You can match constellations to your location and the season using a.

Answer:

lado

Explanation:

because it is easy to do

Answer:

Scientists have found the reason why our body temperature is 98.6°farehenheit (37°c). Apparently it's the perfect balance as it's warm enough to prevent fungal infection but not so hot that we need to eat nonstop to maintain our metabolism. ... So we know we need a higher body temperature to ward off fungal infection.

Answer:

B

Explanation:

All the other ones are opinions or opinion based

The question that how many hours a day dolphins sleep requires the collection of data to answer it. Hence, option B is correct.

Dolphins are small-toothed cetaceans that are distinguished by their always open, curving mouths. Every ocean contains one of the 36 dolphin species. The majority of dolphins are marine mammals that inhabit the sea or coastal environments with brackish water. However, there are a few species that live in freshwater streams and rivers, including the South Asian river dolphin and the Amazon River dolphin, or boto.

The orca, the biggest dolphin, can reach lengths of more than 30 feet. The Maui dolphin, which is the smallest, is only five feet long.

Dolphins mostly consume fish and squid, which they can locate via echolocation, an inbuilt sonar system that reflects sound waves off prey to disclose details about its location, size, and shape. Up to a thousand clicking sounds can be heard every second from an echo locating bottlenose dolphin.

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Given :

Intensity, I = 1.34 kW/m².

Area, A = 3.28 m².

To Find :

Time taken to arrive.

Solution :

Power is given by :

P = I × A

P = 1.34 × 3.28 × 1000 W

P = 4395.2  W

Also, power is given by :

P = E/t

t = E/P

t = 1.73 × 10⁹ J/4395.2 W

t = 393611 s

Converting this time in second to days, we get :

t = 393611/( 24×60×60) days

t = 4.55 days.

Hence, this is the required solution.

Answer:

the height of the rooftop is approximately 16.4 meters or about 54 feet high.

Explanation:

To solve this problem, we need to use the kinematic equations of motion. We will assume that air resistance is negligible and that the acceleration due to gravity is -9.8 m/s^2.

First, we will use the initial velocity and angle of the kickball to find its horizontal and vertical components of velocity.

The horizontal component of velocity (Vx) can be found using the equation:

Vx = V * cos(theta)

where V is the initial velocity and theta is the angle of the kickball.

Vx = 15.2 m/s * cos(63 degrees)

Vx = 6.62 m/s

The vertical component of velocity (Vy) can be found using the equation:

Vy = V * sin(theta)

Vy = 15.2 m/s * sin(63 degrees)

Vy = 13.7 m/s

Next, we can use the vertical component of velocity to find the maximum height (h) reached by the kickball. We can use the following kinematic equation:

h = Vy^2 / (2 * g)

where g is the acceleration due to gravity.

h = (13.7 m/s)^2 / (2 * 9.8 m/s^2)

h = 9.47 meters

So, the maximum height reached by the kickball is 9.47 meters.

Finally, we can use the time it takes for the kickball to land on the rooftop to find the height (d) of the rooftop. We can use another kinematic equation:

d = Vy * t + 0.5 * g * t^2

where t is the time it takes for the kickball to land on the rooftop.

d = 13.7 m/s * 2.4 s + 0.5 * (-9.8 m/s^2) * (2.4 s)^2

d = 16.4 meters

Therefore, the height of the rooftop is approximately 16.4 meters or about 54 feet high.

What help do you want? If you tell, I may help you.

Answer:

Which is correct? "The answer to this question.." or "The answer of this question "?

1

Answer:

I=0.3 A

R=25 Ohm

V=?

V=IR

0.3X25=7.5

Answer:

7.5 V

Explanation:

current × resistance = voltage

Answer:

22.725

Explanation:

Working our way from right to left, 20 ohm + 1/(1/15+1/15) ohm + 20 ohm
= (40 + 15/2) ohm
= 95/2 ohm

Now, to the middle, 10 ohm + 1/(1/20+1/15) + 15 ohm
= (35 + 60/7) ohm
=  305/7 ohm

Finally, summing up the equivalent resistances along the wires connected in parallel;

1/(2/95+7/305) ohm,
which is approximately 22.725 ohm

The energy available through fusion for a 90 kg human body is approximately 5.67 x 10^13 joules. With this energy, the body could operate on fusion power for approximately 18,000 years.

Part A:

To calculate the energy available through fusion, we need to find 0.7% of the mass of the human body and convert it to energy using Einstein's famous equation E=mc^2.

Mass of the human body (m) = 90 kg

Conversion efficiency (η) = 0.7% = 0.007

Energy (E) = η * m * c^2

The speed of light (c) is approximately 3 x 10^8 m/s.

Plugging in the values:

E = 0.007 * 90 kg * (3 x 10^8 m/s)^2

Calculating:

E ≈ 0.007 * 90 kg * (9 x 10^16 m^2/s^2)

E ≈ 5.67 x 10^13 joules

Therefore, the energy available through fusion is approximately 5.67 x 10^13 joules.

Part B:

To find how long the body could operate on fusion power, we need to divide the available energy by the power consumption of the human body.

Given:

Average power of the human body (P) = 100 watts

The time (t) can be calculated as:

t = E / P

Plugging in the values:

t = (5.67 x 10^13 joules) / (100 watts)

Calculating:

t ≈ 5.67 x 10^11 seconds

To convert seconds to years, divide by the number of seconds in a year (approximately 31,536,000 seconds):

t ≈ (5.67 x 10^11 seconds) / (31,536,000 seconds/year)

t ≈ 1.8 x 10^4 years

Therefore, the body could operate on fusion power for approximately 18,000 years

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The surface temperature of a red giant is around 3,000 Kelvin, which is much lower than the surface temperature of the sun, which is around 5,800 Kelvin.

Temperature is a physical quantity that describes how hot or cold something is. It is usually measured in degrees Celsius (°C), Fahrenheit (°F), or Kelvin (K). Temperature is an important factor in many scientific and biological processes, and can affect the rate of chemical reactions, the behavior of living organisms, and the density of air. Temperature is also used to describe the intensity of heat energy, which is measured in joules or calories.

A red giant is a luminous, cool star with a surface temperature lower than that of the sun. Typically, the surface temperature of a red giant is around 3,000 Kelvin, which is much lower than the surface temperature of the sun, which is around 5,800 Kelvin.

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To find

Acceleration is a change in what quantity Over time?

Explanation

Acceleration is defined as the change in velocity with respect to time interval.

Conclusion

The required quantity is

A. speed

Given:

The mass of the ball is

The initial height of the ball is

The initial speed of the ball is

To find:

the impact speed of the ball when it strikes the ground

Explanation:

The initial potential energy of the ball is

The initial kinetic energy is

The final energy of the ball is fully kinetic energy. Let the final impact speed of the ball is

We can write, using the energy conservation principle that

Hence, the final impact speed of the ball is 46.1 m/s.

Answer:

Weight = 3217.68

Explanation:

N times Gravity = weight

Gravity= 9.81

The weight of the emperor penguin whose mass is 328 Kg on is 3214.4 Newtons.

Weight is the force exerted by the earth on an object at the surface of the earth. Mathematically -

W = m x g

where -

[m] is the mass of object

[g] is acceleration due to gravity

Given is the mass of an emperor penguin as 328 Kg.

We can write -

Mass [m] = 328 kg

Acceleration due to gravity [g] = 9.8 m/s²

Therefore, the weight of the emperor penguin will be

W[P] = m x g = 328 x 9.8 = 3214.4 Newtons

Hence, the weight of the emperor penguin whose mass is 328 Kg on is 3214.4 Newtons

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Answer:

a b c d

Explanation:

The eccentricity of the object's orbit can be determined by using the ratio of its maximum angular speed to its minimum angular speed.

Let's denote the maximum angular speed as ω_max and the minimum angular speed as ω_min. We are given that the ratio of these two speeds is n:

n = ω_max / ω_min

The angular speed (ω) is related to the angular momentum (L) and the moment of inertia (I) of the object by the equation:

L = Iω

Since the object moves in an inverse square centripetal force field, the angular momentum (L) is conserved. Therefore, we can write:

L_max = L_min

Iω_max = Iω_min

The moment of inertia (I) can be expressed as the product of the mass (m) and the square of the distance (r) from the object to the axis of rotation:

I = mr^2

Substituting this into the equation above, we get:

m(r^2)ω_max = m(r^2)ω_min

Canceling out the mass (m) and the square of the distance (r^2), we obtain:

ω_max = ω_min

This implies that the maximum and minimum angular speeds are equal, contradicting the given ratio n = ω_max / ω_min. Therefore, there must be an error in the question or the provided information.

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The distance travelled by the car after the first four hours of the trip is 370 km and the average speed for the first four hours of the trip is 92.5 kmph

v ( t ) = d ( t ) / t

v ( t ) = Velocity with respect to time

d ( t ) = Distance with respect to time

t = Time

For the first four hours, the following details are taken from the graph shown.

d ( 4 ) = 370 km

t = 4 hr

v ( 4 ) = 370 / 4

v ( 4 ) = 92.5 kmph

Average velocity can also be calculated using the formula V = ( u + v ) / 2 if the initial and final velocities are given. u represents initial velocity and v represents the final velocity.

Therefore,

Distance travelled in first 4 hours = 370 km

Average speed in first four hours = 92.5 kmph

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Một đại lượng vectơ là một lực. Đại lượng vectơ là đại lượng có cả độ lớn và hướng, như chúng ta đã dạy trong phần trước. Bạn phải xác định cả độ lớn (kích thước hoặc số) và hướng của lực tác dụng lên một vật thể để mô tả hoàn toàn nó.

Answer:

1. wisest

2. more delicious

3. majestic (not sure about this one)

4. industrious

5. happiest

B. The force of X on Y is is approximately 13 N [right].

The action-reaction forces that the blocks exert on each other is calculated as follows;

Net force on the blocks = 40 N - (8 N + 4 N) = 28 N

Total mass of the blocks = 10 kg + 5 kg = 15 kg

a = F(net)/M

a = 28 N / 15 kg

a = 1.867 m/s²

40 N - 8N - T = 10 x 1.867

T = 13.33 N

40 N - 4N - T = 5 x 1.867

T = 26.67 N

Thus, the force of X on Y is is approximately 13 N [right].

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According to Newton’s first law of motion, an object at rest will begin to move, when an unbalanced force acts upon it.

option B is the correct answer.

Newton's first law of motion, also known as the law of inertia, states that an object at rest will remain at rest, and an object in motion will continue in motion with a constant velocity unless acted upon by an external force.

In other words, an object will maintain its state of motion (whether it is at rest or moving in a straight line at a constant speed) unless a force acts upon it.

Thus, according to Newton’s first law of motion, an object at rest will begin to move, when an unbalanced force acts upon it.

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Answer:

its B

Explanation:

Answer:

False

Explanation:

A Larger pulse with more energy means that the wave has a large amplitude. As in the given question, both the waves are travelling in the same medium, hence their speeds will remain the same and therefore the larger pulse will not overtake the smaller pulse. Remember the amplitude of a wave does not affect the speed at which the wave travels.

Answer:

The photoelectric effect

The photoelectric effect supports the particle model of light. Hence option A is correct.

When a substance absorbs electromagnetic radiation, a process known as the photoelectric effect causes electrically charged particles to be discharged from or inside the material. When light strikes a metal plate, the action is frequently described as the ejection of electrons from the plate. In a more general definition, the substance may be solid, liquid, or gas, the radiant energy may take the form of infrared, visible, or ultraviolet light, X-rays, or gamma rays, and the discharged particles may include ions (electrically charged atoms or molecules) in addition to electrons. Because of the perplexing concerns it presented about the nature of light—particle versus wavelike behavior—that were eventually answered by Albert Einstein in 1905, the phenomenon was critically important in the development of modern physics.

Hence option A is correct.

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To find the key value 27, the search interval after the first pass through the while loop will be a[2] ... a[6].

To find the key value 27, we need to perform a binary search on an array of elements. In a binary search, we divide the search interval in half repeatedly until we find the key value or determine that it does not exist in the array.

The search interval after the first pass through the while loop depends on the value of the middle element in the array and whether it is greater than or less than the key value. If the middle element is greater than the key value, then the search interval is the left half of the array. If the middle element is less than the key value, then the search interval is the right half of the array.

Let's consider the given answer choices:

a[5] ...a[6]
a[6] ...a[7]
a[4] ...a[7]
a[2] ...a[6]
a[0] ...a[7]

We don't know the values of the elements in the array, so we cannot determine the search interval based on their values. However, we can determine the search interval based on the indices of the elements.

Assuming that the array has eight elements (i.e., a[0] through a[7]), the search interval after the first pass through the while loop will be a[0] ...a[7]. This is because we haven't compared the middle element (a[3]) to the key value yet, so we cannot determine whether the key value is in the left or right half of the array.

After comparing a[3] to the key value, we will determine whether the search interval is a[0] ...a[2] or a[4] ...a[7]. We will continue to divide the search interval in half until we find the key value or determine that it does not exist in the array.

The search interval after the first pass through the while loop will be a[0] ...a[7]. However, the search interval will change as we perform additional passes through the while loop and divide the array in half based on the values of the elements.

To find the key value 27, the search interval after the first pass through the while loop will be a[2] ... a[6].

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If the density of water does not vary and the vents range in depth from about 1500 m to 3200 m below the surface, then the gauge pressure at a 2452-m deep vent is 224.268 atm.

Calculation:

Step-1:

It is given that the vents range in depth from about 1500 m to 3200 m below the surface. If we are assuming that the density of water does not vary. Then it is required to calculate the gauge pressure at a 2452-m deep vent.

The gauge pressure at a particular depth of ocean water is calculated as:

\($$P=\rho g h$$\)

Here \(\rho\) is the density of water, P is the required pressure, h is the depth of water, and g is the gravitational acceleration.

Step-2:

Now we are substituting the values to calculate the pressure at the depth of 2452-m.

\($$\\\begin{aligned}\\P&=\rho gh\\&=1030 (\text{ kg/m}^3)\times 9.8 (\text{ m/s}^2)\times 2452 \text{ m}\\&=24.75\times 10^6 \text{ Pa}\times\frac{1 \text{ atm}}{10.1325 \times10^4 \text{ Pa}}\\&=224.268 \text{ atm}\\\end{aligned}\\$$\)

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The Coriolis effect, option C is the correct answer.

The Coriolis effect is a natural phenomenon that occurs when the earth's rotation speed differs at different latitudes. The equator with respect to the rotation speed of the earth at the two hemispheres. This effect makes the moving object appear to the right in the northern hemisphere and to the left in the southern hemisphere.

The Coriolis effect makes the ocean current rotate clockwise in the northern hemisphere and in the anticlockwise direction in the southern hemisphere.

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NASA just discovered that Watney is going to have a big problem with radiation overexposure.

NASA has recently discovered that Watney, the astronaut stranded on Mars, is going to face a significant problem with radiation overexposure. Radiation is a major concern for space missions, particularly those that extend beyond the Earth's protective magnetic field. On Mars, the lack of a substantial atmosphere exacerbates this issue, leaving astronauts vulnerable to high levels of radiation from solar flares and cosmic rays.

Radiation exposure can have severe consequences for human health, including an increased risk of cancer, damage to vital organs, and impairment of the immune system. The longer Watney remains on Mars, the greater the cumulative dose of radiation he will receive, putting his well-being and potential survival at risk.

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The frequency of a wave is inversely proportional to its wavelength. This means that high frequencies have short wavelengths and low frequencies have long wavelengths.

The Beam of Light or Beam of Light is a directional projection of light energy emitted from a light source. Light waves with short wavelengths and high frequencies are more energetic, so types of light such as gamma rays, x-rays, and ultraviolet are more energetic than visible light, while infrared, microwaves, and radio waves are less energetic than light in the visible spectrum.

Wavelength is the spatial period of a periodic wave, the distance over which the wave shape repeats. The shorter wavelength blue light is between 450 and 495 nanometers. Red light is long-wave with wavelengths around 620-750 nm. Blue light has a higher frequency than red light and carries more energy.

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Answer: EXPERIMENT: RED CELERY - DOUBLE CHECK-

Explanation:

Method: The experiment was conducted by mixing one teaspoon of red food coloring into water, cutting the end off the stalk of celery, putting the cut end of the celery into the glass of colored water, waiting one day, and taking the celery out of the water. The end and cross section of the celery were then observed.

Hypothesis: The hypothesis was that plants have a special pipeline that carries water from the roots to every cell in the plant.

Observation of Cross Section: The cross section of the celery showed that the red food coloring had traveled up the stem and reached all parts of the stem, including the xylem, which carries water from the roots to the stem.

Parts of Stem with Most Food Coloring: The parts of the stem closest to the bottom of the stalk, where it was in the water, had the most food coloring.

Comparison of Cross Section and Bottom of Stalk: The cross section of the celery looked similar to the bottom of the stalk, with more food coloring present near the bottom of the stem.

Agreement with John's Results: The results of the experiment agreed with John's hypothesis that plants have a special pipeline that carries water from the roots to every cell in the plant.

Conclusion: This experiment showed that water, along with the red food coloring, travels up the stem of the celery plant through a pipeline known as the xylem, proving the hypothesis that plants have a special pipeline for transporting water from the roots to every cell in the plant.