The purple arrow on the graph shows speed and direction.
What is this arrow called?

A. an acceleration arrow
B. a vector
C. a force arrow
D. a speed arrow

Explanation:

a) Velocity and acceleration of a car are parallel when the car is moving along a straight line in the same direction. For example, when a car is gaining speed as it moves forward in a straight line, both velocity and acceleration are directed in the same direction.

b) Velocity and acceleration of a car are anti-parallel when the car is moving along a straight line in the opposite direction. For example, when a car slows down while moving in a straight line, its acceleration is directed opposite to the direction of its velocity, or the other way around.

Answer:

a)

There is only one case where velocity and acceleration are parallel only when they are moving in the same direction.

b)

There are 3 cases where velocity and acceleration are antiparallel.

(i) When both are moving in different direction

   It means :

(ii) When the object is slowing down, where velocity and acceleration are in the opposite direction.

(iii) In case of motion reversal.

Explanation:

The beat frequency is 3 beats/sec.

Beat frequency(n) can be found by using the following formula:

n=f2-f1, where f2 and f1 are the given frequencies

n= 515-512

n= 3 beats/sec

Therefore the beat frequency when 512 Hz and 512Hz tuning forks are sounded together is 3 beats/sec.

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Answer:

100n

Explanation:

Answer:

-100N

I hope this helps!

Answer:

the projection of a vector quantity, as force or velocity, along an axis.

Explanation:

Answer:

d

Explanation:

Answer:

Earth absorbs heat from the sun.

Explanation:

This radiation is absorbed by greenhouse gases which then radiate energy into all directions including downwards and thereby trapping heat in the atmosphere.

Hope you have a good day :)

(a) The location of the final image beyond the converging lens is 12.67 cm.

(b) The magnification of the final image is -0.82, indicating that it is inverted with respect to the object.

To find the location of the final image, we can use the lens formula for thin lenses, which is given by 1/f = 1/v - 1/u, where f is the focal length, v is the image distance, and u is the object distance.

For the diverging lens, u = -27 cm (since the object is in front of the lens), and f = -17 cm (negative for diverging lens). Using the lens formula, we find v1 = -153 cm.

For the converging lens, the object distance is -11 cm (since it is behind the diverging lens), and f = 17 cm. Using the lens formula again, we find v2 = 12.67 cm.

The magnification of the final image can be calculated using the formula magnification = v2/v1, which gives us -0.82. The negative sign indicates that the image is inverted with respect to the object.

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Answer:

COMPOUND

Explanation:

The reactants have a higher potential energy and energy is released.

The potential energy graph shows a plot of the progress of a reaction. The hump on the graph is the activation energy of the reaction.

The statement that best describes the  total energy change of the system is that; reactants have a higher potential energy and energy is released.

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Answer:

B. when it loses a piece

Explanation: it likely gets lighter

To maximize the objective function p with the given constraints, we use linear programming by identifying the feasible region.

Finding corner points, evaluating p at each point, and selecting the point with the maximum value of p.In this case, the given constraints are x = 0, y = 0, 2x + 2y = 4, and x + y = 8. To maximize the objective function p, we follow these steps:Identify the feasible region by graphing the constraints on a coordinate plane.

The corner points, which represent the vertices of the feasible region.Evaluate the objective function p at each corner point.Select the point with the maximum value of p as the optimal solution that maximizes p while satisfying the given constraints.

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The angular frequency of this motion is 5.46 rad/s.

The oscillation of spring is an example of Simple Harmonic Motion(SHM).

The general equation of an SHM is given by the formula.

X = Acos(wt)

Here A is the amplitude

ω is the angular frequency

T is the time

Comparing the above equation with the given condition,

X = 17.4 cm cos(5.46t)

A = 17.4 cm

ω = 5.46 rad/s

T = 1 s

Hence, the angular frequency of this motion is 5.46 rad/s.

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Answer:

flow

Explanation:

the conductor allowed for the flow of electrons due to composition most conductors are mainly metal

Answer:

4.3333333

Explanation:

total distance / total time taken

30 + 2 + 20 / 3 + 4 + 5

52 / 12

4.3 recurring

Alcohol abuse can lead to various health risks including brain damage, heart diseases, stroke etc. But studies yet not proved any connection of alcohol use with lung cancer.

Alcohols are organic compounds with OH groups. They are used in beverages as sprits which causes, neurodegeneration and nerve injury. The use of alcohol and further adverse affects is called alcohol abuse.

Alcohol abuse leads to severe damages to almost all parts of the body from brain to digestive system. Alcoholic products interfere with the nerve functions and suppress the excitatory nerve pathway activity causing brain damage and strokes.

Alcohol abuse further causes high blood pressure and damage to the heart valves . However, is is not reported that alcoholic use cause lung cancer. It is mainly caused by smoking. Thus option a is correct.

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Explanation: a reduction in genetic diversity and discomfort for animals that have very exaggerated characteristics.

The correct statement about the ball 1 is the magnitude of buoyancy force is equal to that of ball's weight.

The upward force exerted on an object that is wholly or partially immersed in a fluid is called upthrust.

Ball 1 is floating on water.

Weight of the ball 1 is Fg = m₁g is acting vertically downward.

Force of buoyancy Fb = ρvg is acting vertically upwards

Net force acting on the ball is zero, Fg = Fb

As the ball 1 floats without sinking, it is in equilibrium.

This means that the net downward force is balanced by the net upward force.

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Wear protective gear, such as helmets, protective pads, and other gear.

Warm up and cool down.

Know the rules of the game.

Watch out for others.

Don't play when you're injured.

The total mechanical energy of the bicyclist is 1400 J, obtained by adding her potential energy of 720 J and kinetic energy of 680 J. The correct answer is option B.

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Answer:

\(a=-1.875\ m/s^2\)

Explanation:

Motion With Constant Acceleration

It occurs when the velocity of an object changes uniformly in time.

The equation that rules the change of velocities is:

\(v_f=v_o+at\)

Where:

a   = acceleration

vo = initial speed

vf  = final speed

t    = time

Solving for a:

\(\displaystyle a=\frac{v_f-v_o}{t}\)

The initial speed is vo=72 Km/h and it's reduced to vf=45 km/h in a time of t=4 s. Both speeds will be converted to m/s:

vo=72*1000/3600 = 20 m/s

vf=45*1000/3600 = 12.5 m/s

Now calculate the acceleration:

\(\displaystyle a=\frac{12.5-20}{4}=\frac{-7.5}{4}\)

\(\mathbf{a=-1.875\ m/s^2}\)

The decay constant of a radioactive sample can be determined by using the equation N = N0  ˣ e (e⁻λt) , and the half-life can be found using T1/2 = ln(2)/λ.

(a) To calculate the decay constant, we can use the formula N = N0  ˣ (e⁻λt), where N is the final count rate, N0 is the initial count rate, λ is the decay constant, and t is the time.

By substituting the given values, we can solve for λ. The half-life can be found using the formula T1/2 = ln(2)/λ.

(b) The age of the charcoal sample can be determined using the formula t = (ln(N0/N) ˣ T1/2) / ln(2), where N0 is the initial activity, N is the current activity, T1/2 is the half-life, and t is the age of the sample.

By substituting the given values, we can calculate the age of the charcoal sample.

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To keep the leg in the raised position, the tendon should provide 160N force.

The rotating force or moment of a force around a particular axis or pivot point is measured by torque. The tendency of a force to cause an object to spin along an axis is described as a vector quantity, torque.

Given: combined mass of the lower leg and the foot, m = 3.6kg

position of the center of gravity, r1 = 25cm

r = 0.25m

distance between tendon and lower leg, r2 = 5cm = 0.05m

torque applied will be τ = 3.6 × 10 × 0.25

τ = 8 N-m

the force applied by tendon

F = τ/ r2

F = 8/ 0.05

F = 160N

Therefore, To keep the leg in the raised position, the tendon should provide 160N force.

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Answer:

Density = 2.66 g/cm³

Explanation:

Density = Mass / Volume

Since, the units are same as of kg/m³

==> Density = 400 / 150

==> Density = 2.66

Density = 2.66 g/cm³

\(\\ \sf\longmapsto Density=\dfrac{Mass}{Volume}\)

\(\\ \sf\longmapsto Density=\dfrac{400}{150}\)

\(\\ \sf\longmapsto Density=2.6g/cm^3\)

Acceleration of the car is 6 m / s ².

a =  ( v - u ) / t

a stands for acceleration

u stands for initial velocity

v stands for final velocity

Given ,

u = 5 m / s

v = 20 m / s

t = 2.5 s

a =  ( v - u ) / t

a = ( 20 - 5 ) / 2.5

  =  15 / 2.5

 a  = 6 m / s ²

Hence , Acceleration of car is 6 m / s ² .

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The given question is incomplete kindly refer below for complete question :

A car accelerates from 5m/s to 20m/s in 2.5 seconds . Find the acceleration of the car .

Answer:

A: The mass would be 250kg

Explanation:

In terms of an equation, the momentum of an object is equal to the mass of the object times the velocity of the object. where m is the mass and v is the velocity. The equation illustrates that momentum is directly proportional to an object's mass and directly proportional to the object's velocity.

p= mv

m= p/ v

The explanation to that is:

momentum = mass× velocity

mass= momentum / velocity

THE ANSWER IS A

Hope this helps!

Answer:

An object is considered to be accelerating if the object is changing its rate in speed, decreases in speed, or changes the object's direction

99.1° Fahrenheit is Median Temperature of the Patient's Temperature who was recorded In degrees Fahrenheit every hour for 8 hours. Thus, option C is correct.

The middle number in a sorted, ascending or descending list of numbers is called the median, and it can be more descriptive of a data set than the average. It represents the midpoint of the data because it is the point above and below which 50% of the observed data falls.

Median = \($\mathrm{\frac{(n/2) term +(n/2 + 1) term }{2} }\)

Here, n/2 term is 8/2 = 4th term = 99.0°  (in ascending order)

n/2 + 1 term = 5th term = 99.2°  (in ascending order)

So,

Median = \($\mathrm{\frac{99.0^{\circ}+99.2^{\circ}}{2} }\)

Median = \($\mathrm{\frac{198.2^{\circ}}{2} }\)

Median = 99.1°

Thus, 99.1° Fahrenheit is Median Temperature of the Patient's Temperature who was recorded In degrees Fahrenheit every hour for 8 hours

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If the moon is highest in the sky in the morning at 6:00am, it means that it is in its waning phase. This is because the moon rises later and later each day during its waning phase, eventually reaching its highest point in the morning.

After one week, the moon will have gone through approximately half of its cycle and will be in its third quarter phase. This is when the moon appears as a half-circle in the sky, with the right half illuminated. During this phase, the moon rises around midnight and sets around noon, making it visible during the morning hours. As the moon continues to wane, it will appear smaller and smaller in the sky until it reaches its new moon phase, which marks the beginning of a new lunar cycle. Understanding the phases of the moon is important for astronomers and anyone who wants to track the moon's position and movements in the sky.

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