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1 year ago

Over the past 100 years earths temperature

Physics

1 answer:

pogonyaev1 year ago

3 0

Answer:

<u>Over the last century, the average surface temperature of the Earth has increased by about 1.0o F.</u>

Explanation:

hope this helps you!!

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How do helmets protect your head? a. By creating a large area to spread out the pressure of a blow to your head. b. By focusing

Andru [333]

Your answer is A.

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2 years ago

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What may be a serious side effect of anti-depressants specific in adolescents?

Klio2033 [76]

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2 years ago

A straight railroad track is being built to connect two cities. the measured distance of the track between the two cities is 160

elena55 [62]

Let point A be 0.0 miles (first city)
Let point B be 160.5 miles (first city to second city)
Let point C be 28.5 miles (first city to mail stop)

Take C – A = C [28.5 - 0.0 = 28.5] (This checks the distance between city 1 and Mail stop)

Then Take B – C = Distance from the first city to the second city [160.5 - 28.5 = 132 Miles]

Answer: The Mail stop is 132 miles from the Second City.

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2 years ago

The tops of the towers of the Golden Gate Bridge in San franciscoo , are 227 m above the water. Suppose a worker drops a 655 g w

yaroslaw [1]

Answer:

Kinetic energy is 1425.11 J.

Explanation:

Given:

Mass of the wrench is, $m=655\ g=0.655\ kg$

Height of fall is, $h=227\ m$

Force of resistance is, $F=0.141\ N$

Now, the total energy at the top is equal to the potential energy of the wrench at the top since the kinetic energy at the top is 0.

Now, potential energy at the top is given as:

$U=mgh\\U=0.655\times 9.8\times 227\\U=1457.113\ J$

Now, the potential energy at the top is converted to kinetic energy at the bottom and some energy is wasted in overcoming the resistance force by air.

Potential Energy = Kinetic energy + Energy to overcome resistance.

⇒ Kinetic energy = Potential Energy - Energy to overcome resistance.

Energy to overcome resistance force is the work done by the wrench against the resistance force and is given as:

$W_{res}=Fh=0.141\times 227=32.007\ J$

Therefore, Kinetic energy at the bottom is given as:

$K=U-W_{res}\\\\K=1457.113\ J - 32.007\ J\\\\K=1425.106\approx1425.11\ J$

Hence, the kinetic energy of the wrench be when it hits the water is 1425.11 J.

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2 years ago

If m=120kg and a=15m/s2, what is the force

Scorpion4ik [409]

Answer:

F= 1800N

Explanation:

the equation for force is F= ma

so plug in the numbers: F= (120)(15)

solve this to get F= 1800N

tip: don't forget to add the units when writing your answer :)

6 0

2 years ago