Answer:
Prominences
Explanation:
Their arched shapes show that they are formed of ionized gas trapped in the magnetic field. You see prominences in filtergrams as dark filaments silhouetted against the bright chromosphere.
Answer:
1.93 cm
Explanation:
The Image Equation for the first lens will be
1/f1 = 1/do - 1/d1
Where f1 = 17cm and d1 = 28.3cm
1/do = 1/f1 + 1/d1
= 1/17 + 1/ 28.3
do = 10.62cm
This image (which is real, inverted, and enlarged) becomes the object for the second lens as we again apply the Image Equation for the second lens
1/ f2 = 1/d2 + 1/d
Since the lenses are 12.8 cm apart, the image formed 10.62 cm to the left of lens #1 is located 2.18 cm to the right of lens #2 so the object distance, then, is
1/d2 = 1/f + 1/d
= 1/17 + 1/2.18
d2 = 1.93cm
Answer:
So the sound intensity level they would experience without the earplugs is 110.32dB.
Explanation:
Given data
Sound intensity by factor =215
Sound intensity level =87 dB
To find
Sound intensity level they would experience without the earplugs
Solution
First we need to find the new sound intensity level
So
The dB can be calculated as:
Substitute the given values
So the sound intensity level they would experience without the earplugs is 110.32dB.
Answer:
A. Both spheres land at the same time.
Explanation:
The horizontal motion doesn't affect the vertical motion. Since the two spheres have the same initial vertical velocity and same initial height, they land at the same time.
