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3 years ago

12

Before 2006, while Pluto was still considered a planet, people used this saying to remember the nine planet names: "My very exce

llent mother just sent us nine pizzas." Come up with a new sentence to help remember the eight planet names, in order.

1 answer:

Serjik [45]3 years ago

4 0

Answer:

Mother's Visit Evoked My Junior Sister's Unseen Niceness

Explanation:

Mother's - M - stands for Mercury

Visit - V - Stands for Venus

Evoked - E - Stands for Earth

My - M - stands for Mars

Junior -J - stands for Jupiter

Sister's -S- Stands for Saturn

Unseen -U - stands for Uranus

Niceness - S- stands for Neptune

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$V^2=U^2+2aS$

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b)

C to D

Vd= 0 m/s

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c)

Here

Vb= 5.42 m/s

Vc= 5.33 m/s

We know that

Acceleration is the rate of change of velocity

$a=\dfrac{V_c-V_b}{t}$

$a=\dfrac{5.33-5.42}{8\times 10^{-5}}$

$a=-1125\ m/s^2$

d)

Now length compressed given as

$V_c^2=V_b^2+2a\Delta L$

$5.33^2=5.42^2-2\times 1125\times \Delta L$

Δ L= 0.43 mm

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Answer:

$K=512J$

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$p_i=m_1v_{1i}+m_2v_{2i}$

$p_f=m_1v_{1f}+m_2v_{2f}$

Since momentum is conserved, $p_i=p_f$ , which means:

$m_1v_{1i}+m_2v_{2i}=m_1v_{1f}+m_2v_{2f}$

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$m_1v_{1i}+m_2v_{2i}=m_1v_{1f}$

which is the same as:

$v_{1f}=\frac{m_1v_{1i}+m_2v_{2i}}{m_1}$

Considering the direction the bullet moves initially as the positive one, and writing in S.I., this gives us:

$v_{1f}=\frac{(0.01kg)(2000m/s)+(4kg)(-4.2m/s)}{0.01kg}=320m/s$

So kinetic energy of the bullet as it emerges from the block will be:

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