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Kitty [74]
3 years ago
15

What is the velocity in meters per second of a runner who runs exactly 110 m toward the beah in 72 seconds?

Physics
2 answers:
rjkz [21]3 years ago
8 0
B) 1.53 m/s towards the beach
Vitek1552 [10]3 years ago
6 0

Answer:

B). 1.53 m/s toward the beach

Explanation:

Velocity consists of a) a magnitude (the speed) and b) a direction.

The speed is given by the ratio between the distance covered and the time taken:

v=\frac{110 m}{72 s}=1.53 m/s

while the direction is given in the problem, it is the same as the displacement (toward the beach).

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3 years ago
3.00 m^3 of water is at 20.0°C.
krok68 [10]

Answer:

9m^3

Explanation:

Given data

volume  v1=  3m^3

volume  v2=  ???

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V1/T1= V2/T2

substitute

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6 0
2 years ago
11–8 Consider a heavy car submerged in water in a lake with a flat bottom. The driver’s side door of the car is 1.1 m high and 0
Greeley [361]

Answer:

Explanation:

position of centre of mass of door from surface of water

= 10 + 1.1 / 2

= 10.55 m

Pressure on centre of mass

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10 ⁵ + hdg

= 10⁵ + 10.55 x 1000 x 9.8

= 2.0339 x 10⁵ Pa

the net force acting on the door (normal to its surface)

= pressure at the centre x area of the door

= .9 x 1.1 x 2.0339 x 10⁵

= 2.01356 x 10⁵ N

pressure centre will be at 10.55 m below the surface.

When the car is filled with air or  it is filled with water , in both the cases pressure centre will lie at the centre of the car .

7 0
3 years ago
Which of these best defines weather? (3 points) a Atmospheric conditions over 30-year period Ob Day-to-day condition of the atmo
prisoha [69]

Answer:

b Day-to-day condition of the atmosphere

Explanation:

Weather is short term, Climate is long term

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2 years ago
Read 2 more answers
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