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4 years ago

9

Roseanne heated a solution in a beaker as part of a laboratory experiment on energy transfer. After a while, she noticed the liq

uid solution began to circulate within the beaker. What process involving heat transfer did Roseanne observe inside the beaker?

1 answer:

sveta [45]4 years ago

6 0

I think it is convection hope I could help.

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3. A car travels 800 miles in 6 hours. What was the car’s average speed? Be sure to include units in your answer

vredina [299]

Answer:

133.33 miles per hour

Explanation:

There are many students who can not get answers step by step and on time

So there are a wats up group where you can get help step by step and well explained.

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3 years ago

Help please an observer at the North Pole sees the moon phase shown below. What Moon phase will be observed approximately one we

ziro4ka [17]

Answer:

it should be a new moon

Explanation:

4 0

3 years ago

What is hydraulic pressure

Gnesinka [82]

The total thrust, expressed in pounds or tons, that the hydraulic-feed mechanism on a drill can impose on a drill string; also, the pressure of the fluid within the hydraulic cylinders, generally expressed in pounds per square inch. Ref: Long.

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8 0

3 years ago

Two blocks A and B have a weight of 11 lb and 6 lb, respectively. They are resting on the incline for which the coefficients of

Andreas93 [3]

Answer:

the block that starts moving first is block A , fr = 1.625 N , fr = 1.5 N

Explanation:

For this exercise we use Newton's second law, for which we take a reference system with the x axis parallel to the plane and the y axis perpendicular to the plane

X axis

fr- Wₓ = 0

fr = Wₓ

Axis y

N- $W_{y}$ = 0

N = W_{y}

Let's use trigonometry to find the components of the weight

sin θ = Wₓ / W

Cos θ = W_{y} / W

Wₓ = W sin θ

W_{y} = W cos θ

Wₓ = 11 sin θ

W_{y} = 11 cos θ

The equation for friction force is

fr = μ N

We substitute

μ (W cos θ) = W sin θ

μ = tan θ

We can see that the system began to move the angle.

θ = tan⁻¹ μ

So the angles are

Block A θ = tan⁻¹ 0.15

θ = 8.5º

Block B θ = tan⁻¹ 0.26

θ = 14.6º

So the block that starts moving first is block A

The friction force is

Block A

fr = Wx = W sin θ

fr = 11 sin 8.5

fr = 1.625 N

Block B

fr = 6 sin 14.6

fr = 1.5 N

5 0

3 years ago

A man attaches a divider to an outdoor faucet so that water flows through a single pipe of radius 9.25 mm into four pipes, each

irinina [24]

Answer:

1.24 m/s

Explanation:

Metric unit conversion:

9.25 mm = 0.00925 m

5 mm = 0.005 m

The volume rate that flow through the single pipe is

$\dot{V} = vA = 1.45 * \pi * 0.00925^2 = 0.00039 m^3/s$

This volume rate should be constant and divided into the 4 narrower pipes, each of them would have a volume rate of

$\dot{V_n} = \dot{V} / 4 = 0.00039 / 4 = 9.74\times10^{-5} m^3/s$

So the flow speed of each of the narrower pipe is:

$v_n = \frac{\dot{V_n}}{A_n} = \frac{\dot{V_n}}{\pi r_n^2}$

$v_n = \frac{9.74\times10^{-5}}{\pi 0.005^2} = 1.24 m/s$

8 0

4 years ago