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Korvikt [17]
2 years ago
15

What is the answer?

Physics
1 answer:
Andrews [41]2 years ago
3 0

Answer:

6.26 m/s

Explanation:

Pretty slow.... the PE (Potential Energy) at 2m will be converted to KE (Kinetic Energy) at the bottom of the track (neglecting friction)

PE    =   KE

mgh = 1/2 mv^2     divide both sides of the equation by 'm'

gh    = 1/2 v^2             multiply both sides by 2

2 gh = v^2               take sqrt of both sides

v = sqrt ( 2gh) = sqrt ( 2*9.81*2) = 6.26 m/s

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Answer:

1) Conduction

2)Covection

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4)Convection (Land breeze one of the application of convection of heat)

5) Convection

6)Radiation

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8)Conduction

9) Conduction

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Hope it helps

4 0
3 years ago
A object was fired at 17ms at 40 degree angle horizontal , if object traveled 29meters how long was it in the air
Oksi-84 [34.3K]
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8 0
2 years ago
If the wavelength of an s-wave is 23,000 m, and its speed 4500 m/s, what is its frequency?
wolverine [178]

Answer:

5 metre.

Explanation:

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= 23,000/ 4,500

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3 0
3 years ago
According to the Periodic Table of Elements, Calcium (Ca) has:
RSB [31]

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Explanation:

8 0
3 years ago
How much does a crate weigh (force) if it is 0.25 meters wide and 1.5 meters long and it
serg [7]

Force of a crate : 300 N

<h3>Further explanation</h3>

Given

0.25 meters wide and 1.5 meters long

Pressure = 800 Pa

Required

Force

Solution

P = F/A

A = 0.25 x 1.5

A = 0.375 m²

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Input the value :

F = P x A

F = 800 N/m² x 0.375 m²

F = 300 N

6 0
3 years ago
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