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Eddi Din [679]
3 years ago
5

Which of the following quantities is NOT a vector?

Physics
1 answer:
OverLord2011 [107]3 years ago
3 0
Kinetic energy is not a vector. This is because it is not a directed quantity. The other 3 have a sense of direction.
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Your friend comes across a good deal to purchase a gold ring. She asks you for advice and for you to test the ring. The ring has
Luden [163]

Answer:

She is not getting a good deal.

Explanation:

The equation that relates heat with mass, specific heat and temperature change of an object is Q=mc\Delta T.

Always convert temperature to Kelvin, although in our case it's not necessary because the \Delta T will be the same, and we will leave the mass in grams because we will be getting J/g^{\circ}C units for specific heat, which we can compare to the one given for gold.

We then calculate the specific heat of the object in question:

c=\frac{Q}{m\Delta T}=\frac{94.8J}{(4.54g)(47.5^{\circ}C-23^{\circ}C)}=0.8523 J/g^{\circ}C

Which shows it's not gold.

5 0
3 years ago
When forces acting on an object are __________, the object's motion is constant.
Ivanshal [37]
The correct answer Is B-balanced
7 0
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What is an ore?
iogann1982 [59]
Answer : a rock that contains a metal resource

Reason :

Ore - a naturally occurring solid material from which a metal or valuable mineral can be profitably extracted.
5 0
4 years ago
A force of 7.50N is applied to a spring whose spring constant is 0.289 N/cm. Find its change in length.​
kotykmax [81]

Hook's law states that

F=k\Delta x

where F is the applied force, k is the spring constant, and \Delta x is the change in length.

Plugging your values, we have

7.5 = 0.289\Delta x \implies \Delta x = \dfrac{7.5}{0.289}\approx 25.95

4 0
4 years ago
What is static electricity? explain how electrons are involved <br>please answer asap ​
anastassius [24]

Answer:

Electricity produced via friction is a development of electric charges on articles. Energizes construct when negative electrons are moved starting with one article then onto the next. The article that surrenders electrons turns out to be decidedly charged, and the item that acknowledges the electrons turns out to be contrarily charged. This can occur in a few different ways.

Explanation:

\mathrm {All, done!}

4 0
3 years ago
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