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3 years ago

PLEASE HELP !!!

Physics

2 answers:

Igoryamba3 years ago

8 0

A snake if I'm correct

Margarita [4]3 years ago

4 0

Snake I think idk who asked u this

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How many time zones is the world divided into

Eddi Din [679]

Answer:

there are 24 time zones

Explanation:

each time zone is roughly 15°apart

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3 years ago

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A train car of mass 3,825 kg sits at rest on the track. A second car of mass 5,169 kg moving at 6 m/s slams into it and they sti

Anni [7]

The final combined speed of the two trains is 3.4 m/s

Explanation:

We can solve this problem by using the law of conservation of momentum: in absence of external forces, the total momentum of the two trains must be conserved before and after the collision.

Therefore we can write:

$p_i = p_f\\m_1 u_1 + m_2 u_2 = (m_1+m_2)v$

where:

$m_1 = 3,825 kg$ is the mass of the first train

$u_1 = 0 m/s$ is the initial velocity of the first train, which is at rest

$m_2 = 5,169 kg$ is the mass of the second train

$u_2 = 6 m/s$ is the initial velocity of the second train

$v$ is the final combined velocity of the two trains after the collision

We can now solve the equation for v, to find the final combined velocity of the two trains:

$v=\frac{m_1 u_1 + m_2 u_2}{m_1+m_2}=\frac{0+(5169)(6)}{3825+5169}=3.4 m/s$

So, the final combined speed is 3.4 m/s.

Learn more about momentum here:

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3 years ago

When the material in the mantle cools off near the surface then sinks

MatroZZZ [7]

I’m guessing convection currents since you mention mantle and core, reminds me of heat

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3 years ago

Calculate the net force experienced by Mr. Ferrari if he has a mass of 100 kg and an acceleration of 3.5 m/s/s.

saveliy_v [14]

The answer is 350. the formula for net force is f=ma which means you multiply the mass times he acceleration. 100 times 3.5 is 350

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3 years ago

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An alternating-current (AC) source supplies a sinusoidally varying voltage that can be described with the function v of t is equ

Marrrta [24]

Answer:

ω, the angular frequency of the source equals 377 rad/s

Explanation:

From the question, V(t) = V cosωt.

Now, ω = the angular frequency of the sinusoidal wave is given by

ω = 2πf where f = the frequency of the source = 60 Hz

So, the angular frequency of the source ,ω = 2π × the frequency of the source.

So, ω = 2πf

ω = 2π × 60 Hz

ω = 120π rad/s

ω = 376.99 rad/s

ω ≅ 377 rad/s

So, ω, the angular frequency of the source equals 377 rad/s

3 0

3 years ago