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Mila [183]
4 years ago
6

Consider a car that travels between points A and B. The car's average speed can be greater than the magnitude of its average vel

ocity, but the magnitude of its average velocity can never be greater than its average speed. A) True B) False
Physics
1 answer:
ryzh [129]4 years ago
4 0

Answer: A.True

Explanation: simply put the magnitude of the speed is a function of Distance while the magnitude of velocity is a function of Displacement. Displacement is the average Distance moved in different directions which will be smaller in magnitude compared to the Total Distance used the calculating the magnitude of speed.

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A dog playing fetch picks up a tennis ball that has unfortunately landed on a wasps' nest and he is stung several
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Answer:

discrimination ig

Explanation:

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3 years ago
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A transformer connected to a 120 V (rms) ac line is to supply 13,000 V (rms) for a neon sign. To reduce shock hazard, a fuse is
TiliK225 [7]

Answer with Explanation:

We are given that

V_1=120 V

V_2=13000 V

I_{2}=8.5 mA=8.5\times 10^{-3} A

1 mA=10^{-3} A

a.We know that

\frac{N_2}{N_1}=\frac{V_2}{V_1}

\frac{N_2}{N_1}=\frac{13000}{120}=108.3

b.P_{avg}=I_2V_2

P_{avg}=13000\times 8.5\times 10^{-3}=110.5 Watt

c.I_1=\frac{P_{avg}}{V_1}

I_1=\frac{110.5}{120}=0.92 A

5 0
4 years ago
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Which of the following are vector quantities? Select all that apply.
valkas [14]

Answer:

7 miles southwest

9 steps to the left

75 mph north

Explanation:

A vector quantity is any physical quantity that specifies the magnitude of the quantity and its direction.

So, the choices that gives a magnitude and direction are vectors.

The other type of physical quantities are the scalar which only specifies the magnitude but no direction;

9 steps to the left and  7 miles southwest are called displacement

75 mph north is velocity

8 0
4 years ago
Suppose two waves collide, and the temporary combined wave that results is smaller than the original waves. what term best descr
BlackZzzverrR [31]
The collision of the two waves would bring force and that would make the new wave smaller
3 0
3 years ago
if it is true that the net charge in the universe does not change, how is it ever possible to charge an object that was initiall
olga55 [171]

By transferring electrical charges from one object to another

Explanation:

The law of conservation of electric charge states that the total electric charge of the universe is constant, therefore no charge can be created or destroyed, but only transferred.

Indeed, when an object is charged, this is due to the fact that charge carriers (typically electrons) are transferred to/from the object.

Consider an object initially neutral: this means that the object has initially an equal amount of positive charges (protons) and negative charges (electron).

Later, if we remove electrons from the object, then it will remain with an excess of protons: therefore, it will be positively charged. However, the electrons have not disappeared: simply, they have been moved somewhere else (on another object, for example, which will become negatively charged: so, the total net charge will still be zero).

Similarly, if we add electrons to the object, it will become negatively charged: however, the electrons have been removed from another object which is now positively charged, so the net charge still has not changed.

Learn more about electric charges:

brainly.com/question/8960054

brainly.com/question/4273177

#LearnwithBrainly

8 0
3 years ago
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