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Afina-wow [57]
2 years ago
6

A cup of black coffee cools faster than a cup of black coffee with milk. This is because black coffee...

Physics
1 answer:
Anvisha [2.4K]2 years ago
4 0

Answer:

ofcourse milk free coffee is cool faster.

Explanation:

Keep the two liquid separate, however and uh maintain maximum temperature,so that Milk free coffee cools faster.one time uh added milk the coffee temperature drops,the delta between them and the surrounding air is reduced and the rate of cooling slows ..

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the batter swings the bat and makes contact with the ball. when this occurs, the kinetic energy of the bat is transferred to the
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A point charge is placed 100 m from a 6 uC charge generating an electric field. What is the
kvv77 [185]

The strength of the electric field is 5 N/C

Explanation:

The magnitude of the electric field produced by a single-point charge is given by:

E=\frac{kQ}{r^2}

where

k=8.99\cdot 10^9 Nm^{-2}C^{-2} is the Coulomb's constant

Q is the magnitude of the charge

r is the distance from the charge

In this problem, we have:

Q=6 \mu C = 6\cdot 10^{-6}C is the charge producing the field

r = 100 m is the distance from the charge at  which we want to calculate the field

Substituting into the equation, we find the s trength of the electric field:

E=\frac{(8.99\cdot 10^9)(6\cdot 10^{-6})}{(100)^2}=5.4 N/C \sim 5 N/C

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brainly.com/question/8960054

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3 0
3 years ago
If the elevation in reservoir b is 100m, what must the elevation in reservoir a be if thevolume flow rate through the cast-iron
Zinaida [17]

The elevation in reservoir  at  the rate of flow using is 03m/s  is 114m.

The Reynolds range is the ratio of inertial forces to viscous forces. The Reynolds variety is a dimensionless variety used to categorize the fluids structures in which the impact of viscosity is crucial in controlling the velocities or the flow sample of a fluid.

The reason of the Reynolds number is to get a few experience of the relationship in fluid glide between inertial forces (this is those that maintain going by using Newton's first law – an item in motion stays in movement) and viscous forces, this is people who cause the fluid to come back to a forestall because of the viscosity of the fluid.

calculation,

Let L = 100 m pipe

     L1 = 150 m pipe

H f = friction losses

Using Reynolds number, relative  roughness, friction co- effiicients and friction losses

Substitute the value in equation

Z = 110= 0.48= 3.54

Z = 114m

Therefore water surface elevation at reservoir  is 114 meter.

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6 0
2 years ago
A 50 kg object traveling at 100 m/s collides (perfectly elastic) with a 50 kg object initially at rest.
tino4ka555 [31]

Answer:

a

Explanation:

8 0
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