2 years ago

Which of the following is not a product of a complete combustion reaction of a hydrocarbon?

Physics

1 answer:

Romashka-Z-Leto [24]2 years ago

4 0

Answer:

I think the answer might be C

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2 years ago

A 53.0-kg skater is traveling due east at a speed of 2.90 m/s. A 72.0-kg skater is moving due south at a speed of 6.20 m/s. They

soldier1979 [14.2K]

Answer:

a. $\thta=71^{\circ}$

b. $v_f=3.78 m/s$

Explanation:

We are given that

$m_1=53 kg$

$v_1=2.9 m/s$

$m_2= 72 kg$

$v_2=6.2 m/s$

a.We have to find the angle

$\theta=tan^{-1}{\frac{m_2v_2}{m_1v_1}=\frac{72(6.2)}{53(2.9)}=71^{\circ}$

$\theta=71^{\circ}$

b. We have to find the speed $v_f$

According to law of conservation of momentum

$m_1v_1=(m_1+m_2)v_fcos\theta$

$53(2.9)=(53+72)v_fcos 71^{\circ}=40.7 v_f$

$v_f=\frac{153.7}{40.7}=3.78 m/s$

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2 years ago

If a car is traveling at a velocity of +10m/s suddenly turns around and continues at the same speed, what is its new velocity?

Lady_Fox [76]

Answer:

-10m/s

Explanation:

only the magnitude of the velocity will change due to the change in direction of the car.

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3 years ago