The food chain in question 1 is; Grass -> Deer -> Wolf

Nimfa-mama [501]

Radiator. A radiator puts warm air out at the top and draws in cooler air at the bottom. steaming cup of hot tea - The steam you see when drinking a cup of hot tea indicates that heat is being transferred into the air. ice melting/Ice melts because heat moves to the ice from the air

5 0

3 years ago

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When the number of turns in a solenoid and its length are both doubled, the ratio of the magnitude of the new magnetic field ins

Georgia [21]

If you double the number of turns and double the length, the value N/L remains the same and hence the magnitude of the magnetic field stays the same.

A solenoid is a device comprised of a coil of wire, the housing and a moveable plunger (armature). When an electrical current is introduced, a magnetic field forms around the coil which draws the plunger in.

The magnitude of the magnetic field in an infinite (L>>R) solenoid, is proportional to:

I*N/L

Where

I = current

N = number of turns

L = length of wire

So, if you double the number of turns and double the length, the value N/L remains the same and hence the magnitude of the magnetic field stays the same.

Learn more about solenoid here

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6 0

2 years ago

What is the resultant displacement of the two vectors below

NeX [460]

Answer:

The resultant displacement is 5.8 cm, 31° South of the West axis ⇒ 4th

answer

Explanation:

A resultant vector is the combination of two or more single vectors

If the two vectors are perpendicular, then

The magnitude of the resultant vector = $\sqrt{x^{2}+y^{2}}$ ,where

x represents the horizontal vector and y represents the vertical vector

The direction of the resultant vector is $tan^{-1}\alpha$ , where α

is the angle between the horizontal vector and the resultant vector

Vector 1 is 5 cm due to West-axis

Vector 2 is 3 cm due to South-axis

We need to find the resultant displacement of them

The West and South are perpendicular

The West is the horizontal vector and South is the vertical vector

The magnitude of the resultant displacement s is:

$s=\sqrt{(5)^{2}+(3)^{2}}$

$s=\sqrt{25+9}$

$s=\sqrt{34}=5.8$

The direction of the resultant displacement s is:

$tan^{-1}\frac{3}{5}=31$ ° south of the west (between the west and

the resultant displacement)

The resultant displacement is 5.8 cm, 31° South of the West axis

6 0

3 years ago

A force of 7.50 N is applied to a spring whose spring constant is .298 N/cm. Find it’s length

gizmo_the_mogwai [7]

Answer:

to find the length just divide 7.50 and . 298

5 0

3 years ago

Identify the forces acting on the object of interest. From the list below, select the forces that act on the piano.

bekas [8.4K]

The correct answer is the following.

The forces that act on the piano are: 2) gravitational force acting on the piano (piano's weight). 5) force of the floor on the piano (normal force). 7) force of Chadwick on the piano.

As we see in the picture that I have attached is Chadwick pushing the piano in a horizontal plane. So Chadwick is applying a force that produces an acceleration. It is his force on the piano plus the acceleration of the weight of the piano, it's a gravitational force. This is pure physics applied to an object.

5 0

3 years ago