You place a coin on a rotating turntable. Describe a circular motion experiment to estimate the maximum coefficient of static friction between the coin and the turntable.

Answer:

B.d

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Answer:

D. b

Explanation:

the endpoint of vector b is at 3, which means the length is 3

In the first case, the momentum is 4,860,000Kgm/s while in the second case, the momentum is 4,550,000Kgm/s.

The term momentum of a body refers to the product of mass and velocity. It is a vector quantity.

In the first case;

momentum = 81,000Kg * 60m/s = 4,860,000Kgm/s

In the second case, we must find the resultant velocity V

V = √(25)^2 + (43)^2

V = 50 m/s

Hence;

Momentum = 91000Kg * 50 m/s

= 4,550,000Kgm/s

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When the mirror is moved so that the tree is between the focus point F and the mirror, the image appears shorter and on the same side of the mirror.This happens because of the phenomenon known as Reflection of Light. The mirror reflects light in such a way that it appears as if the light is coming from behind the mirror.

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The 95% confidence interval is wider than the 99% confidence interval. This is because a higher confidence level requires a larger margin of error to account for a greater level of certainty in the results.

In statistical analysis, a confidence interval is a range of values within which the true population parameter is estimated to lie. It provides a measure of the precision and uncertainty of the sample estimate. The width of a confidence interval is determined by the desired level of confidence and the margin of error.

A 95% confidence interval means that if the survey were repeated many times, 95% of the intervals would contain the true population proportion. On the other hand, a 99% confidence interval would contain the true population proportion in 99% of such surveys.

When constructing a confidence interval, a higher level of confidence requires a larger margin of error. This means that the interval will be wider to provide a broader range of potential values for the population parameter.

In this case, the 95% confidence interval has a margin of error of +4 percentage points, indicating that the estimate of 14% choosing chocolate pie could be off by up to 4%. On the other hand, the 99% confidence interval would have a smaller margin of error, resulting in a narrower range of possible values.

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Answer: 60

Explanation: if u hit it it will have impact and the impact added 10n

Answer:

Explanation:

The formula for kinetic energy  Ke=1/2mv^2 where Ke is kinetic energy, m=mass, and v= velocity.

If the kinetic energy is increased that means that there must be an increase in mass or velocity. However, since the velocity is squared that means that velocity affects the kinetic energy of the object more than the mass does.

For saving lives  the most important safety feature on a car is B. Safety Belt

Safety features of  a car is a feature of a product designed to ensure or increase safety.

Air bag and Anti-lock brakes are the supplemental protection and designed to work best with combination with seat bells.

Air bag reduce the chance that upper body or head will strike the vehicle's interior during a crash alongside with belt that will  also hold your upper body

so, the primary safety feature is seat belt and Air bag and Anti-lock brakes  comes in secondary safety feature  as they increases the safety and risk of getting an injury during any accident

correct answer is B. Safety Belt

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Answer:

combine them all

6 m

Explanation:

Answer:

0.50 s

Explanation:

Speed is a scalar quantity because it is only represented by magnitude not a direction.

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First of all,

We have,

➝ Angle of reflection = 35°

(a) According to law of reflection,

Angle of incidence = Angle of reflection

➝ Angle of incidence = 35°

(b) By using formula,

Angle of Deviation = 180° - 2(Angle of incidence)

From (a),

➝ Angle of Deviation = 180° - 2(35°)

➝ Angle of Deviation = 180° - 70°

➝ Angle of Deviation = 110°

(c) We know,

Angle of Incidence + Glance angle of incidence = 90°

Angle of reflection + Glance angle of reflection = 90°

So,

As angle of incidence = angle of reflection

Then, Angle of glance is also equal.

➝ Angle of glance = 90° - 35° = 55°

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Answer:

B.rate of convection

Explanation:

I suggest that the students move forward with option A.

Test funnels of the same size and material with varying sized openings. This will allow them to determine the optimal size for the opening that will help direct the marble to the launch pad. Once they have determined the optimal size, they can move forward with constructing the funnel with that size opening.

A force can NOT cause an object to become invisible.

option C is the correct answer.

According to Newton's second law of motion, the force applied to an object is directly proportional to the product of mass and acceleration of the object.

In other words, the force applied to an object is equal to the change in momentum of the object over time.

So we can say that force is a physical cause that can change an object's state of motion or dimensions.

So forces can cause the following;

However, a force cannot cause an object to become invisible.

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Your answer would be Device A.

Answer:

Device A because it would use more voltage :D

Explanation:

Answer:

Assess what information you are given. Use this method if you know:

the total distance covered by one person or vehicle; and

the total time it took that person or vehicle to cover the distance.

Explanation:

Hope this helps! I might be wrong, so tell me if I am

Answer:

Average speed can be calculated by dividing the total distance the object travels by the total amount of time it takes to travel that distance.

Explanation:

This is as much as I can help you, i don't know much else on how to do that ;w; sorry

The magnitude of dog's displacement vector in the due west direction is 0.65 km.

It is given that, a dog walks 0.64km due north.

It is also given that the magnitude of dog's total displacement is 0.91 km.

The magnitude of dog's displacement vector in the due west direction can be found by using Pythagoras theorem.

It is mathematically represented as, c² = a² + b²

Given, c = 0.91 km

a = 0.64 km

b =?

Making b as subject, we have,

b² = c² - a²

b = √(c² - a²) = √(0.91² - 0.64²) = 0.65 km

Thus, the magnitude of dog's displacement vector in the due west direction is 0.65 km.

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on a different planet I would play a sport similar to soccer. The main difference is that there is zero gravity. To win the game u have to get the ball into the other person's net first.

Explanation:

I was just bored

Answer:

From a sound standpoint, higher tracking force reduces all other things being equal which might reduce the top end a bit and increase bass.

Answer:

constant object, momentum increases directly with speed

Explanation:

whereas kinetic energy increases the square of the velocity due to energy momentum

Based on the given information, I agree with Ari's statement. Ari believes that the expanding gases in the cannon chamber give the cannonball speed, not force. This is because when the cannon is fired, the expanding gases push against the cannonball, propelling it forward. Once the cannonball leaves the barrel of the cannon, there is no longer a force acting on it.

Force is defined as a push or pull on an object, and in this case, it is provided by the expanding gases. Therefore, Leo's statement that the force remains with the cannonball, keeping it going, is incorrect. The force is only present while the cannonball is in the barrel and being propelled by the expanding gases. Once it leaves the cannon, the force is no more.

This is because when the cannon is fired, the expanding gases push against the cannonball, propelling it forward. Once the cannonball leaves the barrel of the cannon, there is no longer a force acting on it.

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Answer: Force required to 25 joule work when the force causes a displacement of 0.5m is 50N

Explanation: To calculate the work done we use the formula

W=F.s                               (1)

W= work done

F=  force applied               s= displacement

Given, work done W= 25 joules= 25 J

displacement s= 0.5m

∴From equation (1) we get the force required when work is done and displacement is given, that is

F\(=\frac{W}{s}\)                                (2)

∴Force required \(F=\frac{W}{s}= \frac{25J}{0.5m}=50N\)            

(1 J is the work done by a force of 1 N acting over a displacement of 1 m and so 1 J= 1 Nm⇒ 1 N = 1 J/m)

ANS: Force required to do 25 J work when a force causes displacement of 0.5m = 50 N

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While the temperature in St. Petersburg, FL (80°F) was indeed higher than in Boston (40°F), it would not be accurate to say that it was twice as hot in St. Petersburg.

Temperature is measured on a linear scale, so doubling the temperature value does not equate to twice the intensity of heat. The Fahrenheit scale is arbitrary and does not have a true zero point. Therefore, a difference of 40 degrees Fahrenheit does not imply a twofold difference in heat intensity.

It's important to understand that temperature is a measure of thermal energy, and comparing temperatures alone does not provide a direct indication of relative heat intensity or twice the level of heat.

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None of the options provided (a, b, c, or d) accurately describes the relationship between the accelerations of the two masses. Option D.

According to Newton's second law of motion, the acceleration of an object is directly proportional to the force applied to it and inversely proportional to its mass. The equation that represents this relationship is:

F = m * a

Where F is the force, m is the mass, and a is the acceleration.

If you push both the 4 kg and 10 kg masses with the same force, the equation can be written as:

F = 4 kg * a1 (for the 4 kg mass)

F = 10 kg * a2 (for the 10 kg mass)

Since the force is the same in both cases, we can equate the expressions for the forces:

4 kg * a1 = 10 kg * a2

To determine the relationship between the accelerations a1 and a2, we divide both sides of the equation by their respective masses:

a1 = (10 kg / 4 kg) * a2

Simplifying this expression:

a1 = 2.5 * a2

From this equation, we can conclude that the 10 kg mass accelerates 2.5 times slower than the 4 kg mass. Therefore, none of the options provided (a, b, c, or d) accurately describes the relationship between the accelerations of the two masses.

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Answer: 210 J

Explanation:

Since there is no friction, coefficient of friction, μ = 0

The free body diagram is shown below

There must be a downward force due to gravity. Thus,

Net force = applied force - downward force

From the diagram,

Downward force = mgSinθ

where

m is the mass of the crate

θ is the angle between the plane and the horizontal axis

g is the acceleration due to gravity

From the information given,

m = 3

applied force = 50N

θ = 30

g = 10 m/s^2

Net force = (50 - 3 x 9.81Sin30) = 35 N

Net work = net force x distance

Given that distance = 6m,

Net work = 35 x 6

Net work = 210 J