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3 years ago

Ella rode her sled down the hill in a straight line what changed as the sled went down the hill?

Physics

1 answer:

Lady bird [3.3K]3 years ago

4 0

D is your answer hope this helps.

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The block in the drawing has dimensions L0×2L0×3L0,where L0 =0.5 m. The block has a thermal conductivity of 200 J/(s·m·C˚). In d

Dennis_Churaev [7]

Answer:

$Q_p=18000\ J$

$Q_o=8000\ J$

$Q_g=72000\ J$

Explanation:

Given:

Length of block, $l=3L_o=3\times 0.5=1.5\ m$

Breadth of block, $b=L_o=0.5\ m$

height of block, $h=2L_o=2\times 0.5=1\ m$

Thermal conductivity of the block, $k=200\ W.m.^{\circ}C$

Temperature on the hotter side, $T_H=37^{\circ}C$

temperature on the cooler side, $T_L=7^{\circ}C$

time for which the heat flows, $t=4\ s$

REFER THE ATTACHED IMAGE FOR THE REFERENCE

The rate of heat flow using Fourier's law of conduction is given as:

$\frac{Q}{t}=k.A.\frac{dT}{dx}$

Now the amount heat flow perpendicular to the pink surface:

$\frac{Q_p}{4}=200\times (0.5\times 1.5).\frac{30}{1}$

$Q_p=18000\ J$

Now the amount heat flow perpendicular to the orange surface:

$\frac{Q_o}{4}=200\times (0.5\times 1).\frac{30}{1.5}$

$Q_o=8000\ J$

Now the amount heat flow perpendicular to the green surface:

$\frac{Q_g}{4}=200\times (1.5\times 1).\frac{30}{0.5}$

$Q_g=72000\ J$

6 0

3 years ago

Answer the following question according to formal grammatical rules.

VARVARA [1.3K]

Answer:

Explanation:

just trying to follow basic grammar.

5 0

3 years ago

A model that shows the many interconnected feeding relationships in an ecosystem is a food .

arlik [135]

Answer:

Since ecosystems contain many different species of animals, plants, and other organisms, consumers have a variety of food sources. The pattern of feeding represented by these interconnected and branching food chains is called a food web. Figure 36-3 shows how food chains within a food web are interconnected.

Explanation:

4 0

3 years ago

Read 2 more answers

A 55kg cart is pushed by a force of 225 n. what is the carts acceleration?

gayaneshka [121]

F=ma so a=F/m
a=225/55=4.09 m/sec^2

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4 years ago

Type your answers to these 4 questions in the submission area.

ELEN [110]

1)the edges where two plates meet are plate boundaries.

2)a sudden slip on a fault triggers an earthquake as stress in the edge overcomes the tension that releases energy into waves that move through the surface of the earth and cause a shake.

3)motion of the ground, aftershocks, shuddering, trembling, wobbling, crashing, falling, breaking, and more

4) the outer layer of Earth is the crust (lithosphere) which is made up of hot molten rock and granite.

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3 years ago