How do you convert 1440 am (amplitude modulation) to hertz (hz)?

About 96 percent of the universe is empty which can't be seen by the scientists.

All the stars, planets and galaxies that can be seen today make up about 4 percent of the universe while on the other hand, the 96 percent is made of materials that astronomers can't see or detect because they are dark in colour. Four percent of the universe can be seen by the scientist due to presence of universe whereas 96 percent of the universe is empty which can't be seen by the scientists.

So we can conclude that 96 percent of the universe is empty which can't be seen by the scientists.

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The change in his internal energy for all these activities performed by the  65-kg man is -435 kJ.

To calculate the change in his internal energy for all these activities, we use the formula; ΔE = (P)(Δt)

where P = power expended, and Δt = time

The formula states that the internal energy change is proportional to the time spent and the power expended by an individual during the activity. Using the data in the table, the metabolic rates for light activity and moderate activities are 4.2 kJ/min and 11.1 kJ/min, respectively, assuming that the man's mass is 65 kg.

Arranging the given data from the problem in the table below.

Activity Power, P (kJ/min)

Time, Δt (h)

Energy, ΔE (kJ)

Sleeping0.89.80

Light Chores4.22.5(4.2)(150)

Walking Slowly4.21.4(4.2)(84)

Jogging Moderately11.10.2(11.1)(12)

Sum 435. Note that the negative sign indicates that the man's internal energy decreased by 435 kJ during the activities.

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Answer:  Size of the training data. It is usually recommended to gather a good amount of data to get reliable predictions. Accuracy and/or Interpretability of the output. Speed or Training time. Linearity. The number of features.

Answer:

B) a leaf blown from a tree by the wind

Answer:

the answer is B A leaf being blown from a tree by the ground

Answer:

30 J

Explanation:

You have to transform g in kg, so 600 g=0,6 kg

the kinetic energy value is

K= ½ mv² so it is K=½ (0.6×100)=30 J

\(\text{Kinetic energy,}\\\\~~~~~~E_k = \dfrac 12 mv^2\\\\~~~~~~~~~~=\dfrac 12 \times 6\times 10^{-1} \times 10^2~~~~~~~;[m = 600 g = 600 \times 10^{-3}~ \text{kg} = 6\times 10^{-1}~ \text{kg}]\\\\~~~~~~~~~~=\dfrac{60}2\\\\~~~~~~~~~~= 30~ J\)

Answer:

Explanation: the coldest

Mercury is the warmest planet in the solar system due to its heavy covering of dioxide and other hot gases that block the sun's heat from reaching it.

Describe planet.

- Definition, Information About, Our Solar System Describe Planet. Planet literally translates to "wanderer." This is due to the fact that the planets do seem to drift aimlessly through the night sky. Although the stars appear stationary in relation to one another, they do migrate across the sky from east to west.

What purpose does a planet serve?

A planet, it was claimed, must accomplish three things. It may seem evident at first that it must orbit the sun. Second, it needs to be large enough for gravity to pull into a spherical shape.

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The general statement describing the relationship between the rate of change of the cart's velocity and the frictional force acting on the cart is that the frictional force is directly proportional to the rate of change of the cart's velocity.

Frictional force opposes the motion of an object and acts in the opposite direction to its velocity. When a cart is experiencing friction, the force of friction slows down the cart and reduces its velocity. The rate of change of velocity, which is the acceleration, is directly related to the frictional force.

According to Newton's second law of motion, the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. In the case of a cart experiencing friction, the net force is the difference between the applied force (such as pushing or pulling) and the frictional force. Since friction opposes the motion, the net force decreases, resulting in a lower acceleration and a slower rate of change of velocity.

Therefore, as the frictional force acting on the cart increases, the rate of change of the cart's velocity decreases. Conversely, if the frictional force decreases, the rate of change of velocity increases, allowing the cart to accelerate more quickly.

It's important to note that the relationship between the rate of change of velocity and frictional force may vary depending on other factors such as the mass of the cart, the nature of the surface, and the presence of other external forces. However, in general, the frictional force and the rate of change of velocity are inversely related, with an increase in friction leading to a decrease in acceleration and vice versa.

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Answer:

2

Explanation:

just took the assignment

According to the principle of conservation of momentum, the momentum of the bouncing ball changes.

Also, the ball bounces less than its original height because some energy is lost due to heat, friction and air resistance.

The principle of conservation of momentum states that for any collision occurring in an isolated system, momentum is conserved.

a. For a body such as a ball dropped from a height, the total momentum  is conserved.

However, there is a change in momentum of the ball as some of its momentum is transferred to the earth.

b. When the ball a ball of mass M is released from a height H1, it bounces to a height H2, which is about 1/2 of H1.

The value of H2 is less than that of H1 because some of the energy is converted to heat energy due to friction and air resistance, thereby its energy is less than its original value.

Therefore, the momentum of the bouncing ball is changes. Also, the ball bounces less than its original height because some energy is lost due to heat, friction and air resistance.

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If the vector C = A - B, then circumstances is the length of C equal to the sum of the lengths of A and B, then correct circumstance is option (1) When A and B are parallel

The length of vector C is given by the magnitude of the difference between vectors A and B. That is,

|C| = |A - B|

Using the triangle inequality, we have

|A - B| ≤ |A| + |B|

Therefore, the length of C can only be equal to the sum of the lengths of A and B if and only if equality holds in the above inequality. This occurs if and only if A and B are collinear and have the same direction, i.e., A and B are parallel.

Therefore, the correct answer is option (1) When A and B are parallel.

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The kinetic energy is obtained as 1960 J.

The term energy refers to the ability to do work. There are several forms of energy. However, the mechanical energy refers to the energy that is either at rest or in motion.

Now we have the mechanical energy as the sum of the potential and kinetic energy. Thus;

Mechanical energy = 3200 J

Potential energy = 1260 J

Kinetic energy = 3200 J - 1260 J

= 1960 J

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No, they do not sound equally loud. The loudness of a sound is also affected by the frequency of the sound, as well as the sound level.

The 1,000-Hz tone would sound louder than the 100-Hz tone, even though they are both at the same sound level of 70 dB. This is because the human ear is more sensitive to sounds in the frequency range of 2,000-4,000 Hz, which is where the peak of our hearing sensitivity occurs.

In this case, if we were to measure the loudness of the two tones in phons, the 1,000-Hz tone would have a higher phon value than the 100-Hz tone at the same sound level, indicating that it sounds louder to the human ear.  The loudness of a sound is typically measured in units called phon, which take into account both the sound level and the frequency response of the human ear.

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The possibilities are

The average velocity of that driver is 58 mi/h.

As per data given:

first velocity (V1) = 60 mi/h

first distance (s1) = 100 miles

second velocity (V2) = 55 mi/h

second distance (s2) = 50 miles

First, we have to find the time spend that driven in first 100 miles by calculate it as follow:

V1 = s1 : t1

60 = 100 : t1

t1 = \(\frac{10}{6}\) h

Then calculate the second condition in 50 miles:

V2 = s2 : t2

55 = 50 : t2

t2 = \(\frac{10}{11}\) h

then calculate the average velocity:

Average velocity = total distance / total time

Average velocity = 150 : (\(\frac{10}{6}\) +   \(\frac{10}{11}\) )

Average velocity = 58.2352941176

Let round the value to 58 mi/h. Hence, the average velocity of the driver is 58 mi/h

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The air mass would produce cold, dry weather in the winter is continental polar. The correct option is a.

A huge collection of air with evenly uniform degrees of temperature, humidity, and pressure.

Continental air masses which are formed cold and dry. Air mass that forms over northern Canada is known as continental polar air mass. As it moves to South, it brings dry weather like conditions in the United States.

Thus, the correct option is a.

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The energy of motion for the 2.4kg mass attached to a spring oscillating with an amplitude of 9.0cm and a frequency of 3.0Hz is approximately 1.7209 Joules.

To find the energy of motion for a 2.4kg mass attached to a spring oscillating with an amplitude of 9.0cm and a frequency of 3.0Hz, we need to calculate the maximum kinetic energy, which is equal to the maximum potential energy in this case.

Here's the step-by-step explanation:

Step 1: Convert amplitude to meters
9.0cm = 0.09m

Step 2: Calculate the angular frequency (ω)
ω = 2π × frequency
ω = 2π × 3.0Hz
ω = 6π rad/s

Step 3: Calculate the maximum potential energy (PE_max)
PE_max = 0.5 × k × \((amplitude)^2\)

Step 4: Calculate the spring constant (k) using the mass and angular frequency
ω = sqrt(k/m)
k = \(ω^2\) × m
k = (6π)\(^2\)× 2.4kg
k ≈ 424.11 N/m

Step 5: Calculate the maximum potential energy \(PE_m_a_x\)
\(PE_m_a_x\)  = 0.5 × 424.11 × \((0.09)^2\)
\(PE_m_a_x\) ≈ 1.7209 J

Therefore, The energy of motion for the 2.4kg mass attached to a spring oscillating with an amplitude of 9.0cm and a frequency of 3.0Hz is approximately 1.7209 Joules.

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Explanation:

According to the Second Law of Thermodynamics, heat will always flow spontaneously from hot to cold, and never the other way around. A refrigerator causes heat to flow from cold to hot by inputting work, which cools the space inside the refrigerator. thermal energy is transferred from the cool air inside the refrigerator to the warmer air in the kitchen. ... As a liquid, the refrigerant absorbs thermal energy from the cool air inside the refrigerator and changes to a gas.

Answer:

The answer is below

Explanation:

Charlee's law states that the volume of a gas is directly proportion to the temperature of the gas at constant pressure. That is:

V = kT, where V = volume and T = temperature, k = constant. Therefore:

V / T = k

\(\frac{V_1}{T_1}=\frac{V_2}{T_2}\)

Given that: \(V_1=3\ m^3, T_1=20^oC=(20 + 273)K=293\ k,T_2=60^oC=(60 + 273)K=333\ k.\\\\\frac{V_1}{T_1}=\frac{V_2}{T_2}\\\\\frac{3}{293}=\frac{V_2}{333} \\\\V_2=\frac{3}{293}*333\\\\V_2=3.41\ m^3\\\)

The new volume is 3.41 m³. That is it expands by 0.41 m³

Answer:

0.02484

Explanation:

Trust me bro

The final velocity of the car, given it accelerated 3.32 m/s² for a distance of 250 meters is 43.42 m/s

From the question given above, the following data were obtained:

The final velocity of the car can be obtained as illustrated below:

v² = u² + 2as

v² = 15² + (2 × 3.32 × 250)

v² = 225 + 1660

v² = 1885

Take the square root of both side

v = √1885

v = 43.42 m/s

Thus, we can conclude that the final velocity of the car is 43.42 m/s

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Answer:

i think it is B

Explanation:

Answer:

Explanation:

In physics the term velocity is always a vector.  All that means is that it's got a direction with it.  which also means this vehicle that was traveling in the east direction and then turned left is and is now ,  maybe traveling in a north direction.  Making the guesses that the car was traveling due East and is now traveling due North, then the car has changed it's velocity by 40 m/s.  By The Way do you happen to know how fast 40 m/s is?  it's about 144 Kph  :0  or about 90 MPH    so this guy is also speeding  :D,  write him a ticket ... :P

How hard you must push down on the handle is by applying a force of 215.63 N

The moment of a force about a point is the turning effect of the force about that point.

The moment of a force M = Fd where

Now, for you to lift up the car, the moment due to your force about the fulcrum, M equals the moment due to the force on back of car. M'

M = M'

FD = F'd where

Making F subject of the formula,we have

F = F'd/D

Substituting the values of the variables into the equation,we have

F = F'd/D

F = 6900 N × 0.050 m/1.6 m

F = 345 Nm/1.6 m

F = 215.625 N

F ≅ 215.63 N

So, how hard you must push down on the handle is by applying a force of 215.63 N

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Answer: The first one is A and C

Explanation:

Answer:

2 is A

3 is C

Explanation:

The reason why two is a is think of it like this. atoms have to be combined together to make a molecule. So in other words you need letters to create a word.

3 is c because in a recipe you have to have the right proportions. Just like you have to have the right proportions of atoms to create a molecule.

A defibrillator is a medical device used to deliver an electric shock to the heart in order to restore normal heart rhythm during a life-threatening condition called cardiac arrest. The power delivered by a defibrillator is typically expressed in terms of energy rather than power.

The defibrillator delivers a high-energy electric shock, measured in joules (J), to the body. The energy delivered during defibrillation is used to depolarize the heart muscles and allow the natural pacemaker of the heart to resume control over the heart rhythm.

The energy delivered by a defibrillator can vary depending on the specific device and the protocol being followed. Typically, the initial shock delivered by a defibrillator ranges from 120 to 200 joules. However, subsequent shocks may require higher energy levels.

It's important to note that the power of the defibrillator is determined by the rate at which energy is delivered. Power is the rate of energy transfer, measured in watts (W). The power delivered by a defibrillator is typically very high for a very short duration, allowing for the rapid delivery of the required energy to the heart.

Overall, while the defibrillator delivers a high-energy electric shock measured in joules, the power of the device depends on the rate at which the energy is delivered, and it is typically very high for a very short duration.

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(a) The average acceleration of the raindrop is 0.467 m/s².

(b) The average air resistance force on the raindrop is 1.4 x 10⁻³ N.

The average acceleration of the raindrop is calculated as follows;

Mathematically, the formula for average acceleration is given as;

a = Δv/Δt = v/t

where;

a = (7 m/s) / (15 s)

a = 0.467 m/s²

The average air resistance force on the raindrop is calculated as follows;

F = ma

where;

F = 0.003 x 0.467

F = 1.4 x 10⁻³ N

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Answer: Change 2 would make the lever more efficient because this would make it easier to lift.

Explanation:

The considered change is:  Make a longer lever that will require less force because it  would make the lever more efficient because this would make it easier to lift.

A beam is pivoted at a fixed fulcrum, to form a simple machine known as a lever. A body that can rotate about a point on itself is called a lever.

The lever is classified into three types based on where the fulcrum, weight, and effort are located. Additionally, leverage is a systemic mechanical advantage.

One of the six simple devices that Renaissance scientists identified. Leverage is the ability to increase an input force into a bigger output force through the use of a lever. The mechanical advantage of the lever is determined by the ratio of output force to input force.

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The average acceleration of the baseball while it is compressing the glove is 1008 10⁻³ m / s². The kinematic formula used is v² = v₀² - 2 a x.

Acceleration is the rate of change in a moving object's speed and direction over time. When a point or object accelerates or decelerates, it is moving straight forward. Motion on a circle increases despite the same speed because the direction is always changing.

Because the acceleration occurs in the opposite direction as the speed and the end speed is zero, the sign is negative.

0 = v₀² - 2 an x

a = v₀² / 2x

Consider converting the magnitudes to the SI system.

x = 2.4 mm (1 meter / 103 mm) = 2.4 103 m

Let's compute.

a = 2.2²/2 2.4 10⁻³

a = 1008 10⁻³ m / s²

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Answer:

78m

Explanation: