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morpeh [17]
3 years ago
14

C. gas.

Physics
1 answer:
DIA [1.3K]3 years ago
7 0

The correct answer is D. baking a cake

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What is the relative size and composition of the universe, a galaxy, and a solar system?
slava [35]

The solar system is smaller than a galaxy. Galaxies are composed of solar systems. The solar system is composed of planets revolving around a star (such as our sun). To put into perspective, there are about hundreds of billions of stars in our galaxy (the milky way). On the other hand, billions of galaxies make up the universe.

The speed of light is constant which is 299 792 458 m / s. The time is taken for light to reach an object can be used to measure the distance between objects in space. This is done by multiplying the time by the speed of light.

Distance in space is so vast and therefore impractical to use the basic SI units of meters and kilometers we use here on earth. Therefore the use of astronomical units and light years is used. Light years is the distance that light can cover in a year in the vacuum of space, while astronomical units is the distance between solar systems.

6 0
2 years ago
In what speed does an object fall, if after 10 seconds it hits the surface of Earth?​
Maru [420]

Answer:

98m/s

Explanation:

Given parameters:

Time  = 10s

Unknown:

Final speed  = ?

Solution:

To solve this problem, we use the expression below;

          v  = u + gt

v is the final velocity

u is the initial velocity  = 0m/s

g is the acceleration due to gravity  = 9.8m/s²

t is the time

   so;

         v = 0 + 9.8 x 10  = 98m/s

8 0
3 years ago
If a rock is dropped with a weight of 50kg and friction due to air resistance produces a force of 98N, what is the net force in
bearhunter [10]

Answer:

The net force is 392N, pointing down.

Explanation:

The net force is the sum of all forces acting on the rock, namely the gravity ("+" acting downward) and the friction force due to air resistance ("-" acting upward):

F_{net} = F_g - F_{air}\\F_{net} = m\cdot g - F_{air} = 50kg\cdot 9.8\frac{m}{s^2}-98N= (490-98)N=392N

The net force is 392N and pointing down (positive)/

8 0
4 years ago
Which missing item would complete this beta decay reaction?
Flauer [41]
For us to understand the missing item that would complete beta decay reaction, we need to achieve in depth understanding of chemical formulas and nuclear symbols. Next is to have great comprehension of the following points:
<span>1.) Neutron in nucleus breaks down and changes into a proton.
2) Then it emits an electron, as well as an anti-neutrino which go into space.
3) Lastly, atomic number continuously goes UP while mass number remains unchanged.</span>
8 0
3 years ago
If 4000 C of charge pass through a section of wire in 50 seconds, what would the current be?
9966 [12]

Answer:

Explanation:

Given that,

Charge through a wire is

Q = 4000C

Time for charge to pass through the wire is

t = 50seconds

Then,

Current through the wire is the rate of charge passing through the wire

Q = it

Where

Q is charge.

I is current

t is time taken

Therefore,

I = Q / t

I = 4000 / 50

I = 80 Amps

3 0
4 years ago
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