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Nimfa-mama [501]
4 years ago
14

SOMEONE PLEASE PLEASE HELP QUICK PICTURE INCLUDED

Physics
1 answer:
GaryK [48]4 years ago
6 0

Answer:

A

Explanation:

Switches are used to block electrical currents, thus needing to be made out of insulating material.

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Temka [501]

Answer:

A. shadow

Explanation:

5 0
3 years ago
Read 2 more answers
How far does a 26" bicycle wheel travel at 8 miles per hour?
Luda [366]
Well if it was traveling for an hour then the answer is 8 miles.
8 0
4 years ago
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What is the acceleration of a car moving
Iteru [2.4K]

Answer: Accelaration is 2.77 m/s*s

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Explanation:

V0=0km/h=0m/s

V1=100 km/h=27.7 m/s

t=10s=

Use equation for accelaration : a=(V1-V0)/t

a=(0m/s-27.7m/s)/10s

a=-27.7s/10s

a=2.77m/s*s

6 0
4 years ago
An ice skater spinning with outstretched arms has an angular speed of 5.0 rad/s . She tucks in her arms, decreasing her moment o
Artyom0805 [142]

Answer:

  K_{f} / K₀ =1.12

Explanation:

This problem must work using the conservation of angular momentum (L), so that the moment is conserved in the system all the forces must be internal and therefore the torque is internal and the moment is conserved.

Initial moment. With arms outstretched

         L₀ = I₀ w₀

the wo value is 5.0 rad / s

final moment. After he shrugs his arms

         L_{f} = I_{f}  w_{f}

indicate that the moment of inertia decreases by 11%

        I_{f} = I₀ - 0.11 I₀ = 0.89 I₀

        L_{f} = L₀

        I_{f} w_{f}  = I₀ w₀

        w_{f} = I₀ /I_{f}    w₀

let's calculate

        w_{f} = I₀ / 0.89 I₀   5.0

        w_{f} = 5.62 rad / s

Having these values ​​we can calculate the change in kinetic energy

         K_{f} / K₀ = ½ I_{f} w_{f}² (½ I₀ w₀²)

         K_{f} / K₀ = 0.89 I₀ / I₀ (5.62 / 5)²

         K_{f} / K₀ =1.12

6 0
3 years ago
A robot probe drops a camera off the rim of a 239 m high cliff on Mars, where the free-fall acceleration is -3.7 m/s^2. Find the
cestrela7 [59]

Answer:

42.05 m/s

Explanation:

From the question given above, the following data were obtained:

Initial velocity (u) = 0 m/s

Height (h) = 239 m

Acceleration due to gravity (g) = 3.7 m/s²

Final velocity (v) =?

The velocity with which the camera hits the ground can be obtained as follow:

v² = u² + 2gh

v² = 0² + 2 × 3.7 × 239

v² = 0 + 1768.6

v² = 1768.6

Take the square root of both side

v = √(1768.6)

v = 42.05 m/s

Therefore, the velocity with which the camera hits the ground is 42.05 m/s

3 0
3 years ago
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