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
nydimaria [60]
2 years ago
15

An electromagnet needs a magnetic metal core. To produce a magnetic field, what else is required?

Physics
1 answer:
a_sh-v [17]2 years ago
5 0

Answer:

B

Explanation:

A solenoid is the wraps of conducting wire wrapped around the metal core .

You might be interested in
List an example of each of the four classes polymers that living things make and use
slamgirl [31]


The four classes of polymers are:

1. Nucleic acids.  Examples are DNA and RNA

2. Protein. Examples are enzymes and hemoglobin

3. Carbohydrates. Examples as starch and glycogen

4. Lipids. Examples are triglycerides and phospholipids

The building blocks of nucleic acids are called bases and there are four types known as Guanine, Adenine, Thymine and Cytosine.

The building blocks of carbohydrates are glucose molecules.

The building blocks of protein are amino acids.

The building blocks of lipids are a combination of fatty acids and glycerol.

6 0
3 years ago
The magnification of a microscope is increased when_________.
azamat

Answer:

Option B

Explanation:

Magnification of Microscope is  

M = M_o \times M_e  

Mo= Magnification of objective lens and  

Me= magnification of the eyepiece.  

Both magnifications( of objective and eyepiece) are inversely proportional to the focal length.  

Magnification,  

M \propto \dfrac{1}{f}

when the focal length is less magnification will be high and when the magnification is the low focal length of the microscope will be more.

Thus. Magnification will increase by decreasing the focal length.

The correct answer is Option B

6 0
3 years ago
If a cannon is fired use a=F/m to explain what happens to the cannon and the cannonball.
Serga [27]
Im not really sure about this im stuck to

4 0
3 years ago
Read 2 more answers
According to Coulomb’s Law, the force between two charged objects is related to _____.
Natasha_Volkova [10]

Answer:

A.) the inverse of the square of the distance separating them

Explanation:

Coulombs law states that "the force of attraction between two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them."

Mathematically, F = kq1q2/r²

Where q1 and q2 are the charges

r is the distance between the charges.

According to the law, the force between two charged objects is related to the inverse of the square of the distance separating them.

5 0
3 years ago
VERY EASY QUESTION!!!!!! 20 POINTS!!!!!!!!
slamgirl [31]
C. at a science fair
4 0
3 years ago
Read 2 more answers
Other questions:
  • When you push on an object such as a wrench, a steel pry bar, or even the outer edge of a door, you produce a torque equal to th
    10·1 answer
  • A car of mass 1800 kg collides with a truck of mass 5200 kg, and just after the collision the car and truck slide along, stuck t
    7·1 answer
  • Assume each tick mark represents 1 cm. Calculate the total displacement from 0 if an object moves 3 cm to the left, then 7 cm to
    5·2 answers
  • Hi can anyone help with my two questions posted a little while ago. I need to know ASAP :)
    11·1 answer
  • Plz help I don’t understand...
    8·1 answer
  • A weight lifter raises a 1600 N barbell to a height of 2.0 meters. How much work was done? W = Fd
    13·2 answers
  • Which federal agency helps foreign governments with international conservation efforts?
    12·2 answers
  • The micrometer (1 μm) is often called the micron. (a) How many microns make up 3.0 km? (b) How many centimeters equal 3.0 μm? (c
    7·1 answer
  • A force of 10 N causes a spring to extend by 20 mm. Find: a) the spring constant of the spring in N/m​
    6·1 answer
  • Using the formula below, calculate the kinetic energy of the 6 gram stone going 10 Mph
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!