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kipiarov [429]
3 years ago
15

A dog walking to the right with a speed of 1.5 m s 1.5 s m ​ 1, point, 5, start fraction, start text, m, end text, divided by, s

tart text, s, end text, end fraction sees a cat and speeds up with a constant rightward acceleration of magnitude 12 m s 2 12 s 2 m ​ 12, start fraction, start text, m, end text, divided by, start text, s, end text, squared, end fraction.
Physics
2 answers:
Vikki [24]3 years ago
5 0

Answer:

8.62

Explanation:

khan academy

harina [27]3 years ago
4 0

Answer: 8.62

Explanation: it’s the answer. :)

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In a simple electric circuit, ohm's law states that v=irv=ir, where vv is the voltage in volts, ii is the current in amperes, an
Tju [1.3M]
We take the derivative of Ohm's law with respect to time: V = IR
Using the product rule:
dV/dt = I(dR/dt) + R(dI/dt)
We are given that voltage is decreasing at 0.03 V/s, resistance is increasing at 0.04 ohm/s, resistance itself is 200 ohms, and current is 0.04 A. Substituting:
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dI/dt = -0.000158 = -1.58 x 10^-4 A/s
8 0
3 years ago
A river flows at 2m/s. The velocity of a ferry relative to the shore is 4m /s at right angle to the current. What is the velocit
monitta

The velocity of the ferry relative to the current is 4.5 m/s.

<h3>Relative velocity</h3>
  • Relative velocity is the velocity of a body as observed from the reference point of another body either stationary or in motion.

Since the river is flowing parallel to the shore and the ferry is moving perpendicular to the shore, their velocities are at right angles to each other.

The two velocities form a right angled-triangle of sides 2, 4 and a hypotenuse which gives the relative velocity of the ferry to the current.

Using Pythagoras rule:

  • c² = a² + b²
  • Let c be the hypotenuse
  • a =  velocity of the ferry, and
  • b = the velocity of the current, and

c² = 4² + 2²

c² = 16 + 4

c = 20

c = √20

c = 4.47 m/s

c ≈ 4.5 m/s

Therefore, the velocity of the ferry relative to the current is 4.5 m/s.

Learn more about relative velocity and Pythagoras rule at: brainly.com/question/25617868

5 0
3 years ago
When a car is parked in hot sunlight, the temperature of the car’s seats _____ and the thermal energy of the seats _____ .
defon
More info? I think the question is incomplete. Although, I believe the first 2 blanks are "rises"
4 0
3 years ago
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geniusboy [140]

Answer:

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v=\sqrt{v_x^2+v_y^2}

The vertical component is zero, however, it has a horizontal velocity, so its initial speed is not zero, therefore the secong ball has the greater speed at ground level.

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Which property of light remains unchanged when it enters a different medium?
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