Suppose an octopus knows an enemy is nearby. Which two things would the octopus most likely do to escape?
A. Hide in a small space
B. Find something to eat
C. Attract a mate
D. Change its color
E. Show happiness or sadness

The value of  force b if the magnitude the force is 26N is determined as 24 N.

The value of force is calculated by applying the formula for determining the magnitude of a force as shown below;

The magnitude of a force is calculated as;

F = √ x² + y²

where;

The given magnitude of the force = 26 N

The x component of the force = 10

The y component of the force = b

26 = √ ( 10²  + b² )

26² = 10² + b²

676 = 100 + b²

b² = 676 - 100

b² = 576

b = √ 576

b = 24 N

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Answer:

Vf = 15.19 [m/s]

Explanation:

To solve these problems we must use the following kinematics equation:

\(v_{f}=v_{i}-(g*t)\\\)

where:

Vf = final velocity [m/s]

Vi = initial velocity = 25 [m/s]

g = gravity acceleration = 9.81 [m/s^2]

t = time = 1 [s]

Note: the negative sign of the equation means that the gravitational acceleration acts in the opposite direction to the movement of the stone.

Now replacing:

Vf = 25 - (9.81*1)

Vf = 15.19 [m/s]

Therefore, the magnitude of the vector is approximately 361.3 meters.

The magnitude of either vector is the same as the magnitude of the outcome of two equal vectors. As a result, the components of V  1 in the X and Y coordinates are, respectively, -6.6 units and 0 units.

Using the Pythagorean equation, we can determine the magnitude of a vector with x and y components:

|v| = √(x² + y²)

where |v| denotes the vector's size.

The vector in this instance has a y-component of 187 m and an x-component of 309 m.

When we enter these numbers into the solution, we obtain:

|v| = √((-309)² + (187)²)

|v| = √(95658 + 34969)

|v| = √(130627)

|v| ≈ 361.3

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Explanation:

A concave lens is also known as a diverging lens because it is shaped round inwards at the centre and bulges outwards through the edges, making the light diverge. They are used to treat myopia as they make faraway objects look smaller than they are.

The three basic rules for the electric charge are like charges repel each other, unlike charges attract each other and the charges in the system are constant. The unit of charge is coulomb (C).

Electric charge is of two types and they are positive and negative charges. The negative charge is free electrons and the positive charges are the holes in the conductors. The basic rules are, two positive charges repel each other and two negative charges repel each other and they are called like charges.

One positive and one negative charge attract each other and hence they are unlike charges. The attractional force and repulsion force increase with a decrease in the distance of separation. The charges remain constant in the system and it is called as law of conservation of charges in the system.

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The initial momentum of the 25 kg object is 25 kg * 12 m/s = 300 kgm/s. After the collision, the momentum of the 25 kg object is 25 kg * 8 m/s = 200 kgm/s. According to the conservation of momentum, the momentum lost by the 25 kg object is equal to the momentum gained by the box. Therefore, the resulting momentum of the box is 300 kgm/s - 200 kgm/s = 100 kg*m/s.

Answer:

a

Explanation:

a) the path is circular

for circular moment, there is a centripetal force always perpendicular to the direction of movement (velocity)

The acceleration and velocity vectors of the particle becomes perpendicular everywhere along the path if the path is circular. So, the correct option is a.

Centripetal force is defined as the force required to keep an object in circular motion.

Here,

During the circular motion of the particle, a force is acting towards the center of the circular path executing by the particle, this force is called the centripetal force.

Since, the centripetal force is acting towards the center of the circular path, an acceleration is also acting towards the center called the centripetal acceleration.

The particle is moving in a circular path and during its motion, the direction of its velocity is towards the tangent of the circular path.

Therefore making the acceleration and velocity vectors perpendicular to each other.

Hence,

The acceleration and velocity vectors of the particle becomes perpendicular everywhere along the path if the path is circular.

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Answer:

3.04 m ???

Explanation:

The wavelength of the signal from  KPhET 98.7 radio station is 3.05 meter.

EM waves are another name for electromagnetic waves. When an electric field interacts with a magnetic field, electromagnetic waves are created. These electromagnetic waves make up electromagnetic radiations.

It is also possible to say that electromagnetic waves are made up of magnetic and electric fields that are oscillating. The basic equations of electrodynamics, Maxwell's equations, have an answer in electromagnetic waves.

As radio wave is electromagnetic wave, the speed of radio wave is 3.0×10⁸ m/s.

Given frequency of KPhET  is 9.87 x10⁷ Hz.

Hence, the wavelength of the signal from this radio station is = ( velocity ÷ frequency)

= 3.0×10⁸ m/s ÷  9.87 x10⁷ Hz.

= 3.05 meter.

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Answer:

The removal of heat energy slows the speed of particles

Explanation:

When you add heat to a substance, the heat energy gets transferred to kinetic energy, and the molecules began to move a greater distance at a greater speed. When you remove heat, the opposite happens.

Answer: By dividing airflow by duct cross section.

Explanation:

In short, air velocity in the ducts is calculated by dividing airflow by duct cross-section. Airflow is expressed as a simple number. Example: Air conditioner has a max. airflow of 600 CFM.

the relationship between speed distance and time is Speed=Distance/Time.

what is speed, distance and time?

Speed - The rate at which an object moves along a path is referred to as its speed. It is a scalar quantity.

Distance - It is defined as an object's entire movement without regard for direction.

Time - it is defined as a interval over which the change or event occurs.

relation between speed, distance and time

\(speed = \frac{distance }{time}\)

If the distance is in km and time is in hours, then the speed is km/hr.

If the distance is in m and the time is in seconds, then the speed is m/sec.

the relationship between speed distance and time is Speed=Distance/Time.

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Answer:

v=26.23*105 m/s

or 2.6 × 106 m/s

Explanation:

Force generated by magnetic field will only provide centripetal acceleration thus the entering speed will be same as the exit speed

so,

.5mv2=eV potential differnce*charge= kinetic energy

.5*35*1.66*10-27*v2= 1.6*10-19*5*250000

v2=68.84*1011

v=26.23*105 m/s

or 2.6 × 106 m/s

Answer:

Yes, the driver traveled far enough to reach the office.

Explanation:

We can use the formula

\(v=\frac{x}{t}\)

We are given

\(x=30\) KM

\(t=45\) min

\(v=50\) KM/H

Lets convert minutes to hours.

To convert minutes to hours divide the speed by 60.

\(\frac{45}{60} =\frac{3}{4} =0.75\)

Now we have

\(x=30\) KM

\(t=0.75\) H

\(v=50\) KM/H

\(v=\frac{x}{t}\)

Solve for x.

\(x=vt\)

Lets substitute our values into the equation.

\(x=50*0.75\)

\(x=37.5\)

\(37.5 > 30\) So the answer is yes;  the driver traveled far enough to reach the office.

The driver has to travel 35 km to reach the office. The distance he covered with a speed of 50 km/h within 45 minutes or 0.75 hour is 37.5 km. Hence, he travelled enough to reach the office.

Velocity of a moving body is the measure of distance it covered within unit time. The velocity is a vector quantity and have a magnitude and direction. The units of velocity are km/h, m/s etc.

Velocity is the ratio of change in distance to the change in time. Hence, distance can be calculated by multiplying the velocity with time.

Given that, velocity of the driver = 50 Km/h

time taken = 45 minutes = 45/60 =0.75 hr

Therefore, the distance = 0.75 hr × 50 km/h = 37.5 km

The distance to the office is 30 km. Therefore, the driver traveled far enough to reach the office.

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Answer:

Explanation:

a) KE = (1/2) * m * (\(v^{2}\)) = F * d = 14m * 200N = 2800 m/N or 2.8 * \(10^{3}\) m/N

b) 0J and 0m/s (if Marcella stopped after going 14 meters)

c)  Known from part (a) that KE = 2800 J = F1 * d1,

    2800J = F1 * (14m - 1m)  => F1 = 2800J/13m = 215.384 N

Answer:

1. B. Kinetic energy is transferred from Terry's foot to the soccer ball.

2. A. A baseball bat strikes a baseball.

3. A. 173.28J

4. D. Kinetic energy is transferred from the racket to the ball.

Explanation:

I took the quiz and got 100%

Answer:

1. Kinetic energy is transferred from Terry's foot to the soccer ball.

2. A baseball  bat stricks a baseball

3. 173.28

4. kinetic energy is transferred from the racket to the ball

5. 1,102.5 J

remember to keep the decimal on the last one

Explanation: They added another question so I decided to give the answer to those who had it.

Answer:

C - the greatest net force is on c with 25N - 10N = 15N

a = F / M

a = (v2 - v1) / t     so C has the greatest acceleration and will reach the greatest velocity

KE = 1/2 M v^2

The diagrams show four bodies moving in the directions shown. The only forces acting on the bodies are shown in each diagram. The option C body gains the most kinetic energy when moving a distance of 1.0m.

When some amount of force is applied on a object it can store a energy in that object. That is the kinetic energy. Mathematically the mass of the object and its change in acceleration in that object makes the kinetic energy. It is a vector quantity.

To calculate the kinetic energy we are using the formula,

U= (1/2)mv²

U = (1/2) ma²t²

Or, U= (1/2)ma × at²

Or, U= F × (1/2)at²

From this calculation we can see that if there is more force applied on a body that generates more kinetic energy on that object.

According to the question ,

Force of the object of Option A has (F) = f₂ - f₁

                                                                = (20 - 10)

                                                                = 10N

Force of the object of Option B has (F) = 10N

Force of the object of Option C has (F) = f₂ - f₁

                                                                 =(25-10)= 15N

Force of the object of Option D has (F) = f₂ - f₁

                                                                 = (30-30)

                                                                 = 0N

According to the question, option C has the most amount of force and we know the more force generate the more kinetic energy. So it has the more kinetic energy.

We can easily say that,  The option C body gains the most kinetic energy when moving a distance of 1.0m

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Answer:

Gravitational

Explanation:

Answer:

anything honestly

Explanation:

To determine the image characteristics using the 3 principal rays and SALTS (Size, Attitude, Location, Type), we'll consider both lenses and mirrors separately. Here's how you can analyze each case:

Lenses:

Place an object at different distances to the left of a lens with a focal length (f).

a) Object placed beyond 2f:

In this case, the object is placed far beyond twice the focal length of the lens.

Principal ray 1: A ray parallel to the principal axis will pass through the focal point on the opposite side.

Principal ray 2: A ray passing through the optical center will continue in a straight line without any deviation.

Principal ray 3: A ray passing through the focal point on the object side will emerge parallel to the principal axis.

The image will be formed on the opposite side of the lens, between the focal point and twice the focal length.

SALTS:

Size: The image will be smaller than the object.

Attitude: The image will be inverted.

Location: The image will be located between the focal point and twice the focal length.

Type: The image will be real.

b) Object placed at 2f:

In this case, the object is placed at twice the focal length of the lens.

Principal ray 1: A ray parallel to the principal axis will pass through the focal point on the opposite side.

Principal ray 2: A ray passing through the optical center will continue in a straight line without any deviation.

Principal ray 3: A ray passing through the focal point on the object side will emerge parallel to the principal axis.

The image will be formed on the opposite side of the lens at twice the focal length.

SALTS:

Size: The image will be the same size as the object.

Attitude: The image will be inverted.

Location: The image will be located at twice the focal length.

Type: The image will be real.

c) Object placed between f and 2f:

In this case, the object is placed between the focal point and twice the focal length of the lens.

In this case, the object is placed far beyond twice the focal length of the mirror.

Principal ray 1: A ray parallel to the principal axis will reflect through the focal point on the same side.

Principal ray 2: A ray passing through the focal point on the object side will reflect parallel to the principal axis.

Principal ray 3: A ray passing through the center of curvature will reflect back along the same path.

The image will be formed on the opposite side of the mirror, between the focal point and twice the focal length.

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The amount of work done by the hairdryer is equal to 450 Kilojoules.

Given the following data:

To determine the amount of work done by the hairdryer:

Mathematically, the work done by an object with respect to power and time is given by the formula:

\(Work\;done = power \times time\)

Substituting the given parameters into the formula, we have;

\(Work\;done = 750 \times 600\)

Work done = 450,000 Joules

Note: 1000 Joules = 1 Kilojoules.

Work done = 450 Kilojoules.

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The distance travelled in that month is 870.92 miles

We'll begin by calculating the circumference of the tyre. This can be obatined as follow:

C = 2πr

C = 2 × 3.14 × 13

C = 81.64 in

63360 inches = 1 mile

Therefore,

81.64 inches = (81.64 inches × 1 mile) / 63360 inches

81.64 inches = 0.00129 mile

Distance = number × circumference

Distance = 0.00129 × 675135

Distance = 870.92 miles

Thus, the distance travelled in that month is 870.92 miles

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The potential energy of the roller coaster is 176,400 J (joules).

The potential energy of an object is given by the formula PE = mgh, where PE is the potential energy, m is the mass of the object, g is the acceleration due to gravity, and h is the height or vertical position of the object.

In this case, the roller coaster is at a peak of 20m and has a mass of 900kg. The acceleration due to gravity, g, is approximately 9.8 \(m/s^2\).

Using the formula, we can calculate the potential energy:

PE = mgh

= (900 kg)(9.8 \(m/s^2\))(20 m)

= 176,400 J

Therefore, the potential energy of the roller coaster is 176,400 J (joules).

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Answer:

The tissue that holds bones together at movable joints is ligaments. Ligaments are strong, fibrous connective tissues that connect bones to other bones, providing stability and limiting excessive movement at the joints. They help to maintain the proper alignment and function of the joints while allowing for controlled movement.

Explanation:

The tissue that holds bones together at movable joints is ligaments. Ligaments are strong, fibrous connective tissues that connect bones to other bones, providing stability and limiting excessive movement at the joints. They help to maintain the proper alignment and function of the joints while allowing for controlled movement.

Answer:

The answer is ligaments!

Explanation:

Hope this helps!! :)

Answer:

1 km

Explanation:

displacement =velocity ×time

displacement =40m/s ×25s

displacement =1000m equivalent to 1km

Answer:

Tycho Brahe

Explanation:

Tycho Brahe's accurate observations of planetary positions provided the data used by Johannes Kepler to derive his three fundamental laws of planetary motion.

Answer:

A. Tycho Brahe

Explanation:

the person above is correct :)

A balanced force is referred to as when all the applied forces create an equilibrium which is therefore denoted as option A.

This is referred to as an influence that can change the motion of an object and the formulas is F= ma where m is the mass and a is acceleration of the body involved with its unit being Newton.

Equilibrium on the other hand  is referred to as as a state in which all the individual forces and torques exerted upon an object are balanced and there is no movement of the body in any type of direction in this type of scenario.

Balanced force is referred to as a situation in which all the applied forces which creates an equilibrium as denoted above which is therefore the reason why option A was chosen as the correct choice.

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Answer:

Well velocity is the varaible with direction

Explanation: