PHYSICS HIGH SCHOOL

A current carrying wire wrapped around an iron ore is called a(n) ____. generator

conductor

transformer

electromagnet

Answers

Answer 1
Answer: I believe the correct answer from the choices listed above is the last option. A current carrying wire wrapped around an iron ore is called an electromagnet. They are usually consist of a large number of closely spaced turns of wire that create the magnetic field. Hope this answers the question.

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Which of the following is not a reason fluorescent lamps are advantageous over incandescent lamps? A. Fluorescent lamps are more efficient than incandescent lamps.
B. Fluorescent lamps operate at a higher temperature than incandescent lamps.
C. Fluorescent lamps dissipate more energy as light instead of heat than incandescent lamps.
D. Fluorescent lamps produce light with less glare than incandescent lamps.

Answers

Answer;

B. Fluorescent lamps operate at a higher temperature than incandescent lamps.

Explanation;

-A fluorescent lamp, is a type of electric light (lamp) that uses ultraviolet emitted by mercury vapor to excite a phosphor, which emits visible light.

-A fluorescent lamp produces less heat, thus, it is much more efficient. A fluorescent bulb can produce between 50 and 100 lumens per watt. This makes fluorescent bulbs four to six times more efficient than incandescent bulbs.

-Fluorescent lamps operate best around room temperature. At much lower or higher temperatures, efficacy decreases.
The right answer for the question that is being asked and shown above is that: "C. Fluorescent lamps dissipate more energy as light instead of heat than incandescent lamps." This is not a reason fluorescent lamps are advantageous over incandescent lamps.

A standing wave has a frequency of 471 Hz and a wavelength of 1.9. What is the speed of thewave? (Round to the 2nd number after the decimal)
1
I REALLY NEED HELP !

Answers

Answer:

c = 894.90 m/s

Explanation:

Given data:

Frequency of wave = 471 Hz

Wavelength of wave = 1.9 m

Speed of wave = ?

Solution:

Formula:

Speed of wave = frequency × wavelength

c = f×λ

c = 471 Hz × 1.9 m

  Hz = s⁻¹

c = 471s⁻¹ × 1.9 m

c = 894.90 m/s

The speed of wave is 894.90 m/s.

A 3.8 kg object is lifted 12 meters. approximately how much work is performed during the lifting?

Answers

Work done is  equivalent to potential energy.

W = mgh.              m is mass in kg, g is acceleration due to gravity = 9.81 m/s², h is height = 12 m

     =  3.8 * 9.81 * 12

     = 447.336 Joules 

W = mgh.

m is mass in kg,

g is acceleration due to gravity = 9.81 m/s²,

h is height = 12 m

= 3.8 * 9.81 * 12

= 447.336 Joules

A 10 kg bowling ball would require what force to accelerate down an alleyway at a rate of 3 m/s2? F=
M=
A=

Answers

The force to accelerate down an alley way will be "30 N".

In the given question, the values are:

Mass,

  • m = 10 kg

Acceleration,

  • a = 3 m/s²

As we know the formula for finding the force will be:

→ Force = Mass* Acceleration

or,

→       F = m* a

By putting the given values in the formula, we get

→           = 10* 3

→           = 30 \ N

Thus the above answer is correct.  

Learn more about mass here:

brainly.com/question/12195736

Hello!

A 10 kg bowling ball would require. What force to accelerate down an alleyway at a rate of 3 m/s²  ?

We have the following data:

F (force) = ? (in N or kg.m/s²)

m (mass) = 10 kg

a (acceleration) = 3 m/s²

We apply the data to the Net force formula, we have:

F =m*a

F = 10\:kg * 3\:(m)/(s^2)

F = 30\:kg*(m)/(s^2) \to \boxed{\boxed{F = 30\:N}}\:\:\:\:\:\:\bf\green{\checkmark}

Answer:

The force is 30 Newton

______________________

\bf\purple{I\:Hope\:this\:helps,\:greetings ...\:Dexteright02!}\:\:\ddot{\smile}

What type of force cause an object to accelerate??

Answers

ANY force causes an object to accelerate, just as long as there are not
some other forces on the object that cancel out the first one.

Are you looking for the answer ... an "UNBALANCED" force ?
That's a very poor way to describe it, because there's no such thing
as a balanced or unbalanced force.  The thing that's balanced or
unbalanced is a GROUP of forces, not a single force.

Q2. Zara travelled in a train moving at an average speed of 120km/h and covered a distance of 40km towards East. Calculate the time taken by the train to cover this distance.

Answers

Answer: 20 minutes

Explanation:

Given the following :

Average speed of train = 120km/hr

Distance = 40km.

The time take by the train moving at an average speed of 120km/hr to cover a distance of 40km due is ;

Recall:

Speed = distance / time

Therefore,

Time taken = distance covered / speed

Time taken = 40km / 120km/hr

Time taken = 1/ 3 hr

Therefore, 1/3 rd of an hour equals

1/3 × 60 = 20 minutes.

Time taken) 20 minutes

Time taken by tain to cover distance is 20 minutes as:

Distance= 40 km

Speed= 120 km/h

Time= distance/speed

= 40/120

= 1/3 hour

= 20 min

or  =0.33 hrs

To know more about' Time and Speed 'visit:

brainly.com/question/28735144
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