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3 years ago

The surface below sedimentary rocks that overlie igneous or metamorphic rocks is termed a(n) ____.

Physics

1 answer:

Luden [163]3 years ago

4 0

The surface below sedimentary rocks that overlie igneous or metamorphic rocks is a(n) nonconformity.

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With what minimum speed must you toss a 200 g ball straight up to just touch the 15-m-high roof of the gymnasium if you release

victus00 [196]

Total energy before the toss:
$E_1 = \frac{1}{2} mv_1^2 + mgh_1$

Total energy at the roof:
$E_2 = \frac{1}{2} mv_2^2 + mgh_2$

Energy must be conserved so :
$E_1 = E_2 \\ \\ \frac{1}{2} mv_1^2 + mgh_1 = \frac{1}{2} mv_2^2 + mgh_2 \\ \\ \frac{1}{2} m (v_1^2 - v_2^2) = mg(h_2 - h_1) \\ \\ \frac{1}{2} (v_1^2 - v_2^2) = g(h_2 - h_1) \\ \\ v_1^2 - v_2^2 = 2g(h_2 - h_1)$

If v₁ is the initial velocity and v₂ is the final velocity, which is zero at the roof:
$v_1^2 = 2g(h_2 - h_1) \\ \\ v_1 = \sqrt{2g(h_2 - h_1)}$

$v_1 = \sqrt{(2)(9.81 \frac{m}{s^2} )(15m - 1.6m)} = 16,2 \frac{m}{s}$

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3 years ago

The power in a circuit is 2W and the voltage is 20VDC. Whats the curcuit current?

rodikova [14]

Explanation:

Power = current × voltage

P = IV

2 W = I (20 V)

I = 0.1 A

7 0

3 years ago

What is the actual land form of a shield volcano? PLEASE HELP

Mazyrski [523]

The land form is formed by lava flows of low viscosity

Hope this helps! :)

4 0

3 years ago

Read 2 more answers

SOMEBODY PLEASE HELP!! 20 PTS!!!

aliya0001 [1]

Answer:

1. Reflection

2. travel from one medium to another

3. Same waves to travel in opposite direction.

Explanation:

1. When a wave strikes a solid barrier, it bounces back in the same medium. This wave behavior of bouncing back is known as reflection. Its like a basketball hitting a backboard. The ball bounces back at the same angle as it was incident. ∠i = ∠r

2. For refraction to occur in a wave, the wave must travel from one medium to another. When light travels from through mediums of different optical densities, it bends. The wave bends away normal when it enters from denser medium to rarer medium. The wave bends towards the normal when it enters from rarer to denser medium. The angle of refraction and angle of incidence are related by Snell's law.

$\frac{sin(i)}{sin(r)} = \frac{\mu_2}{\mu_1}$

3. The formation of standing wave requires two same waves to travel in the opposite direction and interfere. The incident wave and reflected wave when interfere, form standing waves. There waves are also resonances or harmonics. A standing wave oscillates at one place and does not transfers any energy.

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3 years ago

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You are In-line skates at the top of a small hill. Your potential energy is equal to 1000 J. The last time we checked, your mass

stira [4]

A) Weight = mass × acceleration (due to gravity)

= 60×9.8

= 588 N

B) Potential energy = mass x gravity x change in height

1,000 = 60.0 x 9.8 x h

h = 1.7 m

C) Kinetic energyF = potential energyI

KEF = 1/2mv2

PEI = mgh = 1,000 J

1/2mv2 = 1,000

1/2(60.0)v2 = 1,000

v2 = 33.33

v = 5.77 m/s

3 0

3 years ago