need help in physices please help

Answer:

The linear speed is approximately 354.88361 m/s

Explanation:

The given parameters are;

The time it takes the Earth to make one complete rotation = 24 hrs.

The distance of the location of the person in North America from the axis, r = 4.88 × 10⁶ m

The rotation per 24 hours = 1 rev/(24 h)

24 hours = 24 hours ×60 minutes/hour × 60 seconds/minute = 86,400 seconds

Therefore, we have, the rotation rate per second, n = 1 rev/(86,400 s)

The angular speed, ω = 2·π·(1 rev/(86,400 s)) ≈ 7.2722052 × 10⁻⁵ rad/s

The linear speed, v = ω × r

Therefore, v ≈ 7.2722052 × 10⁻⁵ rad/s × 4.88 × 10⁶ m = 354.88361 m/s.

The linear speed, v ≈ 354.88361 m/s.

Answer:

the pics upside down fam

Explanation:

Answer:

faster than 100 kph

Explanation:

Time taken to complete the first lap is

[tex]\dfrac{15\ \text{km}}{15\ \text{kph}}=1\ \text{hour}[/tex]

If the person's average speed is to be 30 kph then the complete race would be over in [tex]\dfrac{30}{30}=1\ \text{hour}[/tex]

But 1 hour has passed in the first lap already so, the next 15 km must be covered in 0 time.

So, the speed of the bike must be more than 100 kph.

Answer:

House and Senate.

Explanation:

declares war, regulates interstate and foreign commerce and controls taxing and spending policies.

Answer:

the wheels on a bike

Explanation:

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Answer:

The justification for this scenario has been characterized elsewhere here.

Explanation:

Answer:

60

Explanation:

it's equilateral...all angles are equal...180÷3=60ffs

Each angle of triangle is 60 degree.

What is equilateral triangle ?

If a Triangle having all the three sides of equal length and corresponding angle also to be equal than this triangle is known as equilateral triangle.

By definition of equilateral triangle it is known that all the sides of a triangle are equal and by the angle sum property tells us that a triangle's angles add up to 180. It also tells us that every side of a triangle is the same, and every angle of an equilateral triangle is the same.

Let each angle of triangle be x :

[tex]\begin{aligned} x+x+x&= 180^{o}\\3x&=180^{0}\\x&=60^{o}\end{aligned}[/tex]

Therefore, each angle of triangle is 60 degree.

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Answer:

The volume of a regular object can be calculated by multiplying its length by its width by its height. Since each of those is a linear measurement, we say that units of volume are derived from units of length.

Explanation:

Answer:

length×Width×Height

Explanation:

Length×Width×Height is the formula for volume

Answer:

Population 1 indicates growth while Population 2 indicates a declining population

Explanation:

Here, using the given rate of change of the population, we want to determine which of the two is growing and which is declining

From the rate of change of both, we can determine this. Looking at the differential equation for the first one, we can see that it is of positive value. Looking at the differential equation for the second one. we can see it is of negative value

While a positive change rate indicates growth, a negative change rate will indicate otherwise

Hence, we can conclude that the one with a negative rate change will indicate a declining population

Answer:

Metals

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Answer:Substances

Explanation:

Answer:

[tex]1500 \: \mathrm{N}[/tex]

Explanation:

The equation [tex]F=ma[/tex] represents the force needed.

Plugging in [tex]m=250[/tex] and [tex]a=6\: \mathrm{m/s^2}[/tex], we find that the force needed to accelerate a 250 kg object at a rate of [tex]6 \: \mathrm{m/s^2}[/tex] to be [tex]\fbox{$1500 \: \mathrm{N}$}[/tex].

Answer:

option 2

Explanation:

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Answer:

Geosphere

Explanation:

Answer:

The geosphere may be taken as the collective name for the lithosphere, the hydrosphere, the cryosphere, and the atmosphere.

The lithosphere refers to the land. Land consists of rocks and sand.

Explanation:

Answer:

20.3N

Explanation:

Given parameters:

Area of the eardrum  = 0.0002m²

Pressure on the eardrum  = 1atm  = 101325Nm⁻²

Unknown:

Force exerted on the eardrum  = ?

Solution:

Pressure is the force per unit area impacted on a body.

      Pressure  = [tex]\frac{Force }{area}[/tex]  

  Force  = Pressure x  area

Now insert the parameters and solve;

  Force  =  101325Nm⁻²  x  0.0002m²  = 20.3N

Answer:

Gravity is very important to us. We could not live on Earth without it. The sun's gravity keeps Earth in orbit around it, keeping us at a comfortable distance to enjoy the sun's light and warmth. It holds down our atmosphere and the air we need to breathe.

Answer:

Example:

Astronauts reach a distant planet and find it takes eight times as much force to lift objects there than it does on Earth. What is the acceleration due to gravity on this planet?

On this planet the force of gravity is eight times larger. Since the masses of objects are a fundamental property of those objects, they cannot change, that means the value of ​g​ must be eight times larger as well:

[tex]8F_{grav}=m(8g)8F[/tex]

 [tex]=m(8g)[/tex]

The value of ​g​ on Earth is 9.8 m/s2, so 8 × 9.8 m/s2 = 78.4 m/s2.

Answer:

Explanation:

When a player throws a football , he applies force on the ball , due to which ball accelerates in forward direction . This is the action force .

The ball also applies a force on the hand of the player . Due to it the player experiences a pushing force in backward direction . This is reaction force .

Due to this force , the player does not move in backward direction because of frictional force of the ground . The frictional force keeps him stationary .

Answer:

v = 7 m/s

Explanation:

p = m × v

42 = 6 × v

6v = 42

v = 42/6

v = 7 m/s

Answer:

2ohms resistor

Explanation:

According to ohms law

V= IR

V is the potential difference

I is the current

R is the resistance

Since they have the same potential difference, this shows that they are connected in parallel

Let assume V = 20V

For the 4ohms resistor

I = V/R

I = 20/4

I = 5A

For the two ohms resistor

I = V/R

I = 20/2

I = 10A

This shows that the 2ohms resistor will have the bigger current because the smaller the load, the bigger the current and vice versa

Answer:

2

Explanation:

Answer:

24000kgm/s

Explanation:

Given parameters:

Mass of car  = 1200kg

Velocity = 20m/s

Unknown:

Momentum  = ?

Solution:

Momentum is the amount of motion a body possesses.

   Momentum  = mass x velocity

 Now insert the parameters and solve;

 Momentum  = 1200 x 20  = 24000kgm/s

Answer:

Gravity is an ever present force, and therefore acceleration is guaranteed to happen at every single one of those points (and in fact, everywhere in the universe).

On top of that, friction will be present in all four spots (friction with the rails, with the air, with the axles, etc.), and friction is a perfectly acceptable force that will cause acceleration, slowing the roller coaster down.

So the correct answer is every single point, regardless of what answer the teacher expects.

The object will be moving faster if the acceleration and velocity are pointing in the same direction. The object will also slow down if the acceleration is pointing in the opposite direction as the velocity.

When an object's speed, direction of motion, or both change, it accelerates. Even while it may appear to be virtually immediate in some circumstances, such as when a golf ball is struck by a club or during car collisions, changes in an object's speed are always continuous.

Since gravity is a constant force, acceleration will unavoidably occur at each of those locations and throughout the whole universe.

Therefore, In addition, there will be friction at all four locations—friction with the axles, the air, the rails, etc.—and friction is a completely normal force that will accelerate the roller coaster, slowing it down.

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The projectile is any object thrown into space upon which the only acting force is gravity. In other words, the primary force acting on a projectile is gravity. This doesn’t necessarily mean that the other forces do not act on it, just that their effect is minimal compared to gravity. The path followed by a projectile is known as a trajectory. A baseball batted or thrown and the instant the bullet exits the barrel of a gun are all examples of the projectile.

When a particle is thrown obliquely near the earth’s surface, it moves along a curved path under constant acceleration that is directed towards the center of the earth (we assume that the particle remains close to the surface of the earth). The path of such a particle is called a projectile and the motion is called projectile motion. Air resistance to the motion of the body is to be assumed absent in projectile motion.

In a Projectile Motion, there are two simultaneous independent rectilinear motions:

Along the x-axis: uniform velocity, responsible for the horizontal (forward) motion of the particle.

Along y-axis: uniform acceleration, responsible for the vertical (downwards) motion of the particle.

Accelerations in the horizontal projectile motion and vertical projectile motion of a particle: When a particle is projected in the air with some speed, the only force acting on it during its time in the air is the acceleration due to gravity (g). This acceleration acts vertically downward. There is no acceleration in the horizontal direction, which means that the velocity of the particle in the horizontal direction remains constant.

[tex]\sf~~~~~~~~~~~~~~~{\red{\underbrace{\underline{\green{projectile~motion}}}}}[/tex]

Projectile motion is a form of motion in which object or particle is thrown near earth's surface and it moves along a curved path under the action of gravity only.

Answer:

73.72

Explanation:

For this subtraction problem, the answer or solution is expressed to the least precise of the numbers we are trying to subtract.

The least precise number is the number with the lowest significant numbers:

105.4 - 31.681

105.4  has 4 significant numbers

31.681 has 5 significant numbers

  So;

             105.4  

        -      31.681

        ------------------

                 73.719

          ----------------

The solution is therefore  73.72

For this use the formula:

d = Vo * t - (at^2) / 2

Clearing t:

t = d/(v + 0.5*a)

Replacing:

t = 5 m / (7.2 m/s + 0.5 * (-1.1 m/s²)

Resolving:

t = 5 m / (7.2 m/s + (-0.55 m/s²)

t = 5 m / 6.65 m/s

t = 0.75 s

Result:

The time will be 0.75 seconds.

Answer:

3.15m³

Explanation:

To solve this problem, let us first find the mass of the petrol from the given dimension.

       Mass  = density x volume

Volume of petrol  = 4.2m³

Density of petrol  = 0.3kgm⁻³  

       Mass of petrol  = 4.2 x 0.3  = 1.26kg

So;

      We can now find the volume of the alcohol

 Volume of alcohol = [tex]\frac{mass}{density}[/tex]  

Mass of alcohol  = 1.26kg

Density of alcohol  = 0.4kgm⁻³  

  Volume of alcohol  = [tex]\frac{1.26}{0.4}[/tex]   = 3.15m³

Answer:

The complete sentence is presented as follows;

The area of the land is 2.31 × 10¹⁰ square meters in scientific notation

We can represent this area as 2.31 × 10⁴ square kilometers

Explanation:

The question relates to Laws of indices specifically in powers of 10

The given parameters of the dimensions of the rectangular section of forest land are;

5.5 × 10⁵ meters by 4.2 × 10⁴ meters

Therefore, the area, "A" the rectangular section of forest land is A = 5.5 × 10⁵ m × 4.2 × 10⁴ m = 2.31 × 10¹⁰ m²

1 km² = 1 × 10⁶ m²

∴ 2.31 × 10¹⁰ m² = 2.31 × 10¹⁰/(1 × 10⁶) km² = 2.31 × 10¹⁰ ⁻ ⁶ km² = 2.31 × 10⁴ km²

2.31 × 10¹⁰ m² = 2.31 × 10⁴ km²

Therefore, the complete sentence, can be written as follows;

The area of the land is 2.31 × 10¹⁰ square meters in scientific notation

We can represent this area as 2.31 × 10⁴ square kilometers.

Answer:

The area of the land is 2.31 × 10¹⁰ square meters in scientific notation

We can represent this area as 2.31 × 10⁴ square kilometers

The unit square kilometers is more appropriate to represent the area of the forest land in scientific notation

Explanation:

just did it got it correct

Answer:

vector

direction

Explanation:

Both speed and velocity measures how fast something is moving. Since speed is not a vector, it does not require direction to describe it.

Speed is the distance divided by the time taken. It is a scalar quantity in that it has only magnitude but no direction.

When describing speed, there is no need to specify its direction.

But when describing velocity, we specify both magnitude and direction.