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Stolb23 [73]
3 years ago
8

One square megameter is equal to 1. 0×106 square kilometers. How many square megameters are in 4,000,000 square kilometers?

Physics
1 answer:
Akimi4 [234]3 years ago
3 0

Answer:

One has 1E6 km^2 / MM

4E6 km^2 / (1E6 km^2/MM) = 4 MM or 4 megameter

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Five multiple choice science questions! Help please!
andreyandreev [35.5K]
1) the sun (greek name Helios gives heliocentric)
2) A.  Newton's laws of motion can prove this as well as Kepler's Laws
3) D. Inertia keeps it from falling onto the sun and gravity keeps it from going off in a straight line
4) moons.  They orbit planets not suns directly
5) B (International Space Station gives a hint)

7 0
4 years ago
Brainliest for correct answer! :)
Katena32 [7]

Answer:

1. 300.15

2. 873.15

3. 221.95

1. -243.15

2. -210.85

3. 295.17

5 0
3 years ago
ariana is accelerating her car at 4.6 m/s^2 it took her 10 seconds to reach this acceleration her starting lost the day was 0 me
arlik [135]
Acceleration of the car driven by Ariana = 4.6 m/s^2
Time taken to reach this acceleration = 10 seconds
Let us assume the final velocity of the car (V2) = x m/s
Initial velocity of the car driven by Ariana (V1) = 0 m/s
Then
Acceleration = (V2 - V1)/ Time taken
4.6 = (x - 0)/10
4.6 = x/10
x = 4.6 * 10 m/s
   = 46 m/s
So the final velocity of the car Ariana was driving was 46 meters per second.
5 0
3 years ago
A heat engine performs (245 + A) J of work in each cycle while also delivering (142 + B) J of heat to the cold reservoir. Find t
Ganezh [65]

Answer:

The value is \eta  =  54.4 \%

Explanation:

From the question we are told that

    The work input is  W = ( 245 + A ) \  J

     The heat delivered is Q =  (142 + B) \  J

      The value of A is  A =  14

        The value of B  is  B  = 72

Generally the efficiency of the heat engine is mathematically represented as

          \eta  =  \frac{W}{Q_t}

Here  Q_t is the total out energy produce by the heat engine and this is mathematically represented as

           Q_t= Q + W

=>         Q_t=  245 + A + 142 + B

=>         Q_t=  390 + A+B

So

               \eta  =  \frac{245 + A }{390 + A+ B}

=>          \eta  =  0.544

=>          \eta  =  0.544 *100

=>          \eta  =  54.4 \%

5 0
3 years ago
A baby bounces up and down in her crib. Her mass is 13.0 kg, and the crib mattress can be modeled as a light spring with force c
Julli [10]

Answer:

a) 0.804second

b) 0.162m

Explanation:

In simple harmonic motion;

Period T = 2π√m/k

Where m is the mass of the object

K is the force constant

Given:

M = 13.0kg

K = 788N/m

T = 2π√13/788

T = 2π√0.0165

T = 2π×0.128

T = 0.804second

Frequency is the reciprocal of the period. F = 1/T

F = 1/0.804

F = 1.244Hertz

b) To get the amplitude x, we will use the relationship F = kx where F is the force exerted by the baby of mass 13kg

x = F/k

Since F = mg

x = mg/k

Assume g = 9.81m/s²

x = (13×9.81)/788

x = 127.53/788

x = 0.162m

The minimum amplitude that she requires is 0.162m

6 0
3 years ago
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