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3 years ago

Which statement about the relationship between mass in air and altitude is accurate?

Physics

1 answer:

3241004551 [841]3 years ago

3 0

Answer:

A) Mass in air is unrelated to altitude

Explanation:

Mass is the amount of matter contained in a substance. Altitude is the height of a body above a reference plane.

Mass and altitude are unrelated.

The mass of given body is the same everywhere in the universe provided no loss or gain of matter.
Altitude increases as distance from the reference widens.
Most often times, as altitude increases, temperature reduces due to the nature of the troposphere.

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Stephen schwartz created the musical godspell as well as __________.

Alik [6]

Answer:

Stephen Lawrence Schwartz (born March 6, 1948) is an American musical theater lyricist and composer. In a career spanning over five decades, Schwartz has written such hit musicals as Godspell (1971), Pippin (1972), and Wicked (2003).

Explanation:

8 0

3 years ago

Calculate the speed for each segment on the graph include the units (m/s). Show your calculations, (such as 4/2= 2 m/s)

fgiga [73]

Answer:

v_A = 6 m/s , v_B = 0 m/s , v_C = - 4 m/s , v_D = -4 m/s , v_E = 2.66 m / s

Explanation:

For this exercise we use the definition of average velocity in each segment

v_average = (x₂-x₁) / Δt

segment A of the graph you take the value of distance and time

x₁ = 0 m t₁ = 0 s

x₂ = 60 m t₂ = 10 s

using the average velocity equation and calculate

v_A = (60-0) / (10-0)

v_A = 6 m / s

Segment B

x₁ = 60m

x₂ = 60 m

since the displacement variation is zero (particle stopped) the velocity is zero

v_B = 0 m / s

Segment C and D

x₁ = 60 m t1 = 15 s

x₂ = -40 m t2 = 40 s

v_C = (-40 -60) / (40 -15)

v_C = - 4 m / s

Segment D

how is the same line

v_D = -4 m / s

Segment E

x₁ = -40 m t₁ = 40 s

x₂ = 0 m t₂ = 55 s

v_E = (0- (-40)) / (55 -40)

v_E = 2.66 m / s

6 0

3 years ago

A 50-cm^3 block of wood is floating partially submerged in water, and a 50-cm^3 block of iron is totally submerged in water. Whi

sergeinik [125]

Answer:

B) The iron

Explanation:

Both blocks have the same volume. Since the wood is partially submerged, it displaces a smaller volume of fluid than the iron, that is completely submerged. The buoyant force is proportional to the volume of the displaced fluid. Therefore, the buoyant force on iron is greater.

6 0

4 years ago

Air bags are designed to deploy in 10 ms. Given that the air bags expand 20 cm as they deploy, estimate the acceleration of the

joja [24]

As it is given that the air bag deploy in time

$t = 10 ms = 0.010 s$

total distance moved by the front face of the bag

$d = 20 cm = 0.20 m$

Now we will use kinematics to find the acceleration

$d = v_i*t + \frac{1}{2}at^2$

$0.20 = 0 + \frac{1}{2}a*0.010^2$

$0.20 = 5 * 10^{-5}* a$

$a = 4000 m/s^2$

now as we know that

$g = 10 m/s^2$

so we have

$a = 400g$

so the acceleration is 400g for the front surface of balloon

3 0

3 years ago

A horizontal spring with spring constant 85 N/mN/m extends outward from a wall just above floor level. A 4.5 kgkg box sliding ac

swat32

Answer:

v = 0.028 m/s

Explanation:

In this case you take into account that all the elastic potential of the box, when the spring is compressed is equal to the kinetic energy of the box before it hits the spring. That is:

$K=U$