Answer:5290m or 5.3km
Explanation:
The sound swirls out according to law of inverse square.
Which means the intensity is inversely proportional to square of the distance :
That is
I ∝ 1/d²
this is then,
I = k/d²
Given that
d=1.00m, I = 2.80×10⁻⁵ W/m².
We have
k = Id² = 2.80×10⁻⁵ x 1.00² = 2.80×10⁻⁵ W
(But k = power output of the bird.)
Human hearing limit is usally taken as an intensity of 10⁻¹² W/m². The distance that gives this intensity is calculated as follows:
I = k/d²
10⁻¹² = 2.80×10⁻⁵ / d²
d² = 2.80x10⁷
d = 5290m (to 3 sf)
=5.3km
Answer:
12.65 m/s
Explanation:
When friction is ignored, if the car travels from 18m hill to the bottom of the hill, afterwards it travels up to a 10m hill, then overall it has traveled a distance of 18 - 10 = 8 m vertically.
If the car starts from rest, then its potential energy is converted to kinetic energy:
where m is the car mass and h is the vertical distance traveled, v is the car velocity at 10m hill
Let g = 10m/s^2. We can cancel m from both sides of the equation:
Answer:
kinetic
Explanation:
kinetic energy is powered by motion or gravity the steeper the hill is the faster a ball will roll
Here are the three observable facts that are explained by the nebular theory:
1) Planets all rotate in the same direction
2) Planets all orbit in within 6 degrees of a common plane
3) Planets within the orbit of the Asterioid Belt (terrestrial planets) are rocky while those outside it are gaseous.
Here are the missing statements and its appropriate labels:
all 6 of stars terrestrial planets have a moon as large as earth's moon - NOT CONSISTENT WITH THE THEORY
<span>a star is surrounded by a disk of gas but has no planets - CONSISTENT WITH THE THEORY</span>
<span>a star has 20 planets - CONSISTENT WITH THE THEORY</span>
<span>a stars 5 terrestrial planets orbit in the opposite direction of its 3 jovian planets - NOT CONSISTENT WITH THE THEORY</span>
<span>beyond its jovian planets, a star has two ice-rich objects as large as mars - CONSISTENT WITH THE THEORY</span>
<span>of a stars 5 terrestrial planets, 1 has a moon as large as earth's moon - CONSISTENT WITH THE THEORY</span>
<span>a stars 4 jovian planets formed in its inner solar system and its 4 terrestrial planets formed farther out - NOT CONSISTENT WITH THE THEORY</span>
<span>a star has 9 planets, but none orbit in close to the same plane - NOT CONSISTENT WITH THE THEORY</span>
Answer:
The moons of the outer planets are made of a mixture of ice and rock but our moon is made of only rock
Explanation:
When it comes to moon the elements silicon, iron & oxygen are classified as rocky materials and the elements carbon, nitrogen & Oxygen-Hydrogen compounds are classified as icy materials.
Our moon is primarily made of Silicon, aluminum, iron, calcium and iron.
Moons of outer planets are made of both icy materials and rocky materials.