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IRISSAK [1]
3 years ago
7

· sound

Physics
2 answers:
Licemer1 [7]3 years ago
7 0

Answer: C) longitudinal

Explanation: A longitudinal study is a research design that involves repeated observations of the same variables over short or long periods of time. It is often a type of observational study, although they can also be structured as longitudinal randomized experiments.

bagirrra123 [75]3 years ago
6 0

Answer: The answer is a longitudinal wave.

Explanation: Since this is a sound wave, a medium is needed in order for sound to conduct. A longitudinal wave has a direction of propagation parallel to the direction of the oscillation.

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13. A 1 kg rock is at a height of 100 meters. What is its gravitational potential<br> energy?
lozanna [386]

Answer:

P.E = 980 J

Explanation:

Given,

The mass of the rock, m = 1 Kg

The height of the rock from the ground, h = 100 m

The acceleration due to gravity, a = 9.8 m/s²

The gravitational potential energy of the stone is given by the formula

                              P.E = mgh joules

Substituting the given values in the above equation,

                              P.E = 1 x 100 x 9.8

                                   = 980 J

Hence, the gravitational potential  energy of the stone is, P.E = 980 J

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3 years ago
A student holds an ice cube in her hand. Which of the following best describes the movement of heat that will happen?
Brut [27]

Answer:

The ice will melt and her hand will get cold

Explanation:

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How long does it take for the earth to rotate once on its axis?
qaws [65]

Answer: 23 hours 56 minutes 4.091 seconds

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3 years ago
A(an) ________ complex refers to the feeling that one lacks worth and doesn't measure up to the standards of others or of societ
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Inferiority Complex

3 0
3 years ago
Read 2 more answers
When is the velocity of a mass on a spring at its maximum value?
ehidna [41]

Answer:

A.  when the mass has a displacement of zero

Explanation:

The velocity of a mass on a spring can be calculated by using the law of conservation of energy. In fact, the total energy of the mass-spring system is equal to the sum of the elastic potential energy (U) of the spring and the kinetic energy (K) of the mass:

E=U+K=\frac{1}{2}kx^2 + \frac{1}{2}mv^2

where

k is the spring constant

x is the displacement of the mass with respect to the equilibrium position of the spring

m is the mass

v is the velocity of the mass

Since the total energy E must remain constant, we can notice the following:

- When the displacement is zero (x=0), the velocity must be maximum, because U=0 so K is maximum

- When the displacement is maximum, the velocity must be minimum (zero), because U is maximum and K=0

Based on these observations, we can conclude that the velocity of the mass is at its maximum value when the displacement is zero, so the correct option is A.


8 0
4 years ago
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