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trasher [3.6K]
3 years ago
8

(Tennis)

Physics
1 answer:
GrogVix [38]3 years ago
4 0
A) A service winner; the opponent cannot return the serve

B) A tennis stroke made across the body with the back of the hand facing the direction of the stroke

C) Exercising to increase stamina; mostly associated with aerobic activities and cardiovascular health

D) When the ball does not land in the service box

E) Is the absolute range of movement in a joint or series of joints and muscles

F) A stroke done to the right-front of the body (for right-handers), with the racket in a normal position (palm of hand facing opponent)

G) When the service hits the net and lands in a let is played and the server gets another ball

H) A sequence of shots within a point

I) Position facing the net. Used to begin most tennis strokes

J) The way the game begins. Governed by a specific set of rules

K) A tennis stroke that creates a backspin on the ball

L) To exert force on an object using muscles

M) A tennis stroke made across the body with the back of the hand facing the direction of the stroke
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Two resistors of resistances R1 and R2, with R2>R1, are connected to a voltage source with voltage V0. When the resistors are
Contact [7]

Answer:

r=0.127

Explanation:

When  connected in series

Current = I

When connected in parallel

Current = 10 I

We know that equivalent resistance

In series  R = R₁+R₂

in parallel  R= R₁R₂/(R₂+ R₁)

Given that voltage is constant (Vo)

V = I R

Vo = I (R₁+R₂)  ------------1

Vo = 10 I (R₁R₂/(R₂+ R₁)) -------2

From above equations

10 I (R₁R₂/(R₂+ R₁)) = I (R₁+R₂)  

10  R₁R₂ =  (R₁+R₂) (R₂+ R₁)

10  R₁R₂  = 2  R₁R₂  + R₁² + R₂²

8 R₁R₂  =     R₁² + R₂²

Given that

r =  R₁/R₂

Divides by R₂²

8R₁/R₂  = ( R₁/R₂)²+ 1

8 r = r ² + 1

r ² - 8 r+ 1 =0  

r= 0.127 and r= 7.87

But given that R₂>R₁  It means that r<1 only.

So the answer is r=0.127

8 0
4 years ago
How can a vector have a component value equal to zero and also have a non zero magnitude
lina2011 [118]
The vector's magnitude is the square root of (one component squared) + (the other component squred). The magnitude is non-zero if one component or the other is zero, but not if they both are.
5 0
3 years ago
9) Manypeoplearefamiliarwiththefactthatariflerecoilswhenfired.Thisrecoilistheresultof actionreactionforcepairs.Agunpowderexplosi
ycow [4]

Answer:

B. Smaller than the acceleration of the bullet.

Explanation:

According to the law of  conservation of momentum; the total momentum of the gun and bullet after firing is equal to the total momentum of the gun and bullet before firing.

However, the mass of gun is much larger than that of the bullet hence it follows that the velocity and acceleration during the recoil of the rifle is much smaller in comparison to the velocity and acceleration of the of bullet.

So; the acceleration of the rifle is given by the force exerted on the rife by the bullet divided by the mass of the rifle. Given that the mass of the rifle is much greater than the mass of the bullet, the acceleration of the rifle is much less than that of the bullet.

6 0
3 years ago
Why are choir concerts better in performance halls than in gymnasiums?
dlinn [17]

Constructive interference in performance halls and the elimination of echoes are reasons why choir concerts better in performance halls than in gymnasiums.

<h3>What is constructive interference?</h3>

Constructive interference is a phenomenon which occurs when two waves travelling in same direction and which are in phase add up together to produce a wave of greater amplitude.

Constructive interference occurs in performance halls while destructive interference occurs in gymnasiums.

Also in performance halls, echoes are minimized due to the padded walls and the curtains while echoes which disturb choir concerts occur in gymnasiums.

Therefore, choir concerts better in performance halls than in gymnasiums because of constructive interference in performance halls and the elimination of echoes.

Learn more about constructive interference and echoes at: https://brainly.in/question/2378717

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2 years ago
What will be able to maintain temperature better: conductors or insulators??
AVprozaik [17]
Insulators maintain temperatures better
7 0
3 years ago
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