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3 years ago

13

Which characteristics of rocks are used in classification? Check all that apply.

2 answers:

Alik [6]3 years ago

8 0

Answer:

origin

texture

composition

Explanation:

2020 edge nuity

Elanso [62]3 years ago

3 0

Answer:

i think it is texture and composition

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For lunch you and your friends decide to stop at the nearest deli and have a sandwich made fresh for you with 0.300 kg of Italia

Oliga [24]

Answer with Explanation:

We are given that

$m_1=0.3 kg$

$m_2=0.4 kg$

Spring constant, $k=200 N/m$

$h=0.250 m$

a.Speed of ham before collision

$u=\sqrt{2gh}=\sqrt{2\times 9.8\times 0.25}=2.2m/s$

Collision is inelastic

According to law of conservation of momentum

$m_1u_1=(m_1+m_2)v$

$0.3\times 2.2=(0.3+0.4)v$

$v=\frac{0.3\times 2.2}{0.7}=0.94 m/s$

Kinetic energy of masses=Spring potential energy at maximum distance

$\frac{1}{2}(m_1+m_2)v^2=\frac{1}{2}kA^2$

$A^2=\frac{(m_1+m_2)v^2}{k}$

$A=\sqrt{\frac{(m_1+m_2)v^2}{k}}$

Substitute the values

$A=\sqrt{\frac{(0.3+0.4)\times (0.94)^2}{200}}=0.056 m=0.056\times 100=5.6 cm$

1 m=100 cm

b.Time period, $T=2\pi\sqrt{\frac{(m_1+m_2)}{k}}$

$T=2\pi\sqrt{\frac{(0.3+0.4)}{200}}=0.37 s$

7 0

3 years ago

Which of the following is a terrestrial planet on which one would observe the Sun rising in the west and setting in the east?

Romashka-Z-Leto [24]

The correct answer is Venus

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3 years ago

Check My Work (1 remaining) Boron coated with SiC (or Borsic) reinforced aluminum containing aligned 20 vol% fibers is an import

Lubov Fominskaja [6]

Answer:

$E = 12 * 10^{6} Psi$

Explanation:

Modulus of Elasticity perpendicular to the fibre,

$\frac{1}{E} = \frac{B_{B} }{E_{B} } + \frac{B_{Al} }{E_{Al} }$

$B_{B} = 20% = 0.2\\$

$B_{Al} = 80% = 0.8$

$E_{B} =55 * 10^{6} Psi$

$E_{Al} =10 * 10^{6} Psi$

$\frac{1}{E} = \frac{0.2 }{55 * 10^{6} } + \frac{0.8 }{10 *10^{6} }$

$\frac{1}{E} = 8.36 * 10^{-8} \\E = \frac{1}{8.36 * 10^{-8} }\\E = 12 * 10^{6} Psi$

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3 years ago

A pulley system has an MA of 4. How much force would be necessary to pull a 200 newton box

Airida [17]

Mechanical advantage is defined as

$MA = \frac{F_{output}}{F_{input}}$

MA = 4

now we will have

$F_{output} = 200 N$

as we need to pull up a box of weight 200 N

now by above formula we can find how much force it requires to pull up the box

$4 = \frac{F_{output}}{F_{input}}$

$4 = \frac{200}{F_{input}}$

$F_{input} = \frac{200}{4} = 50 N$

so it requires 50 N force to pull the weight of 200 N

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3 years ago

Two drivers make a 100-km trip. 1 completes the trip in 2 hours. driver 2 takes 3 hours but stops for an hour halfway. which dri

expeople1 [14]

Neither because if driver 2 hadn't stopped, they both would've finished in the same amount of time.

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3 years ago