2 years ago

(06.01 MC)

Physics

2 answers:

Misha Larkins [42]2 years ago

8 0

Answer: C. Both observation 1 and observation 2

Explanation: A geocentric model shows the stars and the sun and where they move to.

God bless. <3

professor190 [17]2 years ago

4 0

C. Because the sun rises and sets and the stars move daily across the sky

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An automobile engine delivers 47.4 hp. how much time will it take for the engine to do 6.82 × 105 j of work? one horsepower is e

kogti [31]

1 horsepower is equal to 746 W, so the power of the engine is
$P=47.4 hp \cdot 746 \frac{W}{hp}=35360 W$
The power is also defined as the energy E per unit of time t:
$P= \frac{E}{t}$
Where the energy corresponds to the work done by the engine, which is $E=6.82 \cdot 10^5 J$ . Re-arranging the formula, we can calculate the time t needed to do this amount of work:
$t = \frac{E}{P}= \frac{6.82 \cdot 10^5 J}{35360 W}=19.3 s$