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Alecsey [184]
3 years ago
9

Someone please help I have no idea what to do​

Physics
1 answer:
castortr0y [4]3 years ago
8 0

Answer:

10⁶ or 1000000

Explanation:

<h2>formula: frequency = velocity/wavelength = \frac{3.0x10^{8} }{3.0x10^{2}}</h2><h2 /><h3>i'm not sure because the teacher probably wrote the question wrong.</h3>
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Choose the correct statement below that accurately describes the shear and normal stresses in a beam. A. Shear stresses are maxi
Scorpion4ik [409]

Answer:

A. Shear stresses are maximum at the neutral axis and normal stresses are maximum furthest from the neutral axis.

Explanation:

Normal stress :

Normal stress is defined as the stress or the restoring force that occurs on the plane when an external axial load is applied on it. For a beam the normal stress is maximum at the point furthest from the neutral axis and is zero at the neutral axis of the beam.

Shear stress :

Shear stress is a stress which occurs when the force acts on the surface of the member in a parallel direction. It changes the shape of the member.  For a beam, the shear stress is maximum at the neutral axis.

6 0
3 years ago
a blackbody is at temperature of 500°C . What would be its temperature in Kelvin for it to radiate twice as much energy per seco
Firdavs [7]

Answer:

773.15K

Explanation:

Temperature is measured in different units, however, the standard or absolute temperature unit is Kelvin (K).

To convert the temperature of a black body, which is 500°C to Kelvin, we use;

T(K) = T(°C) + 273.15

T(K) = 500°C + 273.15

T(K) = 773.15K

Hence, the temperature of the blackbody at 500°C will be 773.15 K for it to radiate twice as much energy per second.

3 0
3 years ago
Newton’s Second law of Motion (F = ma) is one of the basis of forces and motion. How is it very similar to his First law and why
koban [17]

Answer:

First law can be deduced from second law.

Acceleration may determine the position and velocity of the system.

Explanation:

When net force is zero, the second law is 0 = ma, or the motion is at constant speed. Thus first law establishes that when there are no forces, the object moves at constant speed, so first law is explained by using the second.

If you determine the acceleration of a system, you may use calculus or kinematic equations to determine velocity and position of the particle and determine how it moves. This is very important in mechanics and engineering, for example, for spacecrafts, forensic situations, etc.

4 0
3 years ago
Whats a good air time and maximum height
serg [7]

Answer: Time to reach max. height is the time taken by it to reach the topmost position whereas time of flight is the overall time taken by it, i.e. till it reach down back to the thrower or launcher. And also time of flight is double the time to reach maximum height.

Explanation:

5 0
3 years ago
5 uses of mechanical energy​
Oksi-84 [34.3K]

Answer: The 5 uses of mechanical energy are: 1) Hammering a nail

2)  Using Dart gun 3) Moon 4) Hydropower plant 5) Sharping a pencil.

8 0
3 years ago
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