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In-s [12.5K]
3 years ago
12

Always been observed to be true, law or theory?

Physics
2 answers:
sattari [20]3 years ago
8 0
A law has always been observed to be true
zavuch27 [327]3 years ago
6 0
Law is something that's observed to be true, such as gravity. We don't know what it really is, but we know it's there.
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A boulder released by a rockslide rolls 60 m in 4 s. What is its average speed?
Gelneren [198K]

Answer:

15 m per second

900m per minute

54,000 per hour

Explanation:

60 divided by 4 to get per second then times 60 for per minutes

then times 60 to get per hour

5 0
3 years ago
Which unit would you use to express the height of your desk?
swat32
Height is the length by nature so i'll use meter to express it!
8 0
3 years ago
Two steel guitar strings have the same length. String A has a diameter of 0.513 mm and is under 403 N of tension. String B has a
Mnenie [13.5K]

Answer:

\frac{v_{A}}{v_{B}} = 1.785

Explanation:

T_{A} = Tension force in string A = 403 N

T_{B} = Tension force in string B = 800 N

d_{A} = diameter of string A = 0.513 mm

d_{B} = diameter of string B = 1.29 mm

v_{A} = wave speed of string A

v_{B} = wave speed of string B

Ratio of the wave speeds is given as

\frac{v_{A}}{v_{B}} = \sqrt{\frac{T_{A}}{T_{B}}} \left ( \frac{d_{B}}{d_{A}} \right )

\frac{v_{A}}{v_{B}} = \sqrt{\frac{403}{800}} \left ( \frac{1.29}{0.513} \right )

\frac{v_{A}}{v_{B}} = 1.785

5 0
3 years ago
Help plzz!!
frez [133]

Answer: It would be 125 J

4 0
2 years ago
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Help with atomic mass
Dafna1 [17]

Explanation:

what?? do you please say clearly

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3 years ago
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