Current can also be calleda. voltage.
b. electricity.
c. moving charges.
d.
b. and
c.

Answers

Answer 1

Answer: Electrical current is the flow of moving charges.

Answer 2

Answer: D. It is electricity and moving charges

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As opposed to concave lenses, which characteristic of convex lenses makes them useful in microscopes?Convex lenses can produce images larger than objects.
Convex lenses can produce upright images.
Convex lenses cause light rays to spread out.
Convex lenses cause light rays to refract

Answers

Answer: The correct answer is convex lenses can produce images larger than objects.

Explanation:

Convex lens is a type of spherical lens in which two spherical surface bulge outwards. This type of lens is known as double convex lens or simply convex lenses.

These lenses are known as converging lenses because they converge the light rays passing through it to one point. The image formed by these lens depends on the location of the object. In one case, it produces an enlarged image.

Concave lenses only produces only image which is reduced in size than the object.

In microscopes, the object used is very very small and to view its enlarged image, only convex lenses are used.

Hence, the correct answer is convex lenses can produce images larger than objects.

A.Convex lenses can produce images larger than objects.

Which statement is true for a sound wave entering an era of a warmer air ?A. The wave travels faster and with the same wavelength
B. The wavelength travels at the same speed but with an increased wavelength
C. The wave travels at the same speed and with the same wave length
D. The wave travels slower and with an increased wavelength
E. The wave travels faster and with an increased wavelength

Answers

Answer:E
Molecules at higher temperatures have more energy, thus they can vibrate faster. Since the molecules vibrate faster, sound waves can travel more quickly. Wavelength always increases with speed, as frequency is fixed at source and speed= freq x wavelength
The speed of sound in room temperature air is 346 meters per second.

Uranium 235 can be split if it is hit by: a neutron a proton an electron a neutrino

Answers

if splitting uranium 234, it's nuclear fission, right?
so neutron

this answer for this is neutron

What is produced when calcium reacts with fluorine in a synthesis reaction

Answers

Calcium fluoride is produced. It is one Calcium atom bonded to two fluoride atoms. The Calcium atom receives one electron from one fluoride and a second electron from the second fluoride atom. As a result of receiving the two electrons, Calcium will have a negative charge. The two fluorides become positive from losing an electron. The positive and negative charge attraction keeps the atoms close together to form an ionic bond.

When two point charges are a distance d apart, the magnitude of the electrostatic force between them is F. If the distance between the point charges is increased to 3d, the magnitude of the electrostatic force between the two charges will be

Answers

Answer:

The magnitude of the electrostatic force decreases by a factor 9

Explanation:

The electrostatic force between two charges is given by:

$F=k(q_1 q_2)/(d^2)$

where

k is the Coulomb's constant

q1 and q2 are the two charges

d is the distance between the two charges

We see that the magnitude of the force is inversely proportional to the square of the distance. If the distance is increased to 3d: d' = 3d, the new electrostatic force would be:

$F'=k(q_1 q_2)/((d')^2)=k(q_1 q_2)/((3d)^2)=(1)/(9) k(q_1 q_2)/(d^2)=(F)/(9)$