How long does it take a person to skate the width of a hockey rink (85 feet) at
a constant speed of 15 feet per second?
O A. 8.8 seconds
O
B. 4.3 seconds
O C. 6.5 seconds
O D. 5.7 seconds

Answer:

0.1 mm

Explanation:

Given data :  A stack of paper contains 500 sheets of paper.

The stack has dimensions of 0.297 m x 21.0 cm x

50.0 mm.

To Find : What is the thickness of one sheet of paper

So,

1 m = 1000 mm

1 m = 100 cm

1 cm =  10 mm

The stack has dimensions of 0.297 m x 21.0 cm x 50.0 mm.

0.297 m = 297 mm

21 cm = 210 m

297 mm * 210 mm are paper length width

Hence 50 mm is thickness of 500 sheets

-  thickness of one sheet of paper = 50/500  = 1/10 mm

= 0.1 mm

Hope It Helps :)

The thickness of one sheet of paper would be 62.37 ×10⁻⁶ meters.

The volume of the stack of paper in cm³ would be  0.031185 mm³.

Finding the product of two or more numbers in mathematics is done by multiplying the numbers. It is one of the fundamental operations in mathematics that we perform on a daily basis.

As given in the problem a stack of paper contains 500 sheets of paper. The stack has dimensions of 0.297 m x 21.0 cm x 50.0 mm.

The volume of the stack  =  0.297 m x 21.0 cm x 50.0 mm

                                          = 0.000297 mm×2.1 mm x 50.0 mm

the thickness of one sheet of paper = 0.000297 mm×2.1 mm x 50.0/500mm

                                                           =62.37 ×10⁻⁶ meters

The volume of the stack of paper = 31.185 cm³

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A law is created using a theory

Explanation:

the formula for momentum is denoted by p=mv where p is momentum, m is mass and v is velocity. thus, the velocity before impact would be 0.060 x 30 = 1.8 kg/ms

the second one would just be 0.060 x 20 0.72kg/ms

I'm not 100 percent sure this is correct but yeah

The branch of physics that defines motion with respect to space and time, ignoring the cause of that motion, is known as kinematics. Kinematic equations are a set of equations that can derive an unknown aspect of the motion of a body if the other aspects are provided.

Explanation:

Here,

initial velocity(u)=25m/s

final velocity (v)=0m/s

time taken(t)= 5 second

Now,

Answer:

Sin = Sine

Cos = Cosine

Explanation:

Sin(θ) = Opposite/Hypotenuse

Cos(θ) = Adjacent/Hypotenuse

Answer:

Ideal machines are said to have parts which are weightless , frictionless and strings if any are inextensible. Practical machines have parts which have weights, friction and it causes some loss of work done. So these are the differences between Ideal Machine and Practical Machines.

Answer:

the acceleration of the car is -4.9m/s2.

the direction is opposite to the actual direction, since the acceleration is negative.

Hi, This is the answer...

Theories are constructed after there is numerous data collected during the experiment.

Hope it helps you...Pls mark brainliest if it helps you....(by Benjemin)

The correct answer is B.

Theories are constructed after there is numerous data collected during the experiment.

Theory construction is simply a process of formulating and bringing together different components of theories into a single form that is more meaningful.

These theories are usually supported by evidence (data) gathered from many experiments.

In addition, these theories may answer the basic questions of our universe such as;

Thus, from the given options, only option B matches the above explanations.

"theories are constructed after there is numerous data collected during the experiment"

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Answer:

E

Explanation:

A vector is a physical quantity that has magnitude and direction while a scalar is a physical quantity that has magnitude only

*electric potential is a scalar quantity because it only has magnitude

*electric field and electric force are vector quantities because they have magnitude and direction

Answer:

490 meters

Explanation:

hope this helps!

Hi,

The goal of a theory is to explain natural and physical phenomena.

Hope it helps you...

Pls mark brainliest if it helps you...

(Answered by Benjemin)

We can define theory as:

"A logical-deductive or inductive and organized set of ideas that explain a given phenomenon, where the deductions are based on observations".

With this, we can see that the correct option is "To explain natural and physical phenomena"

Now let's explain this a little bit more.

Here we want to see the goal of a theory.

So, what is the end of a theory?

A theory wants to explain something. Someone sees a phenomenon, and in a need to understand it, uses the information that he/she has to try to explain it. Then he/she proceeds to do experiments to test if the theory is correct.

Concluding, the correct option is:

"To explain natural and physical phenomena"

If you want to learn more, you can read:

https://brainly.com/question/22596849

Answer:

360

Explanation:

just add a 0 when using dm

Answer:

Explanation:

1.5/30 = x/250

x = 12.5 m

Answer:

21.899 m

Explanation:

The explanation here is a little differe because we are starting from rest. So, everyone does physics a little differently, but what I would start with is trying to find the accelaration. I've given the formula, now you are able to plug this into the displacement formula where you Velocity Initial = 0m/s (Since you are starting from rest) and V final = 6.00 m/s...

You just plug numbers into the formula after solving for accelaration and do some simple algebra! I hope this helps! I am attaching a new pdf for visuals! If you can't open it let me know! Also there is a star by accelaration because I didn't know if I spelled it right, sorry!

Answer:

poopybutt pickle juice????? baa?

Explanation:

Given the particle's acceleration is

[tex]\vec a(t) = \left(3\dfrac{\rm m}{\mathrm s^2}\right)\vec\jmath[/tex]

with initial velocity

[tex]\vec v(0) = \left(5\dfrac{\rm m}{\rm s}\right)\,\vec\imath[/tex]

and starting at the origin, so that

[tex]\vec r(0) = \vec 0[/tex]

you can compute the velocity and position functions by applying the fundamental theorem of calculus:

[tex]\vec v(t) = \vec v(0) + \displaystyle \int_0^t \vec a(u)\,\mathrm du[/tex]

[tex]\vec r(t) = \vec r(0) + \displaystyle \int_0^t \vec v(u)\,\mathrm du[/tex]

We have

• velocity at time t :

[tex]\vec v(t) = \left(5\dfrac{\rm m}{\rm s}\right)\,\vec\imath + \displaystyle \int_0^t \left(3\dfrac{\rm m}{\mathrm s^2}\right)\,\vec\jmath\,\mathrm du \\\\ \vec v(t) = \left(5\dfrac{\rm m}{\rm s}\right)\,\vec\imath + \left(3\dfrac{\rm m}{\mathrm s^2}\right)t\,\vec\jmath \\\\ \boxed{\vec v(t) = \left(5\dfrac{\rm m}{\rm s}\right)\,\vec\imath + \left(3\dfrac{\rm m}{\mathrm s^2}\right)t\,\vec\jmath}[/tex]

• position at time t :

[tex]\vec r(t) = \displaystyle \int_0^t \left(\left(5\dfrac{\rm m}{\rm s}\right)\,\vec\imath + \left(3\dfrac{\rm m}{\mathrm s^2}\right)u\,\vec\jmath\right) \,\mathrm du \\\\ \boxed{\vec r(t) = \left(5\dfrac{\rm m}{\rm s}\right)t\,\vec\imath + \frac12 \left(3\frac{\rm m}{\mathrm s^2}\right)t^2\,\vec\jmath}[/tex]

When a car is traveling north, its acceleration vector can point south when it is slowing down.

A vector quantity has both magnitude and direction. The direction of a vector is always shown by the direction to which the arrow points.

If the car is travelling north, the direction of the acceleration vector will continue to point northwards.

However, when the car slows down, the direction of the accelerating vector will now point southwards.

Learn more: https://brainly.com/question/12550364

Answer:

A. 2.36 Newtons

Explanation:

F = GmM/d²

F = 6.673 x 10⁻¹¹(1)(5.98 x 10²⁴) / (1.3 x 10⁷)²

F = 2.36121...

Very poor question design.

  mass of box... 1 significant digit

        distance... 2 significant digits

mass of earth... 3 significant digits

     value of G... 4 significant digits

Answer precision to 3 significant digits is not justifiable

Answer:

[tex]{ \boxed{ \sf{F = Bev}}}[/tex]

Explanation:

F » Force

B » Magnetic flux density

e » magnitude of charge

v » voltage

Hey Mate A same question here answered by me with proper explanation.Kimdly visit the link below for your answer

https://brainly.com/question/24617743?

Answer:

a strong wind.

showing rage.

a large undulating mass of something, typically cloud, smoke, or steam.

profoundly immoral and wicked.

Explanation:

The work-energy theorem explains the idea that the net work - the total work done by all the forces combined - done on an object is equal to the change in the kinetic energy of the object. After the net force is removed (no more work is being done) the object's total energy is altered as a result of the work that was done.

This idea is expressed in the following equation:

is the total work done

is the change in kinetic energy

is the final kinetic energy

is the initial kinetic energy

mark me as brainliest ❤️

Explanation:

By the statement, Efficiency of a machine is 60% it is meant that 'The work output is 60% of the work input'. If you apply 100J of energy for a machine, it will be able to life load of 60 J only

Answer:

A stretched rubber band has potential energy

Answer:

elastic potential energy

Explanation:

Answer:

C

Explanation:

Options A and B are not even pointing in the direction as the vectors in the question so they shouldn't even be considered.

Option C looks like the closes since vectors A and B are pointing in a similar direction (negative x-axis)

The best representation for the resultant vector representing the resultant R=A+B would be option C because the result is represented by the closing side of the triangle, therefore the correct answer would be C.

The quantities that contain the magnitude of the quantities along with the direction are known as the vector quantities.

Examples of vector quantities are displacement, velocity acceleration, force, etc.

As given in the problem we have to find out the resultant vector from the sum of vector A and vector B,

The resultant of the vector can be calculated with the help of the triangle law of the vector addition in which the sum is given by the closing side of the triangle.

Thus, the correct answer is option C.

To learn more about the vector quantity here, refer to the link;

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Answer:

5000 Pa

Explanation:

First collect the data you've been given already and make sure to convert into the right units;

Density = 1 g/cm³ ...... 1000 Kg/ m³

acceleration due to gravity = 10 m/s²

Height = 50 cm......0.5 m

after collecting the data, use the formula to solve

pressure = pgh

= 1000 × 10 × 0.5

= 5000 Pa

hope this helps

Answer:

A

Explanation:

newton's law of universal gravitation states that every point mass in the universe attracts every other point mass with a force that is directly proportional to the product of their masses

Answer:

heroism is great bravery..

hope it helps !

Answer:

D

Explanation:

The motion of an object can be described by its speed, position, and direction so its all of the above