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4 years ago

0. Placer deposits form when ____. (1 point)

1 answer:

3 0

<span>21 is problematic as coal is legally a mineral resource but not geologically a mineral. That wouldn't be too bad if aggregate wasn't also legally a mineral resource but not geologically a mineral. </span>

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If a nearsighted person has a far point df that is 3.50m from the eye, what is the focal length f1 of the contact lenses that th

olga55 [171]

Answer:

f1= -350cm or -3.5m

f2= 22.1cm or 0.221m

Explanation:

A person is nearsighted when the person's far point is less than infinity. A diverging lens is normally used to correct this eye defect. A diverging lens has a negative focal length as seen in the solution attached.

Farsightedness is when a person's near point is farther than 25cm. This eye defect is corrected using a converging lens. The focal length of a converging lens is positive. This is evident in the solution attached. The near point is also referred to as the least distance of distinct vision.

3 0

3 years ago

Please help me with this

Firlakuza [10]

Answer:

can't see anything sorry can't help

7 0

3 years ago

Read 2 more answers

Andrew skis down a hill.

IceJOKER [234]

Explanation:

gravitational potential energy at the top of the hill, which transforms into kinetic energy as he moves bottom of the hill

that's mean potential energy transfoms into kinetic energy

5 0

3 years ago

What are the four types of musical instruments and what are the physical behind each type of musical instrument

pishuonlain [190]

Answer:

The four types of musical instruments are percussion, woodwind, brass, and strings.

Explanation:

Percussion instruments include drums, triangle, cymbals, and xylophones. There are more instruments than what i've mentioned though. Percussion instruments often produce the beat of songs.

Woodwind instruments include clarinets, oboe, flute, and saxophone. Woodwind instruments often produce the harmony of songs and, occasionally, the melody.

Brass instruments include trumpet, trombone, french horn, and tuba. Brass instruments often produce the harmony of songs, the trumpet produces the melody a lot though.

String instruments include guitars, violins, cello, bass, ukulele, and banjo. String instruments produce both the harmony and the melody. These instruments often produce really beautiful music, in my opinion.

8 0

3 years ago

The pressure in a compressed air storage tank is 1200 kPa. What is the tank's pressure in (a) kN and m units, (b) kg, m, and s u

Sever21 [200]

Answer:

a) 1200 kN/m²

b) 1,200,000 kg/ms²

c) 1.2 × 10⁹ kg/km.s²

Explanation:

Given:

Pressure = 1200 kPa

a) 1 Pa = 1 N/m²

thus,

1000 N = 1 kN

1200 kPa = 1200 kN/m²

b) 1 Pa = 1 N/m² = 1 kg/ms²

Thus,

1200 kPa = 1200000 Pa

1200000 Pa = 1200000 × 1 kg/ms²

= 1,200,000 kg/ms²

c) 1 km = 1000 m

1 m = 0.001 Km

thus,

1,200,000 kg/ms² = $\frac{1,200,000}{0.001}\frac{kg}{km.s^2}$

= 1.2 × 10⁹ kg/km.s²

3 0

3 years ago