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avanturin [10]
3 years ago
11

Using a streak test on a mineral that is harder than 7 on Mohs scale would not be very useful True or False

Physics
1 answer:
aliya0001 [1]3 years ago
8 0

Answer: True true false true

Explanation:

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A girl pulls her younger brother on a sled along a flat sidewalk (the total mass of the sled is 30kg). A frictional force of 50N
harkovskaia [24]

Answer:

6.13 s

219 N

Explanation:

Newton's law in the x direction:

∑F = ma

150 cos 30° N − 50 N = (30 kg) a

a = 2.66 m/s²

Δx = v₀ t + ½ at²

(50 m) = (0 m/s) t + ½ (2.66 m/s²) t²

t = 6.13 s

Newton's law in the y direction:

∑F = ma

Fn + 150 sin 30° N − (30 kg) (9.8 m/s²) = 0

Fn = 219 N

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A load of 500 N is placed 8 N from the pivot what is the turning moment of the load
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Who is known as the "father of modern chemistry" because he first organized all known elements into four different
iVinArrow [24]

Answer:

D. Henry Moseley

Explanation:

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3 years ago
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For a constant voltage, how is the resistance related to the current?
Aleksandr-060686 [28]

Answer:

Resistance is inversely proportional to current, so when the resistance doubles, the current is cut in half. Resistance is directly proportional to current, so when the resistance doubles, the current is cut in half.

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According to the graph of displacement vs. time, what is the object's displacement at time = 60 s?
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The straight line that is obtained, intercept it on the y-axis and the value of displacement will obtained.

Explanation:

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