A body may have zero velocity even though it's speed is 10m/s​

Answer:

Answer:

The velocity of the ball when it reaches its highest point is  0

Explanation:

The velocity of the ball when it reaches its highest point is 0

Once the ball is tossed into the air, as it goes up, the initial velocity with which it was thrown, reduces, as the motion of the ball is hindered by several forces such as gravity and air resistance. This slows down the velocity of the ball, up until it reaches a point, where the upwards velocity of the ball becomes zero. at this point, the ball begins to fall back to the ground.

If the brake warning light remains on after you have started the engine and released the parking brake, the first corrective step is to check the brake fluid level in the vehicle's brake master cylinder reservoir.

To do this, follow these steps: Park your vehicle on a level surface and turn off the engine.

Open the hood of your vehicle and locate the brake master cylinder reservoir. it is usually located on the driver's side, near the firewall, and is a small plastic or metal container labeled "brake fluid."

Clean the top of the reservoir to prevent any dirt or debris from falling into it. Remove the cap from the reservoir. Most reservoir caps twist off, but some may have a clip or locking mechanism.

Check the brake fluid level. There should be a minimum and maximum level marked on the side of the reservoir. The fluid should be between these two marks. If it is below the minimum level, you may have a brake fluid leak or excessive brake pad wear.

If the brake fluid level is low, you will need to add brake fluid to the reservoir. Use the type of brake fluid recommended by the vehicle manufacturer. Pour the fluid carefully into the reservoir, being cautious not to spill any on the surrounding components.

After adding brake fluid, securely tighten the reservoir cap. Start the engine and check if the brake warning light has turned off. If it remains on, there may be another issue with the braking system that requires further inspection and repair by a qualified mechanic.

Remember, if you're not familiar or comfortable with checking the brake fluid or if you suspect a more serious problem with the braking system, it's best to have a professional mechanic inspect your vehicle to ensure your safety on the road.

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The amount of thermal energy required to increase the temperature of a 10kg block of iron from 15 °C to 25 °C is 44 J

First, we shall list out the given parameters from the question. This is given below:

The thermal energy required can be obtained by using the formular illustrated below:

Q = MCΔT

Q = 10 × 0.44 × 10

Q = 44 J

Thus, we can conclude that the thermal energy required is 44 J

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The height of the frictionless playground slide needs to be approximately 1.03 meters for the 35 kg child to reach the bottom with a speed of 4.5 m/s.

To determine the height (h) of a frictionless playground slide required for a 35 kg child to reach the bottom with a speed of 4.5 m/s, we can use the principle of conservation of energy. At the top of the slide, the child has gravitational potential energy, which is converted into kinetic energy at the bottom of the slide.

The formula to calculate gravitational potential energy (PE) is:

PE = m * g * h

Where:

m = mass of the child (35 kg)

g = acceleration due to gravity (9.8 m/s²)

h = height of the slide (to be determined)

The kinetic energy (KE) of the child at the bottom of the slide is given by:

KE = 1/2 * m * v²

Where:

v = speed of the child at the bottom (4.5 m/s)

According to the conservation of energy principle, the gravitational potential energy at the top is equal to the kinetic energy at the bottom:

PE = KE

Therefore, we can equate the two equations:

m * g * h = 1/2 * m * v²

Simplifying the equation:

g * h = 1/2 * v²

Now we can solve for h:

h = (1/2 * v²) / g

Plugging in the values:

h = (1/2 * (4.5 m/s)²) / (9.8 m/s²)

Calculating:

h = (1/2 * 20.25 m²/s²) / 9.8 m/s²

h = 10.125 m²/s² / 9.8 m/s²

h ≈ 1.03 m

Therefore, the height of the frictionless playground slide needs to be approximately 1.03 meters for the 35 kg child to reach the bottom with a speed of 4.5 m/s.

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The tension TB in the cable that makes an angle of 40° with the vertical is approximately 60,902.9 N, and the tension TA in the horizontal cable is approximately 37,964.8 N.

To find the tension TB in the cable that makes an angle of 40° with the vertical, we can use the formula:

TB = mg/cosθ

where m is the mass of the wrecking ball, g is the acceleration due to gravity, and θ is the angle the cable makes with the vertical.

Plugging in the given values, we get:

TB = (3860 kg)(9.8 m/s²)/cos(40°)

TB = 47,446.8 N/cos(40°)

TB ≈ 60,902.9 N

To find the tension TA in the horizontal cable, we can use the formula:

TA = mg tanθ,

where m is the mass of the wrecking ball, g is the acceleration due to gravity, and θ is the angle the cable makes with the vertical.

Plugging in the given values, we get:

TA = (3860 kg)(9.8 m/s²)tan(40°)

TA = 47,446.8 N tan(40°)

TA ≈ 37,964.8 N

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The second smallest planet in our solar system is Mars.

Mars is the answer to the question. It is the fourth planet from the Sun and is often referred to as the "Red Planet" due to its reddish appearance.

In terms of size, Mars is the second smallest planet in our solar system, with a diameter of approximately 6,779 kilometers (4,212 miles).

Mercury is the smallest planet in our solar system, but since the question asks for the second smallest planet,

Mars fits the criteria. It is larger than Mercury, Earth being the third smallest and Venus being the fourth smallest.

Mars has been a subject of fascination and exploration due to its potential for hosting life and its similarity to Earth in certain aspects.

Multiple space missions, including rovers and orbiters, have been sent to Mars to study its surface, atmosphere, and search for signs of past or present life.

Overall, Mars holds a significant place in our solar system as a neighboring planet that has captivated scientific interest and continues to be a target for future exploration.

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The uniformitarianism states that the forces that are changing Earth's surface today are the same forces that changed Earth's surface in the past as a result of the same types of agents being present all along.

This type of doctrine talks about how the earth's geologic processes are the same as a result of the agents of weathering such as glacier, wind etc being the same in this type of scenario.

Weathering is referred to the process in which rocks are broken down into smaller particles to form soil. The agents of weathering has been the same today and in the past which makes it constant.

This is therefore the reason why Uniformitarianism was chosen as the most appropriate choice.

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(A) 300 J of labour are needed to stop the hoop. The hoop has a kinetic energy of \((1/2)mv2 = 300 J.\)  (B) The hoop will roll up the slope for 2.55 m before coming to a stop and rolling back down.

(A) The hoop has a kinetic energy of\((1/2)mv2 = 300 J\). The needed labour is also 300 J since an equivalent amount of work must be done to stop the hoop.

(b) When the hoop ascends the slope, its initial kinetic energy is transformed into potential energy. All of the kinetic energy has been transformed into potential energy at the highest point, making the potential energy there also 300 J. m represents the hoop's mass, and h is the height attained, therefore mgh = 300 J. We arrive at h = 3.06 m after solving for h. The distance climbed up the incline is then calculated using the formula \(d = h/sin(),\)  where is the incline's angle. With the values substituted, we obtain d = 2.55 m.

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Answer:

A object, lets say a cup. This cup will never, ever move unless something or someone disturbs it. If something touches or hits this cup the cup will move. But, until the cup gets touched, nothing will EVER make it move.

Explanation:

I hope this helps!!

The car slows down by acceleration - 10 m/s² before stopping.

Given data are:

Initially moving at 30 m/s

The car's final speed is 0 m/s as it comes to a halt.

t = 3.0 seconds.

Acceleration equals a.

using the equation v = u + at, we obtain

0 = 30 + 3t

a = - 10 m/s²

The vehicle suffers a - 10 m/s² slowdown as a result.

Acceleration is the general term for any process where the velocity changes. There are only two ways to accelerate: either by increasing speed or decreasing direction, or both. The reason for this is that velocity includes both a speed and a direction.

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According to the given statement the car slows down by acceleration - 10 m/s² before stopping.

Any procedure where the velocity varies is referred to as acceleration. There are only two ways to accelerate: either by accelerating faster, or by accelerating in the opposite direction. This is because velocity consists of both a speed and a direction.

v = initial velocity (20m/s)

u = final velocity (0 m/s)

t = 3.0 seconds.

Acceleration equals a.

Using the equation v = u + at, we obtain

30 = 0 + at

a = - 10 m/s²

The car's acceleration  is -10m/s².

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Answer:

one object speeds up and the other slows down

Explanation-

they will have unequal accelerations as a result of the contact force that results during the collision

Answer:

one object speeds up and the other slows down

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What happens after condensation to cause precipitation

The center of the iron star that is best situated to advance its own interests by influencing the other points of the star. All of the points of the star are interconnected and influence each other.

The best way to advance the interests of the iron star is to work together as a team to achieve common goals.The point of the iron star that is best situated to advance its own interests by influencing the other points of the star is the point that is most centrally located.

This point is best positioned to exert influence over the other points because it is in the best position to communicate with and control them. The point that is most centrally located is also in the best position to monitor the activities of the other points and to coordinate their activities.

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It is B: low precision,low accuracy

Explanation:

Have a great day =)

The coefficient of static friction needed for the car not to skid at 89 km/h on a properly banked curve with a radius of 86 m is approximately 0.47.

A force called static friction prevents an object from moving along the path. This friction happens when two materials are slid over one another. Conflict is there all around us. For instance, when we walk, our feet are in contact with the ground.

μs = tan(x)

where μs is the coefficient of static friction, and θ is the angle of banking of the curve.

The angle of banking can be calculated as:

\(x = tan^-1(v^2 / rg)\)

where v is the speed of the car, r is the radius of the curve, and g is the acceleration due to gravity \((9.81 m/s^2).\)

We first need to convert the given speeds to meters per second:

\(67 km/h = 18.61 m/s\\89 km/h = 24.72 m/s\)

Substituting the given values into the equation for the angle of banking, we get:

\(x = tan^-1((24.72 m/s)^2 / (86 m * 9.81 m/s^2)) =25.2\)

Now we can use this angle to calculate the coefficient of static friction needed for the car not to skid at 89 km/h:

μs = tan(θ) = tan(25.2°) ≈ 0.47

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Answer:

1,900 J

Explanation:

The number of moles of helium gas, n = 2 moles

The pressure of the helium gas, p = 1.0 × 10⁵ Pa

The initial temperature of the gas, T₁ = 2°C = 275.15 K

The final temperature of the gas, T₂ = 112°C = 385.15 K

The initial volume of the gas, V₁ = 45 liters

Cp = 20.8 J/(mol·K), Cv = 12.6 J/(mol·K)

The work done by the gas having constant pressure expansion is given as follows;

From the ideal gas law, we have;

\(V_2 = \dfrac{T_2 \times n \times R}{P}\)

Where;

R = The universal gas constant = 8.314 J/(mol×K)

Therefore, we get;

\(V_2 = \dfrac{385.15 \, K \times 2 \, moles \times 8.314 \, \dfrac{J}{mol \cdot K} }{1.0 \times 10^5 \ Pa} \approx 64.0 \, L\)

The work done, W = P ×ΔV = P × (V₂ - V₁)

∴ W = 1.0 × 10⁵ Pa × (64.0 L - 45.0 L) = 1,900 J

The work done by the gas as it expands, W = 1,900 J.

Answer:

It is a renewable resource as it renewably heats up water to a high temperature. Geothermal energy is more environmentally friendly than conventional fuel sources such as coal and other fossil fuels. In addition, the carbon footprint of a geothermal power plant is low.

Disadvantages: If dug deep underground, it can cause earthquakes. generates waste, reservoirs require proper management, it's location-specific, has high initial cost

The induced EMF in the wire is 0.15625 volts when the wire moves in a perpendicular direction through Earth’s magnetic field.

Induced EMF (electromotive force) is a voltage that is produced in a conductor when it is moved through a magnetic field or when there is a change in the magnetic field around the conductor.

The EMF  induced in the wire is given by the equation:

EMF = BLv

where B is the strength of the magnetic field, L is the wire length, and v is the velocity of the wire relative to the magnetic field.

Substituting the given values, we get:

EMF = (5.0 x 10⁻⁵ T) * (25 m) * (125 m/s)

EMF = 0.15625 V

The magnitude of the induced EMF depends on the strength of the magnetic field, the speed at which the conductor is moving, and the angle between the magnetic field and the direction of motion of the conductor. This phenomenon is known as electromagnetic induction.

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Answer:

false

Explanation:

The statement "An orbiting satellite experiences no force due to the Earth's gravity." is a False statement. This is further explained below.

Generally, Gravity is simply defined as the force that pulls items toward the center of a planet or other entity.

In conclusion, an orbiting satellite experiences force due to the Earth's gravity.

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Answer:

the answer is

Explanation:For equilibrium

Weight = Tension

mg=T

∴T=4×3.1π=12.4πN (as can be inferred from the question)

Y=

△l/l

T/A

​

=

1000

0.031

​

/20

12.4π/π(

1000

2

​

)

2

​

=

4×0.031

12.4×20×1000×(1000)

2

​

=2×10

12

N/m

2

Answer:

a) 37.5N

b) 9.375Joules

Explanation:

a) According to Hooke's law

F = ke

k is the spring constant

e is the extension;

F = 150 * 0.25

F = 37.5N

b) Work done on the spring = 1/2ke^2

Work done on the spring = 1/2 * 150 * 0.25^2

Work done on the spring  = 75 * 0.0625

Work done on the spring  = 9.375Joules

(a)  The force required to stretch the spring is of 37.5 N.

(b)  The work done on the spring is of 4.6775 J.

Given data:

The force constant of a spring is, k = 150 N/m.

The stretching distance of spring is, x = 0.25 m.

(a)  

When some force is experienced on the spring, then due to this force then it will displace. Then, the expression for the force applied on the spring is given as,

\(F = k \times x\)

Solve by substituting the values as,

\(F = 150 \times 0.25\\\\F = 37.5 \;\rm N\)

Thus, we can conclude that the force required to stretch the spring is of 37.5 N.

(b)

And the expression for the work done on the spring is given as,

\(W = \dfrac{1}{2}kx^{2}\)

Solving as,

\(W = \dfrac{1}{2} \times 150 \times 0.25^{2}\\\\W = 4.6875 \;\rm J\)

Thus, we can conclude that the work done on the spring is of 4.6775 J.

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At 3 seconds, the object changes its direction of motion with the equation v = (4.2 m/s) - (1.4 m/s2)t.

The explanation describes the speed of an object and how this speed changes depending on time.

Equation of velocity

V = (4.2 m/s) - (1.4 m/s²)t

When an object changes its direction, it momentarily comes to rest at point B.

V = 0

0 = 4.2 - 1.4 t

t = 4.2 : 1.4 = 3 sec

3 sec after the object changes its direction.

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Answer:

60 - 45 = A. 15

Explanation:

Subtracted because the plane mirror at an angle is incidence of 60°, so then in order to find the value it would be 60-45 and not adding it or dividing and multiplying to find the value thus the answer is 15.

60 - 45 = A. 15. Subtracted because the plane mirror at an angle is incidence of 60°, so then in order to find the value it would be 60-45 and not adding it or dividing and multiplying to find the value thus the answer is 15.

A flat or highly polished surface called a plane mirror reflects light or waves to create an image. It is a polished, smooth surface that creates a virtual representation of the actual object.

A plane mirror is a surface on which an image can only be produced by at least two light beams. The intersection of these two beams can occur inside the mirror or appear to occur somewhere behind the mirror.

The image that follows illustrates how an object appears when viewed via a plane mirror.

Therefore, 60 - 45 = A. 15. Subtracted because the plane mirror at an angle is incidence of 60°, so then in order to find the value it would be 60-45 and not adding it or dividing and multiplying to find the value thus the answer is 15.

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Answer:

hope this helps

Explanation:

Of the three phases of matter (gas, liquid, and solid), sound waves travel the slowest through gases, faster through liquids, and fastest through solids

so your answer would be B.

In order to properly configure the smart light bulbs, buyers should read the installation and configuration manual before connecting or using them to avoid possible damage due to improper handling.

The user manual is a tool that is usually included when we buy a product. This manual includes all the characteristics of the object that we have purchased and the recommendations and specifications for correct use and maintenance to prolong its useful life.

According to the above, what the common buyer should do to prevent their bulbs from being damaged and to be able to configure them properly is to read the user manual.

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The volume of 1 liter is equal to 1 x 10^-3 cubic meters (m³). This conversion is based on the relationship between the dimensions of the cube (given in centimeters) and the conversion factor from centimeters to meters.

To convert the volume of 1 liter to cubic meters, we need to use the conversion factor between liters and cubic meters. The conversion factor is 1 liter = 1 x 10^-3 cubic meters.

Given that 1 cm is equivalent to 1 x 10^-2 m, we can calculate the volume of the cube in cubic meters.

Cube's volume:

Volume = length x width x height

Since all sides of the cube have the same length (10 cm or 10 x 10^-2 m), the volume of the cube is:

Volume = (10 x 10^-2 m) x (10 x 10^-2 m) x (10 x 10^-2 m)

= 10^-3 m³

Therefore, 1 liter is equal to 1 x 10^-3 cubic meters (m³).

The volume of 1 liter is equivalent to 1 x 10^-3 cubic meters (m³). This conversion is based on the relationship between the dimensions of the cube (given in centimeters) and the conversion factor from centimeters to meters.

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