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Alex73 [517]
3 years ago
15

What is the velocity of a group of explorers traveling from Antarctica to Australia, traveling 1500 miles in 48 hours?31.25 mph

south
72,000 mph
48 mph
31.3 mph north
Physics
1 answer:
Brums [2.3K]3 years ago
7 0

Answer:

31.3mph North

Explanation:

Given parameters:

Distance traveled  = 1500miles

Time taken  = 48hrs

Unknown:

Velocity of the group of explorers = ?

Solution:

Velocity is the displacement divided by the time taken. It is a vector quantity with both magnitude and direction.

 So;

       Velocity = \frac{displacement}{time}

Displacement is the distance moved in a specific direction = 1500miles North

 Insert the parameters and solve;

   Velocity = \frac{1500}{48}   = 31.3mph North

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adell [148]

To solve this problem we will apply the principle of buoyancy of Archimedes and the relationship given between density, mass and volume.

By balancing forces, the force of the weight must be counteracted by the buoyancy force, therefore

\sum F = 0

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m = mass

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The buoyancy force corresponds to that exerted by water, while the mass given there is that of the object, therefore

\rho_w V_{displaced} g = mg

Remember the expression for which you can determine the relationship between mass, volume and density, in which

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\rho_w (0.429V) = V \rho

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0.429(1000) = \rho

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2 years ago
Fill in the blank: An object is most likely to sink in water if _________________.
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3 years ago
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Which statement correctly describes the relationship between thermal energy and particle movement?
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A dentist’s drill starts from rest. After 3.20 s of constant angu-lar acceleration, it turns at a rate of 2.51 3 104 re v/m i n.
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Answer:

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Explanation:

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t means time t= 3.20 s

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w_{f} = (2π/60) *2.513*10^{4} rad/s

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so the rotational motion about a fixed axis is:

w^{2} _{f} =w^{2} _{i} + 2αΔTita    where ΔTita is the angle in radians

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Answer:

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