A physics teacher asks her students to draw a picture to illustrate the forces at work when someone throws a ball into the air. This strategy should do two things to help students remember the forces involved) In particular, it should encourage students to engage in both:

The electron's motion can be described as a combination of constant-speed horizontal motion and gravity-influenced vertical motion. The vertical motion can be described using the following equation:

y = v₀t + (1/2)gt²

where y represents vertical displacement, v0 represents initial vertical velocity (0 m/s), t represents the time elapsed, g represents gravity's acceleration (9.8 m/s²), and t represents the time elapsed.

Because the electron moves horizontally at a constant speed, its horizontal distance can be expressed as:

x = vt

where v denotes horizontal velocity (1.5 x 10(6) m/s).

We can use the relationship between horizontal and vertical distances to calculate the time elapsed:

35 cm = 0.35 m x = vt

t = x / v

Plugging in the values:

t = 0.35 m / (1.5 x 10⁶ m/s)

Substituting the time elapsed into the equation for the vertical displacement:

y = v₀t + (1/2)gt²

y = 0 m/s + (1/2)(9.8 m/s²)(t²)

So the electron will fall a distance of y in the vertical direction before hitting the screen.

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9 ma at 1.9 v for 382 h (under other test conditions, the battery may have other ratings).The battery stores approximately 0.0066366 kJ of total energy.

The total energy stored in the battery can be calculated by multiplying the current (I) by the voltage (V) and the time (t) for which the battery is used. In this case, the current is 9 mA (0.009 A), the voltage is 1.9 V, and the time is 382 hours.
To calculate the total energy (E), we can use the formula:
E = I * V * t
First, we need to convert the current from milliamperes to amperes:
Current = 9 mA = 0.009 A
Now we can calculate the total energy:
E = 0.009 A * 1.9 V * 382 hours
To convert the energy from joules (J) to kilojoules (kJ), we divide the result by 1000:
E = (0.009 A * 1.9 V * 382 hours) / 1000
Simplifying the equation, we get:
E = 0.0066366 kJ
Therefore, the total energy stored in the battery is approximately 0.0066366 kJ, rounded to two decimal places.
In conclusion, the battery stores approximately 0.0066366 kJ of total energy.

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Answer:heart

The hardest working muscle is the heart. It pumps out 2 ounces (71 grams) of blood at every heartbeat. Daily the heart pumps at least 2,500 gallons (9,450 liters) of blood. The heart has the ability to beat over 3 billion times in a person's life.

Explanation:hope this helps

Answer:

KE=800,000

Explanation:

The formula for kinetic energy is KE=1/2mv^2 or Kinetic Energy= 0.5*mass*velocity^2

so 1000 is the mass and 40 is the velocity

KE=0.5*1000*40^2

KE=0.5*1,000*1,600

KE=800,000 Joules

Momentum is doubled when the available kinetic energy is quadrupled.

This is because momentum is directly proportional to the square root of kinetic energy, so if the kinetic energy is increased by a factor of 4, the momentum will be doubled.

The mathematical relationship between momentum and kinetic energy.

The equation for kinetic energy is

\(KE = \frac{1}{2} mv^2\), where m is mass and v is velocity.

The equation for momentum is \(p = mv\), where p is momentum.

If we assume the mass to be constant, we can rewrite the equation for kinetic energy as

\(KE = \frac{1}{2} \frac{p^2}{m}\).

We can then rearrange this equation to solve for p: \(p = \sqrt{2mKE}\).

From this equation, we can see that momentum is directly proportional to the square root of kinetic energy.

If the kinetic energy is increased by a factor of 4, the square root of kinetic energy will be doubled, and therefore the momentum will also be doubled.

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Answer:

A

The upthrust on a floating body is in upwards direction and is equal to the weight of the liquid displaced

B

The upthrust is directly proportional to the density of the liquid in which the solid is immersed

C

The upthrust is directly proportional to the volume of the fluid displaced by a solid

The upthrust acts on the body in upward direction at the center of buoyancy.

Upthrust is equal to the weight of liquid displaced by object and weight of liquid will depend on its density.

Upthrust is F=Vρg ,where V is the volume of liquid displaced and ρ is the density of fluid.

The total lateral pressure acting on an immersed object on one side is equal and in opposite direction to the total lateral pressure acting on the other side.

Answer: .500

Explanation: 9.00 over 18.00 is 9 divided by 18 is .5

Answer:

1m/s

Explanation:

D = 22m

T = 22s

S = 22÷22

= 1 m/s

Answer:

1. The wave created is a transversal wave because the medium goes up and down. (I used what someone put in the comments because it's correct.)

2. 20 Meters

3. 60 Hz (Hertz)

4. 1200m/s

Explanation:

Not sure if all of this is correct, but I did this assignment so..

Please mark me brainliest. I answered all questions.

a) The wavelength of a 2.4 GHz sine wave is approximately 4.92 inches. And, b)  the most efficient length in inches for a monopole antenna transmitting at 2.4 GHz is approximately 1.23 inches.

To find the wavelength of a sine wave, we can use the formula:

wavelength = speed of light / frequency

(a) First, let's convert the frequency from GHz to Hz:

2.4 GHz = 2.4 × 10^9 Hz

Next, we need to convert the speed of light from meters per second to inches per second. The speed of light is approximately 2.998 × 10^8 meters per second, which is approximately 1.18 × 10^10 inches per second.

Now we can calculate the wavelength:

wavelength = (1.18 × 10^10 inches per second) / (2.4 × 10^9 Hz)

wavelength ≈ 4.92 inches

Therefore, the wavelength of a 2.4 GHz sine wave is approximately 4.92 inches.

(b) The most efficient length of a monopole antenna is usually a quarter-wavelength or a multiple of a quarter-wavelength. To determine the most efficient length for a monopole antenna transmitting at 2.4 GHz, we divide the wavelength by 4:

Efficient length = wavelength / 4

Efficient length ≈ 4.92 inches / 4

Efficient length ≈ 1.23 inches

Therefore, the most efficient length in inches for a monopole antenna transmitting at 2.4 GHz is approximately 1.23 inches.

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Answer:

Gamma

Explanation:

Alpha particles are similar to Helium particles, which have a mass of 4.

Beta particles are electrons, and they have a mass of 1/1836, a charge of -1.

Protons have a charge of +1 and a mass of 1.

Gamma emission is in waves, not particles, so they have no mass and no charge.

Gamma particle has no mass or charge. Hence option C is correct.

A gamma ray, commonly known as gamma radiation (symbol or gamma), is a kind of electromagnetic radiation that is produced by the radioactive disintegration of atomic nuclei. It is made up of electromagnetic waves with the smallest wavelengths, which are often shorter than those of X-rays. It gives the most photon energy at frequencies exceeding 30 exahertz (31019 Hz). Paul Villard, a French scientist and physicist, discovered gamma radiation in 1900 while researching radium radiation. Ernest Rutherford dubbed this radiation gamma rays in 1903 because of its comparatively significant penetration of matter; in 1900, he named two less penetrating forms of decay radiation (discovered by Henri Becquerel) alpha rays and beta rays in ascending order of penetrating strength.

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Explanation:

The velocity of an object can be found by using the formula

\(v = \frac{d}{t} \\ \)

d is the distance

t is the time taken

From the question we have

\( v = \frac{10}{5} \\ \)

We have the final answer as

Hope this helps you

A hydraulic press may be utilized to tear down and reassemble the transmission for service.

A hydraulic press is a powerful tool that uses hydraulic pressure to apply force to an object. It can be used to press bearings and other components out of the transmission housing, as well as to press them back in during reassembly. A hydraulic press may be utilized to tear down and reassemble the transmission for service.

Dial indicators, bearing splitters, and snap ring pliers are also common tools used in transmission service, but they are typically used for specific tasks such as measuring clearances, removing bearings, or removing snap rings.

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the answer is WE GO DOWN 89W8 >#*#,'

The Debye approximation is a model used to describe the thermodynamic properties of a solid as a function of temperature.

It assumes that the vibrations of the atoms in the solid can be treated as phonons, which are quantized units of sound energy. The Debye model is based on the assumption that the density of phonon states is constant and that the speed of sound is independent of frequency.

(a) The partition function Z is given by:

Z = e^(-E/kT) + e^(-(E + ħω)/kT) + e^(-(E + 2ħω)/kT) + ...

where E is the ground state energy and ω is the angular frequency of the phonon modes. In the Debye approximation, the sum over all possible phonon modes is replaced by an integral:

Z = V(4π/3)(kT/ħω_D)^3 ∫0^(ω_D/kT) x^2/(e^x - 1)dx

where V is the volume of the solid and ω_D is the Debye frequency, which is a characteristic frequency of the solid.

(b) The mean energy Ē can be obtained by taking the derivative of the partition function with respect to temperature:

Ē = - (∂ ln Z)/(∂β)

where β = 1/kT. Using the Debye approximation for Z, we can show that:

Ē = (3/2)kT + 9Nħω_D/8e^(βħω_D) - (9Nħω_D/8)

where N is the number of atoms in the solid.

(c) The entropy S can be obtained from the partition function:

S = -k(∂ ln Z)/(∂T) + k ln Z

Using the Debye approximation for Z, we can show that:

S = (3/2)Nk + (9Nħω_D/8kT)e^(βħω_D)/(e^(βħω_D) - 1) - Nk ln (V/N(4π/3)(kT/ħω_D)^3)

where the first term is the classical entropy contribution, the second term is the vibrational entropy contribution, and the third term is the configurational entropy contribution.

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Answer:

yes

Explanation:

weight depends on the strength of gravity, so on a different planet, or on the moon for example, things would have a different weight but have the same mass.

The diameter of the coin at the Death Valley is 13.8 x 10⁻⁶m.

The diameter of the coin at the mountains of Greenland is 37.1 x 10⁻⁶m.

Diameter of the U.S penny, d₀ = 1.9 x 10⁻²m

Temperature, T₀ = 20°C = 293 K

Coefficient of linear expansion, α = 2.6 x 10⁻⁵K⁻¹

A) Temperature at Death Valley, T = 48°C = 321 K

So, the diameter of the coin at the Death Valley is given by,

d = α x d₀ΔT

d = 2.6 x 10⁻⁵x 1.9 x 10⁻² x (321 - 293)

d = 13.8 x 10⁻⁶m

B) Temperature at the mountains of Greenland, T = -55°C = 218 K

So, the diameter of the coin at the mountains of Greenland is given by,

d = α x d₀ΔT

d = 2.6 x 10⁻⁵ x 1.9 x 10⁻² x (293 - 218)

d = 37.1 x 10⁻⁶m

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Answer: Jay

Explanation:

1 km in .1 hours is the same as 1 km in 6 minutes

1/4 km in .05 hours is the same as 1/4 km in 3 minutes or 1 km in 12 minutes

The choose C. 1.33

Tanθ =opposite / adjacent

Tanθ =20/15

Tanθ =1.33

I hope I helped you^_^

The amount of work that must be done on the bungee cord to stretch it 18.0 m is 33.93 kJ.

To determine how much work must be done on the bungee cord to stretch it 18.0 m, we need to use the formula for work:
W = ∫F(x)dx
Since the elastic force of the bungee cord is nonlinear, we cannot simply use the formula W = (1/2)kx^2, where k is the spring constant and x is the displacement. Instead, we need to use the given formula for F(x) = k1x + k2x^3, where k1 = 209 N/m and k2 = -0.240 N/m^3.
First, we need to find the equation for the total force exerted on the cord at a distance of x:
F_total(x) = k1x + k2x^3
Next, we can integrate this equation from 0 to 18.0 m to find the work done on the cord:
W = ∫F_total(x)dx from x = 0 to x = 18.0 m
W = ∫(k1x + k2x^3)dx from x = 0 to x = 18.0 m
W = [(1/2)k1x^2 + (1/4)k2x^4] from x = 0 to x = 18.0 m
W = [(1/2)(209 N/m)(18.0 m)^2 + (1/4)(-0.240 N/m^3)(18.0 m)^4] - [(1/2)(209 N/m)(0)^2 + (1/4)(-0.240 N/m^3)(0)^4]
W = 33,930 J or 33.93 kJ
Therefore, the amount of work that must be done on the bungee cord to stretch it 18.0 m is 33.93 kJ.

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The total mass of water vapor stored in the atmosphere at any one moment is a relatively small fraction of the world's supply of precipitation.

This is because the atmosphere can hold only a limited amount of water vapor compared to the total amount of water available on Earth. The majority of Earth's water is found in the oceans, lakes, rivers, and underground reservoirs.

The amount of water vapor in the atmosphere can vary depending on factors such as temperature, humidity, and weather patterns.

However, even at high humidity levels, the mass of water vapor in the atmosphere is still significantly less than the total amount of precipitation that occurs worldwide, which includes rainfall, snow, and other forms of precipitation.

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Answer:

need Read this excerpt from "Not a Dove, But No Longer a Hawk."

Despite these misgivings, I do not see how we can do anything but continue to prosecute the war. We can and should limit the violence and the suffering being inflicted on the civilians as much as possible, but for whatever reasons, successive Administrations in Washington have carried the commitment in Vietnam to the point where it would be very difficult to prevent any precipitate retreat from degenerating into a rout. If the United States were to disengage from Vietnam under adverse conditions, I believe that the resulting political and psychological shockwaves might undermine our entire position in Southeast Asia.

Which statement best describes the paradox in this excerpt?

The author acknowledges that civilians should not suffer, but states that the civilians must retreat.

The author suggests that the administrators in Washington are busy making policies while overlooking the need to end the war.

The author acknowledges that the violence should stop, but admits that a retreat might have dire consequences.

The author suggests that the Vietnamese people are counting on US support, though their political ideals are not democratic.

Explanation:

1. The "N down" and "N down hi" runs are different because the magnets were aligned differently. This doesn't change the area under the curve because the total number of counts is conserved.

2. The "N down" and "N to S" data are different because the magnetic field direction is different. The "N to S" data has a lower count rate because some of the neutrons are absorbed by the sample holder.

3. The "N to N" data in Table 1 are different because the two magnets were not equally strong.

The explanation to the above given answers are written below,

1. The "N down" and "N down hi" runs are different because the magnets were aligned differently. "N down hi" has a stronger magnetic field than "N down".

However, the total number of counts is conserved because the number of neutrons detected is proportional to the number of neutrons incident on the detector, which is independent of the magnetic field strength. Therefore, the area under the curve is the same.

2. The "N down" and "N to S" data are different because the magnetic field direction is different. "N to S" has a lower count rate because some of the neutrons are absorbed by the sample holder before reaching the detector. In "N down", the neutrons pass through the sample holder without being absorbed.

3. The "N to N" data in Table 1 are different because the two magnets were not equally strong. The magnetic field strength affects the number of neutrons that are reflected back to the detector.

A stronger magnetic field will reflect more neutrons than a weaker magnetic field. Therefore, if the two magnets have different strengths, the number of counts will be different for each magnet.

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Answer:

3N to the right

Explanation:

The speed of the electron after the collision is 5.01 x 10⁶ m/s.

To determine the new speed of the electron, we can use the principle of conservation of energy and momentum, which states that the total energy and momentum of the system before and after the collision must be equal.

We can start by calculating the initial kinetic energy (KE₁) and momentum (p₁) of the electron before the collision:

KE₁ = (1/2)mv² = (1/2) x 9.11 x 10⁻³¹ kg x (5.00 x 10⁶ m/s)² = 1.14 x 10⁻¹⁸ J

p₁ = mv = 9.11 x 10⁻³¹ kg x 5.00 x 10⁶ m/s = 4.56 x 10⁻²⁴ kg m/s

Since the atom is initially at rest, its initial kinetic energy and momentum are both zero.

After the collision, the electron will have a new speed (v') and the atom will be in a higher energy state. Let's denote the final kinetic energy of the electron as KE₂ and the final momentum as p₂.

The total energy before the collision is equal to the total energy after the collision. Therefore:

KE₁ = KE₂ + 4.00 eV

Converting the energy of the excited state from eV to Joules:

4.00 eV x 1.60 x 10⁻¹⁹ J/eV = 6.40 x 10⁻¹⁹ J

Substituting in the values:

1.14 x 10⁻¹⁸ J = KE₂ + 6.40 x 10⁻¹⁹ J

Simplifying:

KE₂ = 4.00 x 10⁻¹⁹ J

The total momentum before the collision is also equal to the total momentum after the collision. Therefore:

p₁ = p₂

Substituting in the values:

4.56 x 10⁻²⁴ kg m/s = 9.11 x 10⁻³¹ kg x v'

Solving for v':

v' = p₁ / m = (4.56 x 10⁻²⁴ kg m/s) / 9.11 x 10⁻³¹ kg

= 5.01 x 10⁶ m/s

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