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Tatiana [17]
3 years ago
12

how do you define two angles which will result in a range of zero for a projectile launched at an angle to the horizontal

Physics
1 answer:
Mrrafil [7]3 years ago
8 0
Oh what a sneaky problem ! 

The "range" of a projectile is how far out away from the gun it goes
before it falls to the ground.

The question is asking you:  "What angle should you aim the gun
above the horizon so that the bullet doesn't go <em>any</em> distance away
from the gun, and it hits the ground exactly where the gun is "
And there are two different answers.  Really sneaky !

Can you think of how you could fire the gun so that the bullet would
hit the ground right under the gun ?  How about pointing the gun at
the ground ... aiming 90 degrees <em>below</em> the horizon ?  That would
certainly do it.                Is there another way to do it  ?

How about aiming the gun straight up in the air ... 90 degrees <em>above</em>
the horizon ?  Then it goes up, up, up, runs out of steam, stops rising,
starts falling, comes down, down, down, and hits the ground right where
the gun was.

As long as there's no air and no wind, the two angles are +90 degrees
and -90 degrees above the horizon. 

' +90 above ' means straight up.  ' -90 above ' means straight down.

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8. John has to hit a bottle with a ball to win a prize. He throws a 0.4 kg ball with a velocity of 18 m/s. It hits a 0.2 kg bott
nasty-shy [4]

<u>Answer:</u> The ball is travelling with a speed of 5.5 m/s after hitting the <u>bottle.</u>

<u>Explanation:</u>

To calculate the speed of ball after the collision, we use the equation of law of conservation of momentum, which is given by:

m_1u_1+m_2u_2=m_1v_1+m_2v_2

where,

m_1,u_1\text{ and }v_1 are the mass, initial velocity and final velocity of ball.

m_2,u_2\text{ and }v_2 are the mass, initial velocity and final velocity of bottle.

We are given:

m_1=0.4kg\\u_1=18m/s\\v_1=?m/s\\m_2=0.2kg\\u_2=0m/s\\v_2=25m/s

Putting values in above equation, we get:

(0.4\times 18)+(0.2\times 0)=(0.4\times v_1)+(0.2\times 25)\\\\v_1=5.5m/s

Hence, the ball is travelling with a speed of 5.5 m/s after hitting the bottle.

5 0
3 years ago
"Water is absorbed in the intestine through which process"? a. simple diffusion b. active transport c. active diffusion d. facil
sdas [7]

Answer: Water is absorbed in the intestine through gradient transport. The correct option is E.

Explanation:

Absorption of water in the mammalian intestines occurs largely on the small intestine through a transport mechanism known as osmosis. Osmosis is the movement of water molecules, through a semi permeable membrane, from the region of lower solute concentration into higher solute concentration to attain an equilibrium.

For water molecules to be absorbed from the lumen into the bloodstream, it's dependent on sodium absorption. This follows the following steps:

-sodium is absorbed by co transport with glucose and amino acids.this aids to move sodium from lumen into the enterocyte.

- Rapid exportation of absorbed sodium through sodium pimps from the enterocyte.

- As sodium is pumped out of cells an osmotic gradient is formed across apical cell membrane, this helps to osmotically drive water across the epithelium. Therefore water is absorbed in the intestine through the osmotic gradient created by sodium absorption. I hope this helps. Thanks.

6 0
3 years ago
What is semiconductor device that produces electric current through the effect for which its named?
nlexa [21]

The semiconductor device that produces electric current through the effect is termed as transistor.

To find the answer, we have to know more transistor.

<h3>What is transistor?</h3>
  • Transistors come in two different types: field-effect transistors and bipolar junction transistors.
  • The formation of two p-n junctions in various configurations, such as n-p-n or p-n-p, results in bipolar junction transistors.
  • The emitter, collector, and base, or middle region, are the three areas that form in a transistor.
  • The conductivity of the field-effect transistor, which is based on the conductivity principle, can be changed by an electric field.

Thus, we can conclude that, the semiconductor device that produces electric current through the effect is termed as transistor.

Learn more about transistor here:

brainly.com/question/1345827

#SPJ4

6 0
2 years ago
Find the required answer to the following by substituting the numbers. (Bonus points for knowing the units). PLEASE ANSWER
Alex73 [517]

Answer:

a) F=ma

F=13.2×10

F=132

b) I=P/V

I=75/15

I=5

4 0
3 years ago
An open pipe, 0.29 m long, vibrates in the second overtone with a frequency of 1,227 Hz. In this situation, the fundamental freq
Andru [333]

Answer:

f = 409 Hz

Explanation:

We have,

Length of the open organ pipe, l = 0.29 m

Frequency of vibration of second overtone, f_2 = 1227 Hz

It is required to find the fundamental frequency of the pipe. For the open organ pipe, the frequency of second overtone is given by :

f_2=\dfrac{3v}{2l}

v is speed of sound

Let f is the fundamental frequency. It is given by :

f=\dfrac{v}{2l}

The relation between f and f₂ can be written as :

f_2=3f\\\\f=\dfrac{f_2}{3}\\\\f=\dfrac{1227}{3}\\\\f=409\ Hz

So, the fundamental frequency of the pipe is 409 Hz.              

6 0
3 years ago
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