Starting from rest at the center of a skating rink, the two skaters shown push off from each other over a time period of 1.2 seconds.
What is the force of the push by the smaller skater?
SEE PICTURE.

Many years before newton wrote this law, of motion stated the same idea as the principal of inertia.

Newton's first law states that if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.

Newton's first law of motion is also called law of inertia because it depends on mass of the object.

Thus, many years before newton wrote this law, of motion stated the same idea as the principal of inertia.

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The required quarts that is equals to 5 pounds of ethanol would be 3 quarts if the density of ethanol is 0.789 g/mL.

Density is the ratio of mass and volume.

density = mass/volume

The density of ethanol is 0.789 g/mL.

Convert pounds to grams

∵ 1 pounds = 453.592 grams

∴ 5 pounds = 2267.96 grams

So the mass of ethanol would be 2267.96 grams

Density Equation

density = mass/volume

Solve for volume.

volume = mass / density

volume = 2267.96 g / (0.789 g/mL)

volume = 2267.96 g / (0.789 g/mL)

volume = 2874.47 mL

Convert milliliters to quarts.

∵ 1 mL = 0.00105669 quarts

⇒ 2874.47 mL × 0.00105669 qt /1 mL

⇒ 3 quarts

Hence, the volume of ethanol would be 3 quarts.

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9[tex]\^{i}[/tex]+8[tex]\^{j}[/tex]/[tex]\sqrt{136}[/tex]

F=(9.00i-8.00j)N

we are now to find the unit vector

according to formula

unit vector = [tex]\frac{vector of F}{Magnitude of F}[/tex]

Now :

vector form of F = 9[tex]\^{i}[/tex]+8[tex]\^{j}[/tex]

magnitude of F =[tex]\sqrt{9^2+8^2}[/tex]

magnitude of F=[tex]\sqrt{136}[/tex]

now put that in formual

unit vector = 9[tex]\^{i}[/tex]+8[tex]\^{j}[/tex]/[tex]\sqrt{136}[/tex]

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The mass of the fighter's arm, given that it can generate 5000 N of force is 5.7 Kg

Force, mass and acceleration are related according to the following formula:

Force = mass × acceleration

With the above formula, we can determine the mass of the figter's arm. This is illustrated below:

Force = mass × acceleration

5000 = mass × 877

Divide both sides by 877

Mass = 5000 / 877

Mass = 5.7 Kg

From the calculation made above, we can conclude that the mass of the fighter's arm is 5.7 Kg

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Answer:

The object is using kinetic energy if it is in motion

Explanation:

Hope this helps and may God bless you<3

Because gravity pulls it towards the ground and makes the distance it can cover in one second decrease. Or you can say Due to symmetry in the motion.

Hope this helps, please give me brainliest if I'm correct. :)

The speed of an object in the air begins to decrease after it is thrown because the force of gravity makes it accelerate in a downward direction.

There are a lot of pushes and pulls in the cosmos. Even if it's just the ground, we are constantly pulling or pushing something. The strong force, the weak force, the electromagnetic force, and the gravitational force are the only truly fundamental forces in physics from which everything else is generated.

Any pair of mass-containing objects will gravitationally pull toward one another. The gravitational force is referred to as attractive because it continually tries to pull masses together rather than push them apart. In truth, you and everything else in the universe is being pulled in different directions. It is known as Newton's Universal Law of Gravitation.

So, when the object is thrown straight up into the air with its initial speed gravity starts acting due to which its speed will slow down after some time, and then it will come back down on the surface.

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Answer:

the answer is c

Explanation:

because its c

The given statement is false. All veterinarians require a license to practice medicine.

The study of animals is called veterinary science. In veterinary medicine, the complete care of animals takes place. All the medicine's complete care and protection are given to the animals.

For veterinary science the medical certificates and training required. Proper training and internships are given to the doctors to treat the animals. Without proper treatment it is not possible to treat animals.

Therefore, The given statement is false. All veterinarians require a license to practice medicine.

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Answer:

Explanation:

Answer:

Explanation:

The amount of time required for the child to push the cart around 13.2 m down the aisle is 4.71 seconds.

As we know the average velocity is the rate of change of position or displacement with respect to the time taken during  which the changes in  displacement were occurring .

Since we know that velocity = distance/time, out from which we can say that,

time = distance / velocity  

As we are provided with  velocity v = 2.8 m/s and distance d =13.2

so , time taken  = d/v

                         = 13.2/ 2.8

                          = 4.71428571429

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Answer:

H = Vav t

Vav = 630 ft / 6 sec = 105 ft/s

Check:

H = Vav * t = 105 ft/sec * 6 sec = 630 ft

The rock from the sling will hit Goliath at the speed of 6m/s and if it didn't hit Goliath then it continues its trajectory and hits ground at the velocity of 14 m/s due to longer surfing in the air by the rock.

Newton gave three laws of motion which can be utilised to find the velocity, acceleration and displacement of a body. These laws are only applicable for constant acceleration.

Given:

Distance of the sling when pulled = 5.75 ft

Angle with the horizontal = 4.43°

Distance from the ground = 4.75 ft

1) In the first case The Rock hits Goliath in mid air.

We have all the values required for calculation of the final velocity of the rock while it hits Goliath we will have to just substitute these values in Newton's first law of motion.

Where,

Initial velocity of the rock 6.89m/s

On substitute this values in Newton's first law of motion we get.

Final velocity = 6.72 + π × 6.98 g -9.8e

Final velocity = 6 m/s

2) If the rock does not hit Goliath then the rock will continue the trajectory for some longer. It is given in the question that the distance between these links and the ground is equal to 4.75 feet.

Adding the progression value in the velocity with which it hits the Goliath.

We get, the velocity of the rock when hits the ground equal to = 14m/s.

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The vertical location of the stone in meters, with respect to the top of the building is 10 m

We'll begin by obtaining the velocity of the stone after 10 s. This is can be obtained as follow:

v = u - gt (Since the stone is going against gravity)

v = 50 - (9.8 × 10)

v = 50 - 98

v = -48 m/s

Now, we can obtain the location (i.e height) of the stone as follow:

v² = u² - 2gh (since the ball is going against gravity)

(-48)² = 50² - (2 × 9.8 × h)

2304 = 2500 - 19.6h

Collect like terms

2304 - 2500 = -19.6h

-196 = -19.6h

Divide both side by -19.6

h = -196 / -19.6

h = 10 m

Thus, the stone is 10 m high from the top of the building

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The correct anser is 0.17 J

Similar to a miniature rechargeable battery, the capacitor is an electric component with the capacity to store energy in the form of electrical charges that produce a potential difference, or static voltage.

C = 2 μF = 2 × 10^-6 F = C_1

V= 12 V

C_2 = 5 μF

The electrostatic energy of capacitor's = 1/2 CV^2 = 1/2 (2 × 10^-6) (12^2)

=1/2 (2 × 10^-6) (144)

= 144 × 10^-6 J

This capacitor has a charge on it,

Q = CV = (2 × 10^-6)(12)

= 24 × 10^-6  

= 2.4 mC

When two capacitors of capacitances C_1 and C_2 are connected in parallel the equivalent capacitance C

= C_1 + C_2

= 2 μF + 5 μF

= 7 μF = 7× 10^-6

The energy of the system = Q^2/2C

= (2.4 × 10^-3)^2 / 2 ( 7× 10^-6 )

= 2.4 × 10^-6 / 2 ( 7× 10^-6 )

= 2.4 / 14

= 0.17 J

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The maximum height that is attained by the ball is 39.4 m.

The maximum height refers to the highest position that a ball reaches when it is thrown up. Now we know that we could be able to obtain this maximum height by the use of the equations of kinematics for the body that is undergoing motion under gravity.

Now we know that;

v^2 = u^2 - 2gh

v = final velocity

u = initial velocity

a = acceleration due to gravity

h = height of the object

Now;

v = 0 m/s at the maximum height thus;

u^2 = 2gh

u^2/2g = h

h = (27.8 m/s)^2/ 2 * 9.8 m/s^2

h = 772.84/19.6

h = 39.4 m

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The voltage produced by the first battery is 0.32 volt greater when compared to the voltage produced by the second battery

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

We can obtain how great the voltage of the first battery is compared to the voltage if the second battery as follow:

How great is the voltage of first = Volatge of first - voltage of second

How great is the voltage of first = 3.12 - 2.8

How great is the voltage of first = 0.32 volt

Thus, the voltage of the first battery is greater than the voltage of the second battery by 0.32 volt

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The acceleration of the car if it arrives at the bottom of the hill is a = 0.204 m/s².

Given data,

time = 7s

speed = 35 m/s

distance = ?

acceleration = ?

To find distance using the formula,

speed = d / t

d = s / t

d = 35 m/s / 7s

d = 5 m

To find acceleration using formula,

d = ut + 1/2at²

So putting the data in this formula we get,

5 = 0 x 7 + 1/2 a 7²

5 = 1/2 a 7²

a = 5 / (1/2 x 49)

a = 5 / 24.5

a = 0.204 m/s²

Any process where the velocity changes is referred to as acceleration. There are only two ways to accelerate: changing your speed or changing your direction, or changing both. This is because velocity is both a speed and a direction.

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The support for the hypothesis lies in the fact that; the percentage of oxygen in the Moon’s outer layers is much higher than that in Earth’s.

The term hypothesis has to do with a claim or an explanation of an observation or a phenomenon. The explanation often seeks to shed more light in order to make the meaning of the phenomenon clearer.

The giant impact hypothesis was one of the theories that were put forward to explain the origins of the moon. We know that the origins of the moon have always been a very important subject of scientific study.

The  giant impact hypothesis holds that the moon was formed from the debris that were collected when an object collided against the earth after it was just formed.

This hypothesis is often backed by the fact that there are still many striking similarities between the earth and the moon. Hence, the percentage of oxygen in the Moon’s outer layers is much higher than that in Earth’s.

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By using the coefficient of linear expansion, the increase in the length of the metal plate is by 0.015m and in the area is by 0.3074[tex]m^2[/tex].

The rate of change in length of a metal per degree change in temperature is known as the coefficient of linear expansion.

Given:

Coefficient of linear expansion, α = 29 x [tex]10^-^6[/tex]/k

Length, L1 = 10m

T1 = 25℃

T2 = 78℃

ΔT = 78 – 25 = 53℃

To find:

Change in length (ΔL) and area (ΔA) of metal plate = ?

Formula:

ΔL = α L1 ΔT

ΔA = A1 2 α ΔT

Calculations:

ΔL = 29 x [tex]10^-^6[/tex] x 10 x 53

ΔL = 0.01537m

ΔA = 100 x 2 x 29 x [tex]10^-^6[/tex] x 53

ΔA = 0.3074[tex]m^2[/tex]

A2 = 100.3074[tex]m^2[/tex]

Result:

The increase in the length and area is by 0.015m and 0.3074[tex]m^2[/tex] respectively.

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D. The toy helicopter is flying forward with a force of 5 N and upward with a force of 5 N".

The net force of an object is the resultant force of the object

The sum of the forces acting on the object is the net force of the object.

sum of the vertical forces = force of gravity + upward force

sum of the vertical forces = - 5N + 10 N = 5 N

sum of the horizontal forces = forward force + force of wind

sum of the horizontal forces = 15 N - 10 N = 5 N

Thus, statement that describes the helicopter's force is "the toy helicopter is flying forward with a force of 5 N and upward with a force of 5 N".

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Elements that are written without numbers in front indicate that the are monoatomic.

Elements are substances which cannot be split into simpler units by ordinary chemical reactions.

The elements are arranges into a table known as the Periodic Table.

The periodic table arranges elements into 7 horizontal periods and 18 vertical groups.

Elements are usually represented with symbols.

Elements that exists as monoatomic substances such as the metals are written with no number in front. These elements are usually metals and noble gases.

For example;

sodium, Na

Magnesium, Mg

Neon, Ne

Argon, Ar.

Elements that exist as diatomic or polyatomic elements are written with number in subscripts in front of them. These elements are usually non-metallic elements that exists as molecules.

For example;

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Filtration is the process. Cheesecloth is a loosen woven cloth is primarily use in the preparation of cheese making and cooking.

the lemon wraps are made of a finely woven fabric that acts as a filter for the garnish, allowing you to squeeze lemon juice onto your plate while preventing unwanted seeds and pulp from coming into contact with your food. It also allows customers to work with citrus fruits without direct contact and can be used to stuff specialty teas, fruit punches, or other beverages with lemon wedges.

These wraps are convenient and effective. Not only is it aesthetically pleasing, but it can be an aesthetically pleasing addition to your diet. Our Yellow Lemon Flat Wraps and Green Ribbons are perfect for restaurants looking to enhance the presentation of their beverages and food.      

The process for separating mixtures is the cook using is filtration using a strainer or a cheese cloth to get the juice.

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Answer:

Messages are sent through a variety of : Messages

Answer:

Upton Sinclair's:The Jungle

Explanation:

The novel portrayed the harsh conditions of immigrants in the United States in industrialized cities.

The change in the speed of a projectile is because the force of gravity only acts in a downward direction.

A projectile motion is a type of motion, in which object thrown or projected into the air, is subject to only the acceleration of gravity as the only force.

A projectile motion is a motion that occurs in a plane. Motion in a plane is also referred to as a motion in two dimensions.

The reference point of a projectile motion will be the origin and the two coordinate axes X and Y.

When an object is thrown upwards, the force of gravity tends to oppose the motion of the object, this causes the speed of the object to decrease and eventually become zero at the maximum height.

As the object begins to descend, the speed starts to increase because force of gravity is acting in the same direction as the object's motion.

Horizontal velocity of a projectile does not change, because force of gravity only acts in a downward direction.

Thus, the change in the speed of a projectile is because the force of gravity only acts in a downward direction.

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The value of A in the linear equations are  0.0484 and 29.87.

a) Part A

y = x/(AB)

A=x/By

A = 3.60/(5.55*13.4)

A = 0.0484

b) Part B

y = Ax + [tex]1/2 Bx^{2}[/tex]

A = ( y -  [tex]1/2 Bx^{2}[/tex])/x

A = 29.87

In a linear equation, there are just one or two variables. A linear equation's rules state that no variable can be divided by a sum greater than one or utilized as the denominator of a fraction. When the values that make a linear equation true are determined and plotted on a coordinate grid, all the points fall on the same line.

The slope, x-intercept, and y-intercept are the components of the standard form, which is written as ax+by+c=0 an x + b y + c = 0.

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6,240,000,000,000,000,000 electrons