage.

The smallest (straight line) length between a body's starting position and its final location—represented by an arrow pointing from starting spot to final position—is referred to as a brain's displacement when it moves through one position to another.

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Answer:

An ice cube has a mass of 64 g and is initially at a temperature of 0°C . The ice cube is heated until 56.6 g has become water at 100°C and 7.4 g has become steam at 100°C. How much energy (in kJ) was transferred to the ice cube to accomplish the transformation?

Answer:

0.298

Explanation:

Work equals change in energy.  So the work done by friction equals the final kinetic energy minus the initial potential energy.

W = ΔE

Fd = ½ mv² − mgh

Nμ (-d) = 46.0 J − (25 N) (3.30 m)

-Nμ d = -36.5 J

Using a free body diagram, the normal force is:

N = mg cos θ

N = (25 N) (4.90 m / d)

N = 122.5 J / d

Nd = 122.5 J

Therefore:

-(122.5 J) μ = -36.5 J

μ = 0.298

Answer:

Refraction

Explanation:

because the pencil looks magnified or distorted in water

Answer:

(B) Refraction

Explanation:

the fact or phenomenon of light being deflected in passing obliquely through the interface between one medium and another or through a medium of varying density.

In physics, refraction is the redirection of a wave as it passes from one medium to another. The redirection can be caused by the wave's change in speed or by a change in the medium.

Hope this helps!! :) (Also there is an example attached :D)

Explanation:

Find the time it takes to hit the  bottom....then multiply this time by the horizontal velocity .......

Time to hit bottom :

       d = 1/2 at^2

        9 m  = 1/2 (9.81 m/s^2) (t^2)    shows  t = 1.35 s

Now the horizontal displacement is

      x = rate * time = 24.40 m/s * 1.35 s = 33.1 m

Nuclear fusion reaction is mainly responsible for the cause of energy radiation from the sun.

Solar energy is created due to this nuclear fusion. The discharge of energy in the sun is 10²⁶ joules per second

There is nuclear fusion of hydrogen into helium molecules.

Takes place in solar nucleus/plasma, because this reaction can occur only in high temperature.

The special type of fusion that take place in sun is proton-proton fusion.

This kind of fusion is responsible for the cause of energy radiance and is a very efficient method of producing energy.

The 2 condition which help H-H atoms come together is large mass of the sun and the force of gravity.

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Answer:

When a social position is accompanied by accepted patterns of behavior, it becomes a role. A role is a set of expectations and behaviors that are associated with a particular social position. For example, a doctor's role includes expectations such as providing medical care to patients, making diagnoses, and prescribing treatments. Similarly, a teacher's role includes expectations such as instructing students, grading assignments, and providing feedback on student progress. Roles are important in society because they help to create order and stability, and they allow individuals to understand their place in society and how they are expected to behave.

Answer:

c

Explanation:

Answer:

c

Explanation:

im smart

Answer:

Explanation:

θ = arctan(56.0/76.0) = 36.4° West of North

average velocity is √(56.0² + 76.0²) / (8 + 5) = 94.4/13 = 7.26 m/s

Answer:

East

Explanation:

Electric fields point in the direction of decreasing potential. If there is only one negative charge, the most negative spot would be directly where the charge is. If we measure the electric field to its west, the field would be pointing to the charge, which is to that point's east.

At a position directly west of a negative charge, the electric field point towards the east. So, option C.

The electric force exerted per charge at a given place in space is known as the electric field E.

Charged particles can interact with one another, that means they attract or repel each other even when they are not in contact.  

Electric fields are referred to as being produced by charged particles.  Also used as electric field probes are charged particles.  Charged particles are pulled by an electric field.  

A charged particle's ability to exert an electric force per unit positive charge on another charged particle at a point is determined by the strength of the electric field E that particle produces there.  

An electric field exerts a force on a positive charge in a particular direction. The electrostatic force acting on an object having charge q is given by,

F = qE

Hence,

At a position directly west of a negative charge, the electric field point towards the east. So, option C.

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Answer:

It's dimension is (d) [M L-1 T-1]

Answer:

Explanation:

The acceleration of an electron in an electric field is given by the equation:

a = qE/m

where a is the acceleration, q is the charge of the electron, E is the electric field, and m is the mass of the electron.

Given that the acceleration of the electron is 4.3 m/s^2, and the mass of the electron is 9.11 × 10^-31 kg, and the charge of the electron is -1.6 × 10^-19 C, we can solve for the electric field E:

E = ma/q

E = (4.3 m/s^2) × (9.11 × 10^-31 kg) / (-1.6 × 10^-19 C)

E = -2.44 × 10^4 N/C

The negative sign indicates that the direction of the electric field is opposite to the direction of the electron's motion. Therefore, the magnitude of the electric field required to accelerate an electron with an acceleration of 4.3 m/s^2 is 2.44 × 10^4 N/C and the direction is opposite to the direction of motion of the electron.

The final velocity of the boy after the collision with snowball is 4.84 m/s at 18.4⁰ north-east

The given parameters;

The initial momentum of the boy is calculated as follows;

\(P_y = m_1 u_1\\\\P_y = 25 \times 5\\\\P_y = 125 \ kgm/s \ \ north\)

The initial momentum of the snowball is calculated as follows;

\(P_x = m_2 u_2\\\\P_x = 1 \times 15 \ \\\\P_x = 15 \ kgm/s \ \ west\)

The resultant momentum of the boy and the snowball after collision is calculate as follows;

\(P_f = \sqrt{P_y^2 + P_x^2} \\\\P_f = \sqrt{125^2 + 15^2} \\\\P_f = 125 .9 \ kgm/s\)

The final velocity of the system boy-snowball system is calculated as;

\(v_f(m_1 + m_2)= P_f\\\\v_f = \frac{P_f}{m_1 + m_2} \\\\v_f = \frac{125.9}{25 + 1} \\\\v_f = 4.84 \ m/s\)

The direction of the boy after the collision is calculated as follows;

\(\theta = tan^{-1}(\frac{v_y}{v_x} )\\\\\theta = tan^{-1} (\frac{5}{15} )\\\\\theta = 18.4 \ ^0\)

Thus, the final velocity of the boy after the collision with snowball is 4.84 m/s at 18.4⁰ north-east

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Several Kilometres below the earth at Sea level

.

zero

Explanation:

Work W is defined as

W = F•d = Fdcos(theta)

and it is a dot product of the force and displacement and theta is angle between F and d Since the force is perpendicular to d, angle is 90° thus cos90 = 0. Hence work is zero.

Answer:

PE = 137.2931 J

Explanation:

PE = 137.2931 J

The emf induced in a rotating loop in the greatest uniform magnetic field when the normal to the plane of the loop makes an angle with the field of 0 (zero).

Induction electromotive force (abbreviated as induction emf) is an electromotive force that arises in the coil caused by a changing magnetic field with a fast tempo. This force includes a certain amount of magnetic flux.

Factors that affect the magnitude of the induced emf are:

The figure shows that the angle of rotation in the normal plane is 0 degrees. The induced emf strength is maximum only when the plane normal to the coil makes 90 or 270 degrees with the magnetic field as shown in the figure below.

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An incident light beam is reflected back along the same direction when it strikes a flat mirror's surface ordinarily. This is because since there is no angle of incidence, there will also be no angle of reflection.

The incident ray, the reflected ray, and the transmitted (refracted) ray will all follow the same path if the ray is perpendicular to the surface (i.e they are collinear). The ray seems to be bent at the surface if it is not perpendicular to the surface.

The angle of incidence is 0 since the beam impacts the mirror perpendicular to its surface (from the normal).

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Answer:

D

Explanation:

Have a great day ;)

There are 3 forces acting on the stoplight:

• its weight W, with magnitude W = 100 N, pointing directly downward

• two tension forces T₁ and T₂ with equal magnitude T₁ = T₂ = T = 1000 N, both making an angle of θ with the horizontal, but one points left and the other points right

The stoplight is in equilibrium, so by Newton's second law, the net vertical force acting on it is 0, such that

∑ F = T₁ sin(θ) + T₂ sin(180° - θ) - W = 0

We have sin(180° - θ) = sin(θ) for all θ, so the above reduces to

2T sin(θ) = W

2 (1000 N) sin(θ) = 100 N

sin(θ) = 0.05

θ ≈ 2.87°

If y is the vertical distance between the stoplight and the ground, then

tan(θ) = (15 m - y) / (100 m)

Solve for y :

tan(2.87°) = (15 m - y) / (100 m)

y = 15 m - (100 m) tan(2.87°)

y ≈ 9.99 m

Answer:

a)   F = 3.3 10⁴ N,  b)  F = 2.2 10³ N,  c) force when rigid is 15 times greater than when bending the knees

Explanation:

For this exercise we can use the relationship between work and the variation of kinetic energy

          K₀ = ½ m v²

the final kinetic energy is zero because the person is stationary

          W = (∑ F) x

          W = W x - F w

the weight is in the same direction of the displacement therefore the work is positive and the force applied, by the floor, is in the opposite direction to the displacement, consequently the work is negative

we substitute

          ( W-  F ) x = 0-K₀

           F = W + K₀ /x  

          F = mg + \(\frac{1}{2} \frac{mv^2 }{2x}\)  

          F = m ( g+  \(\frac{v^2 }{2x }\)  )

Let's use kinematics to find the velocity of the person when reaching the floor

           v² = v₀² - 2g (y + y₀)

the initial velocity is true and when reaching the ground y = 0

          v² = -2 g (0-yo)

we calculate

          v = \(\sqrt{2 ] 9.8 \ 0.800}\)

          v = - 3.96  m/s

the direction of this velocity is vertical down

let's calculate

a) x = 1.50 cm = 0.0150 m

           F = 62.0 (3.96² / 2 0.0150 + 9.8)

           F = 3.3 10⁴ N

b) x = 30 cm = 0.30 m

           F = 62.0 (3.96² / 2 0.30 + 9.8)

           F = 2.2 10³ N

c) to compare the force let's look for the relationship between the two

           \(\frac{F_{rigid} }{ F_{flexible} }\) = 3.3 10⁴ / 2.2 10³

           \frac{F_{rigid}  }{ F_{flexible} } = 15

therefore see that the force when rigid is 15 times greater than when bending the knees

With the use of formulas, the capacitance is 33500000000 nF and the charge is 301.5 Coulombs

Capacitance of a Capacitor can be defined as charge to potential difference ratio.

Given that a parallel plate capacitor having plates of area 1.3 cm2 that are separated by 0.026 mm of neoprene rubber with the assumption that the rubber has a dielectric constant κ = 6.7.

The capacitance C = kA/d where

Substitute all the parameters into the formula

C = (6.7 × 0.00013)/0.000026

C = 33.5 Farad

The charge, in coulombs when 9.00 V is applied across it will be

Q = CV

Q = 33.5 × 9

Q = 301.5 Coulombs

Therefore, the capacitance in nanofarads is 33500000000 nF and the charge, in coulombs when 9.00 V is applied across it is 301.5 Coulombs

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Answer:a car with 1,000kg

Explanation: A car with a mass of 1,000kg has more inertia than 150 kg

Out of the two objects a 1000-kilogram car and a 150-kilogram golf cart, the 1000-kilogram cart will have more inertia as the inertia of any object is directly proportional to its mass.

According to Newton's first law, until pushed to alter its condition by the intervention of an external force, every object will continue to be at rest or in uniform motion along a single direction.

The larger the mass of the object, the greater would be the inertia of the object.

Thus, a 1000-kilogram automobile will have higher inertia than a 150-kilogram golf cart since any object's inertia is directly proportionate to its mass.

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Answer:

Explanation:

40 km/h

One of the conclusion about the history of sports that can be drawn from the movie "Champions" is that sports have a long and rich history that is intertwined with the history of human civilization.

From the ancient Olympic Games to the modern-day Olympics, sports have been a way for people to come together and compete in a spirit of sportsmanship and competition. Sports have also been a way for people to express themselves, to build community, and to achieve personal goals.

The movie "Champions" tells the story of a group of young men who come together to form a football team. The team is made up of boys from different backgrounds and with different abilities. However, they are all united by their love of football and their desire to win.

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The length of wire whose resistivity is 3 x 10^-6ohm, and radius is 0.2 mm, with a given value of 15.552 resistance is 6.5268 m.

Given data: r = 0.2 mm = 0.2 x 10^-3m Resistivity = 3 x 10^-6 ohm R = 15.552 ohm

Formula Used: Resistivity (ρ) = (RA)/L

Where, R is resistance, A is the area of cross-section, L is the length of the wire.

Resistance (R) = ρ (L/A)

Multiplying A on both sides, we get

Resistance (R) x A = ρ L ... equation (1)

Area of the cross-section of a wire of radius (r) is given by, A = πr^2

where, π is a constant whose value is 3.14

Substituting the given values, we get

A = πr^2= π (0.2 x 10^-3m)^2= 1.2566 x 10^-7 m^2

Substituting the values of R, A and ρ in equation (1), we get

Length of wire (L) = (Resistance x Area) / Resistivity= (15.552 ohm x 1.2566 x 10^-7 m^2) / (3 x 10^-6 ohm)= 6.5268 m

Therefore, the length of wire whose resistivity is 3 x 10^-6ohm, and radius is 0.2 mm, with a given value of 15.552 resistance is 6.5268 m.

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Answer:

heat given , nature of body, and temperature rise

The pitching of a 70 mph curveball and a 100 mph fastball can be most closely connected to Newton's Laws of Motion, specifically the first law, which is also known as the law of inertia.

According to Newton's first law, an object at rest will stay at rest, and an object in motion will continue in motion with the same velocity and in the same direction unless acted upon by an unbalanced force. In the case of the pitcher throwing the curve ball and fastball, the ball initially starts at rest in the pitcher's hand, and the pitcher then applies a force to the ball, accelerating it to the desired velocity. Once the ball is in motion, it will continue to move at a constant velocity unless acted upon by external forces, such as gravity or air resistance.

The curveball and fastball also demonstrate the third law of motion, which states that for every action, there is an equal and opposite reaction. When the pitcher throws the ball, the force he applies to the ball generates an equal and opposite force on the pitcher's arm. This reaction force is what propels the ball forward and enables it to travel at high speeds.

Therefore, the pitching of a 70 mph curveball and a 100 mph fastball can be most closely connected to Newton's Laws of Motion, specifically the First and Third laws.

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Answer:

276 N and 225 N

Explanation:

Draw a free body diagram.  There are three forces on the hoist:

Weight force 350 N pulling down,

Tension force T₁ pulling up and left 50° from the horizontal,

Tension force T₂ pulling up and right 38° from the horizontal.

Sum of forces in the x direction:

∑F = ma

T₂ cos 38° − T₁ cos 50° = 0

T₂ cos 38° = T₁ cos 50°

T₂ = T₁ cos 50° / cos 38°

Sum of forces in the y direction:

∑F = ma

T₂ sin 38° + T₁ sin 50° − 350 = 0

T₂ sin 38° + T₁ sin 50° = 350

Substitute:

(T₁ cos 50° / cos 38°) sin 38° + T₁ sin 50° = 350

T₁ cos 50° tan 38° + T₁ sin 50° = 350

T₁ (cos 50° tan 38° + sin 50°) = 350

T₁ = 350 / (cos 50° tan 38° + sin 50°)

T₁ = 276 N

T₂ = T₁ cos 50° / cos 38°

T₂ = 225 N