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2 years ago

if a car is moving on a highway at 70 kilometers per hour going east, what happens to its speed and velocity

Physics

1 answer:

Andrej [43]2 years ago

7 0

The speed is constant since there is no opposite force facing the car

That’s my best guest hope it helps !! :)

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An apple is placed 20.0 cm in front of a diverging lens of focal length 10.0 cm. Find the image distance and the magnification o

jenyasd209 [6]

Answer:

Image distance of apple=-6.7 cm

Magnification of apple=0.33

Explanation:

We are given that an apple is placed 20.cm in front of a diverging lens.

Object distance=u=-20 cm

Focal length=f=-10 cm

Because focal length of diverging lens is negative.

We have to find the image distance and magnification of the apple.

Lens formula

$\frac{1}{f}=\frac{1}{v}-\frac{1}{u}$

Substitute the values then we get

$-\frac{1}{10}=\frac{1}{v}+\frac{1}{20}$

$\frac{1}{v}=-\frac{1}{10}-\frac{1}{20}$

$\frac{1}{v}=\frac{-2-1}{20}=-\frac{3}{20}$

$v=-\frac{20}{3}=-6.7 cm$

Image distance of apple=-6.7 cm

Magnification=m= $\frac{v}{u}=\frac{-\frac{20}{3}}{-20}$

Magnification of apple= $\frac{1}{3}=0.33$

Hence, the magnification of apple=0.33

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2 years ago

How is NASA a catalyst to make the crew work better?

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Answer:

with teamwork

Explanation:

you need to use team work so the right answer is C

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Which of the following elements is a metalloid?

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Germanium

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3 years ago

An engineer is investigating potential energy with two

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A gold ball has a mass of 45g. In a speed test, a golf ball was driven from rest to a velocity of 90m/s.

Andrew [12]

Answer:

Acceleration (a)=change in velocity/ change in time

Velocity (v)=90m/s

Time=0.0005s

a=90/0.0005

The acceleration =180000m/s^2 or 180km/s^2

Force = mass x acceleration

m=40g= 0.04kg

F= 0.04x 180000

F= 7200N or 7.2kN

Explanation:

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3 years ago

if a car is moving on a highway at 70 kilometers per hour going east, what happens to its speed and velocity ​

if a car is moving on a highway at 70 kilometers per hour going east, what happens to its speed and velocity