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
Gnoma [55]
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:
bezimeni [28]3 years ago
6 0

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

Ohm's law is V=IR, or I=V/R, or R=V/I. (I= current, V= voltage, R= resistance.) Let's plug in our variables: V=12.0, I=4.0, R=? into the equation R=V/I. 12.0/4.0=3.0, so the resistance is 3.0 ohms.

You might be interested in
Using a rope that will snap if the tension in it exceeds 356 N, you need to lower a bundle of old roofing material weighing 478
klasskru [66]

Answer:

a) 2.5 m/s²

b) 6.12 m/s

Explanation:

Tension of rope = T = 356N

Weight of material = W = 478 N

Distance from the ground = s = 7.5 m

Acceleration due to gravity = g = 9.81 m/s²

Mass of material = m = 478/9.81 = 48.72

Final velocity before the bundle hits the ground = v

Initial velocity = u = 0

Acceleration experienced by the material when being lowered = a

a) W-T = ma

⇒478-356 = 48.72×a

\Rightarrow \frac{122}{48.72} = a

⇒a = 2.5 m/s²

∴ Acceleration achieved by the material is 2.5 m/s²

b) v²-u² = 2as

⇒v²-0 = 2×2.5×7.5

⇒v² = 37.5

⇒v = 6.12 m/s

∴ Velocity of the material before hitting the ground is 6.12 m/s

5 0
3 years ago
A 0.00287 C charge is 6.52 m from
yKpoI14uk [10]

Answer:

I know dude

Explanation:

-22000

7 0
3 years ago
Which is an outer planet?
saw5 [17]

Answer:

pluto

Explanation:

Dwarf because it is very minut

8 0
3 years ago
Read 2 more answers
HELLPPP NOWWA!!!!!!!!!!!!
prisoha [69]

Answer:

b

Explanation:

the gravitational pull also helps with that but

7 0
3 years ago
Read 2 more answers
FIND THE WEIGHT OF A 80 KG MAN ON THE SURFACE OF MOON? WHAT SHOULD BE HISS MASS ON THE EARTH AND ON THE MOON? (ge = 9.8 m/s2 ; g
elena55 [62]

Weight = (mass) x (acceleration of gravity at the place where the mass is) .

Man's mass = 80 kg

His weight on Earth = (80 kg) x (9.8 m/s²) = 784 newtons (about 176 pounds)

His weight on the Moon = (80 kg) x (1.63 m/s²) = <em>130.4 newtons</em> (about  29.2 pounds)

His mass is <em>80 kg</em>.  Mass is the thing about him that doesn't change. 
He has the same mass on the Earth, on the Moon, or anywhere.

8 0
3 years ago
Other questions:
  • The following is a chemical reaction for _______ with ozone.
    11·2 answers
  • How many work is done when a force of 33n pulls wagon 13meters
    5·1 answer
  • How does the nucleus of an atom change when it emits an alpha or beta particle?
    12·1 answer
  • A(n) 712 kg elevator starts from rest. It moves upward for 3.13 s with a constant acceleration until it reaches its cruising spe
    6·1 answer
  • Providing that it does not collide with another object, what is the most likely reason that an object moving through space would
    15·1 answer
  • Two trains are traveling on the same track and in the same direction. The first train, which is behind the second train, blows a
    14·1 answer
  • Which types of heat transfer involve heat flow from hot objects to colder objects? A. convection, conduction, and radiation B. c
    11·2 answers
  • Discuss what it means to view a moving objectt from a frame of reference. Supply an example that illustrates your explanation.
    7·1 answer
  • Which liquid is the most viscous?<br><br> syrup<br> water<br> milk<br> apple juice
    14·2 answers
  • A car changes its velocity from 40.0 m/s to -5.0 m/s in 5.0 seconds what was the car average acceleration
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!