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3 years ago

Please help me please

Physics

1 answer:

Sedbober [7]3 years ago

3 0

The displacement is the area under the graphs. C is 5x2=10m and D is 0.5 x 2.5 x 2.5 = 6.25m

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4 years ago

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4 years ago

A baseball is hit into the air with a velocity of 27 m/s. How high does it go?

Marizza181 [45]

Answer:

Explanation:

If a baseball is hit into the air with a velocity of 27 m/s, we want to determine the maximum height of the ball. Using the projecile formula;

Max height H = u²/2g

u is the initial velocity of the body = 27m/s

g is the acceleration due to gravity = 9.81m/s²

H = 27²/2(9.81)

H = 729/19.62

H = 37.16m

Hence the ball went 37.16m high

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3 years ago

Active listening includes all of the following EXCEPT: A. paraphrasing B. clarifying C. ignoring D. empathizing Please select th

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Answer:

C: Ignoring

Explanation:

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3 years ago

A movie star catches a paparazzi reporter snapping pictures of her at home and claims that he was trespassing. He, of course den

guajiro [1.7K]

Answer:

44.755 m

Explanation:

Given:

Height of the movie star, H = 1.75 m = 1750 mm

Height of the image, h = - 8.25 mm

Focal length of the camera = 210 mm

Let the distance of the object i.e the distance between camera and the movie star be 'u'

and

distance between the camera focus and image be 'v'

thus,

magnification, m = $\frac{\textup{h}}{\textup{H}}$

also,

m = $\frac{\textup{-v}}{\textup{u}}$

thus,

$\frac{\textup{-v}}{\textup{u}}=\frac{\textup{h}}{\textup{H}}$

$\frac{\textup{-v}}{\textup{u}}=\frac{\textup{-8.25}}{\textup{1750}}$

$\frac{\textup{1}}{\textup{v}}=-\frac{\textup{1750}}{\textup{-8.25}}\times\frac{1}{\textup{u}}$ ....................(1)

now, from the lens formula

$\frac{\textup{1}}{\textup{f}}=\frac{\textup{1}}{\textup{u}}+\frac{1}{\textup{v}}$

on substituting value from (1)

$\frac{\textup{1}}{\textup{210}}=\frac{\textup{1}}{\textup{u}}+-\frac{\textup{1750}}{\textup{-8.25}}\times\frac{1}{\textup{u}}$

$\frac{\textup{1}}{\textup{210}}=\frac{\textup{1}}{\textup{u}}(1 -\frac{\textup{1750}}{\textup{-8.25}})$

u = 210 × ( 1 + 212.12 )

u = 44755.45 mm

u = 44.755 m

6 0

4 years ago