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
anastassius [24]
3 years ago
11

Scientists used to believe that the earth was the center of the universe. which invention was primarily responsible for obtainin

g evidence against this?
a.sextant
b.astrolabe
c.hubble telescope
d.optical telescope
Physics
1 answer:
BigorU [14]3 years ago
6 0
The answer is D, Optical telescope.
You might be interested in
How could a sedimentary rock provide evidence that the rock cycle exists?\?
worty [1.4K]
If im right the answer is wrong actually because no clue
3 0
3 years ago
A crate is pulled with a force of 165 N at an angle 30 ° northwest. What is the resultant horizontal force on the crate?
Ad libitum [116K]

Answer:

Resultant horizontal force = 143 N

Explanation:

Since the a gle is 30° northwest, then it means the resultant force will be horizontal and as such;

Resultant horizontal force = 165 * cos 30

Resultant horizontal force = 142.89

Approximating to a whole number gives;

Resultant horizontal force = 143 N

5 0
1 year ago
How will you relate yourself to stellar evolution?
adoni [48]

Answer:

<em>Stellar evolution is the process by which a star changes over the course of time. Depending on the mass of the star, its lifetime can range from a few million years for the most massive to trillions of years for the least massive, which is considerably longer than the age of the universe. The table shows the lifetimes of stars as a function of their masses.[1] All stars are formed from collapsing clouds of gas and dust, often called nebulae or molecular clouds. Over the course of millions of years, these protostars settle down into a state of equilibrium, becoming what is known as a main-seque</em>

6 0
2 years ago
How much force is needed to accelerate a 20 kg mass at a rate of 4 m/s to the second power?
dusya [7]

Answer:

So 55 Newtons are needed.

6 0
2 years ago
Read 2 more answers
How can u tell matched forces act on objects?
mamaluj [8]

Answer:If an object's speed changes, or if it changes the direction it's moving in,

then there must be forces acting on it. There is no other way for any of

these things to happen.

Once in a while, there may be a group of forces (two or more) acting on

an object, and the group of forces may turn out to be "balanced".  When

that happens, the object's speed will remain constant, and ... if the speed

is not zero ... it will continue moving in a straight line.  In that case, it's not

possible to tell by looking at it whether there are any forces acting on it

3 0
2 years ago
Other questions:
  • If the force vector has a magnitude of F = 12.5 N, the displacement has a length of Δr = 0.75 m, and the angle between the vecto
    6·1 answer
  • In classical mechanics there are three base dimensions. length is one of them. what are the other two? view available hint(s)
    8·1 answer
  • A hot spot is an area where material from deep within the mantle rises and melts through the crust above it. True or false need
    9·2 answers
  • On which factor does the inertia of rest depends​
    5·1 answer
  • Please help
    7·1 answer
  • Two blocks with different mass are attached to either end of a light rope that passes over a light, frictionless pulley that is
    14·1 answer
  • Differentiate between the factor(s) that affect inertia and momentum.
    13·1 answer
  • Please refer to the picture
    14·1 answer
  • A skipper on a boat notices wave crests passing the anchor chain every 6.0 seconds. The skipper estimates the distance between c
    7·1 answer
  • A ball is thrown from the top of a 15.0 m tall building. The ball is initially released with a speed of 25.0 m/s in the directio
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!