I WILL GIVE BRAINLIST just please help with these problems 3

Answer:

f=m.a 1000*9.8=9800newton

Answer: c because our solar system is called the milky way

Explanation:

Answer:

D. Exothermic, because energy is being absorbed from the surroundings

Explanation:

This is true about the Exothemic reaction due to the fact that, the reaction occurs outside the body. During this reaction, the energy being absorbed from the surrounding environment will hit the body surface thereby creating the coldness due to the heat given out from the body  being minimal.

Answer:

Endothermic, because energy is being absorbed from the surroundings.

Explanation:

Answer:

the pressure exerted on the turf when the player lands on his knee is 240,000 N/m².

Explanation:

Given;

combined weight of the players, F = 2400 N

measurement of the player's knee = 0.1 m by 0.1 m

The area of the player's knee is calculated as;

A = 0.1 m x 0.1 m = 0.01 m²

The pressure exerted on the turf when the player lands on his knee is calculated as;

P = F / A

P = (2400 N) / (0.01 m²)

P = 240,000 N/m²

Therefore, the pressure exerted on the turf when the player lands on his knee is 240,000 N/m².

Answer:

Explanation:

If unit vector towards east is represented by i in the present case ,

initial horizontal velocity of aircraft towards east is 70 m /s . The package dropped by the aircraft will also have same velocity while getting separated from the aircraft . Hence its velocity is represented by the vector ,

v = 70 i .

Its vertical velocity of package at that time will be zero so

v = 70 i + 0 j

= 70 i

Initial Velocity can be defined as the velocity at which the motion starts.

Initial Velocity for the package is [tex]70i[/tex].

Given that an aircraft flying at a steady velocity of 70 m/s eastwards at a height of 800 m.

Here we express the steady velocity as [tex]u\;\rm m/s[/tex]. Distance is expressed by [tex]d\;\rm meter[/tex]. Initial Velocity can be expressed as [tex]v\;\rm m/s[/tex].

Initial velocity can be calculated by the formula given below.

[tex]v\;=\;u\;+\;at[/tex]

In the above formula, [tex]a[/tex] is expressed the acceleration and [tex]t[/tex] is expressed the time of the motion.

For the initial velocity, time [tex]t\;=\;0[/tex] because motion starts in the vertical direction. Let us assume that unit vector can be expressed by [tex]i[/tex] and [tex]j[/tex].

Initial velocity formula in vector form is given below.

[tex]v\;=\;ui\;+\;atj[/tex]

By substituting all the values in the above formula, initial velocity is

[tex]v\;=\;ui\;+\;a\times0j\\v\;=\;ui\\v\;=\;70i[/tex]

So the initial velocity of the package is 70[tex]i[/tex].

For more details about the velocity, follow the link given below.

https://brainly.com/question/862972.

Answer:

please find attached file

Explanation:

The magnitude of the vector is 7.27m .

The magnitude of a vector is the numerical value of the vector. It is represented by the length of the vector.

When a vector is resolved in two components then it is given by formula,

[tex]A = \sqrt{Ax^{2}+Ay^{2} }[/tex]

Here,

[tex]A_{x} = 6.15\\A_{y} = 3.88[/tex]

A = [tex]\sqrt{6.15^{2}+3.88^{2}[/tex]

A = 7.27m

Hence magnitude of the vector is 7.27m .

To know more about vector here

https://brainly.com/question/13322477

#SPJ2

Answer: A

Explanation:

The acceleration of gravity is always 9.8 m/s^2 downwards, even if the velocity is 0 m/s.

Answer:

78j

Explanation:

78.125J to be exact

Answer:

d

Explanation:

i dont really know

Answer:

1842.

Explanation: Blueprints were invented a generation before the Civil War by John Herschel, a chemist, astronomer, and photographer, in 1842.

Answer:

The answer is C.

Explanation:

Let's take a glass of water as an example. Now, shine a flashlight on it. See it bend the light into a rainbow? That is a example of refraction. When the light enters the water, the water actually slows down and changes its direction, causing the light to come out the other side in a different way. Since water is very dense, it can bend the water and make it different.

Answer:

The alkaline battery gets its name because it has an alkaline electrolyte of potassium hydroxide instead of the acidic ammonium chloride or zinc chloride electrolyte of the zinc-carbon batteries. An electrolyte is a substance that produces an electrically conducting solution when dissolved in a polar solvent, such as water. The dissolved electrolyte separates into cations and anions, which disperse uniformly through the solvent. Electrically, such a solution is neutral.Advantages. One of the advantages of alkaline batteries over other primary batteries and rechargeable batteries is that it has higher energy density. It has longer shelf life than batteries with chloride-type electrolyte. It could last to up to seven years unused, losing about five percent of its energy every year.

Explanation:

Answer:

answer is 700 joules

Explanation:

work is equal to force into displacement

W=12.5*56

700 joules

Answer:

The frequency of the phonograph record is 0.2 Hz

Explanation:

The frequency of an object moving in uniform circular motion is the number of completed cycles the object makes in a specified time period

The given parameters of the phonograph record are;

The radius of the record = 0.15 m

The number of times the phonograph record rotates, n = 18 times

The time it takes the phonograph record to rotate the 18 times, t = 90 seconds

The frequency of the phonograph record, f = (The number of times the phonograph record rotates) ÷ (The time it takes the phonograph record to rotate the 18 times)

∴ The frequency of the phonograph record, f = n/t = 18/(90 s) = 0.2 Hz

The frequency of the phonograph record = 0.2 Hz.

Answer:

To predict future climate, scientists use computer programs called climate models to understand how our planet is becoming different. Climate models work like a laboratory in a computer. They allow scientists to study how the unlike factors interact to influence a region's climate.

Now a new evaluation of global climate models used to project Earth's future global average surface temperatures over the past half-century answers that question: most of the models have been reasonably accurate.

Explanation:

I got a 100% on this assignment copy it and put it on your notes then go sentence by sentence copy but dont highlight any "." you will not be able to paste it into the box add the "." after you paste it, it one sentence.

ONE SENTENCE AT A TIME NO ". ' - or :" AT ALL

Answer:

Its either 24 or 27 I'm confident its 24 my explanation is that from estimate it's near the 20s

Answer:

if g on Earth= 9.8m/s²

then g on moon will be 0.38 *9.8=3.7m/s²

Mass of a basketball player is 50kg then the weight will be 50*3.7=186.2N

Newton's second law, kinematics and graphic analysis we can find the results for the questions about the movement of the trine are:

Newton's second law establishes a relationship between the net force, the mass and the acceleration of the body. In the attachment we can see a free body diagram which is a schematic of the forces without the details of the bodies.

               N-W = 0

               fr = ma

where N is the normal, W the weight of the body, fr the friction force, m the mass and a the acceleration

The friction force is a macroscopic representation of the interactions between the two surfaces, it is given by the expression

             fr = μ N

where μ is the coefficient of friction between the two surfaces.

We substitute

             μ mg = m a

             a = μ g

Kinematics study the movement of bodies, looking for relationships between position, speed and acceleration.

             v= v₀ – at t

In this case they give tables and graphs with the values ​​of time and speed, where we can see that the relationship is a straight line that has as equation

            y = ax +b

Where y is the dependent variable, x is the independent variable, a is the slope, and b is the cutoff point.

If we relate the two equations:

          a = mug

          μ = [tex]\frac{a}{g}[/tex]

Using linear regression the slope and cutoff point is:

The man.

The slope is a = -0.8 m/s² and the cut-off point b= 4.86 m/s.

Let's calculate the coefficient of friction.

          μ =  [tex]\frac{0.8}{9.8}[/tex]  

          μ  = 0.082

The child.

The slope is a = -0.98 m/s² and the cut-off point b= 4.72 m/s.

We calculate the coefficient of friction.

          μ  = [tex]\frac{0.98}{9.8}[/tex]  

          μ  = 0.1

The relationship between the two coefficients of friction is

        [tex]\frac{\mu_{man} }{\mu_{boy}} = \frac{0.082}{0.1}[/tex]  

         [tex]\frac{\mu_{man}}{\mu_{boy}} = 0.82[/tex]

The results are very exact since there are values ​​of several points in the route and the graphical analysis gives the best possible value for all the points.

There are some variables not taken into account, one of the most important is friction with the wind and wind speed.

In conclusion using Newton's second law, kinematics and graphic analysis we can find the results for the questions about the movement of the trine are:

Learn more about kinematics and graphical analysis here: brainly.com/question/11579754

Answer:

Applied Force.

Gravitational Force.

Normal Force.

Frictional Force.

Air Resistance Force.

Tension Force.

Spring Force.

Explanation:

:)

Answer:

A car

Explanation:

Answer:

I think its A

Explanation:

Answer:

p₀ = 1.53 10⁴ kgm / s,    p_f = 4.74 10⁴ kg m / s

Explanation:

The moment is defined by

         p = mv

the initial moment is

         p₀ = m v₀

indicate the mass of the car m = 1.58 10³ kg and its initial velocity v₀ = 10 m/s

         p₀ = 1.58 10³   10

         p₀ = 1.53 10⁴ kgm / s

the final moment is

indicate that it increases its speed at v = 30 m/s, in a time of t = 15 s

we look for the moment

         p_f = m v

         p_f = 1.58 10³   30

         p_f = 4.74 10⁴ kg m / s

Answer:

The first option, "The more mass an object has, the greater the gravitational pull. "

Explanation:

Newton's Law of Gravity states that [tex]F_G=\frac{Gm_1m_2}{r^{2}}[/tex], where G is the gravitational constant, [tex]m_1[/tex] and [tex]m_2[/tex] are the masses of the two objects, and r is the distance between the objects' centers. Because the objects' masses are in the fraction's numerator, they are directly proportional to [tex]F_G[/tex], and increasing the mass of one or both objects increases the gravitational pull.

Please have a great day! I hope this helps you understand the question!