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Vesna [10]
3 years ago
12

Some compounds are classified as acids or bases . The ph scale shows how acidic or how basic these compounds are the lower the p

h the more acidic a compounds is the higher the ph the more basic it is . Sodium hydroxide a compound commonly found in drain cleaners has a ph of about 13. Which of these phrases describe sodium hydroxide
Physics
1 answer:
lianna [129]3 years ago
8 0

the answer could be (very basic) since options arent given

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An object has a mass of 5 kg and a velocity of 20 m/s. What is the momentum of the object?(1 point)
kotegsom [21]

Answer:

option C is correct

Explanation:

given mass=5 kg  

velocity=20 m/s

momentum,P=m v

p=5*20=100 kg m/s

3 0
3 years ago
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How does a material become a magnet?​
Nitella [24]

Answer:

To become magnetized, another strongly magnetic substance must enter the magnetic field of an existing magnet.

8 0
4 years ago
A spy satellite uses a telescope with a 1.7-m-diameter mirror. It orbits the earth at a height of 180 km.
WINSTONCH [101]

Answer: the minimum spacing that must be there between two objects on the earth's surface if they are to be resolved as distinct objects by this telescope 6.45 cm

Explanation:

Given that;

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height h = 180 km = 180 × 10³ m

wavelength λ = 500 nm = 5 × 10⁻⁹ m

Now Angular separation from the peak of the central maximum is expressed as;

sin∅= 1.22 λ / d

sin∅ = (1.22 × 5 × 10⁻⁹) / 1.7

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we know that;

 sin∅  = object separation / distance from telescope

object separation =   sin∅ × distance from telescope

object separation = 3.588 × 10⁻⁷  × 180 × 10³

object separation =6.45 × 10⁻² m

then we convert to centimeter

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Therefore the minimum spacing that must be there between two objects on the earth's surface if they are to be resolved as distinct objects by this telescope 6.45 cm

5 0
3 years ago
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Alika [10]
Venus shares a similar size, surface composition, and has an atmosphere with a complex weather system. Venus is different from Earth because it spins the opposite direction of Earth and it’s rotation is very slow.
8 0
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at 1 p.m. a car traveling at a constant velocity of 78 km per hour towards the West it's 34 km to the west of our school how far
Fittoniya [83]

83 km/h * 2.5 hours (3:30 - 1:00) = 207.5 km  

207.5 km - 15 km = 192.5 km

3 0
3 years ago
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