3 years ago

What are the 3 main causes of global warming?

Physics

2 answers:

Virty [35]3 years ago

7 0

Answer:

Carbon pollution.

Climate change.

Energy.

Explanation:

salantis [7]3 years ago

3 0

Answer:

carbon pollution.

climate change.

energy.

Explanation:

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A ball thrown straight up climbs for 3.0 sec before falling. Neglecting air resistance, with what velocity was the ball thrown?

sesenic [268]

Answer:

Speed, u = 29.4 m/s

Explanation:

Given that, A ball thrown straight up climbs for 3.0 sec before falling, t = 3 s

Let u is speed with which the ball is thrown up. When the ball falls, v = 0

Using first equation of motion as :

v = u + at

Here, a = -g

So, u = g × t

$u=9.8\times 3$

u = 29.4 m/s

So, the speed with which the ball was thrown is 29.4 m/s. Hence, this is the required solution.

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4 years ago

Is the tropic of cancer north or south of the equator?

Daniel [21]

It’s North of the equator

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3 years ago

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What is not a reason correlations are useful?

Vikki [24]

<span>Correlations allow you to make inferences.</span>

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3 years ago

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if a current of 0.3 ampere flows through a conductor of resistance of 11.7 ohm's,the voltage across the ends of the conductor is

Gnesinka [82]

Here,

Resistance = 11.7

Ampere = 0.3

Voltage = ?

Now,

R = V/A

11.7 = V/0.3

11.7*0.3 =V

V = 3.51

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7 0

3 years ago

A man of mass 80.0 kg stands on a platform of mass 40.0 kg. He pulls on a rope that is fastened to the platform and runs over a

Vesnalui [34]

Answer:F=648 N

Explanation:

Given

mass of man $m_1=80 kg$

mass of Platform $m_2=40 kg$

acceleration of system $a=1 m/s^2$

Let F be the force with which man pulls the rope which will also create a tension of F in rope

From Diagram

$2F-(m_1+m_2)g=(m_1+m_2)a$

$2F=(m_1+m_2)(g+a)$

$F=\frac{(m_1+m_2)(g+a)}{2}$

$F=\frac{(80+40)(9.8+1)}{2}$

$F=\frac{1296}{2}$

$F=648 N$

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4 years ago