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3 years ago

7

An object is placed along the principal axis of a thin converging lens that has a focal length of 16 cm. If the distance from th

e object to the lens is 24 cm, what is the distance from the image to the lens?

1 answer:

Ratling [72]3 years ago

6 0

Answer:

han dare push minute

Explanation:

Kean ummu

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How long does a player sit out of a game of handball for committing a second or third foul?

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Walking’ - If a handball player takes more than three steps without dribbling (bouncing the ball) or holds the ball for more than 3 seconds without bouncing it, shooting or passing, then that is deemed ‘walking' and possession is lost.

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3 years ago

A hockey player strikes a puck that is initially at rest. The force exerted by the stick on the puck is 975 N, and the stick is

Anna007 [38]

Explanation:

Given that,

The force exerted by the stick on the puck is 975 N

The stick is in contact with the puck for 0.0049 s

Initial speed of the puck, u = 0 (at rest)

(a) We need to find the impulse imparted by the stick to the puck.

Impulse = Force × time

J = 4.7775 kg-m/s

(b) Mass of the puck, m = 1.76 kg

We need to find the speed of the puck just after it leaves the hockey stick.

Let the speed be v.

As impulse is equal to the change in momentum.

$J=m(v-u)\\\\4.7775=1.67(v-0)\\\\v=\dfrac{4.7775}{1.67}\\\\v=2.86\ m/s$

So, when the puck leaves the hockey stick its speed is 2.86 m/s.

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3 years ago

H) Find the inverse Laplace transforms of the equation. When the X(s) =1 /(s²+9s+20)

Anastasy [175]

Answer:

e^-4t e^-5t

Explanation:

solving s²+9s+20 quadratically we have (s+4)(s+5)

x(s) can be written as x(s) =(1/s+4)(1/s+5)

if we take the laplace inversve

L-¹ (s)=L-1(1/s+4) L-1(1/s+5)

we have e^-4t e^-5t

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1 year ago