what is the velocity of the object at 5 s ? what is the velocity of the object at 5 ? 0.53 m/s 0.77 m/s 3.3 m/s 4.3 m/s 28 m/s

Option c. It is increased by 2.

Heat generation that is thermal capacity of an object is dependent on mass. So if the mass of an object increases, the heat generation also increases.

How thermal capacity is related to mass?

Thermal capacity= mass × specific heat

As we can see by the formula, that the thermal capacity is directly proportional to mass. So if the mass of the object increases, so does the thermal capacity.

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The answer is C:

It increased by a factor of 2.

Answer:

Inertia is that quantity which depends solely upon mass. The more mass, the more inertia. Momentum is another quantity in Physics which depends on both mass and speed.

Explanation:

The resistance of the 12km length of the railway line is 1.2 × 10⁴ Ω.

The resistivity (electrical resistance of a conductor of unit cross-sectional area and unit length. A characteristic property of each material, resistivity is useful in comparing various materials on the basis of their ability to conduct electric currents)of iron is given as 1.0 × 10⁻⁷. We are supposed to find the resistance of a 12km length of a railway line with a cross-sectional area of 200 cm². Resistance is given by the formula :

R = ρ × l/A

Where R is the resistance of the conductorρ is the resistivity of the material is the length of the conductors A is the cross-sectional area of the conductor We are given ρ = 1.0 × 10⁻⁷, l = 12 km = 12 × 10³ m = 12000 mA = 200 cm² = 200 × 10⁻⁴ m²= 0.02 m²Putting these values in the formula we get :R = (1.0 × 10⁻⁷) × (12000)/ (0.02)R = (1.2 × 10⁴) Ω

Therefore, the resistance of the 12km length of the railway line is 1.2 × 10⁴ Ω.

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The source of protons that are pumped out of the mitochondrial matrix in Stage 1 of oxidative phosphorylation is NADH (A).

During Stage 1, electrons from NADH are passed through the electron transport chain (ETC) and this process results in the pumping of protons across the inner mitochondrial membrane from the matrix to the intermembrane space. This proton gradient is then used by ATP synthase to generate ATP during Stage 2 of oxidative phosphorylation.

FADH can also donate electrons to the ETC, but it does not contribute as many protons to the gradient as NADH. H₂O and H₂S are not involved in the electron transport chain or the proton pumping process during oxidative phosphorylation. Understanding the role of NADH and FADH in the electron transport chain is crucial to understanding how cells generate ATP, the primary energy currency of the cell. Hence, the correct answer is Option A.

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Answer:

the answer is letter b i think

Pls change it if you think my answer is not right ^^

The number of motor units that are recruited within a muscle is the most direct indicator of how much tension can build.

The fundamental functional components of skeletal muscle are known as motor units, which are defined as a motoneuron and all of its related muscle fibers.

Their function in motor control has been extensively researched. Their activity is the central nervous system's end product.

In summary, motor unit recruitment is the process through which the body activates new motor units to produce stronger muscle contractions and more force.

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Fundamental parts of a typical diagnostic X-ray tube include an anode, cathode, and vacuum glass envelope. The correct option is (B) I and II only.

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Answer:

x = 1/2

Explanation:

5x/x + 2 = 3x/x + 1

do cross multiplication

(x + 2) * 3x = (x + 1) * 5x

3x^2 + 6x = 5x^2 + 5x

6x - 5x = 5x^2 - 3x^2

x = 2x^2

x/x^2 = 2

1/x = 2

1 = 2x

1/2 = x

When the gap width is greater than the wavelength, the wave passes across the gap and does not expand out significantly on the opposite side (bottom movie).

Two crucial aspects of a wave cycle are frequency and wavelength. Moreover, the term "wavelength" refers to the separation of any two corresponding locations on adjacent waves. The quantity of waves that travel through a certain spot in a given amount of time is also known as frequency.

The frequency is the number of crests that hit the beach each second, whereas the wavelength is the distance between successive crests. The only difference is that instead of talking about water, we do so while discussing light, which is precisely the same.

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If the shorter beam is rotated so it is aligned horizontally at the original location of its upper end, the location of the center of mass moves downwards.

This is because the center of mass of an object is determined by the distribution of mass in the object. When the shorter beam is rotated so it is aligned horizontally at the original location of its upper end, the mass of the beam is distributed differently, causing the center of mass to shift downwards. This can be visualized by imagining the shorter beam as a weight on a string. When the string is held vertically, the weight is at the bottom and the center of mass is at the center of the weight. However, when the string is held horizontally, the weight is at one end and the center of mass shifts towards that end, causing it to move downwards.

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i hate this question.

Conservation of momentum - is when the total momentum before and after collision is equal.

Here is the formula darling,

p = p

mv = mv

See the pic for example. HmpH

Answer:

average speed = 0.5 m/s

Explanation:

average speed = (distance) / (elapsed time)

Given time elapsed = 30 seconds and distance = 15 meters

average speed = 15 meters / 30 seconds = 0.5 meters/second = 0.5 m/s

Answer:

a) Strings of guitar (being played)

b) Heart-beat in a healthy person

c) Motion of an apple falling from a tree

Explanation:

a) The motion of the string of a guitar being played is the only motion involving simple harmonic motion.

b) All the other motions are circular motion except the heart beat in a healthy person, which is periodic.

c) The motion of an apply falling from a tree is the only motion under the complete influence of gravity from the onset till the end.

The water pressure at a depth of 145 m behind the Hoover Dam in Nevada is 13,940,010 N/m²

To find the water pressure at a depth of 145 m behind the Hoover Dam in Nevada, we will use the water pressure formula, which includes the terms "water pressure" and "density".

The water pressure formula is: P = ρgh

Where:
P = water pressure (in N/m²)
ρ = density of water (in N/m³)
g = acceleration due to gravity (9.81 m/s²)
h = depth of water (in meters)

Given the weight density of water is 9800 N/m³, and the depth (h) is 145 m:

Step 1: Plug in the given values into the formula:
P = (9800 N/m³)(9.81 m/s²)(145 m)

Step 2: Multiply the values:
P = 9800 x 9.81 x 145

Step 3: Calculate the final result:
P = 13,940,010 N/m²

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Answer:

B

Explanation:

I took the test uwu

Answer:

B. The same number of dots would appear in the diagram for carbon.

Explanation:

took the test and got 100%  

proton are the subatomic particles that are _positive_ charged and found in the centre of the atom. neutron are the subatomic particles that are _neutral_ charged and found in the centre of the atom .

Homogeneous Mixture: Its components are not visible, It may be mistaken for a pure substance.

Heterogeneous Mixture: Its components are visible, It can be separated using distillation and Concrete is an example of this kind of mixture

A homogeneous mixture is a combination of substances where the components are evenly distributed and not visibly distinct. The particles are uniformly mixed on a microscopic level, creating a consistent composition throughout the mixture. This type of mixture may appear as a single substance and can be difficult to differentiate from a pure substance without further analysis.

On the other hand, a heterogeneous mixture is characterized by its visible components. The different substances or phases within the mixture are not uniformly distributed, and the composition can vary in different regions. Heterogeneous mixtures can be separated using methods like distillation, which take advantage of the varying properties of the components.

Concrete, which contains aggregates such as sand, gravel, and cement, is an example of a heterogeneous mixture. Its components are easily identifiable, and the varying distribution of materials gives concrete its characteristic appearance and properties.

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An electron and a proton are two particles that are initially at rest in a uniform electric field of magnitude 564 n/c. After 51.6 ns, the particles are free to travel and reach speeds of 2.33 x 106 m/s (in m/s).

The speed of the particles can be determined using the equation:

= v

= E x t x q / m

Where v is the particle's speed, E is the electric field, t is the passage of time, q is the particle's charge, and m is the particle's mass.

For the electron:

= v

= 564 N/C x 51.6 x 10^-9 s x -1.6 x 10^-19 C / 9.11 x 10^-31 kg

= -1.24 x 10^6 m/s

For the proton:

= v

= 564 N/C x 51.6 x 10^-9 s x 1.6 x 10^-19 C / 1.67 x 10^-27 kg

= 2.33 x 10^6 m/s

Note that the electron has a negative charge, so it will experience a force in the opposite direction of the electric field, causing its speed to be negative. The proton has a positive charge, so it will experience a force in the same direction as the electric field, causing its speed to be positive.

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The current flowing in each circuit arrangement depends on the total resistance of the circuit.

To calculate the total resistance of each circuit, we can use the formula:

Total Resistance = R1 + R2 + R3

a. To create a current of 1 ampere, we can use the following circuit:

  (check image 1)

b.  To create a current of 2 amperes, we can use the following circuit:

(check image 2)

The total resistance of this circuit is:

1 ohm + 2 ohm + 1 ohm = 4 ohms

Using Ohm's Law, we can calculate the voltage required to create a current of 2 amperes:

V = IR

V = 2A x 4 ohm = 8V

Therefore, we need to connect three batteries in series to create a voltage of 4.5V, and another three batteries in series to create a voltage of 4.5V, and connect both sets of batteries in parallel to create a voltage of 9V.

c. To create a current of 3 amperes, we can use the following circuit:

(check image 3)

The total resistance of this circuit is:

1 ohm + 1 ohm + 1 ohm = 3 ohms

Using Ohm's Law, we can calculate the voltage required to create a current of 3 amperes:

V = IR

V = 3A x 3 ohm = 9V

Therefore, we need to connect all four batteries in series to create a voltage of 6V, and then connect two sets of these batteries in parallel to create a voltage of 12V.

d. To create a current of 6 amperes, we cannot use these components as they will create a circuit with a total resistance of less than 0.25 ohms, which will exceed the maximum current that can flow through the components and may damage them. In order to create a circuit with a higher resistance that can handle a current of 6 amperes, we would need to add additional resistors in series with the bulbs.

For example, we could add a 1 ohm resistor in series with the 3 ohm bulb to create a circuit with a total resistance of 7 ohms:

(check image 4)

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Therefore, option c) is the correct statement since the image produced by a convex mirror is always smaller than the object and hence larger than one produced by a plane mirror in its place.

A convex mirror is a spherical mirror with its reflective surface bulging outward, away from the incident light. It is also called a diverging mirror since it diverges the incoming light rays.

The image formed by a convex mirror is always virtual, meaning that it cannot be projected on a screen. It is formed by the apparent intersection of the reflected light rays, and it appears to be behind the mirror. Since the light rays are diverged by the convex mirror, the image produced is always smaller than the actual object. Hence, option e) is false.

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Answer:

Thin, aluminium and buried underground.

Explanation:

When it comes to electrification of a state or province, some characteristics of the wire to use must be considered. This would help to minimize and avoid power loss and wire burns.

i. The wire to use should be thin, and a quite number can be twisted one against the other so as to increase the surface area for heat dissipation.

ii. Aluminium wire is more preferable for this project. It has a high melting point, and reduces energy loss.

iii. Burying the wire underground through an insulator is the best choice, though expensive but would preserve the wire from external influence.

The correct working of this question with the given information is as follows:

mass of water taken = 9.990 gram ,

density of water taken = 0.9978 gram/ml

The formula to find out the volume of the water measured out is as follows:

  volume in ml = mass in gram/density in gram per ml

We can now substitute values in this given formula to find volume of water taken in ml, which is

volume of water taken in ml = 9.990/0.9978 = 10.012 ml

Therefore the correct option to this question is option d. The actual volume of water measured is 10.012 ml

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Gravitational field near the surface of Mercury is approximately 3.7 N/kg

Gravitational field near the surface of Venus is approximately 8.87 N/kg.

Gravitational field near the surface of Mercury and Venus, we can use the formula:

gravitational field (g) = (G * M) / R^2

where G is the gravitational constant (6.67430 × 10^(-11) m^3 kg^(-1) s^(-2)), M is the mass of the planet, and R is the radius of the planet.

For Mercury:
M = 3.29E23 kg
R = 2.44E6 m

g = (6.67430 × 10^(-11) m^3 kg^(-1) s^(-2) * 3.29E23 kg) / (2.44E6 m)^2
g ≈ 3.7 N/kg

For Venus:
M = 4.87E24 kg
R = 6.05E6 m

g = (6.67430 × 10^(-11) m^3 kg^(-1) s^(-2) * 4.87E24 kg) / (6.05E6 m)^2
g ≈ 8.87 N/kg

So, the gravitational field near the surface of Mercury is approximately 3.7 N/kg, and the gravitational field near the surface of Venus is approximately 8.87 N/kg.

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Answer:

The surface tension formula is (length force acts y=f/d. F is the force which applies to the liquid

Answer:

Explanation:

To add or subtract two vectors, add or subtract the corresponding components. Let →u=⟨u1,u2⟩ and →v=⟨v1,v2⟩ be two vectors. The sum of two or more vectors is called the resultant. The resultant of two vectors can be found using either the parallelogram method or the triangle method .

The frequency received by a person watching an oncoming ambulance moving at 75 km/h and emitting a steady 440 Hz sound from its siren would be different due to the Doppler effect.

The Doppler effect occurs when there is relative motion between a source of sound and an observer. In this case, the ambulance is moving towards the person. As the ambulance approaches, the sound waves from the siren get compressed, resulting in an increase in frequency. Conversely, as the ambulance moves away, the sound waves get stretched, resulting in a decrease in frequency. The formula to calculate the observed frequency is given by:

Observed frequency = Actual frequency * (Speed of sound + Speed of observer) / (Speed of sound - Speed of source)

In this case, the actual frequency is 440 Hz and the speed of the ambulance is given as 75 km/h. We need to convert the speed to m/s by dividing it by 3.6. Assuming the speed of sound is 343 m/s, we can use the formula to calculate the observed frequency.

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Velocity, acceleration, force, and displacement, have magnitude and direction (ie vector quantity) in common

This is a which have both magnitude and direction. Example include:

This is a quantity which has magnitude but no direction. Example include:

From the above, we can see that velocity, acceleration, force, and displacement, have magnitude and direction (ie vector quantity) in common

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