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3 years ago

Please help mehow long did bob take to complete the race? explain your answer

Physics

2 answers:

WITCHER [35]3 years ago

6 0

14 seconds is ur answer!!

Taya2010 [7]3 years ago

4 0

Answer:

14 seconds

Explanation:

The line which represents Bob reaches 100m when the time is 14 seconds (14,100).

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A hollow sphere of inner radius 8.82 cm and outer radius 9.91 cm floats half-submerged in a liquid of density 948.00 kg/m^3. (a)

kari74 [83]

Answer:

a) 0.568 kg

b) 474 kg/m³

Explanation:

Given:

Inner radius = 8.82 cm = 0.0882 m

Outer radius = 9.91 cm = 0.0991 m

Density of the liquid = 948.00 Kg/m³

a) The volume of the sphere = $\frac{4\pi}{3}\times(0.0991^2-0.0882^2)$

volume of sphere = 0.0012 m³

also, volume of half sphere = $\frac{\textup{Total volume}}{\textup{2}}$

volume of half sphere = $\frac{\textup{0.0012}}{\textup{2}}$

Volume of half sphere =0.0006 m³

Now, from the Archimedes principle

Mass of the sphere = Weight of the volume of object submerged

Mass of the sphere = 0.0006× 948.00 = 0.568 kg

b) Now, density = $\frac{\textup{Mass}}{\textup{Volume}}$

Density = $\frac{\textup{0.568}}{\textup{0.0012}}$

Density = 474 kg/m³

8 0

3 years ago

Jesse wants to know how well a particular brand of car wax protects his car from dirt. What is the independent variable ?

miv72 [106K]

The brand of car wax

4 0

3 years ago

What is the momentum of a 72 kg baseball player who slides into home plate

Alina [70]

Answer:

B) 350 kg m/s

Explanation:

momentum or p is given by the equation p= mxv

We have the mass and velocity so we can use the equation directly

p= 72kg x 4.9 m/s

p= 352.8 kg m/s

4 0

3 years ago

A horizontal force of 200 N is applied to move a 55 kg television set across a 10 m level surface. What is the work done by the

vivado [14]

Answer:

The work done is "2000 J".

Explanation:

The given values are:

Force,

F = 200 N

Mass,

m = 55 kg

Displacement,

d = 10 m

Now,

The work done will be:

⇒ $Work \ done= Force\times displacement$

On substituting the given values, we get

⇒ $=200\times 10$

⇒ $=2000 \ J$

3 0

3 years ago

If you hear thunder 5 seconds after you see a lightning bolt how far is the storm

NikAS [45]

I think the answer is 3 miles because its storming now where I live

4 0

3 years ago

Read 2 more answers

Please help mehow long did bob take to complete the race? explain your answer​

Please help mehow long did bob take to complete the race? explain your answer