pLS ANSWER FAST WILL MARK BRAINLIEST

Answer:

The answer to this question is given below in this explanation sections.

Explanation:

The weight of an object is concentrated at the center of gravity.The term center of gravity is used interchangeably with center of mass.For a symmetrical object the center of mass is located  at the geometric  center of the object.If the object is not symmetric we can determined the center of mass using the mentioned below.

Materials:

Procedure:

conclusion:

             What would happen to the center of gravity of the shape if you were to spin it freely?

center of gravity experiment:

A boy of mass 85 kg is riding a bicycle in a circle with a radius of 7.2 meters, and it takes 6 seconds to make one revolution, then his velocity will be equal to 7.54 m/s.

The movement of an object along the circle's edge which path is always at the tangent to any specific point on the circle is described by tangential velocity.

As a result, tangential velocity is the amount of motion along a circle's edge that may be measured at any given time.

The speed at any location that really is tangent to the rotating wheel is quantified as the tangential velocity in a circular motion. The connection between rotational acceleration and tangential velocity is expressed by the formula. The part of movement along the circle's edge that can be detected at any time is called tangential velocity.

The given data in the question,

Radius, r = 7.2 meters.

Time, t = 6 seconds.

v = 2πr / t

v = 2π(7.2)/6

v = 7.54 m/s.

Therefore, the velocity of the boy is 7.54 m/s.

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Answer:

Newton's first law of motion states that objects state of rest or uniform motion will stay unless acted upon by an external force

Explanation:

Newton's first law of motion is also called the Law of Inertia. Because, it describes the property of inertia of the body. Newton's First Law states that every object continues its state of rest or uniform motion, until or unless it is acted upon by an external force. It means that if an object is in state of rest, it will remain at rest until or unless an external force is not applied to it. Same goes for the state of uniform motion. Hence, the answer will be:

Newton's first law of motion states that objects state of rest or uniform motion will stay unless acted upon by an external force

Answer: Newton's first law of motion states that objects at rest or in motion will stay unless acted upon by a net external force.

Explanation:

Motion is typically described in terms of velocity, acceleration, displacement and time. An object's velocity cannot change unless it is acted upon by a force, as described by Newton's first law also known as inertia. More generally, the term motion signifies any spatial and or temporal change in a physical system.

Many scientists have studied motion and it's properties because of its importance to life. The Italian, Galileo Galile, who lived from 1564 to 1642, did the first systematic study of motion. Also Sir Issac Newton did more detailed work on the study of motion. In his works in motion he came about three different laws.

- Newton's first law: This states that objects at rest or in motion will stay unless acted upon by a net external force.

-- Newton's second law: This states that the force on an object is equal to its mass times its acceleration.

- Newton's third law: This states that for every action there is an equal and opposite reaction.

Answer:

Explanation:

Average velocity is expressed as;

Average velocity = Displacement/Time

Get the displacement

If a pizza delivery car, parked 200 m East of a restaurant and moves to a position 600 m West

The displacement = 600 -200

Displacement = 400m

Time = 18s

Substitute and get the velocity;

Average velocity = 400/18

Average velocity = 22.2m/s

Hence the average velocity of the delivery car in moving to its new position is 22.2m/s

Answers:

The transportation industry is no stranger to the manipulation of everyday physics. Cars and trains utilize the wheel, which provides a smooth, steady motion.

The ears hear sounds which occur through the movement of air molecules, and the chemistry that drives all of biology depends on the physics of energy and molecules. Every day, for example, plants absorb sunlight, water, and carbon dioxide, creating glucose and releasing oxygen as a byproduct.

Brainlist pls!

Answer:

velocity of all electromagnetic waves are

[tex] \huge3 \times {10}^{8} m {s}^{ - 1} [/tex]

So, the ratio is equal to 1.

Answer:

aluminum foil and cotton

Explanation:

It was found that the aluminum foil and cotton were the best insulators for keeping the water cold while the Styrofoam sheets and the bubble wrap were the worst two insulators for keeping the water cold.

Explanation:

The third class lever cannot magnify our force because in third class lever the effort it between the load and the fulcrum. Also, in this type of lever no matter where the force is applied, it is always greater than the force of load. Hence, That type of lever cannot magnify our force.

Answer:

c. long chains of carbon molecules

Answer:

My feet and my fists

Explanation:

My feet help me walk

and my fists help me one punch people

Answer:

The circumference of the bromine atom is 628 pm

Explanation:

The formula for the circumference of a circle is 2πr.

Where π is 3.14 and r is the radius of the circle.

Since atoms have a circular shape. The formula above can be used to determine the circumference of an atom (bromine atom in particular).

circumference of the bromine atom is 2πr (where r is 100 pm)

2 × 3.14 × 100 = 628 pm.

The circumference of the bromine atom is 628 pm

Answer:

A

Explanation:

because newton's second law states that if a resultant force acts on an object then, it will accelerate in the direction of the resultant force

Answer:

#1. decrease

#2. increases

#3. increases

#4.increases

Explanation:

Answer:

The answer for the first question is: 3,000,000 N/m

The answer for the second question is: If the question was, "Which of the following is the best example of kinetic energy being transformed into potential energy?" then the answer is winding the spring on a toy car

Explanation:

For the first question: I have no explanation, I just got it right on my test so I thought i'd help you out.

For the second question: (i'll try to explain the best I can).

Kinetic energy = energy in motion

Potential energy = stored energy

so when winding the spring of a car you are using energy in motion (kinetic energy) to create stored energy (potential energy) that will be used to move the car. So it goes something like:

kinetic energy > potential energy > kinetic energy

Answer:

ttrftyrdy

Explanation:

tytrterte

Explanation:

In Asexual reproduction , part of parent plant is detached and grows to become a complete plant. In this process plant produced is generally identical to the its parent plant. It has ALL the same characteristics that the parent plant has. However, this is not true in case of sexual reproduction of plants.

Answer:

90.44 m

Explanation:

From the question given above, the following data were obtained:

Initial velocity (u) = 30 m/s

Angle of projection (θ) = 40°

Acceleration due to gravity (g) = 9.8 m/s²

Range (R) =?

The range of the ball can be obtained as follow:

R = u² Sine 2θ / g

R = 30² Sine (2×40) / 9.8

R = 900 Sine 80 / 9.8

R = 900 × 0.9848 / 9.8

R = 886.32 / 9.8

R = 90.44 m

Therefore, the range of the tennis ball is 90.44 m

Answer:

B= nimbus clouds

Answer:

B= nimbus clouds

Answer:

fair = 663.15 [N]

Explanation:

To solve this problem we must use Newton's second law, which tells us that the sum of forces on a body is equal to the product of mass by acceleration.

∑F = m*a

where:

∑F = forces applied [N]

m = mass = 1405 [kg]

a = acceleration = 1.77 [m/s²]

In this way, we have two forces, the one that develops the engine to move the car and the resistance force of the air that opposes the movement of the car.

[tex]3150-f_{air}=m*a\\3150-f_{air}=1405*1.77\\f_{air}=3150-2486.85\\f_{air}=663.15[N][/tex]

Answer: m∠P ≈ 46,42°

because using the law of sines in ΔPQR

=> sin 75°/ 4 = sin P/3

so ur friend is wrong due to confusion between edges

+) we have: sin 75°/4 = sin P/3

=> sin P = sin 75°/4 . 3 = (3√6 + 3√2)/16

=> m∠P ≈ 46,42°

Explanation:

Answer:

The basketball player jumped 10 m high.

Explanation:

Vertical Launch Upwards

In a vertical launch upwards, an object is launched vertically up without taking into consideration any kind of friction with the air.

If vo is the initial speed and g is the acceleration of gravity, the maximum height reached by the object is given by:

[tex]\displaystyle h_m=\frac{v_o^2}{2g}[/tex]

The basketball player jumps up with a speed of vo=14 m/s. The maximum height is:

[tex]\displaystyle h_m=\frac{14^2}{2*9.8}[/tex]

[tex]\displaystyle h_m=\frac{196}{19.6}=10[/tex]

The basketball player jumped 10 m high.

Answer:

The final velocity of the object is 45 m/s.

Explanation:

Given;

initial velocity of the object, u = 10 m/s

acceleration of the object, a = 3.5 m/s²

time of motion, t = 10 s

The final velocity of the object is given as;

v = u + at

where;

v is the final velocity of the object

v = 10 + (3.5 x 10)

v = 45 m/s

Therefore, the final velocity of the object is 45 m/s.

Answer:

it's answer is Compound chemical energy

hope it helps you

Answer:

an elastic wave in the earth produced by an earthquake or other means

Explanation:

Answer:

They carry energy

Explanation:

Answer:

Following are the solution to the given question:

Explanation:

Please find the complete question in the attached file.

[tex]a_x = 0\\\\a_y = -g = -9.81\ \ \frac{m}{s^2} \\\\v_{iy} = 0 \\\\y = v_{iy} \times t+ \frac{1}{2ay} \times t^2 \\\\ 15 = \frac{1}{2} \times 9.8 \times t^2 \\\\t = \sqrt{(2 \times \frac{15}{9.8})} \\\\[/tex]

  [tex]= 1.75 \ sec \\\\[/tex]

Distance:

[tex]x = v_{ix} \times t \\\\[/tex]

  [tex]= 8 \times 1.75\\\\= 14 m[/tex]

Using the concept of motion, the answers to the question posed on the motion of a dropped ball are :

The vertical component of acceleration is denoted as [tex]a_{y} [/tex] :

The gravitational force acting on the ball in the downward direction has an acceleration of - 9.8 m/s². Hence,

Gravitational force only acts downwards along the vertical, hence, horizontal component of acceleration will be Zero.

then the vertical component of x, will be 0

The initial vertical velocity ; [tex]V_{iy} is Zero [/tex] :

The time taken :

S = 0.5gt² ; S = distance = 15 meters ; g = - 9.81

15 = 0.5(9.8)t²

15 = 4.9t²

t² = (15 ÷ 4.9)

t² = 3.061

t = √3.061

t = 1.75 seconds

Landing Distance from building :

Horizontal speed × time taken

[tex]V_{ix} \times 1.75 [/tex]

[tex]8 \times 1.75 = 14 meters [/tex]

Therefore, the ball landed 14 meters away from the building.

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Answer:

The height of the hurdler when he clears the hurdle is approximately 1.1045 meters (high)

Explanation:

The given parameters are;

The distance the hurdler is from the hurdle, d = 0.535 m

The velocity with which the hurdler jumps, u = 6.82 m/s

The angle at which the hurdler jumps, θ = 67.9°

The horizontal component of the velocity is uₓ = u × cos(θ)

∴ uₓ = 6.82 × cos(67.9°) ≈ 2.566 m/s

The time it takes, t, the hurdler to get to the hurdle horizontally 0.535 m away is given as follows;

Time, t = Distance/Velocity = d/uₓ = 0.535 m/(2.566 m/s) ≈ 0.2085 s

t ≈ 0.2085 s

The kinematic equation of vertical motion, under gravity can be presented as follows;

h = [tex]u_y[/tex]·t - 1/2·g·t²

Where;

h = The height reached by the hurdler in time t

[tex]u_y[/tex] = The vertical component of the velocity = u × sin(θ)

g = The acceleration due to gravity

∴ [tex]u_y[/tex] = 6.82 m/s × sin(67.9°) ≈ 6.3189 m/s

[tex]u_y[/tex] ≈ 6.3189 m/s

Substituting the known values gives;

h = 6.3189 × 0.2085 - 1/2×9.8×0.2085² ≈ 1.1045 m

The height of the hurdler when he clears the hurdle, h ≈ 1.1045 m.