1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ierofanga [76]
2 years ago
12

Suppose the radius of the Earth is given to be 6378.01 km. Express the circumference of the Earth in m with 5 significant figure

s.
Round to 5 sig figs with trailing zeros --> 40074000
Physics
1 answer:
bixtya [17]2 years ago
7 0

The mathematical description that fits to find the circumference of a circle (Approximation we will make to the earth considering it Uniform) is,

\phi = 2\pi r

Here,

r = Radius

The radius of the earth is 6378.01 km or 6378010m

Replacing we have that the circumference of the Earth is

\phi = 2\pi (6378010m)

\phi = 40074000 m

\phi = 40074*10^3 m

Therefore the circumference of the Earth in m with 5 significant figures is 40074*10^3 m and using only trailing zeros the answer will be 40074000m

You might be interested in
Which scenarios are examples of physical changes? Select three options
pashok25 [27]

Answer:

A kid becoming an adult

A leg becoming bruised

A person's blood pressure raising because they are running

need a picture to answer specific questions.

Explanation:

All of these are physical changes. Hope that this helps you and have a great day :)

4 0
2 years ago
By what are isotopes identified?
pashok25 [27]
BBBBBBBB!!!!! ATOMIC MASSES :D
4 0
2 years ago
In a local bar, a customer slides an empty beer mug down the counter for a refill. The height of the counter is 1.42 m. The mug
telo118 [61]

Answer:

a) V_{x}=3.72m/s, b) ∠=-54.83°

Explanation:

In order to solve this problem, we must start with a drawing of the situation, this will help us visualize the problem better. (See picture attached).

a)

Now, the idea is that the beer mug has a horizontal speed and no vertical speed at initial conditions. So knowing this, we can start finding the initial velocity of the mug.

In order to do so, we need to find the time it takes for the mug to reach the ground. We can find it by using the following equation:

y=y_{0}+V_{y0}t+\frac{1}{2}a_{y}t^{2}

We can see from the drawing that y and the initial velocity in y are zero, so we can simplify our formula:

0=y_{0}+\frac{1}{2}a_{y}t^{2}

so we can solve for t, so we get:

t=\sqrt{\frac{-(2)y_{0}}{a}}

so now we can substitute the known values, so we get:

t=\sqrt{\frac{-(2)(1.42)}{-9.8}}

which yields:

t=0.538s

So we can use this value to find the velocity in x:

V_{x}=\frac{x}{t}

When substituting we get:

V_{x}=\frac{2m}{0.538s}

which yields:

V_{x}=3.72m/s

b)

In order to solve part b, we need to find the y-component of the velocity, for which we can use the following formula:

\Delta y=\frac{V_{f}^{2}-V_{0}^{2}}{2a}

We know that V_{0} is zero, so we can simplify the expression:

\Delta y=\frac{V_{yf}^{2}}{2a}

So we can solve the equation for V_{yf}^{2} so we get:

V_{yf}=\sqrt{2\Delta y a}

and when substituting the known values we get:

V_{yf}=\sqrt{2(-1.42m)(-9.8m/s^{2})}

which yields:

V_{yf}=-5.28m/s

Once we got the final velocity in y, we can use it together with the velocity in x to find the angle.

So we can use the following formula:

tan \theta =\frac{V_{y}}{V_{x}}

when solving for theta we get:

\theta = tan^{-1}(\frac{V_{y}}{V_{x}})

We can substitute so we get:

\theta = tan^{-1}(\frac{-5.28m/s}{3.72m/s})

which yields:

\theta = -54.83^{o}

7 0
3 years ago
State two factors that affect the type of Shadows formed ​
Vadim26 [7]

Answer:

The two factors that affect the type of Shadows formed are stated below ::

  1. The distance between the source of land and the object.
  2. The angel where the ray of light falls on the object.
7 0
2 years ago
Read 2 more answers
PLASES HELP ASAP
Alja [10]

Answer:

B.

Explanation:

I'm not sure if it's the right answer but I think it is. I hope I helped out in some way.

5 0
3 years ago
Other questions:
  • A velocity selector can be used to measure the speed of a charged particle. A beam of particles is directed along the axis of th
    11·1 answer
  • An object with a mass of 70 kilograms is supported at a height 8 meters above the ground. What's the potential energy of the obj
    14·1 answer
  • In a physics experiment, a ball is released from rest, and it falls toward the ground. The timer was not paying attention but es
    9·1 answer
  • Which electromagnetic wave would have a wavelength approximately the size of the tip of a pencil?
    7·1 answer
  • If two oscillators connected to speakers create frequencies of 594 hz and 600 hz, what is the beat frequency when you hear both
    8·1 answer
  • A tensile test specimen has a gage length = 50 mm and its cross-sectional area = 100 mm2. The specimen yields at 48,000 N, and t
    13·1 answer
  • Ali is sitting on the chair, identify the forces acting on him.
    10·2 answers
  • ANSWER THIS FOR BRAINY CROWN B) ITS SO EASY!
    5·2 answers
  • What element conducts heat and electricity:
    6·2 answers
  • A weightlifter raises a 180-kg barbell to a height of 1.95 m. How much work is done by the weightlifter in lifting the barbells
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!