An object with a height of \( 34 \mathrm{~cm} \) is placed \( 3.0 \mathrm{~m} \) in teom of a Part A convex minor with a focal length of \( 0.65 \mathrm{~m} \). Find the focesion of the image produced

Answer:

5.29 m/s²

Explanation:

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

Initial velocity (u) = 5.0 m/s

Final velocity (v) = 8.7 m/s

Time (t) = 0.70 s

Acceleration (a) =?

Acceleration is simply defined as the rate of change of velocity with time. Mathematically, it is expressed as:

a = (v – u) /t

Where:

a is the acceleration.

v is the final velocity.

u is the initial velocity.

t is the time.

Thus, with the above formula, we can obtain the acceleration of the dolphin as illustrated below:

Initial velocity (u) = 5.0 m/s

Final velocity (v) = 8.7 m/s

Time (t) = 0.70 s

Acceleration (a) =?

a = (v – u) /t

a = (8.7 – 5)/0.7

a = 3.7 / 0.7

a = 5.29 m/s²

Therefore, the dolphin's acceleration is 5.29 m/s².

(a) The absolute pressure at an ocean depth of 850 m can be calculated by adding the pressure due to the water column to the atmospheric pressure.

(b) To counterbalance the force exerted by the water at this depth on a circular submarine porthole, the frame must exert a force equal in magnitude and opposite in direction.

(a) The absolute pressure at a given depth in a fluid is the sum of the pressure due to the weight of the fluid above and the atmospheric pressure. In this case, the pressure due to the water column is determined by the density of seawater and the depth. Using the formula P = ρgh, where P is pressure, ρ is density, g is the acceleration due to gravity, and h is the depth, we can calculate the pressure due to the water column. Adding this to the atmospheric pressure of 101.3 kPa gives us the absolute pressure at the given depth of 850 m.

(b) The force exerted by the water on the submarine porthole is equal to the pressure at that depth multiplied by the area of the porthole. Using the formula F = PA, where F is force, P is pressure, and A is area, we can calculate the force exerted by the water on the porthole. To counterbalance this force, the frame around the porthole must exert an equal and opposite force.

By calculating the absolute pressure at the given ocean depth and determining the force exerted by the water on the porthole, we can understand the pressure conditions and the force requirements for the porthole frame.

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Explanation:

Note that resonance can only occur when the natural frequency is greater than the damping rate, multiplied by the square root of 2. If the damping is too large, then resonance cannot occur.

The forces that act on the block that is at rest on the slope are:

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

A force that holds an object at rest is called static friction. The definition of static friction is: The resistance people feel when they attempt to move a stationary object across a surface without actually causing any relative motion between their body and the surface they are moving the object across.

A contact force is a normal force. A normal force cannot be applied to two surfaces that are not in contact.

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question

A block is resting on an slope. (Figure 3) Which of the following forces act on the block?

Check all that apply.

weight

static friction

normal force

kinetic friction

By Newton's second law, the apparent weight of rider coming at rest is 3548 N.

According to formula, v = u + at

a = 39.2 m/\(s^{2}\)

Force, F = ma

F = m(a+g)

F = apparent weight

m = mass, given = 65 kg

a = acceleration, given = 39.2 m/\(s^{2}\)

g = 9.8 m/\(s^{2}\)

Put these values in formula, F = m(a+g)

F = 65(39.2+9.8)

F = 3548 N

Therefore, the apparent weight of rider coming at rest is 3548 N.

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Answer:

9.8 meters per square second

Explanation:

Free Falling Object. the value of g is 9.8 meters per square second on the surface of the earth. The gravitational acceleration g decreases with the square of the distance from the center of the earth. But for many practical problems, we can assume this factor to be a constant.

Relation between work done and potential is a change in the potential energy associated with the force. The negative sign provides the convention that work done against a force field increases potential energy, while work done by the force field decreases potential energy.

The acceleration of the car during the 10th to 17th second interval is calculated using the equation a=(v2-v1)/t, where a is the acceleration, v1 is the initial velocity, v2 is the final velocity, and t is the time interval.the acceleration of the car during this interval is  6.14km/h2/s.the instantaneous acceleration is  6.14km/h2/s.

In this case, v1=29km/h, v2=47km/h, and t=7 seconds. Thus, the acceleration of the car during this interval is a = (47-29)/7 = 6.14km/h2/s.

The instantaneous acceleration of the car at both the initial and final velocities can be calculated using the equation a=dv/dt, where a is the acceleration, dv is the change in velocity, and dt is the change in time.

For the initial velocity of 29km/h, the instantaneous acceleration is a = dv/dt = 0km/h/s. For the final velocity of 47km/h, the instantaneous acceleration is a = dv/dt = 6.14km/h2/s.

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The expected ionic charges for the representative elements are: O -2, Li +1, Be +2, Cl -1, K +1, Ne 0, P +3, Al +3. The expected number of covalent bonds for the representative elements are: Br 1, S 2, Kr 0, Ne 0, Ge 4.

The ionic charge of an element depends on the number of electrons it gains or loses to achieve a full valence shell.

Elements in group 1 of the periodic table (Li, K) have a tendency to lose one electron to form a +1 ion, while elements in group 2 (Be) tend to lose two electrons to form a +2 ion. Elements in group 17 (Cl) tend to gain one electron to form a -1 ion, while elements in group 16 (O, S) tend to gain two electrons to form -2 ions.

Noble gases such as neon (Ne) and krypton (Kr) have a complete valence shell and therefore do not typically form ions.

However, certain conditions such as extreme temperatures or pressures can cause them to form ions. Phosphorus (P) and aluminum (Al) can both lose three electrons to form ions with a +3 charge.

The number of covalent bonds an element can form depends on the number of valence electrons it has available to share with other atoms.

Bromine (Br) can form one covalent bond, sulfur (S) can form two, and germanium (Ge) can form four. Noble gases such as neon and krypton typically do not form covalent bonds since they have a complete valence shell and are therefore unreactive.

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Answer:

ATP

During cellular respiration, a glucose molecule is gradually broken down into carbon dioxide and water. Along the way, some ATP is produced directly in the reactions that transform glucose. Much more ATP, however, is produced later in a process called oxidative phosphorylation.

Explanation:

have a nice day.

The term for the mixing of outside air into a cloud or a rising parcel of air is entrainment.

option B.

Entrainment can be defined as the process by which surrounding air is drawn into a cloud or a rising parcel of air, leading to the mixing of air masses and affecting the cloud's characteristics and properties.

So let's define other terms given in the options;

Subsidence refers to the downward motion of air in the atmosphere.

Adiabatic mixing refers to the process in which air parcels with different temperatures and moisture content mix without exchanging heat with their surroundings.

A sounding, on the other hand, refers to a vertical profile of temperature, humidity, and other atmospheric properties obtained from instruments such as weather balloons.

Thus, the correct answer is Entrainment.

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The magnetic field a distance r away from a long current-carrying wire can be calculated using the Biot-Savart Law and Ampere's Law.

To calculate the magnetic field using the Biot-Savart Law, we need to consider a small element of the wire and calculate the magnetic field contribution from that element. The Biot-Savart Law states that the magnetic field dB at a point due to a small current element dI is directly proportional to the magnitude of the current, the length of the current element, the sine of the angle between the current element and the line connecting the point and the element, and inversely proportional to the square of the distance between the point and the element.

Integrating the contributions from all the small current elements along the wire, we can determine the total magnetic field B at a distance r away from the wire. The integral form of the Biot-Savart Law is often used for this calculation.

On the other hand, Ampere's Law relates the magnetic field around a closed loop to the total current passing through the loop. For a long, straight wire, we can imagine a circular loop centered on the wire and use Ampere's Law to calculate the magnetic field on that loop. Ampere's Law states that the line integral of the magnetic field around a closed loop is equal to the product of the permeability of free space and the total current passing through the loop.

By applying Ampere's Law to a circular loop of radius r centered on the wire, we can determine the magnetic field at that distance.

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the work done to raise a 25kg book to a 1.5 m shelf is 367.5J and the potential energy of the book will be 367.5

Work done by a force is equal to the scalar product of the force applied and displacement. If d displacement happens on applying a force F, then work done, W by the force is

W = F. d

given:

mass, m = 25 kg

height, d = 1.50 m

work has to be done against the weight of the book, F = mg

work done W = F. d

W = mgd

W = (25) ×(9.8)×(1.50)

W = 367.5 J

This work is stored as the potential energy of the book.

Therefore, the work done to raise a 25kg book to a 1.5 m shelf is 367.5J and the potential energy of the book will be 367.5J

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Answer:

The first step is to calculate the potential energy of the ball at the top of the first hill using the formula PE = mgh, where m is the mass of the ball, g is the acceleration due to gravity, and h is the height of the hill. PE = (8 kg) x (9.8 m/s^2) x (20 m) = 1568 J Next, we can use the law of conservation of energy, which states that the total energy of a closed system remains constant. This means that the potential energy at the top of the first hill must be equal to the kinetic energy at the bottom of the hill, since there is no external work done on the ball. So, using the formula KE = 1/2mv^2, where v is the velocity of the ball, we can solve for v: KE = 1

Answer: Friction that acts on a sliding object

Explanation:

5.4 * 10^(-5) m

If the beam of electrons goes undetected, the force on the electron due to the electric force must be the

same magnitude as the force on the electron due to the magnetic force. Therefore, qE = qvB, and solving

for v  that

v =E/B

v = 7900 V/m/(9.1* 10^?3) T

= 86831 m/s.

If the electric ?eld is turned o?, the magnetic force will cause the electron to undergo uniform circular

motion, so qvB = mv2/r. Solving for r we ?nd that

r =mv/qB

=> r = (9.11 * 10^(-31) *86831 )/(1.6*10^(-19) * 9.1*10^(-3)) = 5.4 * 10^(-5) m

What is Force?

The original form of Newton's alternate law states that the net force acting upon an object is equal to the rate at which its instigation changes withtime.However, this law implies that the acceleration of an object is directly commensurable to the net force acting on the object, is in the direction of the net force, If the mass of the object is constant.

generalities related to force include thrust, which increases the haste of an object; drag, which decreases the haste of an object; and necklace, which produces changes in rotational speed of an object. In an extended body, each part generally applies forces on the conterminous corridor; the distribution of similar forces through the body is the internal mechanical stress. similar internal mechanical stresses beget no acceleration of that body as the forces balance one another. Pressure, the distribution of numerous small forces applied over an area of a body, is a simple type of stress that if unstable can beget the body to accelerate. Stress generally causes distortion of solid accoutrements , or flow in fluids.

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There is no surface of the material that is least likely to reflect light even on a rough surface.

Light is electromagnetic radiation, at both visible and invisible wavelengths. Light exists when there is a light source produced by the object itself or as a result of reflected light.

Reflection of light is the process of reappearing light from the reflecting plane, a process that occurs from a change in the direction of propagation of light to the side of the media of origin.

The nature of the reflection of light is strongly influenced by the shape of the surface of the object that reflects the light. If the surface of the object is flat, then the reflected light can reflect perfectly like in a mirror. It is a specular reflection.

If the light fall on an uneven surface, the shape of the reflection can point in various directions so that it becomes irregular, such as in a cracked mirror, tree, or wall. It is called diffusion reflection.

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The lowest frequency infrared waves are those listed below. The wavelength range of infrared (IR) is between 780 nm to 1 mm, while its frequency range is between 300 GHz and 400 THz.

The correct answer is D

An element of the electromagnetic spectrum is infrared waves or infrared light. The human eye cannot perceive infrared waves, but people can feel their heat. Infrared waves are everywhere around us. To change the channel on your TV, a remote control sends out infrared light waves, which are just beyond the visible light range.

Irradiation (IR) is electromagnetic radiation, a type of wave-moving energy. The heat it emits is identical to what we experience from the Sun and is entirely natural. Far-infrared waves are being projected into the area by our radiators, and as they hit people and objects in the environment, they will be reflected back and heat them up.

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The head-to-tail method consists of changing the subtraction of vectors into an addition, where the second vector in the addition will be the opposite vector of the second vector in the subraction:

If vector b is <1, 4>, vector -b is <-1, -4> (we just need to change every signal).

Now, let's draw vector 'a', and in the head of vector 'a' let's start drawing the tail of vector b:

The red vector, which is the sum of 'a' and '-b', is created at the tail of 'a' and finishes at the head of '-b'.

The initial point is (0, 0), and the terminal point is (-4, -9)

(a) The spacing Y of the maxima of the screen for light is  5 x 10^-7 m. (b) Yes, we would expect to observe the interference of light. (c) The slits should be placed a distance of 500 nm apart to observe the maxima separated by 1 mm.

(a) The spacing Y of the maxima on the screen can be calculated using the formula for the interference of light from two slits:

=> Y

= L x λ / d

here L is distance from the slits to the screen,

λ is wavelength of the light,

d is distance between the slits.

Putting the values, we have:

=> Y

= 1 m x 500 nm / 1 cm

= 500 nm/cm

= 5 x 10^-7 m

(b) Yes, we would expect to observe the interference of light on the screen for this situation. This is because when light passes through two narrow slits, it creates an interference pattern on the screen that is a result of the constructive and destructive interference of the light waves. This pattern is characterized by bright and dark bands, with the bright bands representing areas of constructive interference and the dark bands representing areas of destructive interference.

(c) To calculate the distance the slits should be placed to observe the maxima separated by 1 mm, we need to rearrange the formula for Y and solve for d:

=> d

= L x λ / Y

= 1 m x 500 nm / 1 mm

= 500 x 10^-9 m

So, the slits should be placed a distance of 500 nm apart to observe the maxima separated by 1 mm.

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Seismic movement, Volcanic Activity, Plate Tension

Answer:

501.1 kg

Explanation:

Weight possible to carry :

If current doubles, charge flow doubles. Ohm's law states that current (I) is proportional to charge (Q) over time. When current doubles, charge also doubles.

2. If current doubles, time halves for same charge flow.

3. If the current in a circuit is switched on for twice as long, the total charge that flows through the circuit doubles.

The principle behind this is Ohm's law, wherein the current (I) that runs through a circuit is proportionate to the amount of charge (Q) that passes through the circuit in a given period. As the present is multiplied by two, correspondingly the quantity of charge also increases by two.

If the electric current is increased by two times its original value, the duration required for the identical quantity of charge to pass through is reduced by half. The reason for this is that the equation Q = I * t reflects the correlation among charge (Q), current (I), and time (t).

If the duration of the current in a circuit is doubled, then the amount of charge that passes through the circuit also doubles. The reason behind this is that the correlation linking charge (Q), current (I), and time (t) is defined by the formula Q = I * t.

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Answer:

The magnitude of the force is 12 N Upwards

Explanation:

The force on a positive charge will be in the same direction as the field, but the force on a negative charge will be in the opposite direction to the field. Thus the direction of the force is upward.

Given;

magnitude of charge, q = 0.06 C

magnitude of electric field, E = 200 N/C

The magnitude of the force is given by;

F = qE

F = 0.06 x 200 N/C

F = 12 N Upwards

Therefore, the magnitude of the force is 12 N Upwards

Answer:

A. 12N up

Explanation:

According to the dude above me

Answer:

"shocking" results...

Explanation:

Answer:

mass 3.67 kg, density 600 kg/m3) is fitted

with lead (density 1.14 * 10^4 kg/m3) so that it floats in water with

0.900 of its volume submerged. Find the lead mass if the lead is fitted

to the block’s (a) top and (b) bottom.

The resistance that should be connected in parallel with the series combination of two resistors in Hari's circuit to get the same current drawn by Prasad's circuit is 220 ohms.

Resistors are the electric component that regulates the flow of current through the conductors or circuits.

Here,
Resistor 1:
red = 2, red = 2, orange = 3,
Resistance = 2 * 10² + 3 * 10⁰ = 220 ohms

Resistor 2:
red = 2, brown = 1, yellow = 4,
resistance = 2 * 10² + 1 * 10 ⁰= 220 ohms

Since the two resistors are connected in series, the total resistance of the series circuit is 220 + 220 = 440 ohms. The value of the equivalent resistance in the parallel circuit made by Prasad can be calculated using the formula:

1/R = 1/R₁ + 1/R₂

Substitute the values of resistance,

1/R = 1/220 + 1/220

R = 220 × 220 / (220 + 220) = 220 ohms

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The resultant of the two given vectors is 346.4 units.

The resultant of the three vectors is the sum of all the three vectors acting together. The resultant vector is the single vector that will represent all the three vectors in terms of magnitude and direction.

The sum of the vectors in x-direction;

Vx = V cosθ

where;

for 200 units, θ = 0⁰ (above the horizontal)

for 400 units, θ = 60⁰ (above the horizontal)

Vx = 200 cos(0) - 400 cos(60)

Vx = 0

The sum of the vectors in y-direction;

Vy = 200 sin(0) + 400 sin(60)

Vy = 346.4 units

The resultant vector is calculated as;

V = √(Vx² + Vy²)

V = √(0² + 346.4²)

V = 346.4 units

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Answer:

the rock will probably sink in water because density of rock heavier than the density of water.

Density of water=1g/cm

density of rock=1.73g/cm

1g/cm< 1.73g/cm