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3 years ago

10

Air pressure is at higher alštudes. a equal blower C higher

1 answer:

Gekata [30.6K]3 years ago

6 0

Answer:

C. Height

Pressure with Height: pressure decreases with increasing altitude. The pressure at any level in the atmosphere may be interpreted as the total weight of the air above a unit area at any elevation. At higher elevations, there are fewer air molecules above a given surface than a similar surface at lower levels.

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A sled and its rider are moving at a speed of 4.0 m/s along a horizontal stretch of snow. The snow exerts a kinetic frictional f

ehidna [41]

Answer:

The acceleration of the sled is "0.49 m/s²". A further explanation is given below.

Explanation:

The given values are,

Speed,

V = 4.0 m/s

Coefficient of kinetic friction,

μ = 0.05

As we know,

⇒ $F \mu=\mu mg$

and,

⇒ $a = \mu g$

On substituting the given values, we get

⇒ $=0.0 5\times 9.8$

⇒ $=0.49 \ m/s^2$

5 0

3 years ago

The Starship Enterprise is caught in a time warp and Spock is forced to use the primitive techniques of the 20th century to dete

Goryan [66]

Answer:c=0.213 J/g/K

Explanation:

Given

sample mass $(m_s)=120 gm$

initial temperature of mineral $(T_{im})=92.6$

mass of water $(m_w)=82.9$

Water initial temperature $(T_{iw})=20$

Heat capacity of calorimeter =15.3 J/k

Final Temperature is 24.8

let c be the specific heat of mineral

Heat released by mineral sample=heat absorbed by calorimeter and water

$120\times c\times (92.6-24.8)=82.9\times 4.184\times (24.8-20)+15.3\times (24.8-20)$

$c\times 67.8=14.486$

$c=0.213 J/g/K$

3 0

3 years ago

A person uses a surfboard to ride every 30th wave crest towards the beach. The wave crest travels at a speed of 1.6m/s and the d

pashok25 [27]

Answer:

8

Explanation:

Applying,

v = λf................ Equation 1

Where v = velocity/ speed of the wave, λ = wave length of the wave, f = number of waves the person surf in one seconds.

make f the subject of the equation

f = v/λ............ Equation 2

From the question,

Given: v = 1.6 m/s, λ = 24 m

Substitute these values into equation 2

f = 1.6/24

f = 0.0667 wave/seconds.

If,

in one seconds, the person surf a total wave crest of 0.0667

Therefore,

in one hours, he will surf a total wave crest of (0.0667×60×60) = 240 waves crest

He rides for every 30th wave crest,

Hence,

number of wave crest the person surf in one hour = 240/30 = 8

6 0

3 years ago

Go to your backyard or to your high school’s basketball court or tennis court and try out this experiment to see if you can pred

Talja [164]

Answer:1 Sprint 54 cm Beyond

2 Sprint 41 cm Beyond

3 Sprint 68 cm Beyond

4 Sprint 32 cm Beyond

5 Sprint 44 cm Beyond

6 Jog 31 cm Beyond

7 Jog 22 cm Beyond

8 Walk 17 cm Beyond and left

9 Walk 6 cm Beyond

Explanation:

5 0

3 years ago

Does friction always slow things down?

Ad libitum [116K]

Yes, friction eventually slows down objects, unless you are in space. Hope this helps!

6 0

3 years ago

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