Could I please get some help l, will mark as Brianalist if right....​

Answer: 144 km/h

Explanation:

The distance between Toronto and Waterloo is 288 km. The student traveled from Toronto to Waterloo at a speed of 96 km/h, so the total distance traveled is 288 km (96 * 3). The student traveled back from Waterloo to Toronto in 2 hours, so the average speed on the way back is 144 km/h (288 / 2).

However, we cannot know the exact speed on the way back without knowing the student's exact route. If the student took the same route on the way back, then the average speed is 144 km/h. However, if the student took a different route on the way back, then the average speed could be different. For example, if the student took a more direct route on the way back, then the average speed could be higher. If the student took a more scenic route on the way back, then the average speed could be lower.

Therefore, the best answer to the question is that the average speed on the way back is 144 km/h assuming the student took the same route back.

To calculate the experimental gravitational acceleration from the average (mean) time of fall, we can use the equation:

g = (2h) / (t^2)

Where:

g is the gravitational acceleration,

h is the height from which the object is dropped, and

t is the average time of fall.

Let's assume that the height from which the object is dropped is h = 1 meter and the average time of fall is t = 2 seconds.

Substituting these values into the equation, we have:

g = (2 * 1) / (2^2)

g = 2 / 4

g = 0.5 m/s^2

Therefore, the experimental gravitational acceleration calculated from the average time of fall is approximately 0.5 m/s^2.

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Answer:

Explanation:

A simple pendulum consists of a mass (usually represented as a small object or bob) attached to a string or rod of negligible mass. The mass is free to swing back and forth under the influence of gravity.

In the figure, the point of suspension is denoted by "O," and the mass (bob) is represented by the small circle. The string or rod is represented by the vertical line connecting the point of suspension to the bob.

Amplitude:

The amplitude of a pendulum refers to the maximum displacement or swing of the bob from its equilibrium position. In the figure, the amplitude can be represented by the angle formed between the vertical position and the position of the bob when it swings to its maximum distance on one side. It is usually denoted by the symbol "A."

Effective Length:

The effective length of a pendulum refers to the distance from the point of suspension to the center of mass of the bob. It represents the distance over which the mass swings back and forth. In the figure, the effective length can be measured as the length of the string or rod from the point of suspension to the center of the bob. It is usually denoted by the symbol "L."

It is important to note that the amplitude and effective length of a simple pendulum affect its period of oscillation (the time taken for one complete swing). The relationship between these parameters and the period can be described by mathematical formulas.

Overall, the simple pendulum is a fundamental concept in physics and provides a simplified model for understanding oscillatory motion and the principles of periodic motion.

Answer:

Option C) Fluorine and Chlorine.

Explanation:

According to the given options; the two elements that have similar characteristics are Fluorine and Chlorine.

As both the elements belong to the same group in the periodic table which is the halogen group and they have the same valency although their reactivities differ. Fluorine is more reactive than chlorine if compared. They both are placed in the same group which is Group 7 in the modern periodic table. As both the elements have 7 electrons in their outermost shell.

Answer:

A. Rock cycle

Explanation:

Because it really is the change of a rock from another, like ingenuous, sedimentary rock..

Answer:

They are all units of pressure

Answer:

0

Explanation:

On a velocity - time graph, if the line crosses the x - axis it depicts that the object has started moving in the opposite direction.

Answer:

The strength of gravity decreases.

An example of that would be if you were in space; you float around because there's no gravity.

Answer:

0.16 A

Explanation:

V = IRtotal

24V = I(100 + 40 + 10)

I = 0.16 A

Answer: 0.16 is correct

Explanation:

Seawalls create barriers that prevent floodwaters from entering the protected area. The correct option is C.

Installing a seawall helps mitigate flood damage by creating a barrier that prevents floodwaters from entering the protected area.

Seawalls are typically constructed along coastlines or riverbanks and act as a physical barrier against incoming floodwaters.

When flood events occur, the seawall helps to block and redirect the force of the water, reducing the impact on the protected area.

By preventing floodwaters from inundating the land, seawalls help to safeguard infrastructure, homes, and communities from damage caused by flooding.

They provide a measure of protection and help to mitigate the potential risks and consequences associated with flooding events.

Thus, the correct option is C.

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Your question seems incomplete, the probable complete question is:

How does installing a seawall help mitigate flood damage?

A) Seawalls redirect floodwaters away from the protected area.

B) Seawalls absorb floodwaters to prevent overflow.

C) Seawalls create barriers that prevent floodwaters from entering the protected area.

D) Seawalls increase the capacity of nearby water bodies to hold floodwaters.

Answer:

a. normal

Explanation:

In the field of physics the normal is a line drawn at a right angle to a barrier. In other words the normal line is the line that is drawn perpendicular (right angle, 90 degrees) to the reflective surface of a mirror, or the particular boundary in which refraction occurs at the point of incidence of a light ray. This can be seen in the picture attached below.

The downward momentum initially given is carried by the exhaust gases expelled from the rocket engines.

According to the law of conservation of momentum, the total momentum of a system remains constant if no external forces act on it. In the case of a rocket launching from a launch pad, the upward momentum of the rocket is balanced by an equal and opposite downward momentum given to something else in the system.

Typically, in rocket launches, the downward momentum is given to the exhaust gases expelled from the rocket engines. As the rocket engines expel gases at high speeds in the downward direction, the gases carry a significant amount of momentum in that direction. This downward momentum of the exhaust gases is equal in magnitude but opposite in direction to the upward momentum of the rocket.

So, in the scenario described, the downward momentum initially given is carried by the exhaust gases expelled from the rocket engines.

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The highest flux would be reached if the planar surface was perpendicular to the electric field vector.

The electric flux through a planar area is defined as the electric field multiplied by the area component perpendicular to the field. If the area is not planar, the flux must be evaluated using an area integral because the angle is constantly changing.

The electric flux (E) travelling through a surface of vector area S is: E = ES = EScos, where E is the magnitude of the electric field (in units of V/m), S is the area of the surface, and is the angle between the electric field lines and the normal (perpendicular) to S.

To know more about The electric flux (E) travelling through a surface of vector area S is: E = ES = EScos, where E is the magnitude of the electric field (in units of V/m), S is the area of the surface, and is the angle between the electric field lines and the normal (perpendicular) to S.

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Answer:

3a) k = 500 N/m

3b) x = 0.05 m

3c) F = 2.5 N

4a) W = 120 N

4b) W = 5 N

4c) W = 0.2 N

Explanation:

3a) Force; F = 10 N.

Extension; x = 20 mm = 0.02 m

Formula for spring constant is;

K = F/x = 10/0.02

k = 500 N/m

3b) Force is now; F = 25 N

Since k = 500 N/m

Then x = F/k = 25/500

x = 0.05 m

3c) extension is now 5 mm = 0.005 m

Thus; F = kx = 500 × 0.005

F = 2.5 N

4a) Formula for weight is;

W = mg.

g = 10 N/kg

m = 12 kg

Thus; W = 12 × 10

W = 120 N

4b) Mass; m = 500 g = 0.5 kg

Thus; W = 0.5 × 10

W = 5 N

4c) mass; m = 20 g = 0.02 kg

W = 0.02 × 10

W = 0.2 N

Answer:

2.66 m/s² .

Explanation:

Initial velocity , u = 0 m/s

Final Velocity , v = 8 m/s

Time Taken , t = 3 s

So , Acceleration = (v-u)/t = (8 m/s - 0 m/s) /3 sec . = 8/3 m/s² = 2.66 m/s²

2269 × 10-³ m can be written in scientific notation as follows: 2.269 × 10⁰.

Scientific notation is a method of writing, or of displaying real numbers as a decimal number between 1 and 10 followed by an integer power of 10.

It is an alternative format of such a decimal number immediately followed by E and an integer.

According to this question, 2269 × 10-³ metres is to be converted to scientific notation. We do this by shifting the decimal place backwards three times to obtain the following;

2.269 × 10⁰

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An electron moving in a uniform magnetic field experiences the maximum magnetic force when the angle between the direction of the electron's motion and the direction of the magnetic field is 90°. So, option C) is correct.

The correct answer is C) 90°. This is because the magnetic force on a charged particle, say, an electron, moving in a magnetic field is given by F = qvBsinθ, where q is the charge of the particle, v is its velocity, B is the magnetic field strength, and θ is the angle between the velocity vector and the magnetic field vector.

When θ = 90°, sinθ = 1, and therefore the magnetic force is at its maximum value. When θ = 0° or 180°, sinθ = 0, and the magnetic force is zero.

When θ = 45°, sinθ is less than 1, so the magnetic force is less than its maximum value.

The magnetic force acting on a moving charged particle is given by F = q(v × B), where F is the magnetic force, q is the charge of the particle, v is its velocity, and B is the magnetic field.

The cross product (v × B) in the formula implies that the magnetic force is at its maximum when the angle between the velocity and the magnetic field is 90 degrees.

So, option C) is correct.

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Answer:

57

Explanation:

Answer:

A generator converts mechanical energy into electrical energy, while a motor does the opposite - it converts electrical energy into mechanical energy. Both devices work because of electromagnetic induction, which is when a voltage is induced by a changing magnetic field.

Answer:

When electricity is passed through the wire, it produces an electromagnetic field. This field pushes on the magnet, causing it to rotate. The rotation can be harnessed to push a wheel or other device.

Explanation:

Hope this helps ^^

Answer:

Place some smooth tiles under the dresser

Smooth surfaces, like smooth tile, are easy to slide over. They create very little friction. Rough surfaces like carpet create much more friction.

remove the drawers from the dresser

Weight affects friction in that friction is directly proportional to the weight of the load one is moving. So reduce the weight, reduce the friction.

Explanation:

Speed does not impact friction, so moving the dresser slower won't help. Wind has nothing to do with the scenario, so that's not a correct option.

The magnitude of the charge is 12 N  in the opposite direction of the field.

The term electric field refers to the region in space where the effect of a charge is felt. In this case, we are told that the magnitude of the charge is  –0.06 C.

Hence;

E = F/q

F = Eq

F = –0.06 C * 200 N/C

F = 12 N

Hence, the magnitude of the charge is 12 N  in the opposite direction of the field.

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Answer:

A

Explanation:

Edge

2.666k is the total energy

If you plot the voltage drop across a capacitor vs time for a capacitor discharging through a resistor, you would get an exponential decay plot.

This is because the voltage drop across the capacitor decreases exponentially over time as the capacitor discharges through the resistor. Initially, the voltage drop is high but as the capacitor discharges, the voltage drop decreases. The time constant of the circuit, which is the product of the resistance and the capacitance, determines the rate of decay of the voltage drop. As time goes on, the voltage drop across the capacitor will approach zero, and the capacitor will be fully discharged. This type of plot is commonly used in electronics to analyze circuits that involve capacitors and resistors. So, the answer to your question is b. Exponential decay.

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Answer:

The value of Force is

\(f = 0.031n\)

Explanation:

Greetings!!!

Mass(m)= 0.005kg

Acceleration (a)= 6.2m/s²

Force= ?

Firstly, recall the Newton's second law.

substitute known variables into the equation.

Solve for Force.

If you have any questions or unclear ideas tag on comments.

Hope it helps!!!

The force of the bullet is  0.031 N.

The force of the bullet is calculated by applying Newton's second law of motion as shown below.

Mathematically, Newton's second law of motion is given as;

F = ma

where;

The force of the bullet is calculated as follows;

F = 0.005 kg  x  6.2 m/s²

F = 0.031 N

Thus, the force of the bullet is a function of the mass and the acceleration of the bullet.

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A truck enters a highway driving 60 mph A car enters the highway at the same place 0 nutes later and dives 72 mph in t The car will pass the truck in (Round to the nearest minute) minutes same direction From So the car enters the highway,However, this contradicts the information given that the car enters the highway 0 minutes later than the truck.

To determine how long it will take the car to pass the truck, we can set up an equation based on their relative speeds and distances traveled.

Let's assume that the car passes the truck after time 't' minutes.

In 't' minutes, the truck will have traveled a distance of 60 × (t/60) = t miles.

The car enters the highway 0 minutes later and travels at a speed of 72 mph. Therefore, when the car passes the truck, it will have traveled a distance of 72 × (t/60) = 1.2t miles.

To find when the car passes the truck, we can set up the following equation:

t = 1.2t

Simplifying the equation, we get:

t - 1.2t = 0.2t

0.2t = 0

This equation does not yield a valid solution since it implies that the time required for the car to pass the truck is 0 minutes. However, this contradicts the information given that the car enters the highway 0 minutes later than the truck.

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Answer:

4.395kg

Explanation:

1kg=1000g

Therefore, 4395g/1000g=4.395kg