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mel-nik [20]
3 years ago
5

1 point

Physics
1 answer:
Anettt [7]3 years ago
6 0

Answer:

6 hours

Explanation:

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Waves of wavelength 24 cm and amplitude 3.0 em are used to create a standing wave. The distance from one node tothe next in the
NikAS [45]

Answer:

D. 12 cm

Explanation:

A node is a point on a standing wave that does not vibrate.

The nodes of a standing wave are shown in the following sketch.

The red dots are the nodes of the standing wave.

It is observed that the distance between two adjacent nodes is half the wavelength of the wave.

Therefore, if the wavelength of the wave is 24 cm, then the distance from one node to the net must be 24 / 2 = 12 cm.

Hence, choice D is the correct answer.

7 0
1 year ago
3. Why is static electricity not useful as a power
shtirl [24]
The answer is B, because all energy is released at once in static electricity.

There’s a quizlet that mentions these questions, if you are having trouble. I’d suggest to give them a look.
3 0
3 years ago
A parallel-plate capacitor is formed from two 9.1 cm-diameter electrodes spaced 1.3 mm apart. The electric field strength inside
vitfil [10]

Answer:

2.87nC

Explanation:

See attached file

6 0
3 years ago
A tank of water has a length 10.0 m, width 5.00 m, and depth 2.50 m. What the absolute pressure at the bottom of the tank?
Damm [24]

Answer:

1.28 x 10^5 Pa

Explanation:

The absolute pressure at the bottom of the tank of water is given by:

p= p_0 + \rho g h

where

p_0 = 1.03 \cdot 10^5 Pa is the atmospheric pressure

\rho = 1000 kg/m^3 is the water density

g = 9.8 m/s^2 is the acceleration of gravity

h = 2.50 m is the heigth of the column of water

Substituting into the formula, we find

p=1.03\cdot 10^5 +(1000)(9.8)(2.50)=1.28\cdot 10^5 Pa

6 0
3 years ago
The resistivity of a given wire of cross sectional area 0.7mm is 4.9*10-4mm.Calculate the resistance of 2m length of the wire
Masja [62]

Answer: 1.4\ \Omega

Explanation:

Given

Cross-sectional area A=0.7\ mm^2

Resistivity \rho =4.94\times 10^{-4}\ \Omega-mm

Length of wire l=2\ m\ or\ 2000\ mm

Resistance is given by

\Rightarrow R=\dfrac{\rho l}{A}\\\\\text{Insert values}\\\\\Rightarrow R=4.9\times 10^{-4}\times \dfrac{2000}{0.7}\\\\\Rightarrow R=1.4\ \Omega

3 0
3 years ago
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