3 years ago

Please help!!A camera lens 13.3 cm from a

Physics

1 answer:

kumpel [21]3 years ago

7 0

Answer:

f=1.92 cm

If ans is correct reply for explanation.

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Which property of metals allows corrosion to take place? reactivity malleability ductility conductivity Description

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Your best bet would be reactivity

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3 years ago

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What is the kinetic energy of an object moving 40m/s with a mass of 20kg?

Svet_ta [14]

KE = (1/2) (mass) (speed)²

KE = (1/2) (20 kg) (40 m/s)²

KE = (1/2) (20 kg) (1,600 m²/s²)

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KE = 16,000 Joules

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A book falls off a shelf that is 10.0 m tall. What is the velocity at which the book hits the ground?

Elena L [17]

Answer:

14 m/s

Explanation:

The motion of the book is a free fall motion, so it is an uniformly accelerated motion with constant acceleration g=9.8 m/s^2 towards the ground. Therefore we can find the final velocity by using the equation:

$v^2 = u^2 + 2gd$

where

u = 0 is the initial speed

g = 9.8 m/s^2 is the acceleration

d = 10.0 m is the distance covered by the book

Substituting data, we find

$v=\sqrt{0^2 + 2(9.8 m/s^2)(10.0 m)}=14 m/s$

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3 years ago

According to the rule of 72 and about how many years will $78 be worth $39 if the rate of inflation is 5.8%

Monica [59]

The answer is 12.4 years

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3 years ago

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If you drop an object from rest, the distance it falls is given by (1/2)at2, where a is the acceleration of the object and t is

klio [65]

If,

$d \: = \: \frac{1}{2} a {t}^{2}$

then, with 3x time t, (suppose, new distance is h)

$h \: = \: \frac{1}{2} a {(3t)}^{2}$

$= \frac{1}{2} a9 {t}^{2}$

$= 9 \: \frac{1}{2} a{t}^{2}$

$= 9d$

Therefore, new distance h will be 9 times bigger than distance d.

answer: c

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3 years ago