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OLEGan [10]
3 years ago
12

•1 if a saturn v rocket with an apollo spacecraft attached had a combined mass of 2.9 × 105 kg and reached a speed of 11.2 km/s,

how much kinetic energy would it then have?
Physics
1 answer:
Delicious77 [7]3 years ago
5 0
Kinetic energy = 1/2 (mass) (speed)²

Kinetic energy = (1/2) (2.9 x 10⁵ kg) (1.12 x 10⁴ m/s)²

= (0.5 x 2.9 x (1.12)² x 10¹³) kg-m²/s²

=  1.82 x 10¹³ Joules

atsanawfullotta joules !
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A 1500-kg car accelerates from rest to 25 m/s in 7.0 s. what is the average power delivered by the engine? (1 hp = 746 w)
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The solution for this is:
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The vo=0 and vf = 25 m/s and t=7 sec. This gives... 
3.6 m/s^2 as acceleration and d=87.5 meters and thus F=ma= 5400 N. 
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sukhopar [10]

Complete Question

A radio technician measures the frequency of an AM radio transmitter. The frequency is 14603 kHz . What is the frequency in megahertz? Write your answer as a decimal.

Answer:

The value is  x =  14.6 \  MHz

Explanation:

From the question we are told that

  The  frequency is  f =  14603  \  kHz = 14603 *1000 = 14603000 \ Hz

Generally  

       1 Hz \to  1.0 *10^{-6} \  MHz

       14603000 \ Hz  \to x MHz

=>   x =  \frac{14603000 *  1.0*10^{-6}}{1 }

=>    x =  14.6 \  MHz

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