1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
faltersainse [42]
3 years ago
5

The unit used to measure electric current is the ampere (AA). Now, assume that the current delivered at a wall socket reaches th

e value 3.8 AA ten times in a time interval of 0.17 ss. What is the period TTT with which the current at the wall socket changes?
Physics
1 answer:
Lostsunrise [7]3 years ago
8 0

The period T with which the current at the wall socket changes is 0.017 s.

It also ranges from 0.155 s to 0.0189 s since the cycles is not given in the question.

<u>Explanation</u>:

The current reaches 3.8 A once for every cycle. So there must have been 10 cycles (10 periods) in 0.17 s.  

Using 'T' for period:

                                10 T = 0.17  

                                      T = 0.17 / 10  

                                     T  = 0.017 s.

The question doesn't tell about the cycles and so we assume it as 10 cycles. If there are 9 cycles due to the current 3.8 A at the exact beginning and end of 0.17 s. This would make the period T as

                              0.17 / 9 = 0.0189 s approx.

Likewise, if the 3.8 A occurs at the end of the 1st cycle, 11 cycles would have passed during 0.17 s.

In that case the period = 0.17 / 11 = 0.155 s approx.

So T could be in the range from 0.155 s to 0.0189 s.

You might be interested in
A certain heat engine takes in 300 J of energy from a hot source and then transfers 200 J of that energy to a colder object. Wha
Greeley [361]

Answer:

The efficiency is 0.33, or 33%.

Explanation:

From the thermodynamics equations, we know that the formula for the efficiency of a heat engine is:

\eta=1-\frac{Q_2}{Q_1}

Where η is the efficiency of the engine, Q_1 is the heat energy taken from the hot source and Q_2 is the heat energy given to the cold object. So, plugging the given values in the formula, we obtain:

\eta=1-\frac{200J}{300J}=0.33

This means that the efficiency of the heat engine is 0.33, or 33% (The efficiency of an engine is dimensionless).

5 0
3 years ago
Please follow my sis on i.n.s.t.a.g.r.a.m Id - tehzz_13
Alisiya [41]

Answer:

Explanation:

ok

4 0
2 years ago
A sling psychrometer works because the amount of cooling that occurs in the wet bulb is directly proportional to the ----- of th
ad-work [718]
<u>Temperature of the air</u>

According to sources, the most probable answer to this query is that the wet bulb is directly proportional to the temperature of the air. Thank you for your question. Please don't hesitate to ask in Brainly your queries. 
5 0
3 years ago
A phone cord is 4.89 m long. The cord has a mass of 0.212 kg. A transverse wave pulse is produced by plucking one end of the tau
slega [8]

Answer:

Tension in Cord=174 N

Explanation:

Given Data

L (Phone Cord Length)=4.89 m

m (Cord Mass)=0.212 Kg

T (Time for four trips)=0.617 s

Tension=?

Solution

V=λ×f

V=\frac{8*4.89}{0.617}\\ V=63.4m/s

Sigma=\frac{mass}{length}\\ Sigma=\frac{0.212}{4.89}\\ Sigma=0.0433 \frac{kg}{m}

Wave Speed=\sqrt{\frac{Tension}{Sigma} }\\ \\V=\sqrt{\frac{T}{Sigma} }\\ V^{2}=\frac{T}{Sigma}\\  T=V^{2}*Sigma\\ T=(63.4)^{2}*(0.0433)\\ T=174 N

5 0
3 years ago
A child is sledding. He starts at the top of the hill with a velocity of zero, and 3 seconds later he is speeding down the hill
Flauer [41]

Magnitude of acceleration = (change of speed) / (time for the change) =

                                             (12 m/s  -  0)   /   (3 sec)  =

                                               12/3  =  <em>4 m/s²</em>

What's a challenge question ?  Have we all passed the event horizon
and been spaghettified without knowing it ?


8 0
3 years ago
Other questions:
  • Which of these toy trains has the slowest speed?
    10·1 answer
  • 32. Only a small percentage of the energy
    13·1 answer
  • Consider the interactions involved when you use a TV remote control to change the channel. Classify each interaction as long ran
    11·1 answer
  • When finding the upper bound of the density, you put what number in the denominator?
    7·1 answer
  • A 9-μC positive point charge is located at the origin and a 6 μC positive point charge is located at x = 0.00 m, y = 1.0 m. Find
    7·1 answer
  • I need help on this
    11·1 answer
  • If a small asteroid named ‘B612’ has a radius of only 20 m and mass of
    7·1 answer
  • Set up differential equation of angular S.H.M​
    5·1 answer
  • A driver entering the outskirts of a city takes her foot off the accelerator so that the car slows down from 90 km/h to 50 km/h
    13·1 answer
  • A generator produces 38 mwmw of power and sends it to town at an rms voltage of 78 kvkv. part a what is the rms current in the t
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!