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
Bogdan [553]
3 years ago
5

Will get Brainlest 5 star and heart looking for someone who knows 7 grd science flvs work dm and friend

Physics
1 answer:
Makovka662 [10]3 years ago
3 0
ANSWER:
C

EXPLANTION:
The earths crust is the toppest layer of Earth, so that elimates option A and B.

FUN FACT:
Earth is Mostly Iron, Oxygen and Silicon

I’m so sorry if this is wrong, but I hoped help.
Have a nice day :3
You might be interested in
A box sitting still on the ground by itself has a Normal Force of 700N, what is the mass? (gravity’s acceleration is 9.80 m/s²)
Misha Larkins [42]

Answer:  71.43 kilograms

This value is approximate rounded to two decimal places.

=====================================================

Explanation:

The ground is pushing up with a normal force of 700 N. Because the box is sitting still, this means the force of gravity is pulling the box down with a force of 700N to keep things balanced.

If the force of gravity was greater than 700N, then the box would fall through the ground. If the force of gravity was smaller than 700N, then the box would be accelerated upward. Since neither event is happening, the force of gravity must be equal to the normal force.

Now turn to Newton's second law which says

F = ma

where F is the force, m is the mass and 'a' is the acceleration. We're given the acceleration of gravity is roughly 9.80 m/s^2. So a = 9.80

The force we'll plug in is F = 700. The value of m is unknown, but we can solve for it as such

F = ma

700 = m*9.80

700 = 9.08m

9.80m = 700

m = 700/9.80

m = 71.4285714285714

m = 71.43

The mass is roughly 71.43 kilograms.

4 0
3 years ago
Why is there no electric field at the center of a charged spherical conductor?
Alja [10]
I reported this question by accident, I am sorry.

Anyways, there is no electric field at the center of a charged spherical conductor because all the charged particles are at the edges and because of the complete cancellation everywhere.
5 0
4 years ago
A woman can read the large print in a newspaper only when it is at a distance of 55 cm or more from her eyes.
serious [3.7K]

Answer:

Farsightedness (hyperopic)

2.79 D

Explanation:

When a person cannot see something which is close to their eyes this condition is known as farsightedness. She should use a convex lens to correct her eye sight.

u = Object distance =  22-2.7 = 19.3 cm

v = Image distance = -55+2.7 = -52.3 cm

f = Focal length

\frac{1}{f}=\frac{1}{u}+\frac{1}{v}\\\Rightarrow \frac{1}{f}=\frac{1}{19.3}+\frac{1}{-52.3}\\\Rightarrow \frac{1}{f}=\frac{3300}{100939}\\\Rightarrow f=\frac{100939}{3300}=30.58\ cm

The power of a lens is given by

P=\frac{1}{f}\\\Rightarrow P=\frac{1}{0.358}=2.79\ D

The power of her glasses should be 2.79 D

3 0
3 years ago
A car is traveling at a constant speed of 20 m/s for 3 seconds. Then the driver puts on the brakes. The total distance the car t
yarga [219]

Answer:

15 seconds

Explanation:

If car was moving at 20m/s for 3 sec.

if car traveled 100m = 15 sec total

3 0
3 years ago
Though you add heat, the temperature of boiling water remains constant because ...
Harlamova29_29 [7]
The temperature rises during boiling.
5 0
3 years ago
Other questions:
  • Certain bacteria (such as Aquaspirillum magnetotacticum) tend to swim toward the earth’s geographic north pole because they cont
    10·1 answer
  • What is gravity in earth.​
    6·1 answer
  • How is a good slide into a base performed?
    10·1 answer
  • A volcano erupts spewing ash into the air and sending lava flowing down the side of the mountain. Looking at the image explain h
    6·1 answer
  • According to Newton's Law of Cooling, if a body with temperature T 1 is placed in surroundings with temperature T 0, different f
    14·2 answers
  • A car was moving a 14 m/s. After 30 seconds, it’s speed increased to 20 m/s. What was its acceleration during this time?
    8·2 answers
  • I need help with my science question its this Explaining What factors affect an object's kinetic energy?
    11·1 answer
  • A football player kicks a ball with a mass of 0.5 kg. The average acceleration of the football was 15 m/s/s. How much force did
    15·1 answer
  • I have this bigfoot worksheet for science. It says, "When designing an experiment, which two groups must be involved?" Can you h
    10·1 answer
  • relationship between the length (l) and ohmic conductor, its thickness (d) and the opposition (R) it offers a current passage​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!