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polet [3.4K]
2 years ago
15

Which statements describe solstices? Select 3 correct choices. They occur when the Sun reaches its highest or lowest point in th

e sky. They affect the amount of sunlight in the Northern Hemisphere in June. They contribute to the cycling of winters all year long in the Northern Hemisphere. They influence the cycling of different seasons based on the Sun’s height in the sky. They increase the amount of rays from the Sun directly received in the Southern Hemisphere.
Physics
1 answer:
Contact [7]2 years ago
7 0

The statements that best describe solstices include:

A. They occur when the Sun reaches its highest or lowest point in the sky.

B. They affect the amount of sunlight in the Northern Hemisphere in June.

D. They influence the cycling of different seasons based on the Sun's height in the sky.

A solstice can be defined as a phenomenon in which the Sun reaches its maximum or minimum declination relative to the celestial equator on the celestial sphere, thereby, producing either the least amount of daylight time within a day or the most amount of daylight time. Also, it occurs twice in a year between June 20-22 and December 21-23.

Traditionally, solstice marks the beginning (start) of seasons such as summer and winter depending on the hemisphere.

Hence, the statements that best describe solstices include:

  • Solstices occur when the Sun reaches its highest (maximum) or lowest (minimum) point in the sky.
  • Solstices affect the amount of daylight time (sunlight) in the Northern Hemisphere in June.
  • Solstices influence the cycling of different seasons depending on the Sun's height in the sky.

Read more on solstices here: brainly.com/question/5133631

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A circuit contains a single 270-pf capacitor hooked across a battery. it is desired to store four times as much energy in a comb
yan [13]
The energy stored by a system of capacitors is given by
U= \frac{1}{2}C_{eq} V^2
where Ceq is the equivalent capacitance of the system, and V is the voltage applied.

In the formula, we can see there is a direct proportionality between U and C. This means that if we want to increase the energy stored by 4 times, we have to increase C by 4 times, if we keep the same voltage.

Calling C_1 = 270 pF the capacitance of the original capacitor, we can solve the problem by asking that, adding a new capacitor with C_x, the new equivalent capacitance of the system C_{eq} must be equal to 4C_1. If we add the new capacitance X in parallel, the equivalent capacitance of the new system is the sum of the two capacitance
C_{eq} = C_1 + C_x
and since Ceq must be equal to 4 C1, we can write
C_1+C_x = 4C_1
from which we find
C_x=3C_1=3 \cdot 270 pF=810 pF
5 0
3 years ago
Two trains leave the station at the same time, one heading east and the other west. the eastbound train travels at 95 miles per
marissa [1.9K]
The east bound train travels at a speed of 95 mile per hour and the west bound train at 75 miles per hour.
Assuming eastbound train will cover distance x then the west bound train will cover distance 272-x .
Therefore, since time taken will be the same then; x/95 = (272-x)/75
          = 75x = 95 (272-x)
          = 75x = 25840 - 95x
          = 170 x= 25840
                     x = 152 miles
Thus time taken will either be x/95 or (272-x)/75
           = 152/95
           = 1.6 hours or 1 hour 36 minutes
6 0
3 years ago
Which of the following describes the relationship between work and power?
Vinvika [58]

Answer: The answer is B

Explanation:

Work can be defined as the energy that is required to apply a force to an object in order to move it from one point to another. In physics, work = force x distance travelled. On the other hand, Power is the work done per time. In other words, it the rate at which work is done and is determined by using the formula, Power = Work/time. In these relationships, it can be seen that power is directly proportional to the amount of work done, hence as power increases, more work is done.

6 0
3 years ago
Brain surgery. Surgeons can remove brain tumors by using a cavitron ultrasonic surgical aspirator, which produces sound waves of
dmitriy555 [2]

Answer:\lambda =1.304\times 10^4\ m

Explanation:

Given

frequency of wave \nu =23\ kHz

We know velocity is given by

v=\nu \times \lambda

where \lambda=wavelength

\lambda =\frac{velocity}{\nu }

\lambda =\frac{3\times 10^8}{23\times 10^3}

\lambda =1.304\times 10^4\ m

7 0
3 years ago
A uniform magnetic field of 4.15 T points in some direction. Consider the magnetic flux through a large triangular wire loop tha
pickupchik [31]

Answer:

ФB = 4.89 W

Explanation:

In order to calculate the magnetic flux trough the triangular wire loop, you use the following formula:

\Phi_B=B\cdot A=BAcos\theta   (1)

B: magnitude of the magnetic field = 4.15T

A: area of the triangular loop

θ: angle between the normal to the surface and the direction of the magnetic field = 0°

Both direction of the magnetic field and the normal vector to the surface are parallel.

You calculate the area of the triangular loop:

A=\frac{bh}{2}   (2)

b: base = 1.65 m

h: height = \sqrt{(1.65m)^2-(\frac{1.65m}{2})^2}=1.42m

A=\frac{(1.65m)(1.42m)}{2}=1.17m^2

Next, you replace the values of A and B in the equation (1):

\Phi_B=(4.15T)(1.17m^2)=4.89W

The magnetic flux trough the triangular wire loop is 4.89W

7 0
3 years ago
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