Voltage sources are used to sustain a. the flow of protons
b. chemical reactions
c. resistance
d. the movement of electric charge

Answers

Answer 1

Answer:

Answer:

d. the movement of electric charge

Explanation:

Voltage source is used to provide constant voltage difference across the ends of a given conductor where it is connected

Now when voltage source is connected across the conductor we can say that due to constant voltage difference there would be a constant current will maintain in the conductor

It is given by

$i = (\Delta V)/(R)$

now since the voltage difference and resistance both are constant so current will be same in the circuit

So here the flow of charge will remain constant due to voltage source

So correct answer would be

d. the movement of electric charge

Answer 2

Answer: the movement of electric charge

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What does the doppler effect tell astronomers about the universe

Answers

The doppler effect has red and blue shifts. A red shift means something is moving farther away, and a blue shift means it is moving closer. The universe has a red shift, and since a red shift means that it is moving farther away, this tells astronomers that the universe is still expanding.

Which statement BEST describes how the body moves?a. Skeletal muscles, which are made of fibers, nerves, and blood vessels, contract in order to make the body move.
b. Cardiac and smooth muscles are made of muscle fibers, nerves, and cartilage and are responsible for all movement in the body.
c. Smooth muscles, which are made of blood vessels, fibers, and nerves, allow for all activities that use slow-twitch muscle fibers.
d. Skeletal muscles, which are made of tendons, nerves, and fibers, line the body cavities and allow for support and movement.

Answers

Answer;

A. Skeletal muscles, which are made of fibers, nerves, and blood vessels, contract in order to make the body move.

Explanation;

Muscular tissues functions in movement and locomotion through its direct connection with the skeletal system.
Skeletal muscles are responsible for moving the body. The skeletal muscle contractions pull on tendons, which as attached to bones. When the skeletal muscle contraction causes the muscle to shorten, the bone and thus the body par will move.
Skeletal muscles also provide structural support for the entire body.

Answer:

Skeletal muscles, which are made of fibers, nerves, and blood vessels, contract in order to make the body move.

Explanation:

[01.02]The captain told the passengers that the plane is flying at 450 miles per hour. This information describes the plane's

1 velocity.
2 speed.
3 acceleration.
4 direction.

Answers

Answer : speed

Explanation :

Speed is defined as the distance travelled per unit time. It is a scalar quantity.

Velocity is displacement covered per unit time. It is a vector quantity. This means it have both magnitude as well as direction.

When captain told the passengers that the plane is flying at 450 miles per hour, then this shows the speed of plane. He is not talking about the direction in which the plane is flying.

So, this information describes the speed of plane.

Correct option is (2).

That information describes the plane's speed.
If he had also told them what direction they were flying, then
they would have been able to put the two pieces of information
together, and they would know the plane's velocity.

Help Please ! A fisherman casts his lure at an angle of 33 degrees above the horizontal. The lure reaches a maximum height of 2.3 m. Assuming no frictional forces, what was the initial velocity the fisherman gave the lure when he cast it? 12.34 m/s

28.45 m/s

34.91 m/s

21.29 m/s

Answers

The initial velocity is 12.34 m/s

Explanation:

The vertical component of the initial velocity determines the maximum height.

The formula to apply is : v²=u²+2as , where

v=y-component, final velocity = 0 m/s

u= y-component of the initial velocity = ?

s= distance traveled = 2.3 m

a=acceleration due to gravity = -9.81 m/s²

Using the values in the equation

v²=u²+2as

0²=u²+2×2.3×-9.81

0=u²-45.126

45.126=u²

√45.126= u

6.7175 m/s

The vertical component of velocity is given by;

velocity*sin(angle with horizontal)

velocity=6.7175 / sin 33°

=12.338 m/s

=12.34 m/s

Learn More

Finding Initial velocity :brainly.com/question/1858995

Keywords : angle, maximum height, initial velocity, friction

#LearnwithBrainly

physics Test 2 In a double slit experiment, if the separation between the two slits is 0.050 mm and the distance from the slits to a screen is 2.5 m, find the spacing between the first-order and second-order bright fringes when coherent light of wavelength 600 nm illuminates the slits.

Answers

Answer:0.015 m

Explanation:

Given

distance between two slits(d)=0.050 mm

Distance between slit and screen=2.5 m

Wavelength $(\lambda )=600 nm$

and distance between First order and second order $=(D\lambda )/(2d)$

$=(2.5* 600* 10^(-9))/(2* 5* 10^(-5))$

$=15* 10^(-3)$

=0.015 m

What is the main difference between primary and secondary succession?A The climax of primary succession is pine forest
B Primary succession begins with bare rocks
C Secondary succession begins with mossed and lichens
D Secondary succession include frequent fires