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valkas [14]
2 years ago
6

A scientist is measuring various properties of a sound wave. She measures the value 340 m/s. Which of the following wave charact

eristics could this value correspond to?
A.
wavelength of the sound wave
B.
period of the sound wave
C.
wave speed of the sound wave
D.
frequency of the sound wave
Physics
2 answers:
n200080 [17]2 years ago
8 0
It’s either. A or D
cluponka [151]2 years ago
8 0

Answer:

B. period of the sound wave

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A 1120 kg car traveling initially with a speed of 27.40 m/s in an easterly direction crashes into the back of a 9 490 kg truck m
asambeis [7]

Answer:

41.5 m/s

Explanation:

Since there are no external forces, momentum must be conserved.

Momentum P = mv.

Total momentum before the collision:

P = m_{car}v_{car} + m_{tru}_{ck}v_{tru}_{ck} = 1120 * 27.4 + 490 * 20 = 40.488

Total momentum after the collision:

P = 1120 * 18 + 490 * v_{tru}_{ck} = 40.488

solving for v:

v_{truck} = 41.5

8 0
3 years ago
A 3.42 kg mass hanging vertically from a spring on the Earth (where g = 9.8 m/s2) undergoes simple oscillatory motion. If the sp
sineoko [7]

Answer:

Time period of oscillation on moon will be equal to 3.347 sec

Explanation:

We have given mass which is attached to the spring m = 3.42 kg

Spring constant K = 12 N/m

We have to find the period of oscillation

Period of oscillation is equal to T=2\pi \sqrt{\frac{m}{K}}, here m is mass and K is spring constant

So period of oscillation T=2\times 3.14\times \sqrt{\frac{3.42}{12}}

T=2\times 3.14\times 0.533=3.347sec

So time period of oscillation will be equal to 3.347 sec

As it is a spring mass system and from the relation we can see that time period is independent of g

So time period will be same on earth and moon

3 0
3 years ago
What must be the distance (in meters) between a point charge q1 = 16 μC and a point charge q2 = 32 μC for the electrostatic forc
adoni [48]

Answer:

d = 0.71 meters

Explanation:

It is given that,

Charge 1, q_1=16\ \mu C=16\times 10^{-6}\ C

Charge 2, q_2=32\ \mu C=32\times 10^{-6}\ C

Electrostatic force between charges, F = 9 N

Let d is the distance between the charges. The electrostatic force between the charges is given by the product of charges and divided by square of distance between them. Mathematically, it is given by :

F=k\dfrac{q_1q_2}{d^2}

d=\sqrt{\dfrac{kq_1q_2}{F}}

d=\sqrt{\dfrac{9\times 10^9\times 16\times 10^{-6}\times 32\times 10^{-6}}{9}}

d = 0.71 meters

So, the distance between the charges is 0.71 meters. Hence, this is the required solution.

6 0
4 years ago
What laws of motion are demonstrated by a hammer pounding a nail into a board?
julia-pushkina [17]
A hammer pounding a nail into a board is an example of Newton’s Third law.

Newton’s third law states that for every action there is an equal and opposite reaction. Meaning, when you hit the hammer on the board the same amount of energy that is going into the board, is going into the hammer. Causing the hammer to bounce off the board.

Hope this helps!
6 0
3 years ago
Which of the following is considered to be a fine motor skill?
Bas_tet [7]

Answer:

drawing because Fine motor skills are the ability to make movements using the small muscles in our hands and wrists.

5 0
3 years ago
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