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ZanzabumX [31]
3 years ago
12

What season is when the sun is least concentrated at the beginning of the season?

Physics
2 answers:
WINSTONCH [101]3 years ago
7 0

Answer:

Winter

Explanation:

The angle of the sun is the lowest and the Northern Hemisphere has the least amount of daylight

il63 [147K]3 years ago
6 0

Answer:

Winter because the sun is least concentrated

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We know today that atoms cannot be divided into smaller parts true or false
djverab [1.8K]
Hi , the answer is false ,atoms can be divided into smaller parts , electrons , protons and neutrons.
3 0
3 years ago
Trees, birds, and bacteria are all similar because they are all formed from —
Aneli [31]
Atoms. Atoms make every living thing
3 0
3 years ago
Canadian Olivia Oliver broke the Guinness World Record for the fastest spin on ice skates on January 2015 with an angular veloci
Shalnov [3]

Answer:

<em>a) 2.63 : 1</em>

<em>b) 143.13 rpm</em>

Explanation:

initial angular velocity ω' = 130 rpm

final angular velocity ω = 342 rpm

recall that angular momentum = ωI

where I is the moment of inertia.

for the initial spinning condition, we take moment of inertial = I'

for final spinning condition, we take moment of inertia = I

initial angular momentum = ω'I' = 130 I'

final angular momentum = ωI = 342 I

according to conservation of angular momentum, initial angular momentum must be equal to the final angular momentum, therefore

342 I = 130 I'

ratio of initial moment of inertia to final moment of inertia = I'/I

==> I'/I = 342/130 ≅ <em>2.63 : 1</em>

b) to achieve a final angular velocity of of 375 rpm, her initial velocity will have to be

2.63 = 375/ω'

ω' = 375/2.63 = <em>143.13 rpm</em>

6 0
3 years ago
The 2779-m Brooklyn-Battery Tunnel, connecting Brooklyn and Manhattan, is one of the world's longest underwater vehicular tunnel
Marina CMI [18]
For a cylinder that has both ends open resonant frequency is given by the following formula:
f= \frac{nv}{2L}
Where n is the resonance node, v is the speed of sound in air and L is the length of a cylinder.
The fundamental frequency is simply the lowest resonant frequency.
We find it by plugging in n=1:
f_0= \frac{v}{2L}=\frac{343}{2\cdot 2779}=0.062 Hz
To find what harmonic has to be excited so that it resonates at f>20Hz we simply plug in f=20 Hz and find our n:
20= \frac{n343}{2\cdot 2779} =n\cdot f_0
We can see that any resonant frequency is simply a multiple of a base frequency.
Let us find which harmonic resonates with the frequency 20 Hz:
20=n\cdot f_0\\ n=\frac{20}{0.062}=322.58
Since n has to be an integer, final answer would be 323.

3 0
3 years ago
A student pushes a laptop cart down the hallway by applying 20 Newtons force. The student pushes it 10 meters and
noname [10]

Answer:

None.

Explanation:

  • By definition, work is a process that it happens when an applied force

        causes an object to change its position, i.e. to have a displacement.

        Since the laptop cart is at rest while he stops at the water fountain, no  

       net work done is on the laptop cart.

4 0
3 years ago
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