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PilotLPTM [1.2K]
3 years ago
14

A helicopter's speed increases from 30m/s to 40m/s in 5 seconds. What is the acceleration of this helicopter?

Physics
1 answer:
MrMuchimi3 years ago
8 0

Answer: hhhhhhhhhhhhhhhhhhhhhhhfffffffffffff

Explanation:gggggggggggggggggggggggggggggggggggggggggggg b

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A 5.0 V battery storing 43.0 kJ of energy supplies 1.5 A of current to a circuit. How much energy does the battery have left aft
Free_Kalibri [48]

Answer:

B. 16 kJ

Explanation:

Energy = VIt.............. Equation 1

Where V = Voltage, I = Current, t = time

Given: V = 5.0 V, I = 1.5 A, t = 1 h = 3600 s.

Substitute these values into equation 2

E = 5.0(1.5)(3600)

E = 27000 J

E = 27 kJ.

Amount of energy left = 43 kJ - 27 kJ

Amount of energy left = 16 kJ.

Hence the right option is B. 16 kJ

3 0
3 years ago
Which element contains a full 2p orbital in its valence shell
alex41 [277]
So Neon ( Ne) is the correct answer.

3 0
4 years ago
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The total amount of energy in the universe is...
pav-90 [236]

Answer:

infinite?

Explanation:

3 0
4 years ago
Select the volume units that are greater than one liter
dsp73

-- kiloliter ... 1000 liters

-- megaliter ... 1 million liters

Those two are the only ones on the list that are bigger than 1 liter.

The others:

-- milli- ... 0.001

-- deci- ... 0.1

-- centi- ... 0.01

-- nano- ... 0.000 000 001

6 0
3 years ago
A person, with his ear to the ground, sees a huge stone strike the concrete pavement. A moment later two sounds are heard from t
Vladimir [108]

Answer:

The distance is d =  193.6 \ m

Explanation:

From the question we are told that

   The time interval between the sounds is  kt_1 =  k  + t_2 =  0.50 s

    The  speed of sound in air is  v_s  =  343 \ m/s

    The  speed of sound in the concrete is v_c  =  3000 \ m/s

 

Generally the distance where the collision occurred is  mathematically represented as

          d =  v * t

Now from the question we see that d is the same for both sound waves

 So

        v_c t  = v_s * t_1

Now  

So t_1 =  k + t

      v_c t  = v_s * (t+ k)

=>     3000  t  = 343* (t+ 0.50)

=>    3000  t  = 343* (t+ 0.50)

=>    t  =  0.0645 \ s

So

     d =   3000 *  0.0645

     d =  193.6 \ m

       

     

5 0
3 years ago
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