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WARRIOR [948]
3 years ago
12

Please answer asap its 4:45p m right now and i wanna get done with science class lol and i need help because im a bit confused.

:)
1C. What is the goal of technology? Explain how a toothbrush achieves this goal

2A. Compare science and technology.
2B. Is a human leg prosthesis an example of science or technology?
2C. Explain how both science and technology must have been involved in the development of a leg prosthesis.

3A. List the positive consequences of using pesticides. then list the negative consequences.
3B. Explain the following statement, "Technology does not provide perfect solutions to problems." use pesticides as an example.

Please give me a real answer, because I have 1 brain cell lol and I really need help :')
Physics
1 answer:
n200080 [17]3 years ago
5 0

1c. The goal of technology is to improve how people live. For example a toothbrush helps prevent cavities and buildup on our teeth.

2a. Science and technology both help improve our lives. Science gives us the knowledge we need to create technology.

2b. A human prosthetic is an example of technology.

2c. Prosthetics are created though scientific study and research. Technology is used to create the material prosthetics are made of and to help design the prosthetics.

3a. Benefits of pesticides: Keeps bugs away from crops, higher crop yields.

Negatives:

pollution, harmful to health

I got all of them except the last one

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A leaf floating down from a tree is an example of an object in free fall.<br> A. True<br> B. False
BlackZzzverrR [31]

Answer:

its false

Explanation:

because if an leaf floats down from a tree it is not considered an object for a free-fall

4 0
3 years ago
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What is required for the maximum high tide to occur?.
daser333 [38]

Answer:

Tides are very long waves that move across the oceans. They are caused by the gravitational forces exerted on the earth by the moon, and to a lesser extent, the sun. ... Because the gravitational pull of the moon is weaker on the far side of the Earth, inertia wins, the ocean bulges out and high tide occurs.

Explanation:

4 0
2 years ago
A solid conducting sphere of radius 2.00 cm has a charge of 8.84 μC. A conducting spherical shell of inner radius 4.00 cm and ou
AlladinOne [14]

Answer: The electric field is given in three regions well defined; 0<r<2; 2<r<4; 4<r<5 and r>5

Explanation:  In order to solve this problem  we have to use the gaussian law in the mentioned regions.

Region 1; 0<r<2

∫E.ds=Qinside the gaussian surface/ε0

inside of the solid conducting sphere the elevctric field is zero because the charge is located at the surface on this sphere.

Region 2; 2<r<4;

E.4*π*r^2=8,84/ε0

E=8,84/(4*π*ε0*r^2)

Region 3; 4<r<5

E=0 because is inside the conductor.

Finally

Region 4; r>5

E.4*π*r^2=(8,84-2.02)/ε0

6 0
3 years ago
A mass of 150 g stretches a spring 1.568 cm. If the mass is set in motion from its equilibrium position with a downward velocity
nadezda [96]

Answer:

u(t)=\frac{1}{5} sin\ (25t)

Explanation:

Given:

  • mass of the body stretching the spring, m=150\ g
  • extension in spring, \Delta x=1.568\ cm
  • velocity of oscillation, u'(0)=20\ cm.s^{-1}
  • initial displacement position of equilibrium, u(0)=0

<u>According to given:</u>

m.g=k.\Delta x

150\times 980=k\times 1.568

k=93750\ dyne.cm^{-1}

<u>we know frequency:</u>

\omega=\sqrt{\frac{k}{m} }

\omega=\sqrt{\frac{93750}{150} }

\omega=25

Now, for position of mass in oscillation:

u= A.sin\ (\omega.t)+B.cos\ (\omega.t)

u= A.sin\ (25.t)+B.cos\ (25.t)

at t=0;\ u(0)=0\ \Rightarrow A=0

∴u(t)=B.sin\ (25.t)

∵ at t=0;\ u'(0)=20\ cm.s^{-1}\ \Rightarrow B=\frac{1}{5}

u(t)=\frac{1}{5} sin\ (25t)

7 0
3 years ago
What is the average speed of a car that traveled 300.0 miles in 5.5 hours?
Pavlova-9 [17]
<span>i think the average speed was 54.54 (mph)</span>
7 0
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