Explanation:
Hope this helps,
Juno entered a polar orbit of Jupiter on July 5th 2016 UTC, to begin a scientific investigation of the planet. After completing its mission, Juno will be intentionally deorbited into Jupiters atmosphere. Junos mission is to measure Jupiters composition, gravitational field, magnetic field, and polar magnetosphere.
ANSWER and EXPLANATION
We want to classify the forces given as either external forces or internal forces.
An internal force is a force that does not change the mechanical energy of an object. In other words, these forces act between two different parts of an object.
An external force is a force that is due to an external agent acting outside of a body or system.
Therefore, going by these definitions, we see that the forces that are internal forces are:
- Shear
- Gravity
- Torsion
and the force that is an external force is:
- The force of the floor on your feet when you are standing.
Answer:
a) destructive interference occurs
Explanation:
Given that two waves are traveling towards each with same magnitude of amplitude .
As we know that when two waves are superimpose then
1. If they are traveling in the same direction then the resultant wave amplitude is higher than the amplitude of any the given wave and this is known as constructive interference.
2. If they are traveling in the opposite direction then the resultant wave amplitude is lower than the amplitude of any the given wave and this is known as destructive interference.
So the answer is a.
a) destructive interference occurs
Answer:
its center of gravity lies over its base of support.
Explanation:
An object will be stable if its center of gravity lies over its base of support.
When an object is balanced so that a displacement lowers its center of gravity, the object is said to be in stable equilibrium.
Complete question is;
A microwave oven operates at a frequency of 2400 MHz. The height of the oven cavity is 25 cm and the base measures 30 cm by 30 cm. Assume that microwave energy is generated uniformly on the upper surface of the cavity and propagates directly
downward toward the base. The base is lined with a material that completely absorbs microwave energy. The total microwave energy content of the cavity is 0.50 mJ.
Answer:
Power ≈ 600,000 W
Explanation:
We are given;
Frequency; f = 2400 Hz
height of the oven cavity; h = 25 cm = 0.25 m
base area; A = 30 cm by 30 cm = 0.3m × 0.3m = 0.09 m²
total microwave energy content of the cavity; E = 0.50 mJ = 0.5 × 10^(-3) J
We want to find the power output and we know that formula for power is;
P = workdone/time taken
Formula for time here is;
t = h/c
Where c is speed of light = 3 × 10^(8) m/s
Thus;
t = 0.25/(3 × 10^(8))
t = 8.333 × 10^(-10) s
Thus;
Power = (0.5 × 10^(-3))/(8.333 × 10^(-10))
Power ≈ 600,000 W