Something plus something equals total energy

Why do I hear a loud sound when I put my ear against the wall and knock

Salsk061 [2.6K]

Explanation:

the reason you hear a loud sound when you knock on a wall and put your ear u against it is because when you knock on said wall vibrations are bouncing off of the wall there fore making that loud banging sound.

5 0

3 years ago

Using your strategy to overcome your obstacle.

USPshnik [31]

Answer:

buena suerte con las citas del futuro

Explanation:

6 0

3 years ago

Read 2 more answers

1. A 500 N force applied to a box at a 50 degree angle above the horizontal surface. Find the x and y

Alex777 [14]

Answer:

The x and y components of the 500 N-force are 321.394 newtons and 383.023 newtons, respectively.

Explanation:

At first we present a figure describing the situation explained on statement, the x and y components of the force are determined by the following trigonometric expressions:

$F_{x} = F\cdot \cos \alpha$ (1)

$F_{y} = F\cdot \sin \alpha$ (2)

Where:

$F$ - Magnitude of the force, measured in newtons.

$\alpha$ - Direction of the force above the horizontal surface, measured in sexagesimal degrees.

If we know that $F = 500\,N$ and $\theta = 50^{\circ}$ , then the components of the force is:

$F_{x} = (500\,N)\cdot \cos 50^{\circ}$

$F_{x} = 321.394\,N$

$F_{y} = (500\,N)\cdot \sin 50^{\circ}$

$F_{y} = 383.023\,N$

The x and y components of the 500 N-force are 321.394 newtons and 383.023 newtons, respectively.

7 0

3 years ago

In a manufacturing process, a large, cylindrical roller is used to flatten material fed beneath it. The diameter of the roller i

kotykmax [81]

The maximum angular speed of the roller is 3.47rad/a,

the maximum tangential speed of the point an the rim of the roller is 1.47m/s,

the time t should the driven force be removed from the roller so that the roller does not reverse its direction of rotation is t = 2.78s,

5.4 rotation has the roller turned between t=0 and the time found in part c

<h3>What does tangential speed refer to?</h3>

Any item moving along a circular path has a linear component to its speed called tangential velocity. An object's velocity is always pointed tangentially when it travels in a circle at a distance r from the center. The word for this is tangential velocity.

To calculate the tangential speed, divide the circumference by the time required to complete one spin. For instance, if it takes 12 seconds to complete one rotation, divide 18.84 by 12 to get 1.57 feet per second as the tangential velocity.

(a) angular speed w = dθ/dt = 5t - 1.8t^2

dw/dt = 5 - 3.6t = 0 for max w

so max w occurs at t = 5/3.6 s = 1.39s

so w max = 5*1.39 - 1.8*(1.39)^2 = 3.47 rad/s

(b) tangential speed v = r*w

r = D/2 = 0.5m

so v = 0.5*w = 1.74 m/s

(c) w is positive until 5t = 1.8t^2

so t = 5/1.8s = 2.78s (or t = 0 invalid)

After t = 2.87s, w is negative (starts reversing direction of rotation)

Driving force would actually have to be removed some time before t=2.78s because the roller can't stop instantaneously, but insufficient info to calculate this.

(d) Up to t = 2.78s, θ = 2.5*(2.78)^2 - 0.6*(2.78)^3 rad = 33.95 rad = 5.40 rotations

Therefore,

A) 3.47rad/a

B) 1.47m/s

C) t = 2.78s

D) 5.4 rotation

To learn more about tangential speed, refer to:

brainly.com/question/19660334

#SPJ4

4 0

2 years ago

Where do most metamorphic processes take place?

inysia [295]

Answer:

Most metamorphic processes take place deep underground, inside the earth's crust.

Explanation:

During metamorphism, protolith chemistry is mildly changed by increased temperature (heat), a type of pressure called confining pressure, and/or chemically reactive fluids. hope this helps you :)

8 0

3 years ago