2 years ago

I need help with this answer

Physics

1 answer:

7nadin3 [17]2 years ago

8 0

Answer:

double replacement

Explanation:

sorry if im wrong

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One student runs with a velocity of +10 m/s while a second student runs with a velocity of –10 m/s. Which student has the faster

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Answer:

The one with the faster velocity is the one with a velocity of -10m/s

7 0

2 years ago

The triceps muscle in the back of the upper arm extends the forearm. This muscle in a professional boxer exerts a force of 2615

mart [117]

Answer:

0.68 kg-m²

Explanation:

F = Force applied by the muscle = 2615 N

r = effective perpendicular lever arm = 2.85 cm = 0.0285 m

α = Angular acceleration of the forearm = 110.0 rad/s²

I = moment of inertia of the boxer's forearm = ?

Torque is given as

τ = I α eq-1

Torque is also given as

τ = r F eq-2

using eq-1 and eq-2

r F = I α

(0.0285)(2615) = (110.0) I

I = 0.68 kg-m²

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2 years ago

What is the frequency of a mechanical wave that has a

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Explanation:

v= (f) x ( lambda)

1.7 ms^-1/12.05 m = f =o.14 hz

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2 years ago

What is the difference between reflection and refraction

sineoko [7]

Answer:

Reflection is when light bounces off an object, while refraction is when light bends while passing through an object.

Explanation:

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2 years ago

The temperature and pressure at the surface of Mars during a Martian spring day were determined to be -41 oC and 900 Pa, respect

Fittoniya [83]

Answer:

Part a)

$\rho = 0.0205 kg/m^3$

Part b)

$\rho = 1.22 kg/m^3$

So density of atmosphere at Martian Surface is very less than the density at Earth.

Explanation:

Part a)

As per ideal gas equation we know that

$PM = \rho RT$

here we know that Martian atmosphere is equivalent to that of carbon

so we will have

$P = 900 Pa$

$T = 273 - 41 = 232 K$

now we will have

$(900)(0.044) = \rho (8.31)(232)$

$\rho = 0.0205 kg/m^3$

Part b)

Now for the earth surface the density of air is given for

$P = 101.6 kPa$

$T = 18 ^oC$

so we will have

$PM = \rho RT$

$(101.6\times 10^3)(0.029) = \rho(8.31)(273 + 18)$

$\rho = 1.22 kg/m^3$

So density of atmosphere at Martian Surface is very less than the density at Earth.

8 0

2 years ago