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What steps can you take in your everyday life to properly care for your skeletal system? (Site 1)

The speed of sound on that day at the person's location is 334.78 m/s.

The speed of sound on the given day at the person's location is calculated as follows;

speed of sound = distance / time

The total distance is twice the distance from the person to the cliff.

d = 2 x 385 m

d = 770 m.

The time it takes for the sound to travel to the cliff and back (round trip) is given as 2.3 seconds.

The speed of the sound is calculated as;

speed of sound = 770 m / 2.3 s

speed of sound = 334.78 m/s

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Explanation:

light rays are reflected by mirrors.    <====that is why when you look in a mirror you see your 'reflection'

Answer:

Explanation:

In this case, gravity is pulling down on them ( both teams ), the strong - arm team is excerting thrust by trying to pull the rope, and you've got the drag of the other team pulling back.

Answer:

I'm not to sure but I think the answer is 1.5m/s^2

Explanation:

Acceleration = Change in Velocity over Time.

So we get 15 - 0.0 divided by 10.0 which = 1.5m/s^2

But again I'm no expert I'm learning this stuff just like you guys.

Answer:

2500N.

Explanation:

SEE THE IMAGE FOR SOLUTION

HOPE IT HELPS

HAVE A GREAT DAY

Explanation:

Force = mass × acceleration

Mass = 900kg

Acceleration = velocity ÷ time

Velocity = 60km/hr = 60 × 1000 ÷ 3600

Velocity = 60000 ÷ 3600

Velocity = 16.67m/s

To get the time

Velocity = Distance ÷ time

16.67 = 50 ÷ time

Cross multiply

16.67 × time = 50

time = 50 ÷ 16.67

time = 3 seconds

Acceleration = 16.67 ÷ 3

Acceleration = 5.56m/s²

Therefore, Force = 900 × 5.56

Force = 5004 Newton

Answer:

Uhm where are the questions and answers?

Answer:

Force is in lbs and distance is in ft.

W = F * d = ft-lbs       units of work

(Note - torque = F * R   normally torque is specified in "lbs-ft" to distinguish work from torque)

Answer:

I believe it's not possible

Explanation:

there's really no way I currently know of that we can do that so I suppose no.

The average acceleration of the dragster during this time interval is 41.746 m/s².

Average acceleration is the rate of change of velocity over a specific time interval. It is defined as the ratio of the change in velocity to the time interval over which the change occurs

The average acceleration of the dragster can be found using the formula:

average acceleration = (final velocity - initial velocity) / time

where the final velocity is 26.3 m/s, the initial velocity is 0 m/s (since the dragster starts from rest), and the time is 0.63 s.

Substituting the values, we get:

average acceleration = (26.3 m/s - 0 m/s) / 0.63 s

= 41.746 m/s²

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b. 1.

Explanation

Having a mechanical advantage means the force applied by the system is greater than the force you put in. In a pulley system, this means the pulley can lift the object with a greater amount of force than you apply to the rope

The mechanical advantage of a pulley is system is equal to the number of ropes supporting a movable pulley

hence, the force advantage is equal to the number of ropes

therefore

we can see the input force equals the output, so

therefore, the answer is

b. 1.

I hope this helps you

True conditions

Efficiency of Heat Exchanger are as below:

the heat exchange process between two fluids with different temperatures using solid walls occurs in various engineering applications. The tool to achieve this exchange is a heat exchanger. Some applications like air conditioning, power generation, waste heat recovery, and chemical processing use this device.

The basis of the work of a heat exchanger is that the hot fluid enters the heat exchanger at temperature T1 and its heat capacity is Chot. Also, the cold fluid with the heat capacity of Ccold enters temperature t1; in the meantime, the hot fluid loses its heat, and its temperature drops to T2. It delivers heat to the cold fluid to increase its temperature to t2 and leave the heat exchanger at this temperature.

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Answer:

Umm I'm pretty sure is all of the above

A Carbon atom (C) at the heart of the CO3(2-) Lewis structure is surrounded by three Oxygen atoms (O).

Between each Oxygen atom and the Carbon atom (C), there are two single bonds and one double bond (O). On an oxygen atom with a double bond, there are two lone pairs while on an atom with a single bond, there are three lone pairs (O). A polyatomic ion having the formula CO3 is called a carbonate ion (2-). NCI A carbon oxoanion is carbonate. It is a hydrogencarbonate's conjugate base. Negativity and the nature of bonds This indicates that the oxygen-carbon bond in the CO3(2-) ion is polar in nature, according to the Pauling scale.

The dipole moment along the three bonds in a molecule's trigonal planar form cancels each other out.

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s=vt

s=6m/s×600s

s=3600m

Answer:

To be 100% honest im nkt sure but I'm gonna take a gander. yes i think it is the same

Answer:

Yes heat is the same as thermal energy

Explanation:

Heat is the same thing as thermal because Thermal energy refers to the energy contained within a system that is responsible for its temperature. Heat is the flow of thermal energy. A whole branch of physics, thermodynamics, deals with how heat is transferred between different systems and how work is done in the process (see the 1ˢᵗ law of thermodynamics).

The statement "When a permanent magnet is cut in half, one piece will be a north pole and one piece will be a south pole" is False.

When a permanent magnet is cut in half, it does not result in separating the magnet into distinct north and south poles. Instead, each resulting piece will still have its own north and south poles. This phenomenon is known as magnetic domain alignment. The domains within a magnet are regions where the magnetic moments of atoms align in the same direction, creating a magnetic field. Cutting a magnet disrupts the alignment of these domains, but it doesn't create isolated north and south poles on separate pieces.

Regardless of how a permanent magnet is divided, each resulting piece will have its own north and south poles. The magnetic field lines will still flow from the north pole to the south pole within each piece. Therefore, the statement "When a permanent magnet is cut in half, one piece will be a north pole and one piece will be a south pole" is false.

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The complete question is

which of the following statements concerning permanent magnets is false?- the direction of a magnetic field is indicated by the north pole of a compass-when a permanent is cut in half, one piece will be a north pole and one piece will be a south pole-the north pole of a permanent magnet is attracted to a south pole-magnetic field line outside a permanent magnet originate from the north pole and end on the south pole-all permanent magnets are surrounded by the magnetic field

Answer:

Specific heat capacity, = 1.43 J/g°C

Explanation:

Given the following data;

Mass = 10 g

Change in temperature = 140°C

Quantity of heat = 2000 J

To find the specific heat capacity;

Heat capacity is given by the formula;

\( Q = mcdt\)

Where;

Making c the subject of formula, we have;

\( c = \frac {Q}{mdt} \)

Substituting into the equation, we have;

\( c = \frac {2000}{10*140} \)

\( c = \frac {2000}{1400} \)

Specific heat capacity, = 1.43 J/g°C

\(\sf{\pink{\underline{\underline{\blue{QUESTION:-}}}}}\)

[A] If both assertion and reason are true and reason is the correct explanation of assertion .

[B] If both assertion and reason are true but reason is not the correct explanation of assertion .

[C] If assertion is true but reason is false

[D] If both assertion and reason are false

\(\sf{\pink{\underline{\underline{\blue{SOLUTION:-}}}}}\)

✍️ The force acting on the body of mass M are [its weight] ‘Mg’

Hence,

\(\rm{\green{Acceleration\:of\:the\:body\:(a)\:=\:\dfrac{Mg\:-\:F}{M}\:}}\)

\(\rm{\implies\:Acceleration\:of\:the\:body\:(a)\:=\:g\:-\:\dfrac{F}{M}\:}\)

⚡ Now, M > m therefore, the body with larger mass will have greater acceleration and it will reach the ground first .

\(\green\bigstar\:\rm{\gray{\overbrace{\underbrace{\purple{\therefore\:[D]\:Both\:Assertion\:and\:Reason\:\atop{are\:incorrect\:.}}}}}}\)

(c) T. The period of oscillation remains unchanged even when the mass of the bob is increased to 4.0m.

The period of oscillation of a simple pendulum is primarily determined by its length (l) and the acceleration due to gravity (g). The mass of the bob does not play a significant role in the oscillation period. The formula for the period of a simple pendulum is given by:
T = 2π √(l/g)
In this scenario, the mass of the bob is initially m, and the period is T. When the mass of the bob is replaced by one with mass 4.0m, the formula for the period remains the same since the mass does not influence the period:
T' = 2π √(l/g)
Comparing the initial period (T) and the new period (T'), we can see that both formulas are identical, which means the period remains the same:
T = T'
Hence, the correct answer is (c) T. The period of oscillation remains unchanged even when the mass of the bob is increased to 4.0m.

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Answer: False

The numbers after "W" indicate the beam's nominal depth and weight per foot. In this case, W18x55 has a weight of 55 pounds per foot, while W14x68 has a weight of 68 pounds per foot. Therefore, the W14x68 beam is heavier than the W18x55 beam. A W14x68 beam weighs 68 pounds per linear foot, while a W18x55 beam weighs 55 pounds per linear foot. Therefore, the W18x55 beam is lighter than the W14x68 beam. A W18x55 beam is indeed heavier than a W14x68 beam. Sometimes called a W-beam, a wide flange beam is a type of steel beam shaped like a sideways H. The web can be of equal width or wider than the flange. The size of a W-beam is identified by the first number in the product description followed by the weight per foot. For example, a W21x44 beam measures about 21 inches in width and 44 pounds per foot. The web bears shear forces while the flange resists bending forces.

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Answer:

The work done by the engine is 50 J.

Explanation:

Given;

amount of heat energy added to the heat engine, Q = 75 J

energy lost in the process, E = 50 J

let the work done by the engine (system) = W

Apply the first law of thermodynamic;

ΔU = Q - W

where;

ΔU is change in internal energy = 75 J - 50 J = 25 J

25 = 75 - W

25 - 75 = - W

-50 J = - W

W = 50 J

Therefore, the work done by the engine is 50 J.

Answer:

94 N-m

Explanation:

Joe is standing on the pedal of a bicycle. If his mass of 65 kg, the pedal makes an angle of 55º above the horizontal, and the pedal is 18 cm from the center of the chain ring. The amount of torque Joe exert is 94 N-m.

The force that can cause an object to rotate along an axis is measured as torque. Similar to how force accelerates an item in linear kinematics, torque accelerates an object in an angular direction. A vector quantity is a torque.

Torque is defined as Γ = r×F = r.F.sin(θ). In other words, torque is the cross product of the force vector, where 'θ' is the angle between r and F, and the distance vector (the distance between the pivot point and the place where force is applied).

Given in question mass 65 Kg so force, F = mg = 637 N

Distance r = .18 m and  θ = 55 so sinθ = .82

Torque = rFsin(θ) putting the values, we get

Torque = 94 N-m.

The amount of torque Joe exert is 94 N-m.

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The correct order of increasing impedance is:

C. PZT, gel, skin, matching layer

Impedance is a measure of the opposition to the flow of sound waves in a medium. It depends on the density and speed of sound in the material. In the given options, the order of increasing impedance can be determined by considering the properties of the materials involved.

PZT (lead zirconate titanate) has a higher impedance than gel, skin, and the matching layer. PZT is a piezoelectric material commonly used in ultrasound transducers and has a higher density and speed of sound, leading to higher impedance.

Gel has a lower impedance compared to PZT but higher impedance than skin and the matching layer. Gel is used as a coupling medium between the transducer and the skin to enhance acoustic coupling and minimize impedance mismatch.

Skin has a lower impedance than both gel and the matching layer. It is the outermost layer and acts as an interface between the transducer and the biological tissue.

The matching layer has the lowest impedance among the given options. It is designed to match the impedance of the PZT to the impedance of the tissue being imaged, facilitating efficient sound transmission.

Therefore, the correct order is C.

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Answer:

It increases in depth, indicates the heat flowing from earths warm interior to its surface

The X component was 13.4m and the Y component was 19.9m.

define magnitude ?

A crucial question in science is undoubtedly what is magnitude in physics. Magnitude is a term used to describe size or distance. We can connect the amount of the movement to the size and movement speed of the item.

The magnitude of a thing or a quantity is its size. A automobile moves at a quicker pace than a motorcycle, just like in terms of speed. In this situation, the car's speed is greater than the motorbike's. Let's now talk about what magnitude means in physics.

y=m sin(∅)

x=m cos(∅)

y=2+sin(56)=19.89

=19.89 ≈ 19.9m

x=2+cos(56)=13.42

=13.42≈13.4m

The X component was 13.4m and the Y component was 19.9m.

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Answer:

Sample Response: The first part of the graph is a straight diagonal line and the second part of the graph is a straight horizontal line. The slope of the first part of the graph is positive, indicating that the cart increased in speed, and was therefore accelerating for the first four seconds. After the fourth second, the slope of the line is zero, indicating that the cart moved at a constant speed and did not accelerate any more because the fan was turned off.

Explanation:

we can see that the radial part of the Helmholtz equation is given by dR(p) (3) 2 d² R(p) dp² + p + (k²p² m²)) R(p) = 0 dp.

Helmholtz equation V2u(r) + k²u(r) = 0 in polar coordinates (p,0)

(a) We are required to show that the radial part of Helmholtz equation is dR(p)(3) 2 d² R(p) dp² + p + (k²p² m²)) R(p) = 0 dp

Firstly, we assume that u(p,0) = R(p)Q(0)

Then u(p,0) = R(p)

Also, since ∇2u=1/r^2d/dr(r^2du/dr) , the Helmholtz equation can be written as:

1/r^2d/dr(r^2du/dr) + (k^2)u = 0.

Now, we substitute u(p,θ) = R(p)Q(θ)and u(p,θ) = R(p)Q(θ) in Helmholtz equation, then we get:

R(p)Q(θ) + k^2 R(p)Q(θ) = 0.

Now, we divide by R(p)Q(θ) to get:

[1/R(p) * d/dr(r^2dR/dr) + (k^2 - m^2)/r^2] + 1/Q(θ) * (d²Q/dθ²) = 0.

We can see that the equation is a sum of two terms that depend on different variables. Hence, we set each term equal to a constant to obtain two separate differential equations.

Thus, we get:

1/R(p) * d/dr(r^2dR/dr) + (k^2 - m^2)/r^2 = -λ² and

1/Q(θ) * (d²Q/dθ²) = λ².

Substituting λ² = l(l + 1) and rearranging the equation, we get,1/R(p) * d/dr(r^2dR/dr) + (k^2p² - m²)/p² R(p) = l(l + 1) R(p).

Let's denote (k²p² - m²) by p, then the equation becomes:

d²R/dp² + (1/p)dR/dp + (p - l(l + 1))/p² R = 0.

Using the substitutions v(p) = pR(p) and y(p) = pR'(p), we get the equation in the standard form as:

2 d²v/dp² + (1/p) dv/dp + [p - (l + 1/2)²]/p² v = 0.

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The new angle of deflection of the north pole of the compass needle compare to its initial deflection is smaller.

The new angle of deflection north pole becomes smaller

The angle of deflection is the angle formed when an object changes course from its original course of direction or target.

The angle of deflection of a particular particle is directly proportional to its charge to mass ratio as it passed through an electric field.

As the wire is continuously being lowered farther from the compass, the angle of deflection of the north pole continues to become smaller when compared to its initial deflection.

Therefore, the new angle of deflection of the north pole of the compass needle compare to its initial deflection is smaller.

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