A cannonball with a mass of 50 kilograms and a golf ball with a mass of 0. 8 kilograms are dropped in a vacuum from a height of 10 meters. Compare the acceleration of each object as they fall.

The given statement is True.

One useful way to model magnetic field strength is through the concept of magnetic flux. Magnetic flux is a measure of the number of magnetic field lines passing through a given area.

It is defined as the product of the magnetic field strength, the area, and the cosine of the angle between the magnetic field and the area vector. Mathematically, it can be expressed as:

Φ = B * A * cos(θ)

where Φ is the magnetic flux, B is the magnetic field strength, A is the area, and θ is the angle between the magnetic field and the area vector.

Magnetic flux is an important concept in electromagnetism and is used in many applications, including magnetic sensors, electric motors, and generators.

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Answer: Frost

Explanation: Frost is the deposition of ice, that develops after the freezing of the water vapor. It most commonly appears on the surfaces of the ground and can be observed as fragile crystals of ice. These can be observed on the window panes, blades of the grass, or any other solid exposed surface. The window frost develops when a pane of glass is exposed to below freezing temperature from the outer surrounding and the moist air from inside.

Answer: It is frost.

Explanation: I took the test on edge 2022.

When the piston of a pump reaches its lowest point, the volume remaining in the pump is referred to as the residual volume.

Residual volume is the volume of fluid that remains in the pump after the maximum amount of fluid has been displaced. This residual volume can be significant in certain applications, as it can lead to incomplete delivery of fluid or inaccurate measurements.

To minimize residual volume, pump manufacturers may design pumps with low dead space volumes or use specialized mechanisms to ensure complete displacement of fluid.

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a) The motion of the object between 15 s to 30 s is increasing velocity, to a constant velocity and finally a decreasing velocity.

(b) The average velocity of the object between 0 and 15 seconds is 0.167 m/s.

(c) The position of the object at 5.0 seconds is 0.5 m.

(d) Between 30 and 40 seconds, the velocity of the object is decreasing and the object is decelerating.

(a) The motion of the object between 15 s to 30 s can be described as increasing velocity, to a constant velocity and finally a decreasing velocity.

(b) The average velocity of the object between 0 and 15 seconds is calculated as;

average velocity = total displacement / total time

average velocity = (2.5 m - 0 m ) / ( 15 s - 0 s ) = 0.167 m/s

(c) The position of the object at 5.0 seconds is calculated as follows;

at 5.0 seconds, the position of the object is traced from the graph as 0.5 m.

(d) The motion of the object between 30 and 40 seconds is calculated as;

velocity = ( 0 m - 4 m ) / ( 40 s - 30 s ) = - 0.4 m/s

Between 30 and 40 seconds, the velocity of the object is decreasing and the object is decelerating.

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The time of flight of bullet is 0.0685 seconds and the speed when it emerges out of the gun is 775.

As the bullet is fired horizontally from the gun at a distance of 53m away. But the bullet hits the target 2.3cm below the target.

So, the vertical displacement of the bullet is 2.3cm. The accelerations in the vertical direction will be g (acceleration due to gravity).

(a) As we know, in case of gravity, we can use equations of motion,

So, using equation,

S = ut + 1/2gt²

Where, u is the initial velocity of the bullet which is 0m/s in this case,

S is the vertical displacement of the bullet,

g is acceleration due to gravity and,

t is time of flight of the bullet.

Putting all the values,

S = 1/2gt²

2.3/100 = 1/2(9.8)(t²)

0.023 = 4.9t²

t² = 0.00469387

t = √0.0046987

t = 0.0685 seconds.

(b) The velocity as it emerges from the gun is equal to the muzzle velocity of the gun,

So, we can write,

Muzzle velocity V = Horizontal distance covered/time taken.

V = 53/0.0685

V = 773.72 m/s.

One thing that should be noted here is that the initial velocity that we took as zero in part (a) is taken with respect to the vertical motion and nit the Horizontal motion. So, one should not confuse the muzzle velocity in part (b) with the initial velocity mentioned in the part(a)

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Complete question - A rifle is aimed horizontally at a target 53 m away. The bullet hits the target 2.3 cm below the aim point. Find

(a) the bullets time of flight and (b) its speed as it emerges from the rifle?

Since the resistors are in series, the equivalent resistance is the sum of the resistances:

Now, to find the current, let's divide the voltage by the total resistance:

The current through each resistor is the same because they are in series: 1.5 A.

To find the most powerful resistor, let's analyze the formula for the power in a resistor:

We can see that the greater the resistance, the greater the power, therefore the most powerful resistor is the 30 ohms resistor.

The volume that 1L of gas will occupy at 37°C and a constant pressure is 0.8L. Details about volume can be found below.

The volume of a gas can be calculated using the Charles law equation as follows:

V1/T1 = V2/T2

Where;

1/310 = V2/248

248 = 310V2

V2 = 248 ÷ 310

V2 = 0.8L

Therefore, the volume that 1L of gas will occupy at 37°C and a constant pressure is 0.8L.

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Answer:

\(A_{1}\) = 0.2 \(m^{2}\)

Explanation:

The pressure on the pistons is given as;

Pressure = \(\frac{Force}{Area}\)

So that,

Pressure on the small piston = \(\frac{F_{1} }{A_{1} }\) and Pressure on the large piston = \(\frac{F_{2} }{A_{2} }\)

Thus,

\(\frac{F_{1} }{A_{1} }\) = \(\frac{F_{2} }{A_{2} }\)

Given that: \(F_{1}\) = 100 N, \(F_{2}\) = 2000 N, \(A_{2}\) = 4 \(m^{2}\).

\(\frac{100}{A_{1} }\) = \(\frac{2000}{4}\)

\(A_{1}\) = \(\frac{100*4}{2000}\)

    = \(\frac{400}{2000}\)

    = 0.2

\(A_{1}\) = 0.2 \(m^{2}\)

The area of the small piston is 0.2 \(m^{2}\).

The common cause for gas pump fires  is  static electrical discharge.

Static electricity is an imbalance of electric charges within or on the surface of a material or between materials.

In petrol pumps,

During refueling, many petroleum products become electrically charged when they flow through pipes and hoses, including gasoline, kerosene, petrol, diesel etc. which are poor electrical conductors.

Charge remains until it is able to move away by means of an electric current or electrical discharge which causes the static spark that can ignite gasoline vapors, causing a flash fire.

Hence, static electrical discharge is common cause of gas pump fires.

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Answer:

1. A car moving 40 mph has four times as much kinetic energy as one moving 20 mph, while at 60 mph a car carries nine times as much kinetic energy as at 20 mph. Thus a modest increase in speed can cause a large increase in kinetic energy.

PLZ MARK BRAINLIEST THANK AND FIVE STAR:)

Answer:

a car moving 40mph has four times as much kinetic energy as one moving 20 mph, while at 60 mph a car carries nine times as much kinetic energy as at 20 mph.

if you need any more info just dm me

Answer:

Sustainable energy is essential to meet uncontrolled rising demand for energy, reduce pollution and shift to resources that can be used again and again.

Explanation:

Considering the Sustainable Goals floated by United Nation, it is essential for all countries to improve their score in all the SD goals.

One of the SD goal is to shift to sustainable energy.

Sustainable energy is essential from following three points

- Reuse of energy source again and again to outcome the fear of resource depletion

- Sustainable energy source shall ensure cleaner environment

- Sustainable energy sources are also essential to meet the rising consumption of energy with time all across the globe.

Some common examples are - Solar energy, Wind Energy, Energy from nuclear fuels etc.

Answer:

two protons and two neutrons

it's the answer. hope it helps

Alpha particles have two protons and two neutrons. Therefore, option (D) is correct.

Alpha particles can be defined as positively charged particles released from the decay of several radioactive materials. The mass of the Alpha particle is because of the presence of two protons and two neutrons. Therefore, the Alpha particles nucleus is very similar to the nucleus of the Helium atom and are denoted by the Greek alphabet α.

An alpha particle or ray is also known as doubly ionized helium nuclei (He²⁺). The alpha particle's mass is equal to 6.64 × 10⁻²⁷ Kg. Alpha particles are generally generated during the standard radioactive decay of atomic nuclei.

Alpha particles contains the kinetic energy of 5MeV and a speed of 5 % of that of the speed of light. They are also formed in high-energy particle accelerators and are highly ionized particles with low penetration depth compared to other particles.

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The sickle cell allele is still common in tropical regions because it provides protection against malaria, which is prevalent in those areas.

A cell is the basic unit of life and the smallest structure that can perform all the functions necessary for life.

The sickle cell allele is still common in tropical regions because it provides protection against malaria, which is prevalent in those areas. Malaria is caused by a parasite that is transmitted by mosquitoes, and it infects and destroys red blood cells.

Individuals who carry one copy of the sickle cell allele (known as sickle cell trait) are more resistant to malaria than those who do not have the allele. This is because the sickle-shaped red blood cells that result from the sickle cell allele are less hospitable to the malaria parasite than normal red blood cells.

However, individuals who carry two copies of the sickle cell allele (known as sickle cell disease) can experience serious health complications, including pain, anemia, organ damage, and early death.

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All the answers are in the pics I have sent. I hope this will help you. Have a good day!

The turning effect of force used in cycling. Hence, option (c) is correct.

The moment is the term for turning effect of a force. It is the result of multiplying the force by the perpendicular distance from the force's line of action to the pivot point or location where the object will turn.

If a body that is being affected by a net external force is allowed to revolve around a pivot, the body will typically turn in the force's direction.

When a cycle paddled, force is applied for revolving it. That is why, the turning effect of force used in cycling.

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The magnitude of the resultant force (9). 2.5872 x 10⁻⁸N.

The magnitude of the gravitational force between two masses m₁ and m₂ separated by a distance r is given by:

F = G * m₁ * m₂ / r²

where G is the universal gravitational constant.

To find the resultant force on the mass at the origin, we need to calculate the gravitational forces exerted on it by the other two masses and then find the vector sum of those forces.

Let's assume the other two masses are located at points (x₁, y₁) and (x₂, y₂) in the xy plane. Then, the distances between the mass at the origin and the other two masses are:

r₁ = √(x₁² + y₂²)

r₂ = √(x₂² + y₂²)

The gravitational forces exerted on the mass at the origin by the other two masses are:

F₁ = G * 7kg * 7kg / r₁²

F₂ = G * 7kg * 7kg / r₂²

To find the direction of each force, we need to calculate the angles between the line connecting the mass at the origin and each of the other two masses, and the x-axis. The angles are given by:

θ₁ = atan2(y₁, x₁)

θ₂ = atan2(y₂, x₂)

Note that a tan2(y, x) returns the angle between the positive x-axis and the line connecting the origin to the point (x, y), measured counterclockwise from the x-axis.

The x and y components of each force are then given by:

F₁x = F₁ * cos(θ₁)

F₁y = F₁* sin(θ₁)

F₂x = F₂ * cos(θ₂)

F₂y = F₂ * sin(₂)

The resultant force on the mass at the origin is the vector sum of F₁ and F₂:

Fx = F₁x + F₂x

Fy = F₁y + F₂y

The magnitude of the resultant force is given by:

F = (Fx² + Fy²)

Plugging in the given values of G, m, x, and y, and evaluating the above equations, we get:

F = 2.5872 x 10⁻⁸N

Therefore, the answer is option (9).

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It emphasizes how much humans rely on fossil fuels, even though they release carbon dioxide. So, option B.

Fossil fuels are used to generate energy; they are used in houses to generate heat, in large power plants to generate electricity, and in engines to generate power.

80 percent of the world's primary energy demand is currently met by fossil fuels, and the energy system is responsible for about two thirds of all CO2 emissions in the world.

Particularly with regard to indoor air quality in many less developed countries, these are incredibly inefficient and polluting. Sustainable development is hampered by the utilization of renewable biomass in this manner.

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Given:

Mass, m = 3.5 kg

Initial temperature, T1 = 20°C

Final temperature, T2 = Boiling point of water = 100° C

Part (a).

Let's find the amount of energy needed.

Apply the specific heat capacity formula:

Where:

c is the specific heat capacity of water = 4.187 kJ/g °C

Thus, we have:

Where:

1 kJ = 0.239 kCal

1172.36 kJ = 1172.36 x 0.239 = 280.19 kCal

Therefore, the heat needed is 280.19 kCal.

Part B.

Given:

Cost = 13¢ per kWh

Where:

1 kCal = 0.00116 kWh

280.19 x 0.00116 = 0.327 kWh

Since the charge for is 13 ¢ per kWh, we have:

13 x 0.327 = 4.251 ¢.

Therefore, the cost, if electrical energy were used, will be 4.251 ¢

ANSWER:

• (a). 280.19 kCal

• (b)., ,4.251 ¢.

According to  the given statement The force exerted by the string on the object is 2.7 N.

Any item travelling in a circular direction has a tangential velocity, which is its linear speed. On a turntable, a point in the centre moves less distance in a full rotation than a point near the outside edge.

Tangential velocity is determined by dividing the circle's circumference by the time required for one complete rotation: 2*pi*r/t. The formula V = w * r, where w (omega) is the angular velocity of the rotating object and r is the radius of the circle, also relates it to angular velocity.

m = 0.9 kg

r = 3m

v = 3m/s

Force (f) = mv2/r

Now ,putting values

force (f) = \(\frac{0.9 k g \times\left(3 \mathrm{~ms}^{-1}\right)^2}{3 \mathrm{~m}}\)

F = 2.7 N

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The object will decelerate over time, as the net force acting on it decreases. This is because the net force is the vector sum of all forces acting on the object.

When an object is moving to the right in a straight line, and the net force acting on the object is also directed to the right, it means that there is no opposing force to halt its motion.

Therefore, the object will continue to move to the right in a straight line with constant speed since there is no change in the magnitude of the net force.

However, when the net force is directed to the right and is decreasing with time, the object's motion will be altered. The magnitude of the force is decreasing with time, so there will be less force acting on the object.

The force acting on the object is decreasing with time; thus, the object's acceleration will be less than before. As a result, the velocity of the object will decrease with time. Since there is no force opposing the motion, the object will continue to move to the right but with decreasing speed due to the decrease in net force acting on it.

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The time that has passed since the 60Co source was labeled is 34.8 years.

1 mCi = 37 MBq

So, 4.00 mCi = 148 MBq

We are also given that the present activity (A) is 1.3 × 10^7 Bq.

The half-life (t₁/₂) of 60Co is 5.2714 years. To find the decay constant (λ), we can use the formula:

λ = ln(2) / t₁/₂

λ = ln(2) / 5.2714 y

λ = 0.1315 \(y^-1\)

Now we can solve for the time (t) that has passed since the 60Co source was labeled:

A = A₀ * e(-λt)

t = (ln(A₀/A)) / λ

t = (ln(148 × \(10^6\) Bq / 1.3 × \(10^7\) Bq)) / 0.1315 \(y^-1\)

t = 34.8 years

Half-life is the time taken for half of a given sample of a radioactive substance to decay or disintegrate. It is a fundamental concept in nuclear physics and is useful in understanding the properties of radioactive isotopes. Half-life is a measure of the rate at which a substance decays, and it is expressed in units of time, such as seconds, minutes, or years.

The decay process of a radioactive substance is random, which means that it is impossible to predict when a particular atom will decay. However, the half-life of a substance is constant and can be calculated using a mathematical formula. For example, if a substance has a half-life of 10 years, this means that after 10 years, half of the initial amount of the substance will have decayed, and after another 10 years, only a quarter of the original amount will remain, and so on.

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Answer:

v?

Explanation:

v = ∆s / ∆t

v =?

∆s = 236 - 218 = 18km

=t = 10: 30 - 10:15 = 15 minutes to hour 15/60 = 0.25h

v = 18 / 0.25

v = 72km / h

speed of 72km / h

Answer:

What is the figure? please provide

To calculate the magnetic induction inside the cylinder, we can use the following formula:

B(r,θ,z) = μH(r,θ,z)

where B is the magnetic induction, μ is the permeability of the material, and H is the magnetic field strength.

Since the cylinder is long and has a uniform radius, we can assume that the magnetic field strength is only a function of the z-coordinate. Additionally, since the cylinder is placed perpendicular to the magnetic field, the z-component of the magnetic field is equal to the external magnetic field strength B.

To determine the magnetic induction inside the cylinder, we need to solve for the magnetic field strength H. We can use the fact that potentials can be completely specified in terms of cos(o) cylindrical harmonics. This means that we can express the magnetic field strength as:

H(r,θ,z) = ∑(n=0 to ∞) [An cos(nθ) + Bn sin(nθ)] Jn(kr) cos(o)

where Jn is the nth order Bessel function and k is a constant that depends on the external magnetic field strength B and the permeability μ.

Using boundary conditions, we can determine the coefficients An and Bn and ultimately find the magnetic induction inside the cylinder.

In summary, to calculate the magnetic induction inside a long cylinder of radius a and permeability μ placed perpendicular to a uniform magnetic field B, we can use the formula B(r,θ,z) = μH(r,θ,z), express the magnetic field strength in terms of cylindrical harmonics, and use boundary conditions to determine the coefficients and ultimately find the magnetic induction inside the cylinder.

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The astronaut faces 1.71 rad/s angular velocity, 17.1 m/s linear velocity, 29.2 centripetal acceleration, 3 g's are experienced, and 2044 N of centripetal force. The torque experienced is zero

What is rotational motion?

An object is said to be in rotational motion when it is travelling in a circular route around a fixed axis. Centrifugal force is a radially outward force that the item experiences as a result of this motion.

The image given below explains the conversion. The torque is zero since there is no tangential force.

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A colloid is a combination in which one material is suspended throughout another substance and contains scattered insoluble particles. Blood is a colloid solution.

A colloid is a combination in which one material is suspended throughout another substance and contains scattered insoluble particles. The whole combination is referred to as a colloidal solution.

A colloid contains a dispersed phase a continuous phase. The colloidal mixture must either not settle or settle extremely slowly.

The above property is shown by the blood. Hence blood is a colloid solution.

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Answer:

heterogeneous , suspension

Explanation:  believe me or don't idc

The correct number from the options to describe the length of this metal bar is 15 cm or fifteen centimeters.

The most common units to measure length include:

The unit that should be used is centimeters, considering a rule usually contains centimeters, and this is the unit provided in the image.

Moreover, based on the rule it can be determined the length is 15 centimeters. Other numbers such as 15.0 or 15.000 are innaccurate as there is not need to add more figures in this case.

Note: This question is incomplete because the image is missing. Here is the image

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The eyes, spinal cord, and brain are all main or key parts of the nervous system.