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Sever21 [200]
3 years ago
13

According to the Big Bang theory, the universe was once very __________ and is now __________.

Physics
2 answers:
Ne4ueva [31]3 years ago
8 0
<span>dense; expanding is the one</span>
Tatiana [17]3 years ago
3 0
<span>According to the Big Bang theory, the universe was once very dense and is now expanding. </span>
You might be interested in
A bungee cord with a spring constant of 800 stretches 6 meters at its greatest displacement. How much elastic potential energy d
Vinil7 [7]

Elastic potential energy is given by formula

U = \frac{1}{2} kx^2

here we know that

k = 800 N/m

x = 6 m

Now using above formula we have

U = \frac{1}{2}(800)(6^2)

U = 14400 J

So elastic potential energy in the chord is 14400 J

4 0
3 years ago
The total electric field consists of the vector sum of two parts. One part has a magnitude of E1 = 1300 N/C and points at an ang
V125BC [204]

Answer:

2954.6 N/C, 46.36 degree from positive  axis

Explanation:

E1 = 1300 N/C, θ1 = 35 degree

E2 = 1700 N/C, θ2 = 55 degree

Now write the electric fields in vector form

E1 = 1300 ( Cos 35 i + Sin 35 j) = 1064.9 i + 745.6 j

E2 = 1700 ( Cos 55 i + Sin 55 j) = 975.08 i + 1392.6 j

Resultant electric field

E = E1 + E2

E =  1064.9 i + 745.6 j + 975.08 i + 1392.6 j

E = 2039.08 i + 2138.2 j

Magnitude of E

E = sqrt (2039.08^2 + 2138.2^2)

E = 2954.6 N/C

Let it makes an angle Φ from X axis

tan Φ = 2138.2 / 2039.08 = 1.049

Φ = 46.36 degree from positive X axis.

5 0
3 years ago
(GIVING BRAINLIST)
Leviafan [203]

Answer:

C

Explanation:

During an investigation you want to investigate different variables.

5 0
2 years ago
What is the mass of an object moving at a speed of 10.0 m/s with a kinetic energy of 760 J?
rewona [7]

Answer:

E

Explanation:

3 0
2 years ago
W is the work done on the system, and K, U, and Eth are the kinetic, potential, and thermal energies of the system, respectively
MArishka [77]

Answer:

1) a block going down a slope

2) a) W = ΔU + ΔK + ΔE, b) W = ΔE, c)  W = ΔK, d) ΔU = ΔK

Explanation:

In this exercise you are asked to give an example of various types of systems

1) a system where work is transformed into internal energy is a system with friction, for example a block going down a slope in this case work is done during the descent, which is transformed in part kinetic energy, in part power energy and partly internal energy that is represented by an increase in the temperature of the block.

2)

a) rolling a ball uphill

In this case we have an increase in potential energy, if there is a change in speed, the kinetic energy also increases, if the change in speed is zero, there is no change in kinetic energy and there is a change in internal energy due to the stationary rec in the point of contact

 W = ΔU + ΔK + ΔE

b) in this system work is transformed into internal energy

      W = ΔE

c) There is no friction here, therefore the work is transformed into kinetic energy

    W = ΔK

d) if you assume that there is no friction with the air, the potential energy is transformed into kinetic energy

      ΔU = ΔK

7 0
3 years ago
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