at what temperature would the average velocity of helium atoms equal the escape velocity from (a) the earth

Jackie's total displacement from driving 34 miles north, 43 miles south, and then 11 miles north to her friend's house is 2 miles northward.

To get Jackie's total displacement, we must compute the net change in her position, which is the straight-line distance between her starting point and her end destination. Displacement is a vector quantity that considers both the magnitude and direction of position change.

In this case, we can represent Jackie's northward displacement as positive and her southward displacement as negative. Thus, her total displacement can be calculated as follows,

Total displacement = (final northward displacement) - (total southward displacement)

Final northward displacement = 34 miles + 11 miles = 45 miles

Total southward displacement = 43 miles

Total displacement = 45 miles - 43 miles = 2 miles (northward). Therefore, Jackie's total displacement is 2 miles northward.

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Answer:

The momentum of the steel ball is 0.28 kg m/sec.

Explanation:

The momentum of an object can be calculated using the formula: momentum = mass x velocity. In this case, the mass of the steel ball is 100 g, which is equivalent to 0.1 kg. The velocity of the ball is 2.8 m/sec. Plugging in the values into the formula, we get:

momentum = 0.1 kg x 2.8 m/sec

momentum = 0.28 kg m/sec

So the momentum of the steel ball is 0.28 kg m/sec.

The pulley system to the right will be in static equilibrium at an unknown angle of 90 degrees.

An object must satisfy two requirements of equilibrium in order to maintain static equilibrium. First, there must be no net force acting on the item. Second, there must be no net torque pulling on the object.

The 80 N weight is fastened to a freely rotating pulley in this setup.

As a result, the cable's tension is also 80 N.

The tensions' x components must be balanced against one another:

T1x = T2x

Since T1x = T1 cos(θ) and T2x = 0 (because the cable attached to the wall is vertical), we have:

T1 cos(θ) = 0

Therefore, cos(θ) = 0, which means that θ = 90 degrees.

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The value shown by the letter E is 24V.

Define resistance

A material's ability to obstruct the flow of electrical current is referred to as resistance. The capital letter R serves as a symbol for it. A conductor's ability to obstruct the flow of charges through it is referred to as resistance.

A closed loop is referred to as a circuit where electrons can move. The circuit receives power from an electricity source, like a battery. There won't be any electron movement until the circuit is finished, or until it has made a full circuit loop back to the electrical source.

V = IR

For circuit 5, V = E

I = 8A

R = 3

E = 8*3 = 24V

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Answer:

8

Explanation:

Answer:

Our kinetic energy becomes 4 times bigger

Correct option is B. The value derived for the Hubble constant from the given data is 10 km/s/Mly.

Option B states the value of the Hubble constant as 10 km/s/Mly.

To calculate the Hubble constant, we need to determine the slope of the line on the graph, which represents the ratio of recessional velocity to distance.

Let's assume we have a data point on the graph: a galaxy with a recessional velocity (v) and its corresponding distance (D).

Step 1: Calculate the slope of the line

The slope of the line represents the ratio of recessional velocity to distance:

slope = v / D

Step 2: Convert the units

In this case, the distance is given in megaparsecs (Mly), and the recessional velocity is given in kilometers per second (km/s). We need to make sure the units are consistent.

Since the Hubble constant is commonly expressed in units of km/s/Mpc (kilometers per second per megaparsec), we need to convert the distance from Mly to Mpc:

1 Mly = 3.086 × 10^19 km

1 Mpc = 3.086 × 10^22 km

Step 3: Calculate the Hubble constant

Now, we can calculate the Hubble constant using the slope of the line:

H = slope

In this case, a value of 10 km/s/Mly indicates that for every 1 megaparsec (Mly) increase in distance, the recessional velocity of a galaxy increases by 10 km/s.  In this scenario, if the data and graph provided yield a slope of 10 km/s/Mly, then that would be the derived value for the Hubble constant.

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Answer:

Ultrasound imaging (sonography) uses high-frequency sound waves to view inside the body.

Explanation:

A. carry-over effects. In an ABAB reversal design, the second "B" period is necessary to rule out carry-over effects. Carry-over effects occur when the effects of the first treatment phase (A) persist into the second treatment phase (B), or when the effects of the second phase influence the third phase (A).

By including a second "B" phase, researchers can evaluate whether the effects observed in the first "B" phase were due to the treatment or to carry-over effects.

The ABAB reversal design is a type of single-subject experimental design that involves alternating between a baseline phase (A) and a treatment phase (B) to evaluate the effects of the treatment on the target behavior. By comparing the behavior during the treatment phase to the behavior during the baseline phase, researchers can determine whether the treatment is effective. However, without a second "B" phase, it may be difficult to determine whether any changes observed in the first "B" phase were due to the treatment or to other factors, such as carry-over effects. Therefore, the second "B" phase is necessary to establish the effectiveness of the treatment and rule out potential confounding factors.

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9.87 seconds

The time required for this system to come to rest is equal to 9.87 seconds.

We have the following data:

Mass of gear A = 675 g to kg = 0.675 kg.

Radius of gear A = 40 mm to m = 0.04 m.

Mass of gear C = 3.6 kg.

Radius of gear C = 100 mm to m = 0.1 m.

How can I calculate the time needed?

We would need to figure out the moment of inertia for gears A and C in order to compute the time needed for this system to come to rest.

Mathematically, the following formula can be used to determine the moment of inertia for a gear:

I = mr²

Where:

m is the mass.

r is the radius.

We have, For gear A:

I = mr²

I = 0.675 × 0.04²

I = 0.675 × 0.0016

I = 1.08 × 10⁻³ kg·m².

We have, For gear C:

I = mr²

I = 3.6 × 0.1²

I = 3.6 × 0.01

I = 0.036 kg·m².

The initial angular velocity of gear C would therefore be converted as follows from rotations per minute (rpm) to radians per second (rad/s):

ωc₁ = 2000 × 2π/60

ωc₁ = 4000π/60

ωc₁ = 209.44 rad/s.

Also, the initial angular velocity of gears A and B is given by:

ωA₁ = ωB₁ = rc/rA × (ωc₁)

ωA₁ = ωB₁ = 0.15/0.06 × (209.44)

ωA₁ = ωB₁ = 2.5 × (209.44)

ωA₁ = ωB₁ = 523.60 rad/s.

Taking the moment about A, we have:

I_A·ωA₁ + rA∫F_{AC}dt - M(f)_A·t = 0

On Substituting the given parameters into the formula, we have;

(1.08 × 10⁻³)·(523.60) + 0.06∫F_{AC}dt - 0.15t = 0

0.15t - 0.06∫F_{AC}dt = 0.56549   ----->equation 1.

Similarly, the moment about B is given by:

0.15t - 0.06∫F_{BC}dt = 0.56549    ------>equation 2.

Note: Let x = ∫F_{BC}dt + ∫F_{AC}dt

Adding eqn. 1 & eqn. 2, we have:

0.3t - 0.06x = (0.56549) × 2

0.3t - 0.06x = 1.13098  ------>equation 3.

Taking the moment about A, we have:

Ic·ωc₁ - rC∫F_{AC}dt - rC∫F_{BC}dt - Mc(f)_A·t = 0

0.036(209.44) - 0.3t - 0.15(∫F_{BC}dt + ∫F_{AC}dt) = 0

0.3t + 0.15x = 7.5398    ------->equation 4.

Solving eqn. 3 and eqn. 4 simultaneously, we have:

x = 30.5 Ns.

Time, t = 9.87 seconds.

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Without knowing all the external forces and assuming e = 1, we cannot accurately determine the final velocities for an elastic collision.

To show that p1 + p2 = p'1 + p'2 and E = E', we can use the conservation equations for momentum and energy.

For momentum conservation:

p1 + p2 = p'1 + p'2

(m1v1 + m2v2) = (m1v'1 + m2v'2)

For energy conservation:

E = E'

(1/2)m1v1^2 + (1/2)m2v2^2 = (1/2)m1v'1^2 + (1/2)m2v'2^2

In an elastic collision, e = 1, which means that the kinetic energy is conserved. However, in this case, we cannot assume that e = 1. Therefore, the collision is not necessarily elastic and the final velocities may not be accurate.

Additionally, we also need to consider any external forces that may be acting on the system, as they can also affect the final velocities. Without knowing all the external forces and assuming e = 1, we cannot accurately determine the final velocities for an elastic collision.

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Answer:

A. Rotating Crops

Explanation:

Just took the test lets go

Based on the given options, the best method that helps to prevent wind erosion is rotating crops.

Erosion is the removal or washing away of the topmost layer of the earth by agebys of erosion.

The agents of erosion include wind, ice and water.

Wind erosion refers to erosion by wind.

Erosion by wind occurs mostly if the top layer of the eart is devoid of plants.

In order to prevent wind erosion, planting of cover crops and crop rotation is employed.

Therefore, of the given options, the best method that helps to prevent wind erosion is rotating crops.

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Maximum heigh: 1.496 m

(This number is not exacte I truncated it)

Explanation:

Data:

mass : m = 0.003 kg

spring constant : k = 220 N/m

amount of compression: x = 2 cm = 0.02 m

heigh : h = ?

accelaratiom due to gravity : g = 9.8ms^-2

Potential Energy : PE = ?

Since you'll be converting the PE to KE, you'll use 2 formulas.

Formulas:

Solution:

Explanation:

The frequency of a wave is inversely proportional to its wavelength. That means that waves with a high frequency have a short wavelength, while waves with the low frequency have a longer wavelength.

Wave A has a higher frequency, wave B must have a higher wavelength to maintain the inverse relationship. Therefore option Option B is correct.

According to the relationship between frequency and wavelength in electromagnetic waves, they are inversely proportional.

Therefore, if light wave A has a greater frequency than light wave B, light wave B will have a greater wavelength. This can be explained by the equation c = λν, where c represents the speed of light, λ represents wavelength, and ν represents frequency.

As frequency increases, wavelength decreases, and vice versa. Since wave A has a higher frequency, wave B must have a higher wavelength to maintain the inverse relationship. Therefore, the correct answer is B) Wave B.

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Your question is incomplete, but most probably your full question was,

Lightwave A has a greater frequency than light wave B. Which has a greater wavelength?

A) Wave A

B) Wave B

C) They're equal

D) Not enough info

Answer:

Mercury

Explanation:

Answer:

6 newtons

Explanation:

If it's an equal force exerted on the student's hands, the object will not move.

If a student pushes on an object with a force of 6 newtons and the object does not move then the force exerted by the object on the student’s hands would be 6 Newtons because the applied force is equal to the static frictional force until the object does not move.

Friction is a type of force that resists or prevents the relative motion of two physical objects when their surfaces come in contact

As given in the problem If a student pushes on an object with a force of 6 newtons and the object does not move then we have to find out the force exerted by the object on the student’s hands,

Force applied by the student of the object = 6 Newtons

The force exerted by the object on the student's hand = 6 Newtons

Thus, the force exerted by the object on the student’s hands would be 6 Newtons

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The centripetal acceleration of the hammer is 32 m/s².

a body moving through a circle experiences centripetal acceleration. Due to the fact that velocity is a vector quantity (i.e., it has both a magnitude, the speed, and a direction), when a body travels in a circular path, its direction is constantly changing, which causes a change in velocity, which results in an acceleration.

Toward the circle's centre, the acceleration is pointed radially. The centripetal acceleration, denoted by the symbol ac, has a magnitude equal to the square of the body's speed along the curve divided by the distance r from the circle's centre to the moving body, or ac = v2/r.

The length of the chain is: r = 1.0m

The angular speed of the hammer is: ω = 0.9 rev/s

We have given the centripetal force as

\($a_c = \frac{c^2}{r}\)

\($ =\frac{( rw)^2}{r}\)

= rw²

= (1.0)(0.9)²

= (1.0)(0.9(2π rad/1rev))²

= (1.0)(5.654867 rad/s)²

= 31.977521

≈ 32 m/s²

Thus, The centripetal acceleration of the hammer is 32 m/s².

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Venn diagram B is correct. A Venn diagram is a type of graph that uses circles to depict connections between objects or fixed groups of entities.

A Venn diagram is a diagram that uses circles to depict relationships between objects or finite groups of objects. Circles that overlap share characteristics, whereas circles that do not overlap do not.

A Venn diagram with two intersecting circles. the circle on the left is labeled transverse waves with entries light, can travel through a vacuum, vibrating string and medium motion is perpendicular.

The circle on the right is labeled longitudinal waves with entries medium motion is parallel, has regions of high and low density, sound and travel faster in a denser medium.

The overlapping region has entries, created by a disturbance, has speed, and travels through solids.

Hence Venn diagram B is correct

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Answer:

Rheostat, adjustable resistor used in applications that require the adjustment of current or the varying of resistance in an electric circuit. The rheostat can adjust generator characteristics, dim lights, and start or control the speed of motors.

Explanation:

Answer:

4 × 10^16 m

Explanation:

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

d = c × t

\(d = 3 * 10^{8} *4.3 * 365.25 * 24 * 60 60 = 4 * 10^{16} meters\)

Answer:

proxima centauri Is 40208000000000km or ( about 268.770AU.) away from our planet

The value of resistor R that gives the circuit in the figure a time constant of 22 μs is 220 Ω.

The circuit that is in the figure is shown below:Given that time constant (RC) = 22 μs. To find the value of resistor R, we need to use the formula for the time constant:

RC = τ, where R is the resistance and C is the capacitance of the circuit.

Rearranging the above formula, we get:R = τ / C

Where τ is the time constant and C is the capacitance of the circuit.

From the figure, the capacitance is given as 0.1 μF

.Substituting the values of τ and C in the above formula, we get:

R = (22 × 10⁻⁶ s) / (0.1 × 10⁻⁶ F)

R = 220 Ω

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Answer:

B. They will attract one another

Explanation:

When two pieces of silk that have acquired an electric charge are brought close together, they will either attract or repel each other, depending on the nature of the charges.

If the two pieces of silk have the same type of charge (both positive or both negative), they will repel each other. This is because like charges repel each other.

On the other hand, if the two pieces of silk have opposite charges (one positive and one negative), they will attract each other. This is because opposite charges attract each other.

Therefore, the answer is B. They will attract one another if they have opposite charges, and they will repel each other if they have the same charge.

your question seems incomplete, I think you are asking the question which is given below.

Question: As the frequency of electromagnetic waves increases, what happens to the wavelength?

when the frequency of an electromagnetic wave increases, its wavelength would decrease, according to eq (i).

speed of light = frequency X wavelength ............(i)

as the speed of light is constant in the same medium.

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According to the question, the answer of an object that becomes grounded gains neutrons during the grounding process is false.

Neutrons are subatomic particles that have no charge. They are found in the nucleus of an atom, along with protons. Neutrons exist in a variety of isotopes, meaning that some contain more neutrons than others. Neutrons are very important in determining the stability of an atom, because they affect the overall number of protons and electrons. In addition, the number of neutrons can change the properties of an element, such as its melting point and boiling point. Neutrons are also very important in nuclear reactions, such as nuclear fission and fusion. Neutrons interact with other particles through the strong nuclear force, which can cause particles to be pulled together into a nucleus.

An object that becomes grounded loses electrons during the grounding process, not neutrons.

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Isolate the variable by dividing each side by factors that don't contain the variable.

m

=

32.021

¯

3

s

Answer:

16.64 km/h

Explanation:

Think of the x and y components as the a and b sides of a triangle and simply do the Pythagorean Theorem:

\(a^2+b^2=c^2\)

\(14^2+9^2=c^2\)

\(\sqrt{196+81}=c\)

\(\sqrt{277}=c\)

\(16.64 km/h\)

Answer:

D. Karate class

D or Karate Class

Karate Class is the best way to learn discipline because you need focus to participate and need to know your surroundings which is part of discipline.

Answer:

A

Explanation:

Force =  mass x acceleration

if the force is constant for each of the boxes, the smaller a boxes mass the greater its acceleration while the force is applied

Therefore the smaller box will have a greater initial velocity and will slide the furthest before it stops.

Answer:

hello! Jaesuk~Sakai here!

Explanation:

The four group 3 elements are scandium, yttrium, lanthanum and actinium. “lanthanide” refers to the elements between lanthanum and lutetium. That term does not encompass scandium and yttrium. Scandium and yttrium act pretty much identically to lanthanides.

happy to help!!

Remember to always stay happy no matter what happens! ^^

no net force axting on it

Answer:

I think none of above

Explanation:

hioe it's right answer