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faust18 [17]
2 years ago
8

POINTS WILL BE GIVEN!! VVV SIMPLE IF YOURE A GENIUS

Physics
2 answers:
insens350 [35]2 years ago
6 0

Answer:

9

Explanation:

hope it helps

madreJ [45]2 years ago
3 0

Answer:

i dont know, I do not understand anything i.d.k

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PLS HELP! If you are given force and distance, you can determine power if you know (2 points)
Lisa [10]

Answer:

C. Time

Explanation:

6 0
2 years ago
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Question 3 of 10
Mazyrski [523]

Answer:

B . energy cannot be created or destroyed

3 0
2 years ago
What do you mean by MA of a lever is 3 , VR of a lever is 4 and efficiency of a machine is 60%​
Montano1993 [528]
Explanation:V.R of a lever is 3 means effort distance of the lever is 3 times more than the effort distance of the load. ... Efficiency of a lever is 60% means 40% of the energy is wasted due to friction as no machine is Friction less.
6 0
2 years ago
ASK YOUR TEACHER A 2.0-kg mass swings at the end of a light string with the length of 3.0 m. Its speed at the lowest point on it
Nadya [2.5K]

Answer:

  K_b = 78 J

Explanation:

For this exercise we can use the conservation of energy relations

starting point. Lowest of the trajectory

        Em₀ = K = ½ mv²

final point. When it is at tea = 50º

        Em_f = K + U

        Em_f = ½ m v_b² + m g h

where h is the height from the lowest point

        h = L - L cos 50

        Em_f = ½ m v_b² + mg L (1 - cos50)

energy be conserve

        Em₀ = Em_f

         ½ mv² = ½ m v_b² + mg L (1 - cos50)

         K_b = ½ m v_b² + mg L (1 - cos50)

let's calculate

          K_b = ½ 2.0 6.0² + 2.0 9.8 6.0 (1 - cos50)

          K_b = 36 +42.0

          K_b = 78 J

4 0
3 years ago
A thin, square metal plate measures 15 cm on each side and has emissivity of 0.80. The plate is heated to a temperature of 605°C
Sholpan [36]
L = 15cm = 0.15m
A = 0.15 × 0.15 = 0.0225
Sradiation is transfered from bottom
σ = 5.67 × 10⁻⁸ W/m²k
T = 605 c = 878k
Rate of energy transfer
Q = 
σ × A × E × T⁴
5.67 × 10⁻⁸ × 0.0225 × 2 × 0.8 × 878⁴
1792.17 W
6 0
2 years ago
Read 2 more answers
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