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3 years ago

Match the descriptions to the feature,

Physics

1 answer:

Marysya12 [62]3 years ago

4 0

Answer:

Vertex: Point where the principal axis and mirror meet

Focal point: Point we are reflected light converges or appears to diverge

Focal length: distance from the center of a mirror to the focal point

Principal axis: line that runs to the center of curvature to a mirror

Center of curvature: sensor of spherical mirror from which a curved mirror was cut

Explanation:

Just did the assignment on Edge.

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A spring with k = 53 N/m hangs vertically next to a ruler. The end of the spring is next to the 18 cm mark on the ruler. If a 2.

Anarel [89]

Answer:

1.07 m

Explanation:

x = Compression of the spring

k = Spring constant = 53 N/m

Initial length = 18 cm

P = Kinetic energy

K = Kinetic energy

At the lowest point of the mass the energy conservation is as follows

$P_{ig}+P_{is}+K_i=P_{fg}+P_{fs}+K_f\\\Rightarrow mgx+0+0=mgx+\frac{1}{2}kx^2\\\Rightarrow x=\frac{2mg}{k}\\\Rightarrow x=\frac{2\times 2.4\times 9.81}{53}\\\Rightarrow x=0.89\ m$

At its lowest position the mark on the ruler will be

$x_f=0.18+0.89\\\Rightarrow x_f=1.07\ m$

The spring line will end up at 1.07 m

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3 years ago

Number of protons and electrons and atomic mass for a given element

faltersainse [42]

Explanation:

You can simply subtract the atomic number from the mass number in order to find the number of neutrons. If the atom is neutral, the number of electrons will be equal to the number of protons.

Remember!

1. Your mass number is the total number of neutrons and protons within the atom.

2. Your atomic number is the amount of protons within the atom.

3. For neutral atoms, the electron number is the same as the atomic number.

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3 years ago

Harmonics problem. A square wave of frequency f contains harmonics (sine waves) at f, 3f, 5f, 7f, ... . Suppose a system respond

ad-work [718]

Answer:

Explanation:

If the fundamental frequency of the square wave is 10 Khz, and contains harmonics at f, 3f, 5f, etc., it will have a component at 10 Khz, other at 30 Khz, and another one at 50 Khz.
If the system responds to frequencies in the range between 20 Khz and 40 KHz only, the shape of the response will contain only a 30 Khz sine wave (3rd harmonic of 10 Khz).

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A sound technician is testing the sound acoustics in a theatre for an upcoming music concert. He sets up speakers in different l

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Consertive alex dggghh

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3 years ago

A motionless mass, hung on the end of a spring and pulled 5 cm downward, is a height of 1 meter above the classroom floor. Is th

maxonik [38]

Answer:

See the explanation below

Explanation:

After the mass is pulled, you have all three types of energy; potential, kinetic and elastic. Elastic as it has extension of the spring, potential energy as the mass is one meter above the ground level, and kinetic energy as the mass is in motion.

The following are the equations for calculating the different energies.

$E_{elas}=0.5*k*x^2\\where:\\k = spring constant [N/m]\\x = distance [m]\\\\E_{pot} =m*g*h\\where:\\m = mass [kg]\\g = gravity = 9.81[m/s^2]\\h = elevation [m]\\\\E_{k}=0.5*m*v^2\\where:\\m= mass [kg]\\v = velocity [m/s]$

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3 years ago