An electromagnetic wave is composed of electrical and magnetic energy. true or false

Answers

Answer 1

Answer: it is false it is a metle core

Related Questions

A bulldozer does a work of 50,000 Joules to move a boulder through a distance of 15m. how much force is applied to move the boulder
In a cathode ray tube, the number of electrons that reach the fluorescent screen is controlled by the A. cathode.B. grid.C. anode.D. deflecting plate.
What kinds of bonds can happen between the elements of a compound
ALWAYS use significant figure rules. Remember that these rules apply to all numbers that are measurements.A caterpillar tries to climb straight up a wall two meters high, but for every 2 cm up it climbs, it slides down 1 cm. Eventually, it reaches the top. When it reaches the top, it does not pull itself over so it will slide down 1 cm. At this point, the caterpillar was exhausted and fell to the ground. What is the total displacement?0 up0 down0 n/a199 up199 down199 n/a200 up200 down200 n/a
A 3.7 kg object is lifted to a Hight of 3 meters what is the potential energy of this object

Scientists use different types of microscopes to observe objects that are not visible to the naked eye. A scientist is reviewing various samples of pond water to determine what species of microorganisms live in the pond. The scientist wishes to make drawings of the structure of each microorganism and study each one's method of movement. Which of the following microscopes would be best for the scientist to use?a.

transmission electron microscope

b.

scanning electron microscope

c.

compound light microscope

d.

dissecting microscope

Answers

A compound light microscope is the correct answer. Compound light microscopes provide a clear picture of many microorganisms, such as protozoans, and are used to view their structures and movements. Often, in the field of Microbiology, compound light microscopes are used for observing living microorganisms.

Answer;

-Compound light microscope

Explanation;

-A compound microscope is a microscope that uses multiple lenses to enlarge the image of a sample. It is commonly used for viewing samples at high magnification (40 - 1000x), which is achieved by the combined effect of two sets of lenses: the ocular lens and the objective lenses.

-Compound microscopes usually include exchangeable objective lenses with different magnifications (e.g 4x, 10x, 40x and 60x), mounted on a turret, to adjust the magnification. These microscopes also include a condenser lens and iris diaphragm, which are important for regulating how light hits the sample.

The least common shape for a galaxy is ______. irregular elliptical cluster spiral spherical

Answers

Answer: cluster

Explanation:

There are four main shapes of galaxies: spiral, galaxies are divided into four main groups: spiral, lenticular, elliptical, and irregular, elliptical, and irregular.

The least common shape is cluster

Spiral galaxies- These are the most common. These have arms extending from a bright bulge in spiral shape.

Elliptical galaxy have ellipsoidal shape.

Lenticular galaxies - Intermediate between elliptical and spiral galaxies.

Irregular shape- No well defined shape

Spherical - Nearly spherical galaxies. These are least

cluster- group of galaxies having irregular shape is the least common shape.

Question: The least common shape for a galaxy _____.

Answer:Cluster

What fuels could you use to create a fire? Also, why would it be useful to light a fire if you were shipwrecked. Thank you very much ♥ ☺

Answers

You could use wood, leaves, twigs, or branches. You could also use stones to make or start a fire by rubbing them together. It would be useful if you were shipwrecked because someone might see your fire then and see that you needed help. It could also keep you warm.

What is the definition for distance?

Answers

distance is an amount of space between two things or people

Why is Gregor Mendel's research the field of genetics

Answers

Answer:

He studies genetics and found out how reproduction and genetics work together.

Explanation:

The potential energy of a catapult was completely converted into kinetic energy by releasing a small stone with a mass of 20 grams. The velocity of the stone when it reached the target was 15.0 meters/second. What was the value of the kinetic energy of the stone when it reached the target?

Answers

Answer: 2.25 J

Explanation: Kinetic energy is the energy possessed by an object by virtue of its motion.

$K.E=(1)/(2)* mv^2$

m= mass of object= 20 g = 0.02 kg (1 kg= 1000 g)

v= velocity of object= 15 m/s

$K.E=(1)/(2)* 0.02* 15^2=2.25kgm^2s^(-2)=2.25J$

$(1J=1kgm^2s^(-2))$

1,000 grams = 1 kilogram
20 grams = 0.02 kilogram

Kinetic energy = (1/2) (mass) x (speed)²

(1/2) (0.02) x (15)² =

(0.01) x (225) = 2.25 joules

Other Questions

if 15 N of force are applied to a cart to move it a distance of 5m, how much work is done on the cart

Which of the following could classify as a non-essential need according to the hierarchy of needs? A. healthy food B. human contact C. more sleep D. new clothes

A particle has a charge of +1.5 µC and moves from point A to point B, a distance of 0.15 m. The particle experiences a constant electric force, and its motion is along the line of action of the force. The difference between the particle's electric potential energy at A and B is EPEA - EPEB = +9.0 10-4 J. (a) Find the magnitude and direction of the electric force that acts on the particle. _______N the direction of motion (along, against, perpendicular) (b) Find the magnitude and direction of the electric field that the particle experiences. _______N/C the direction of motion (along, against, perpendicular)

What is the molar mass, in grams, of a mole of an element equal to?A. The number of electrons B. The atomic weight of the element C. The atomic number of the element D. The number of neutrons in the element