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vazorg [7]
3 years ago
11

5. Consider two glasses, one filled with water and the other half-full, with the water in the two glasses being at the same temp

erature. In which glass are the water molecules moving faster? In which is there greater internal energy? In which will more heat be required to increase the temperature by 1 degree C?
Physics
1 answer:
ratelena [41]3 years ago
6 0

Answer:

Explanation:

In the glass full of water, volume and therefore mass of water is more than that in  glass, half filled with water. Temperature of water is same . The velocity of molecules depend on the temperature of the material. Since temperature of water is same in both the glasses, the velocity of water molecules will be same in both the glasses.

. The internal energy per unit volume or mass  too is dependent on the temperature . Since the volume of water is more in the fully filled glass , internal energy too will be more of this glass.

Heat required to increase unit degree temperature of unit mass of any thing is called specific heat . In case of water one calorie of heat is required to increase temperature by  one degree C in mass of  one gram of water .Since,  gram of water is more in case of fully filled glass , more heat will be required to increase the temperature by one  degree C of water in fully filled glass.

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A major league baseball has a mass of 0.145 kg.
galben [10]

The momentum of the ball when it hits the ground is 4.89 kg.m/s.

The given parameters;

  • <em>mass of the baseball, m = 0.145 kg</em>
  • <em>height of fall of the ball, h = 58 m</em>

The final velocity of the ball when it hits the ground is calculated as follows;

v_f ^2 = v_0^2 + 2gh\\\\v_f^2 = 0 + 2gh\\\\v_f^2 = 2gh\\\\v_f = \sqrt{2gh} \\\\v_f = \sqrt{2\times 9.8 \times 58}\\\\v_f = 33.72 \ m/s

The momentum of the ball when it hits the ground is calculated as follows;

P = mv

P = 0.145 x 33.72

P = 4.89 kg.m/s

Thus, the momentum of the ball when it hits the ground is 4.89 kg.m/s.

Learn more here:brainly.com/question/22035809

6 0
2 years ago
A 6.0-cm-diameter horizontal pipe gradually narrows to 4.5 cm. When water flows through this pipe at a certain rate, the gauge p
Rufina [12.5K]

Answer:

0.0072 m³/s

Explanation:

Using Bernoulli's law

P₁ + 1/2ρv₁² = P₂ + 1/2ρv₂ since the pipe is horizontal

1/2ρv₂² - 1/2ρv₁² = P₁ - P₂

flow rate is constant

A₁v₁ = A₂v₂

A₁ = πr₁² = π (0.06/2)² = 0.0028278 m²

A₂ = πr₂² = π (0.0225)² = 0.00159 m²

v₁  = (A₂ / A₁)v₂

v₁  = (0.00159 m²/ 0.0028278  m²) v₂ = 0.562  v₂

substitute v₁  into the Bernoulli's equation

1/2ρv₂² - 1/2ρv₁² = P₁ - P₂

500 ( 1 - 0.3161 ) v₂²  = (31.0 - 24 ) × 10³ Pa

341.924 v₂² = 7000

v₂² = 20.472

v₂ = √ 20.472 = 4.525 m/s

volume follow rate = 0.00159 m² ×  4.525 m/s = 0.0072 m³/s

8 0
3 years ago
A box is being pulled to the right. What is the direction of the gravitational force?
ioda

Answer:

The correct answer would be downwards

Hope this helps have a good day

4 0
2 years ago
The process of sediments being compacted and cemented to form sedimentary rocks is called
crimeas [40]

Answer:

Lithification is the answer.

8 0
2 years ago
A technique in which people use machines to learn how to control their bodies is known as __________.
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Answer:

The technique in which people use machines to learn how to control their bodies is known as D, Biofeedback.

Explanation:

Biofeedback is a variety of different machines that help people learn how to control their bodies depending on their specific needs, varying from things like scalp sensors, electrocardiographs, electromyographs and more.

7 0
3 years ago
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