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liberstina [14]
3 years ago
8

Can someone help me. PPPPPLLLLLLLLZZZ!!!!!!!!!!

Physics
1 answer:
Solnce55 [7]3 years ago
8 0

Answer:

The answer would be d because of were the bolt is it has to reset after using it.

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What would be your estimate of the age of the universe if you measured a value for Hubble's constant of H0 = 30 km/s/Mly ? You c
Maksim231197 [3]

Answer:

The age of the universe would be 9.9 billion years

Explanation:

We can calculate an estimate for the age of the Universe from Hubble's Law. Let's suppose the distance between two galaxies is D and the apparent velocity with which they are separating from each other is v. At some point, the galaxies were touching, and we can consider that time the moment of the Big Bang.

Thus, the time it has taken for the galaxies to reach their current separations is:

\displaystyle{t=D/v}

and from Hubble's Law:

v =H_0D

Therefore:

\displaystyle{t=D/v=D/(H_0\times D)=1/H_0}

With the given value for the Hubble's constant we have:

H_0=(30\ km/s/Mly) \times (1 Mly/ 9.461 \times 10^{18} km) = 3.17\times 10^{-18}\ 1/s

and thus,

t=1/H_0 = 1/(3.17\times 10^{-18} 1/s) = 0.315 \times 10^{18}\ s \approx 9988584474.8858\ years \approx 9.9\ billion\ years

6 0
2 years ago
Help please, what does gravitational force do according to these answer choices?
laiz [17]

Answer:

the answer is C

Explanation:

gravity forces down not up or sideways.

5 0
2 years ago
In the areas called pauses such as the tropopause, the temperature line is vertical. What does this indicate about the temperatu
ivolga24 [154]

Answer:

the answer is A

Explanation:  The vertical temperature line indicates no change in temperature at those altitudes.

6 0
2 years ago
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Most of the currents identified have a circular shape. This is because as the air and water move between the equator to the pole
Morgarella [4.7K]
I believe it is true . Somebody correct me if I’m wrong!
5 0
2 years ago
Before 1960, people believed that the maximum attainable coefficient of static friction for an automobile tire on a roadway was
True [87]

This problem is looking for the minimum value of μs that is necessary to achieve the record time. To solve this problem:


Assuming the front wheels are off the ground for the entire ¼ mile = 402.3 m, the acceleration a = µs·9.8 m/s².


For a constant acceleration, distance = 402.3


m = 1/2at^2 = 804.6 m / (4.43 s)^2 = a = µs·9.8 m/s^2



µs = 804.6 m / (4.43s)^2 / 9.8 m/s^2 = 4.18

5 0
3 years ago
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