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laila [671]
3 years ago
12

Describe all of the forces acting on the ice cream in the root beer float. Relate these forces to the fact that the ice cream is

floating
Physics
1 answer:
Tasya [4]3 years ago
8 0

Answer:

Sample Response:

Explanation:

The root beer exerts a force on all sides of the ice cream. These forces are all equal and cancel each other out. Gravity pushes downward on the ice cream. This can also be called the weight of the ice cream. Buoyant force pushes the ice cream upward. The ice cream floats because the buoyant force is greater than the weight of the ice cream.

What did you include in your response? Check all that apply.  

The root beer exerts a force on all sides of the ice cream. These forces are all equal and cancel each other out.  

Gravity pushes downward on the ice cream. This can also be called the weight of the ice cream.  

Buoyant force pushes the ice cream upward.

The ice cream floats because the buoyant force is greater than the weight of the ice cream.

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A ship leaves a port at noon and travels due west at 20 knots. At 6 PM, a second ship leaves the same port and travels northwest
Amanda [17]

Answer:

v = 12.44 Knots

Explanation:

First ship starts at Noon with speed 20 Knots towards West

now we know that 2nd ship starts at 6 PM with speed 15 Knots towards North West

so after time "t" of 2nd ship motion the two ships positions are given as

r_1 = 20(t + 6)\hat i

r_2 = 15(t)(cos45\hat i + sin45\hat j)

now we can find the distance between two ships as

x = \sqrt{(20(t + 6) - 10.6 t)^2 + (10.6t)^2}

now we have

x^2 = (120 + 9.4 t)^2 + (10.6 t)^2

x^2 = 200.72 t^2 + 14400 + 2256 t

now we will differentiate it with respect to time

2x\frac{dx}{dt} = 401.44 t + 2256

here we know that

t = \frac{90}{15} = 6 hours

so we have

x = 187.5

now we have

2(187.5) v = 401.44(6) + 2256

v = 12.44 Knots

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Los rieles de una vía de tren de acero tienen 1500 m de longitud. ¿Qué longitud tendrá cuando
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Answer:

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