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
klasskru [66]
3 years ago
7

1.D 2.A 3.A 4.im not sure please help 5.false One light bulb in a string of lights goes out. This causes all of the other lights

in the string to also go out. This is an example of a
A. resistor. B. parallel circuit. C. closed circuit. D. series circuit. 2.When a switch is turned from the off to the on position, it is changing the circuit in which of the following ways?
A. An open circuit is being changed into a closed circuit.
B. A closed circuit is being changed into an open circuit.
C. A parallel circuit is being changed into a series circuit.
D. A series circuit is being changed into a parallel circuit.
3.Early telephone poles had wires that connected inside bell-shaped glass enclosures like the ones shown below.
several bell-shaped glass enclosures These glass enclosures helped to keep the electric current from moving outside the circuit of wires. The glass enclosures were used as
A. insulators. B. conductors. C. resistors. D. switches. 4.Use Ohm’s Law to determine the resistance in a circuit if the voltage is 12.0 volts and the current is 4.0 amps.
A. 8.0 ohms B. 48 ohms C. 3.0 ohms D. 12 ohms 5.In a closed circuit, the current only flows from the power source to an electrical device such as a lamp
A.TRUE B.FALSE
Physics
1 answer:
Amiraneli [1.4K]3 years ago
6 0
Welll ... if you read the question, you'll see what a jumbled mess you actually
posted, but I think I can pull enough out of it to give you some answers.

<span>One light bulb in a string of lights goes out. This causes all of the
other lights in the string to also go out. The entire string of lights
must be one series circuit.

2.  When a switch is turned from the off to the on position,
an open circuit is changed to a closed circuit.

3.Early telephone poles had wires that connected inside bell-shaped
glass enclosures like the ones shown below.  (nothing is shown below)
several bell-shaped glass enclosures
These glass enclosures helped to keep the electric current from moving
outside the circuit of wires. The glass enclosures were used as insulators.

4.Use Ohm’s Law to determine the resistance in a circuit if the
voltage is 12.0 volts and the current is 4.0 amps.

Ohms law:        Resistance = (voltage) / (current)

                                             = (12.0 v) / (4.0 amp)

                                             =      3 ohms .

5.  "In a closed circuit, the current only flows from the power source
to an electrical device such as a lamp."

This statement is false.  The current eventually has to get back
to the power source.  If it doesn't then there's no 'circuit', and
nothing works.  That's a big part of the reason why the plug
has 2 prongs on it, and the cord from the plug to the lamp
has 2 wires in it. </span>
You might be interested in
a 4kg metal block absorbs 5000j of energy and increases to a temperature of 22°c. the metal has a specific heat capacity of 250j
e-lub [12.9K]

Answer:

17 °C

Explanation:

From specific Heat capacity.

Q = cm(t₂-t₁)................. Equation 1

Where Q = Heat absorb by the metal block, c = specific heat capacity of the metal block, m = mass of the metal block, t₂ = final temperature, t₁ = Initial temperature.

make t₁ the subject of the equation

t₁ = t₂-(Q/cm)............... Equation 2

Given: t₂ = 22 °C, Q = 5000 J, m = 4 kg, c = 250 J/kg.°c

Substitute into equation 2

t₁ = 22-[5000/(4×250)

t₁ = 22-(5000/1000)

t₁ = 22-5

t₁ = 17 °C

6 0
3 years ago
A 50-kg block is at rest on a 15o slope. A force of 250 N is acting on the block up the slope parallel to it. If the block does
Iteru [2.4K]

The minimum value of the coefficient of static friction between the block and the slope is 0.53.

<h3>Minimum coefficient of static friction</h3>

Apply Newton's second law of motion;

F - μFs = 0

μFs = F

where;

  • μ is coefficient of static friction
  • Fs is frictional force
  • F is applied force

μ = F/Fs

μ = F/(mgcosθ)

μ = (250)/(50 x 9.8 x cos15)

μ = 0.53

Thus, the minimum value of the coefficient of static friction between the block and the slope is 0.53.

Learn more about coefficient of friction here: brainly.com/question/20241845

#SPJ1

6 0
2 years ago
Which statement correctly explains molecular motion in different states of matter using the kinetic theory?
Gelneren [198K]

the answer is the second one

8 0
3 years ago
A person is in a room whose walls are maintained at a temperature of 17 °C. The temperature of the person’s skin is 32 °C. The s
lbvjy [14]

Answer:

sned me short notes of Physics of all branches (post graduation level) thanks  

+923466867221

Explanation:

4 0
3 years ago
What is thermal conductivity?
Vladimir79 [104]
Thermal conductivity is the ability of a material to conduct heat.
hope this helped:)
3 0
3 years ago
Other questions:
  • A person can jump 1.5m on the earth. How high could the person jump on a planet having the twice the mass of the earth and twice
    13·2 answers
  • Which of the following phrases defines the angle of refraction?
    13·2 answers
  • Sir William Herschel counted the number of stars in different directions, and getting similar numbers in each direction along th
    12·1 answer
  • 1. If the strength of the magnetic field at B is 3 units, the strength of the magnetic field at A is _____.
    13·1 answer
  • What happened to the sedimentary rock layers that first formed over the ancient rock
    8·1 answer
  • Bacteria prefer a dry environment to a damp or moist environment. False True
    9·2 answers
  • Can anyone solve this numerical<br><br><br><br><br><br> Answer is 2ohms
    5·1 answer
  • If a ball dropped from a tower reaches the ground after 3.5 seconds, what is the height of the tower? Given: g = –9.8 meters/sec
    14·1 answer
  • Melting Point of Substances
    14·2 answers
  • What is another word that can be used to describe the position of the<br> object?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!