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dolphi86 [110]
2 years ago
10

How many cm3 are there in 1 dm3?

Physics
1 answer:
Verdich [7]2 years ago
8 0

The answer is in the picture.

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Problem 7.17 A horizontal spring with stiffness 0.8 N/m has a relaxed length of 12 cm (0.12 m). A mass of 23 grams (0.023 kg) is
Jlenok [28]

The speed of the mass v = 0.884 m/s.

<u>Explanation</u>:

Let

K1 represents the kinetic energy of the mass when it is released,

U1 represents the potential energy of the spring when the mass is released,

K2 represents the kinetic energy of the mass when the spring returns to relaxed length,

U2 represents the potential energy of the spring when the spring returns to relaxed length

The spring is stretched by 0.27 - 0.12 = 0.15 m

                                K1 = 0

                                 U1 = (1/2) \times 0.8 \times (0.15)^2

                                     = 0.009 J

                                U2 = 0

By conservation of energy,

                        K2 + U2 = K1 + U1

                           K2 + 0 = 0 + 0.009 J

                                 K2 = 0.009 J

Let v = speed of the mass

                                K2 = 1/2 \times m \times v^2

m = 23 g = 0.023 kg

                           0.009 = 1/2 \times 0.023 \times v^2

                           0.009 = 0.0115 \times v^2

                                   v = √(0.009 / 0.0115)

                                  v = 0.884 m/s.

5 0
4 years ago
1
melomori [17]

Answer:

a

Explanation:

it increases with increasing height

5 0
3 years ago
What velocity vector will move you 200 miles east in 4 hours traveling at a constant speed?
aksik [14]
The velocity vector will move you 200 miles east in 4 hours traveling at a constant speed is 50 mph. Below is the solution:

Given:
200 miles 
4 hours 

200 miles/ 4 hours = 50 mph, east

Hope it helps. 
6 0
3 years ago
The length of nylon rope from which a mountain climber is suspended has a force constant of 1.40 × 10^4 N/m .
docker41 [41]

Answer:

w = 12.5 rad/s   and A = 50 10⁻² m

Explanation:

Let's treat this problem as a case of oscillatory movement

a) The angular velocity is given by

       w² = k / m

       w = √ 1.4 10⁴/90.0

       w = 12.5 rad / s

b) It is climber falls by two meters, its mechanical energy at the highest point is

       Em = U = mgh

       Em = 90 9.8 2

       Em = 1764 J

The energy of the harmonic oscillator can be calculated

       E = ½ k A²

Where A is the amplitude of the movement. This is going to be the stretch for the mechanical energy of the fall

      A² = 2E / k

      A = √(2 1764 /1.40 10⁴)

      A = 50 10⁻² m

c) To realize this part, you must know how the force constant changes with the length, in the case of two springs joined along its axis

   1 /k equivalent = 1 / k1 + 1 / k2

4 0
3 years ago
Turbo chargers helps to increase the fuel economy? O True O False
larisa [96]

Answer:

false

Explanation:

5 0
3 years ago
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