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Alex777 [14]
3 years ago
13

A roller coaster moves 200 ft horizontally, then rises 135 ft at an angle of 30.0° above the horizontal. Next, it travels 135 f

t at an angle of 40.0° below the horizontal. Use graphical techniques to find the roller coaster's displacement from its starting point at the end of this movement.

Physics
1 answer:
vekshin13 years ago
4 0

Answer:

171 ft

Explanation:

The distance to be calculated is AB

AB = AC + BC

AC;  Cos 60 = AC ÷ 135

AC = 135 cos 60 = 67.5 ft

BC; Cos 40 = BC ÷ 135

BC = 135 cos 40 = 103.416 ft

AB = 67.5 + 103.416 = 170.9159998210 ft

Distance between starting point to end point = 171 ft

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<u>Answer:</u> The final temperature of the solution is 80.14^oC

<u>Explanation:</u>

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m_1\times c_1\times (T_{final}-T_1)=-[m_2\times c_2\times (T_{final}-T_2)]    ..........(1)

where,

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T_{final} = final temperature = ?

T_1 = temperature of aluminium = 24^oC

T_2 = temperature of coffee = 83^oC

c_1 = specific heat of aluminium = 0.904J/g^oC

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Putting all the values in equation 1, we get:

39\times 0.904\times (T_{final}-24)=-[166\times 4.1801\times (T_{final}-83)]

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