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GREYUIT [131]
4 years ago
15

Two circuits, one series and one parallel, use light bulbs to provide resistance. Both circuits have the same number of light bu

lbs,
A.
and the resistance is the same in both circuits.
B.
but the resistance is lower in the parallel circuit.
C.
but only the series circuit has any resistance.
D.
but the resistance is higher in the parallel circuit.
Physics
1 answer:
SashulF [63]4 years ago
4 0

Answer: B. 

but the resistance is lower in the parallel circuit.

Explanation:

A circuit with parallel connections has a lower total resistance than the resistors connected in series. This is consistent with conservation of charge. The power dissipated by each resistor  is considerably higher in parallel than when connected in series to the same voltage source.

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A paintball is shot horizontally in the positive x direction at time t after the ball is shot it is 4 cm to the right and 4 cm b
Artist 52 [7]

<u>Answer:</u>

At time 2t the paint ball is at 8 cm to the right and 16 cm to the bottom

<u>Explanation:</u>

 We have equation of motion , s= ut+\frac{1}{2} at^2, s is the displacement, u is the initial velocity, a is the acceleration and t is the time.

Considering the horizontal motion of paint ball

    Distance traveled during time t = 4 cm

    Initial velocity = u m/s

   Acceleration = 0 m/s^2

So 4 = u*t+\frac{1}{2} *0*t^2\\ \\ u = \frac{4}{t}

Now at time 2t,

  S= u*2t+\frac{1}{2} *0*(2t)^2\\ \\=\frac{4}{t} *2t\\ \\ =8cm

  So horizontal distance traveled in time 2t = 8 cm to the right

Now considering the vertical motion of paint ball

  Distance traveled during time t = 4 cm

    Initial velocity = 0 m/s

   Acceleration = -g m/s^2

4=0*t-\frac{1}{2} *g*t^2\\ \\ t^2=\frac{-8}{g}

At time 2t,

     S=0*2t-\frac{1}{2} *g*(2t)^2\\ \\ =-\frac{1}{2} *g*4*\frac{-8}{g}\\ \\ =16 cm

 So vertical distance traveled in time 2t = 16 cm to the bottom

 

6 0
3 years ago
A car starts from rest and after 10 seconds is traveling at 20 m/s. Assuming that it continues to accelerate at the same rate it
Alenkinab [10]

Assuming that it continues to accelerate at the same rate it will take another 10 seconds to reach 40 m/s.

Answer:

Explanation:

Since the first question states that there is a change in the velocity from rest to 20 m/s in 10 seconds time interval. So the acceleration experienced by the car during this 10 seconds should be determined first as follows:

Acceleration = (final velocity-initial velocity)/Time

Acceleration = (20-0)/10 = 2 m/s².

So this means the car is traveling with an acceleration of 2 m/s².

As it is stated that the car continues to move with same acceleration, then in the second case, the acceleration is fixed as 2 m/s², initial velocity as 20 m/s and final velocity as 40 m/s. So the time taken for the car to reach this velocity with the constant acceleration value will be as follows:

Time = Change in velocity/Acceleration

Time = (40-20)/2 = 20/2=10 s

So again in another 10 seconds by the car to reach 40 m/s from 20 m/s. Similarly the car will take a total of 20 seconds to reach from rest to 40 m/s value for velocity.

5 0
4 years ago
Ordinarily, material presented ________ is usually the most difficult to remember due to interference
Brums [2.3K]

Memorizing items on a list are enabled by the effects of primacy and

recency.

Ordinarily, material presented <u>in the middle of a list </u> is usually the most

difficult to remember due to interference.

Reasons:

When memorizing a list of items, due to the primacy effect, the information

at the beginning of the list are given importance, in the brain, due to their

many attributes, which may be due to them being;

  • The first item
  • Definition of the task (assignment of importance level)
  • Idea of what to expect (preparation of the mind)

Also the last items on the list are recalled by the effect known as recency,

which is probably due to the tendency to store items in the short term

memory.

Therefore, in the course of memorizing a list,  the first items on the list can

be stored in the long-term memory. The items that comes last in the

list are stored in the short-term memory, while the material presented in

the middle of the list are not allocated to a storage, and are usually

the most difficult to remember due to interference, by other items that

tend to come up during the retrieval process, from the long-term memory.

<em>(Rearranging the list can aid total recall)</em>

<em />

<em />

Learn more here:

brainly.com/question/15180534

<em>The possible question options as obtained from a similar question online, are;</em>

  • <em>At the beginning</em>
  • <em>Last</em>
  • <em>At the end</em>
  • <em>In the middle of a list</em>
5 0
2 years ago
An increase in the entropy of a system can be described as an increase in the total amount of _____ of a system.
fredd [130]

An increase in the entropy of a system can be described as an increase in the total amount of disorder in a system.

Entropy

Entropy is a measurable physical characteristic and a scientific notion that is frequently connected to a condition of disorder, unpredictability, or uncertainty. From classical thermodynamics, where it was originally recognized, through the microscopic description of nature in statistical physics, to the fundamentals of information theory, the phrase and concept are utilized in a variety of disciplines. It has numerous applications in physics and chemistry, biological systems and how they relate to life, cosmology, economics, sociology, weather science, and information systems, especially the exchange of information. 

To learn more about entropy refer here:

brainly.com/question/13146879

#SPJ 4

6 0
1 year ago
Find by means of a vector diagram the resultant of two forces of 7N and 3N acting at right angle to one another​
melisa1 [442]

Answer:

Image result for Find by means of a vector diagram the resultant of two forces of 7N and 3N acting at right angle to one another​

The resultant of two forces of 7N and 3N acting at a right angle to one another is √58 N. Explanation: Let the magnitude of the force of 7N be denoted as “F₁” on the x-axis and the magnitude of the force of 3N be denoted as “F₂” on the y-axis.Oct 22, 2019

Explanation:

6 0
3 years ago
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