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4 years ago

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On his fishing trip Justin rides in a boat 12 km south. The fish aren’t biting so they go 4 km west. They then follow a school o

f fish 1 km north. What distance did they cover? What was their displacement?

1 answer:

In-s [12.5K]4 years ago

6 0

The distance they covered was 17 Km. Not sure that their displacement was though sorry.

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The Indianapolis speedway consists of a 2.5 mile track having four turns, each 0.25 mile long and banked at 9 12'

blsea [12.9K]

Answer: Your question is missing below is the question

Question : What is the no-friction needed speed (in m/s ) for these turns?

answer:

20.1 m/s

Explanation:

2.5 mile track

number of turns = 4

length of each turn = 0.25 mile

banked at 9 12'

<u>Determine the no-friction needed speed </u>

First step : calculate the value of R

2πR / 4 = πR / 2

note : πR / 2 = 0.25 mile

∴ R = ( 0.25 * 2 ) / π

= 0.159 mile ≈ 256 m

Finally no-friction needed speed

tan θ = v^2 / gR

∴ v^2 = gR * tan θ

v = √9.81 * 256 * tan(9.2°) = 20.1 m/s

8 0

3 years ago

A single slit of width d = 0.08 mm is illuminated by light of two wavelengths, l = 446 nm and l = 662 nm. The diffraction patter

lorasvet [3.4K]

Answer

given,

width of slit, d = 0.08 mm

d = 8 x 10⁻⁵ m

light of two wavelength

I₁= 446 nm

I₂ = 662 nm

a) angles at which the third dark fringe

$sin C = \dfrac{m\lambda}{d}$

m = 3 , I₁= 446 nm

$sin C = \dfrac{3\times 446 \times 10^{-9}}{8\times 10^{-5}}$

C = 0.958°

m = 3 , I₁= 662 nm

$sin C = \dfrac{3\times 662 \times 10^{-9}}{8\times 10^{-5}}$

C = 1.423°

b) angles at which the third dark fringe

$sin C = \dfrac{m\lambda}{d}$

m = 1 , I₁= 446 nm

$sin C = \dfrac{1\times 446 \times 10^{-9}}{8\times 10^{-5}}$

C = 0.319°

m = 1 , I₁= 662 nm

$sin C = \dfrac{1\times 662 \times 10^{-9}}{8\times 10^{-5}}$

C = 0.474°

4 0

3 years ago

State Newton's second law of<br>motion and write down<br>three examples to<br>justity it.

kakasveta [241]

Answer:

The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.

$f = m \times a$

f= force

m=mass

a=acceleration

Explanation:

examples:

riding your bicycle

•your bicycle is the mass, your leg pushing in pedals of your bicycle is the force

pushing a box

•the box is the mass, you are pushing the box

setting a pencil down in a table

•the pencil is the mass, you are puting the pencil down

3 0

3 years ago

Perform the following addition and subtraction, and express the result in scientific notation:

LiRa [457]

Answer:

.

Explanation:

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3 years ago

What happens in terms of energy when a moving car hits a parked car, causing the parked car to move?

MrMuchimi

<u>Answer;</u>

<em>The moving car transfers kinetic energy to the parked car. </em>

<u>Explanation;</u>

Energy is the ability of work to be done. It is measured in joules. The energy in an object depends on whether an object is in motion or at rest.
Kinetic energy is the energy possessed by a body in motion. Calculated by 1/2mv², where m is the mass of the body and v is the velocity of the body in motion. Therefore, the moving car possess kinetic energy.
When a body is at rest it posses potential energy. Thus, the parked car possessed kinetic energy which changed when it was hit by the moving car as the kinetic energy of the moving car was transferred to the parked car.

8 0

3 years ago

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