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Nesterboy [21]
2 years ago
5

What is the all time speed record for completing the iditarod?.

Physics
1 answer:
shtirl [24]2 years ago
3 0
<h3>Question:</h3>

•What is the all time speed record for completing the iditarod?

Answer:

•In 2016, Dallas broke his own record, finishing in 8 days, 11 hours, 20 minutes and 16 seconds. In 2017, Mitch Seavey broke all previous records by finishing in 8 days, 3 hours, 40 minutes and 13 seconds, which currently stands as the fastest winning time for the Iditarod.

Explanation:

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Action and Reaction are equal in magnitude and opposite in direction.Then,Why do they not balance each other?​
Ivan

Answer:

Newton's third law of motion states that every action has an equal and opposite reaction. This indicates that forces always act in pairs. Reaction forces are equal and opposite, but they are not balanced forces because they act on different objects so they don't cancel each other out.

4 0
2 years ago
A car at the top of a ramp starts from rest and rolls to the bottom of the ramp, achieving a certain final speed. If you instead
zimovet [89]

Answer:

It must be 4 times high.

Explanation:

  • Assuming that the car can be treated as a point mass, and that the ramp is frictionless, the total mechanical energy must be conserved.
  • This means, that at any time, the following must be true:
  • ΔK (change in kinetic energy) = ΔU (change in gravitational potential energy)

⇒      m*g*h = \frac{1}{2} * m*v^{2}

  • Let's call v₁, to the final speed of the car, and h₁ to the height of the ramp.

       So, at the bottom of the ramp, all the gravitational potential energy

      must be equal to the kinetic energy of the car (Defining the bottom of

      the ramp as our zero reference for the gravitational potential energy):

       m*g*h_{1}  = \frac{1}{2} * m*v_{1} ^{2}  (1)

  • Now, let's do v₂ = 2* v₁
  • Replacing in (1) we get:

        m*g*h_{2}  = \frac{1}{2} * m*(2*v_{1}) ^{2} (2)

  • Dividing (2) by (1), and rearranging terms, we get:
  • h₂ = 4* h₁
8 0
3 years ago
Does heat flow towards cold?​
Liula [17]

Answer:

And unless people interfere, thermal energy — or heat — naturally flows in one direction only: from hot toward cold. Heat moves naturally by any of three means. The processes are known as conduction, convection and radiation. Sometimes more than one may occur at the same time.

4 0
3 years ago
A car accelerates from 10 km/hr to 50 km/hr in 8 seconds. What is the acceleration?
nikklg [1K]
The answer is 5 km/hr

6 0
3 years ago
What happens when the voltage increases and the resistance stays the same in a electrical circuit?
Orlov [11]

Answer:

The current in the circuit increases

Explanation:

The ohm's law states that the potential across a circuit is proportional to the current in the circuit.

                                             V ∝ I

Where 'V' is the potential difference across the circuit and 'I' is the current in the circuit.

The proportionality constant present in the equation is the resistance of the circuit. Hence, the equation becomes

                                             V = IR

According to the equation, when V is directly proportional to 'I' where 'R' remains as constant, then the change in 'V is brings change in 'I' to make the equation valid.

So, when there is an increase in the voltage, the current on the circuit increases.

4 0
3 years ago
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