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BlackZzzverrR [31]
2 years ago
5

1) Which area of this sound wave represents a compression? Α)Α B) B C) С D) D

Physics
1 answer:
Ymorist [56]2 years ago
5 0

Answer:

C) С

Explanation:

'C' and 'E' are compressions.

'A' and 'D' are rarefactions.

have a good Day!

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A rocket, weighing 4.36 x 10^4 N, has an engine that provides an upward force of 8.90 x 10^5 N. It reaches a maximum speed of 86
Pavel [41]

The net force on the rocket is  846400 N.

Answer:

Explanation:

It is known that weight is the influence of gravitational force acting on any mass of the object. So in the present case, the weighing force given is equal to the gravitational force acting on the rocket. Thus, the gravitational force will be acting towards downward direction. But an upward force is required by the rocket for thrusting purpose and that force is given as upward force. So the net force acting on the rocket is the vector addition of all the forces acting on the rocket. As in this case, only upward and downward force is acting on the rocket. The vector addition will be equal to subtraction of downward acting gravitational force from upward force or force provided by engine.

Net force = Engine force - Gravitational force = 890000-43600=846400 N

So the net force acting on the rocket is 846400 N.

8 0
3 years ago
A sledgehammer hits a wall. How do the hammer and the wall act on each other? (1 point)
stellarik [79]

Answer:

The hammer and the wall exert forces on each other that are equal in magnitude but in opposite directions.

Explanation:

currently doing corrections on the test!

:)

5 0
3 years ago
A solid concrete block weighs 140 N and is resting on the ground. Its dimensions are 0.370 m x 0.150 m x 0.0820 m. A number of i
belka [17]

Answer: 18 blocks in total ( 17 add to the original in contact with the ground)

Explanation:

The pressure on the face in contact with the ground ( we choose the face 0.15m x 0.082m)

Pressure= Force ( weigth) /Area

1 Atm = 101325 Pascal [N/ m^2]

5 0
3 years ago
A book 15.6 cm tall is 28.7 cm to the left of a plane mirror. What is the height of the image formed?
Ira Lisetskai [31]

Answer:

15.6cm

................

3 0
3 years ago
Choose only one correct option. Explanation needed.
Mama L [17]

Answer:

\large \boxed{\mathrm{C. \  \  \frac{500}{7 \times 15  \times 8} \ g/cm^3 }}

Explanation:

\displaystyle \sf Density = \frac{mass}{volume}

\displaystyle \rho = \frac{m}{V}

\sf mass=500 \ g

\sf volume \ of \ a \ cuboid=width  \times length  \times height=( 7 \times 15 \times 8) \ cm^3

\displaystyle \rho = \frac{500}{7 \times 15  \times 8}

7 0
3 years ago
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