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3 years ago

8

TRUE OR FALSE, PLEASEE HELPPP ASAP

1 answer:

garik1379 [7]3 years ago

6 0

Answer: You do not deserve help, You dont help other people you only use them for points so...do not ask for help from us now

Explanation:

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(1 point) Answer the following questions about the sphere whose equation is given by x2+y2+z2−4x+4y=73. x2+y2+z2−4x+4y=73. 1. Fi

pychu [463]

Answer:

R=9.

C=(2,-2,0).

Explanation:

Lets try to find how $x^2+y^2+z^2-4x+4y=73$ can be written in the form of $(x-a)^2+(x-b)^2+(x-c)^2=R^2$ , since then its radius R and center of coordinates C=(a,b,c) would be easily recognizable.

Since we have the terms -4x and +4y, they seem to have come from the terms $(x-2)^2$ and $(y+2)^2$ , and we would need to take care of the extra +4 by substracting then. More explicitly:

$(x-2)^2-4=x^2-4x+4-4=x^2-4x$ , as we had originally with the x terms

$(y+2)^2-4=y^2+4y+4-4=y^2+4y$ , as we had originally with the y terms

Which means:

$x^2-4x+y^2+4y+z^2=(x-2)^2-4+(y+2)^2-4+z^2$

Or, putting all together:

$(x-2)^2-4+(y+2)^2-4+z^2=73$

$(x-2)^2+(y+2)^2+z^2=9^2$

So our radius is 9 and the center is (2,-2,0).

5 0

3 years ago

Which plate will feel stress in the form of compression?.

Nonamiya [84]

A.oceanic plate diverging

B.central fault in a continental plate

C.oceanic and continental plates at a transform boundary

D.oceanic and continental plate converging

subject science

5 0

3 years ago

In the sport of parasailing, a person is attached to a rope being pulled by a boat while hanging from a parachute-like sail. A r

Illusion [34]

Answer:

the weight of the rider is 493.53 N

Explanation:

Given the data in the question and as illustrated in the image below,

Tension T = 1900 N

the rider is moving at a constant speed so the net force in the horizontal direction will be 0

In the horizontal direction

F $_{sail$ cos( 30° ) = Tcos ( 17° )

F $_{sail$ = Tcos( 17° ) / cos( 30° )

F $_{sail$ = 1900cos( 17° ) / cos( 30° )

F $_{sail$ = 2098.07 N

Now, In the vertical direction,

F $_{sail$ sin( 30° ) = W + T sin( 17° )

W = F $_{sail$ sin( 30° ) - T sin( 17° )

W = 2098.07sin( 30° ) - 1900sin( 17° )

W = 1049.035 - 555.506

W = 493.53 N

Therefore, the weight of the rider is 493.53 N

7 0

3 years ago

A car of weight 300N moved through a distance of 10m when pushed by 3 students

Sati [7]

The work done by the three students is 3,000 J.

The energy transferred in the process is 3,000 J.

<h3>What is work done?</h3>

Work done is the product of force and distance moved by the object.

W = Fd

The work done by the three students is calculated as follows;

W = 300 x 10

W = 3,000 J

<h3>What is energy transfer?</h3>

This is means by which energy is converted from one form to another.

The energy transferred in the process is determined by work energy theorem.

E = W

E = 3,000 J

Learn more about work-energy theorem here: brainly.com/question/22236101

3 0

2 years ago

How do fluids exert pressure on a container

Lina20 [59]

Fluids are liquid or gases
different particles make up fluids and are constantly bouncing in a high random motion

8 0

3 years ago

Read 2 more answers