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Trava [24]
4 years ago
10

Which data from ocean rocks showed seafloor spreading and convinced scientists the theory of plate tectonics was valid?A.

Physics
1 answer:
Lena [83]4 years ago
3 0
The Answer is B. paleomagnetism
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An automobile has a mass of 1200 kg. What is its kinetic energy, in kJ, relative to the road when traveling at a velocity of 50
nikdorinn [45]

Answer:

K.E = 463.04 k J

P = 23.14 Watt

Explanation:

given,

mass of automobile = 1200 kg

velocity = 50 km/h

             = 50 × 0.278

             = 13.9 m/s

kinetic energy = \dfrac{1}{2}mv^2

                        =\dfrac{1}{2}\times 1200 \times 13.9^2

        K.E = 115.93 k J

vehicle accelerated to velocity = 100 km/h

                                                    = 100 × 0.2778

                                                    = 27.78 m/s

kinetic energy = \dfrac{1}{2}mv^2

                        =\dfrac{1}{2}\times 1200 \times 27.78^2

        K.E = 463.04 k J

work done = change in kinetic energy

                   = 463.04 - 115.93

                   = 347.11 J

Power = \dfrac{work\ done}{time}

Power =\dfrac{347.11}{15}

P = 23.14 Watt

7 0
3 years ago
(I will be marking brainliest if yall help me!)
yawa3891 [41]

Its number A)!!

If an object has a net force acting on it, it will accelerate. The object will speed up, slow down or change direction. An unbalanced force (net force) acting on an object changes its speed and/or direction of motion. An unbalanced force is an unopposed force that causes a change in motion.

Hope this helps!!  :-)

5 0
4 years ago
Read 2 more answers
What is the latitude and longitude of Washington D.C.
slava [35]
The latitude and longitude for Washington D.C. is 38.9072° N, 77.0369° W.
5 0
3 years ago
Read 2 more answers
According to the Hooke’s law formula, the force is proportional to what measurement?
vesna_86 [32]
According to Hooke's Law formula. The force is proportional to the displacement of the spring. I believe
8 0
3 years ago
Read 2 more answers
A truck is carrying a refrigerator as shown in the figure. The height of the refrigerator is 158.0 cm, the width is 60.0 cm. The
aliina [53]

The maximum acceleration the truck can have so that the refrigerator does not tip over is 1.86m/s².

<h3>What is acceleration?</h3>

Acceleration is the change in velocity with time.

The maximum acceleration is obtained by taking moments about the tipping point of rotation.

  • Moment = force * perpendicular distance
  • Clockwise moment = Anticlockwise moment

F₂ * 1.58 m = F₁ * 0.67 m

where

F₂ is tipping force = mass * acceleration, a

F₁ is weight = mass * acceleration due to gravity, g

The weight acts at a distance half the width of the refrigerator = 30 cm or 0.3 m

Height of refrigerator is 158 cm 0r 1.58 cm

m * a * 1.58 = m * 9.81 * 0.30

a = 1.86 m/s²

The maximum acceleration the truck can have so that the refrigerator does not tip over is 1.86m/s².

In conclusion, if the maximum acceleration is exceeded, the refrigerator will tip over.

Learn more about acceleration at: brainly.com/question/14344386

#SPJ1

8 0
2 years ago
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