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2 years ago

6

Which of the following has greater kinetic energy?

1 answer:

uysha [10]2 years ago

5 0

I aint got no clue ask someone that knows about this.

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A woman places her briefcase on the backseat of her car. As she drives to work, the car negotiates an unbanked curve in the road

PSYCHO15rus [73]

Answer:

The force that cause the centripetal acceleration is the static friction, and the briefcase begin to move if the force of centripetal acceleration exceeds the force due to the static friction

Explanation:

Given data:

r = radius = 54.5 m

v = speed of the car = 12.4 m/s

The force due to the static friction that is exerted on the curve in the road is what causes the centripetal acceleration. If the force due to centripetal acceleration is greater than the force of static friction, then the briefcase will begin to roll.

6 0

3 years ago

A tall cylinder contains 20 cm of water. Oil is carefully poured into the cylinder, where it floats on top of the water, until t

Zanzabum

Answer:

Pressure, P = 3724 Pa

Explanation:

Given that,

Depth of water, $h_w=20\ cm =0.2\ m$

Depth of oil, $h_o=40-20=20\ cm=0.2\ m$

The density of water, $d_w=1000\ kg/m^3$

The densinty of oil, $d_o=900\ kg/m^3$

We need to find the gauge pressure at the bottom of the cylinder. So, total pressure is equal to :

$P=d_wgh_w+d_ogh_o\\\\P=(d_wh_w+d_oh_o)g\\\\P=(1000\times 0.2+900\times 0.2)\times 9.8\\\\P=3724\ Pa$

So, the gauge pressure at the bottom of the cylinder is 3724 Pa.

3 0

3 years ago

What type of friction is it when two students are pushing a box that is at rest

iren [92.7K]

The type of friction this is are Kinetic friction!

4 0

3 years ago

Diamonds are a very dense material. Predict what would happen to the light ray if you projected it from air through a diamond.

pochemuha

It [the diamond] would act like a prism, and make a rainbow, or, the light would break up and disappear

Hope I helped!
~Mathlete12321

5 0

3 years ago

A flat disk, a solid sphere, and a hollow sphere each have the same mass m and radius r. The three objects are arranged so that

Aloiza [94]

Answer:

b)

Explanation:

Rotational inertia of the sphere: $\frac{2}{5}mr^2$

Rotational inertia of hollow sphere: $\frac{2}{3}mr^2$

Rotational inertia of flat disk: $\frac{1}{2}mr^2$

The largest value is 2/3 mr², therefore, hollow sphere's inertia is largest.

7 0

3 years ago