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stealth61 [152]

3 years ago

9

According to the Big Bang theory timeline, all matter and energy was compressed into a very small volume at an extremely high te

mperature.
a. True
b. False

1 answer:

IceJOKER [234]3 years ago

3 0

The answer i know is True

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Anyone know which wire matches the other one? for all 4. Need help! Thanks :-)

Fittoniya [83]

red goes to red, black goes to white, yellow goes to green, blue goes to blue.

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3 years ago

A car was moving at 14 m/s After 30 s, its speed increased to 20 m/s. What was the acceleration during this time ( need help fas

Arada [10]

Answer:let initial velocity u=14m/s

Final velocity v=20m/s

Time taken t=30

Acceleration =a

V=u +at

a= (20-14)/30

a=0.2m/s^2

Explanation:

Acceleration is the change in velocity with respect to time.

7 0

3 years ago

A twin-sized air mattress used for camping has dimensions of 100 cm by 194 cm by 14 cm when blown up. The weight of the mattress

Paul [167]

Answer:

$2625.156\ \text{N}$

Explanation:

Dimensions of mattress 100 cm by 194 cm by 14 cm

$m_m$ = Mass of mattress = 4 kg

$\rho$ = Density of water = $1000\ \text{kg/m}^3$

g = Acceleration due to gravity = $9.81\ \text{m/s}^2$

Volume of mattress

$V=100\times 194\times 14=271600\ \text{cm}^3=0.2716\ \text{m}^3$

Weight of water displaced is equal to the buoyant force

Mass of water

$m=\rho V\\\Rightarrow m=1000\times 0.2716\\\Rightarrow m=271.6\ \text{kg}$

Mass of person would be

$m_p=m-m_m=271.6-4\\\Rightarrow m_p=267.6\ \text{kg}$

Weight of the person would be

$w=m_pg\\\Rightarrow w=267.6\times 9.81\\\Rightarrow w=2625.156\ \text{N}$

The air mattress could hold a person that weighs up to $2625.156\ \text{N}$ .

8 0

2 years ago

What is likely happening at the boundary between the Nazca plate and the Pacific plate?

Nataly_w [17]

<span>The eastern margin is a convergent boundary subduction zone under the South American Plate and the Andes Mountains, forming the Peru–Chile Trench. The southern side is a divergent boundary with the Antarctic Plate, the Chile Rise, where seafloor spreading permits magma to rise.</span>

8 0

3 years ago

Read 2 more answers

In 2013, the world record depth for free diving without assistance was 101 m. What is the pressure in the water (assumed freshwa

serg [7]

Answer:

The pressure in the water is $1.1\times10^{6}\ Pa$

Explanation:

Given that,

Depth = 101 m

Let P be the pressure at the bottom of water at a depth

We need to calculate the pressure in water

Using formula of pressure

$P=P_{w}+P_{atm}$

Where, $P_{atm}$ = atmospheric pressure

$P_{w}$ = pressure in water

Put the value of $P_{w}$ in to the formula

$P=\rho hg+P_{atm}$

Put the value into the formula

$P=1000\times101\times9.8+101325$

$P=1.1\times10^{6}\ Pa$

Hence, The pressure in the water is $1.1\times10^{6}\ Pa$

6 0

2 years ago

Read 2 more answers