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
Free_Kalibri [48]
4 years ago
11

What do these circuits all have in common? A. They all contain switches. B. They are all AC. C. They are all DC. D. They all con

tain resistors.
Physics
1 answer:
I am Lyosha [343]4 years ago
8 0

Answer:

A

Explanation:

You might be interested in
A Russian athlete lifts 300kg to a height of 2.5 m in 2 seconds. What is the work done? And what power is exerted?
snow_tiger [21]
We want to find the work done and power exerted, let’s start with work first.

We know that the equation for work is: W = F * D. We need to find the force which we can find by using: F = M * A.

Mass: 300kg
Acceleration (using equation from photo): 1.25 m/s^2

(The equation says x but can be used with y values)

If you are confused about how I found the acceleration; I plugged in 2.5 for the final y value, 0 for the initial y value, 0 for the initial velocity and 4 for t squared.

To solve, for acceleration it’s a matter of simple algebra. You can subtract the initial y position and the initial velocity from the final y position because they are 0. This leaves you with 2.5 m = 1/2a * t^2, from here I multiplied 2.5 by 2 to get rid of the 1/2. Now I have 5 = a * t^2. T^2 is just 2 squared, so four. Simply divide 5 by 4, and boom, you get 1.25 m/s^2.

Force = 300 kg * 1.25 m/s^2 = 375 Newtons

So, work = 500 N * 2.5 m = 1000 Joules

Power: W/t

So, Power = 1000 J / 2 seconds = 500 Watts

Hope this helps!

5 0
3 years ago
The automobile has a weight of 2700 lb and is traveling forward at 4 ft>s when it crashes into the wall. If the impact occurs
alex41 [277]

Answer:

F_b=153918\, lb.ft.s^{-2}

Explanation:

Given:

mass, m=2700 \,lb

time, t=0.06\,s

velocity, v=4\,ft.s^{-1}

coefficient of kinetic friction between wheels & pavement, \mu=0.3

According to first condition,

F\times \Delta t=m\times v

F\times 0.06= 2700\times 4

F=180000\,lb.ft.s^{-2}

According to second condition,

<u>Magnitude of frictional force (which acts opposite to the direction of motion):</u>

f=\mu.N

where N is the normal reaction.

f=0.3\times 2700\times 32.2

f=26082 \,lb.ft.s^{-2}

Now, the impulsive force on the wall if the brakes were applied during the crash:

F_b= F-f

F_b=180000-26082

F_b=153918\, lb.ft.s^{-2}

3 0
4 years ago
Is a solid PETROLEM
bearhunter [10]
No petroleum is a liquid
3 0
3 years ago
Read 2 more answers
Instrument used to measure capacity​
Andre45 [30]

Answer:

measuring cup

The most popular tool used to measure capacity is the measuring cup.

6 0
3 years ago
Read 2 more answers
Show that a directed multigraph having no isolated vertices has an euler circuit if and only if the graph is weakly connected an
sergeinik [125]
If we let
p as the directed multigraph that has no isolated vertices and has an Euler circuit
q as the graph that is weakly connected with the in-degree and out-degree of each vertex equal

The statement we have to prove is
p ←→q (for biconditional)
Since
p → q (assuming that p is strongly connected to q)
q ← p (since p is strongly connected to q)
Therefore, the bicondition is satisfied
5 0
3 years ago
Other questions:
  • How is a crowbar used to remove the top of a box change the direction of the force
    5·1 answer
  • Determine the magnitude of the acceleration for the speeding up phase.
    13·1 answer
  • Write each vector in component form<br><br> lal= 11, 315 degrees
    11·1 answer
  • Pluto has a shape that is nearly round, and it orbits the Sun. It has five known moons. Why is it called a dwarf planet and not
    6·1 answer
  • Why do we consider space to be a vacuum? Predict results if the experiment were preformed in a vacuum.
    9·1 answer
  • What would happen if an electron was added to an atom
    14·1 answer
  • DOES IT MATTER HOW WE TRAIN OUR MUSCLE
    6·1 answer
  • Gene therapy has been used to treat and cure cystic fibrosis. Cystic fibrosis is caused by a
    10·2 answers
  • You have a 12 volt battery and placed across a 6 ohm resistor, what will the current be?​
    12·2 answers
  • What type of particle carries an electric current through a wire? Voltage is another name for the __________ difference. What wo
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!