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3 years ago

13

Suppose the line on a distance-versus-time graph and the line on a speed-versus-time graph are both slanted straight lines going

through the origin. Can the two graphs be displaying the motion of the same object? Explain.

1 answer:

lesya [120]3 years ago

4 0

No, because the distance-time would show a constant velocity but the velocity-time graph shows an increasing velocity.

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Longitudinal waves cannot travel through a vacuum. True False

JulsSmile [24]

FALSE <span>Only electromagnetic </span>waves<span> can </span>travel through a vacuum<span>; mechanical </span>waves<span> such as sound </span>waves<span> require a particle-interaction to transport their energy. There are no particles in a </span>vacuum<span>. </span>Waves<span> are either </span>longitudinal<span> or transverse.
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4 0

3 years ago

If an otherwise empty pressure cooker is filled with air of room temperature and then placed on a hot stove, what would be the m

Xelga [282]

Answer:

The magnitude of the net force F₁₂₀ on the lid when the air inside the cooker has been heated to 120 °C is $\frac{135.9}{A}N$

Explanation:

Here we have

Initial temperature of air T₁ = 20 °C = ‪293.15 K

Final temperature of air T₁ = 120 °C = 393.15 K

Initial pressure P₁ = 1 atm = ‪101325 Pa

Final pressure P₂ = Required

Area = A

Therefore we have for the pressure cooker, the volume is constant that is does not change

By Chales law

P₁/T₁ = P₂/T₂

P₂ = T₂×P₁/T₁ = 393.15 K× (‪101325 Pa/‪293.15 K) = ‭135,889.22 Pa

∴ P₂ = 135.88922 KPa = 135.9 kPa

Where Force = $\frac{Pressure}{Area}$ we have

Force = $F_{120}=\frac{135.9}{A}N$ .

4 0

3 years ago

If the beam is made from wood having an allowable shear stress τallow = 390 psi , determine the maximum magnitude of p. set d =

xenn [34]

Answer:

19593.6 p

Explanation:

3 0

3 years ago

A 1.5 kg ballistic cart, moving at 2.8 m/s, ejects a 25 g ball vertically with an initial velocity of 6.5 m/s. What is the magni

Novay_Z [31]

The magnitude of the initial velocity of the ball relative to the ground is 9.3 m/s.

<h3>What is relative velocity?</h3>

Relative velocity is the velocity of an object relative to another moving in the same plane. On frame of reference is used when measuring relative velocity.

The velocity of the ball relative to the ground is the sum of the velocity of the ballistic cart and the velocity in which the ball is ejected.

The velocity of the ball relative to the ground = 6.5 m/s + 2.8 m/s = 9.3 m/s

In conclusion, relative velocity measures the velocity of an object from a reference point.

Learn more about relative velocity at: brainly.com/question/24337516

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7 0

1 year ago

Please help me with this question<br> no spams strictly

algol13

Answer:

it will be zero degree

the angle of reflection is zero on hemisphere sides and angle of i is equal to angle of r

5 0

3 years ago

Read 2 more answers