A box of mass 3 kg is lifted 1.5 m onto a shelf. Calculate the change in its gravitational potential energy. The gravitational field strength is 10 N/kg.

Answer:

Explanation:

The strength of the force of friction depends on two factors: how hard the surfaces push together and the types of surfaces involved. What factors affect the gravitational force between two objects? Two factors affect the gravitational attraction between objects: mass and distance.

The magnitude of the acceleration of the car is 5.76 m/s^2.

The acceleration of an object moving in a circle is given by the formula a = v^2/r, where v is the velocity of the object and r is the radius of the circle. In this case, the car is traveling at a velocity of 12 m/s and the radius of the cloverleaf is 50 m.

Therefore, a = (12 m/s)^2 / 50 m

= 2.88 m/s^2

However, this only represents the tangential acceleration of the car. Since the car is traveling in a circle, it also experiences centripetal acceleration toward the center of the circle. The centripetal acceleration can be calculated using the formula a = v^2/r.

So, a = (12 m/s)^2 / 50 m

= 2.88 m/s^2

The net acceleration of the car is the vector sum of the tangential and centripetal accelerations, which can be found using the Pythagorean theorem.

a net = √(a_tan^2 + a_cen^2)

= √(2.88^2 + 2.88^2)

= 5.76 m/s^2

The magnitude of the acceleration of the car on the circular cloverleaf is 5.76 m/s^2. This is made up of both tangential and centripetal accelerations, and it is important for drivers to understand how these forces affect their vehicle's motion and handling.

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Answer:The object has negative acceleration and eventually stops.

Explanation:

Answer:not sure

Explanation:

Sorry:(

Option (B) is the correct answer.

The net force on the bookshelf is 32.1 N.

The force produced by two surfaces coming into contact and sliding against one another is referred to as frictional force. The following variables impact the frictional force: The surface texture and the amount of force pressing them together have the most effects on these forces.

Frictional force = 2.9 N

Horizontal force applied on the bookshelf = 35 N

Net force = Horizontal force - frictional force

Net force = (35 - 2.9)  N = 32.1 N

Therefore, net force acting on the bookshelf is 32.1 N .

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Answer:

See image

Explanation:

Plato

Answer:

wave w is a sound wave

wave x and y are light waves

Answer:

D

Explanation:

During exercise, the major mechanism of heat loss is evaporation of sweat from the skin. Sweat evaporation is a thermoregulatory process that allows humans to maintain a relatively constant internal body temperature when engaging in exercise.

As a result of exercise, metabolic heat is generated. When the internal temperature rises, thermoreceptors in the hypothalamus are activated, causing sweat glands to be stimulated through sympathetic nerve fibers.The sweat produced then evaporates off the skin and removes the heat generated by exercise, thus cooling the body. However, sweat evaporation is only effective in removing heat if the ambient temperature is lower than the skin temperature. If the ambient temperature is higher than the skin temperature, then sweat cannot evaporate, and heat will not be removed from the body. Other mechanisms of heat loss, such as conduction, convection, and radiation, are less important than sweat evaporation during exercise.

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Answer: D. Increasing in randomness.

Explanation: The concept related to this change is entropy. Entropy is a measure of the randomness or disorder in a system. According to the second law of thermodynamics, the entropy of an isolated system tends to increase over time. This means that natural processes often lead to an increase in randomness or disorder.

For example, imagine a container of gas molecules. Initially, the molecules may be confined to one side of the container, creating a region of higher concentration. However, over time, the gas molecules will naturally spread out and become more evenly distributed throughout the container. This increase in randomness or disorder corresponds to an increase in entropy.

When a car travels around two curves, one with twice the radius of curvature of the other, the change of velocity of the car is greater in the curve with the smaller radius of curvature. This is because the square of the speed is directly proportional to the radius of the turn, and the centripetal force required to keep the car moving in a circle is greater in the curve with the smaller radius of curvature.

As the radius of the circle decreases, the centripetal force required to keep the car moving in a circle increases. Since the car is traveling the same distance at a constant speed around both curves, the velocity must change in the curve with the smaller radius of curvature in order to maintain the necessary centripetal force.

Therefore, the change of velocity of the car is greater in the curve with the smaller radius of curvature.

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Contact improvisation stems from the idea that each body is unique.

Body contact improvisation is a form of dance which incorporates elements from sporting movement and gymnastics, martial arts, and modern theatre practices.

Contact Improvisation liberate the dancer from the concern of the outward appearance of movement. Instead of giving importance to it’s outside visual aspect, this practice focuses in sensing a partner while having a body dialogue with her/him.

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The evidence that scientists have that Mars used to have a magnetic field is this:

B. The atmosphere of Mars contains evidence of a magnetosphere.

Scientists base whatever conclusions they reach on a subject matter on evidence. To reach their conclusion that mars had a magnetic field that protected it, they used a device known as an orbiter to measure the magnetic strength of mars.

Their discovery showed that the magnetic field on Mars was ten times as strong as the earth's field. This gives evidence of the fact that at a certain time, there was a strong magnetic field on Mars.

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According to the conservation of angular momentum, if an ice-skater starts spinning with her arms out wide, and then slowly pulls them close to her body, this will cause her to spin faster. The conservation of angular momentum states that the total angular momentum of a system remains constant as long as no external torque acts on it. This means that if a spinning object pulls its arms closer to its body, its rotational speed will increase.

This is because the moment of inertia of the system is reduced as the mass is brought closer to the axis of rotation. Since the angular momentum of the system must remain constant, an increase in rotational speed must occur to compensate for the decrease in moment of inertia. The principle of conservation of angular momentum can be observed in many physical systems, such as figure skating, where an ice skater spinning with her arms extended can increase her rotational speed by pulling her arms closer to her body. This is because the total angular momentum of the skater is conserved, and the decrease in moment of inertia is compensated by an increase in rotational speed.

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Answer:

Soft serve ice cream

Explanation:

1g fat = 9 calories

take the fat numbers for each option and multiple by 9 and see who gives you 101

vanilla ice cream = 11.2 x 9 = 100.8 rounded to 101

frozen yogurt = 4 x 9 = 36

French fries = 24.7 x 9 = 222.3

pretzels = 1 x 9 = 9

Answer:

a = 5m/s^2

Explanation:

Vi=0 m/s

ΔY=10m

Δt=2s

find acceleration

With the givens and the acceleration being the only one missing, we can safely use the Δy = Vi Δt + 1/2 a (Δt)^2 formula

Plug it in and we get:

10 = 0 x 2 + 1/2 a (2)^2

10 = a2

10/2 = a 2/2

a = 5 m/s^2

I hope this helps :)

Answer:

A.) Hot to cold.

Explanation:

I took the quiz on Edge, 2022.

(See the attachment below.)

Hope this helped! <3

Based on scientific information, the direction that heat generally flow from is: A. hot to cold.

Heat is also known as thermal energy and it refers to a form of energy that is only transferred from an object to another due to a difference in temperature.

During the process of heat conduction, heat would only be transferred between objects that are having different levels of temperature and objects that are directly in contact with one another.

In conclusion, heat is generally transferred from a hot object to a cold object as a result of their varying temperature.

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Answer:

helium, hydrogen, nitrogen, oxygen,iron,uranium,

Explanation:

there are 118 elements but here are some

Answer:

Feeling's.

Explanation:

Nobody can measure the feeling of a person or love , etc

The answer is 86.4 degrees north of east. To arrive at the destination, the plane must fly in a direction that is a combination of its air speed and the wind direction.

Let's call the direction the plane must fly "x" degrees north of east. The plane's ground speed is the vector sum of its air speed and the wind speed. Since the wind is blowing due west and the plane is flying directly north, the wind will have no effect on the plane's northward speed. However, the wind will reduce the plane's eastward speed.

Using trigonometry, we can find that the plane's ground speed is approximately 424.3 km/hr. Since the plane needs to travel 500 km, it will take approximately 1.178 hours to reach its destination.

During that time, the wind will have pushed the plane 11.78 km to the west. We can use trigonometry again to find that the angle whose tangent is 11.78/500 is approximately 1.34 degrees.

Therefore, the plane must fly in a direction that is 90 degrees minus 1.34 degrees, or 88.66 degrees, north of east. Rounding to one decimal place, the answer is 86.4 degrees north of east.

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Answer:

\(a=0.45\ m/s^2\)

Explanation:

Given that,

The radius of a bend, r = 20 m

Velocity of motorcyclist, v = 3 m/s

The combined mass of motorcyclist and the motorcycle is 50 kg

We need to find the motorcyclist’s centripetal acceleration. The formula used to find the centripetal acceleration is given by :

\(a=\dfrac{v^2}{r}\\\\a=\dfrac{(3)^2}{20}\\\\a=0.45\ m/s^2\)

So, the acceleration of the motorcyclist is \(0.45\ m/s^2\).

Answer:

Destructive interference

Explanation:

At a node, there is complete destructive interference at all times, so the displacement is zero. Why does a node in a standing wave have zero displacement? As the siren moves away, each wave front produced by the siren is farther from the previous wave front than if the siren were standing still.

A node in a standing wave has zero displacement because it is the point where two waves traveling in opposite directions cancel each other out, resulting in destructive interference and no movement of particles from their equilibrium position.

In a standing wave, nodes are points that do not experience any displacement. This occurs due to the interference of two waves traveling in opposite directions. When two waves with the same amplitude and frequency pass through each other, they create a standing wave pattern.

The nodes are the points where the two waves cancel each other out, resulting in zero displacement. At these points, the crest of one wave coincides with the trough of the other wave, causing destructive interference. As a result, the particles at the nodes do not move from their equilibrium position and remain at zero displacement.

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Answer:

Whenever energy gets transformed, the total

energy remains unchanged. This is the law of

conservation of energy. According to this law,

energy can only be converted from one form

to another; it can neither be created nor

destroyed. The total energy before and after

the transformation remains the same.

Answer:

The students displacement is 3·√3 blocks, 45° North of West

Explanation:

From the question, we have;

The distance North in which the student walks = 3.0 blocks

The next walking distance West by the student = 3.0 blocks

The displacement of the student = The shortest distance between the student start and final point

By representing the motion of the student in vector format, we have;

\(\mathbf{d} = 3\cdot \hat{i} + 3\cdot \hat{{j}}\)

Therefore the magnitude of d is given as follows;

\(\left | d\right | = \sqrt{3^2 + 3^2} = 3\cdot \sqrt{3} \ blocks\)

The direction of the student = tan⁻¹(3/3) = 45° West of North

The students displacement = 3·√3 blocks, 45° North of West.

Answer:

(a) t = 1.67 s

(b) s₂ = 45 m

Explanation:

Here, we use the formula:

s = vt

FOR Seth:

s₁ = v₁t₁

where,

s₁ = distance covered by Seth

v₁ = speed of Seth = 9 m/s

t₁ = time taken by Seth

FOR Mack:

s₂ = v₂t₂

where,

s₂ = distance covered by Mack

v₂ = speed of Mack = 27 m/s

t₂ = time taken by Mack

since, initially Mack is 30 m behind Seth. Therefore,

(a)

s₂ = s₁ + 30 m

using formulae:

v₂t₂ = v₁t₁ + 30 m

but, the time of catching is same for both (t₁ = t₂ = t)

v₂t = v₁t + 30 m

using values:

(27 m/s)t - (9 m/s)t = 30 m

t = (30 m)/(18 m/s)

t = 1.67 s

(b)

s₂ = v₂t

using values:

s₂ = (27 m/s)(1.67 s)

s₂ = 45 m

So, the linear velocity of a point on the edge of the disk is 24.12 m/s.

To determine the linear velocity v of a point on the edge of the disk, we can use the equation:
\(v = r * omega\)where r is radius of the disk and omega is angular velocity.

Substituting:

v = 3.6 m x 6.7 rad/s
v = 24.12 m/s

Therefore, the linear velocity of a point on the edge of the disk is 24.12 m/s.
Hi! I'd be happy to help you with this question. We'll use the given rotational inertia, radius, and angular velocity to determine the linear velocity of a point on the edge of the disk.

Step 1: Identify the formula that relates linear velocity, radius, and angular velocity. The formula is:
\(v = r * ω\)

where v: linear velocity, r: radius, and ω: angular velocity.

Step 2: Substitute values
v = (3.6 m) * (6.7 rad/s)

Step 3: Calculate the linear velocity.

v = 24.12 m/s

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Answer:the answer is A and B

Explanation:

Option A and B are two reasons why digital signals are more dependable than analog signals for copying sound recordings. Options A and B are correct.

A digital signal is one in which data is represented as a series of discrete numbers.

To reduce the influence of noise in communication, a digital signal is utilized. When compared to analog signals, digital signals convey more information per unit time.

The digital signal has a higher quality throughout long distance transmission. The use of bandwidth is reduced when digital signals are sent.

The two reasons the digital signal is a more reliable way to copy sound recordings than the analog signal are;

A. The digital signal uses a limited number of values.

B. The digital signal is less affected by noise.

Hence,options A and B are correct.

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The formula that gives the kinetic energy of an object rolling smoothly over a floor is KE = 1/2 mv², where KE is kinetic energy, m is mass, and v is velocity.

When an object is rolling smoothly over a surface, it has both translational and rotational motion. The translational motion is the movement of the object as a whole in a straight line. The rotational motion is the spinning of the object about its center of mass.

To calculate the kinetic energy of an object that is rolling smoothly over a surface, we need to take into account both the translational and rotational kinetic energy.The total kinetic energy of a rolling object is the sum of its translational kinetic energy and rotational kinetic energy. The translational kinetic energy is given by

KEt = 1/2 mv², where m is the mass of the object and v is its velocity.

The rotational kinetic energy is given by

KEr = 1/2 Iω², where I is the moment of inertia of the object and ω is its angular velocity.

To calculate the moment of inertia of a rolling object, we need to know its shape and mass distribution. For a solid sphere, the moment of inertia is given by I = 2/5 mr², where r is the radius of the sphere.

For a hollow sphere, the moment of inertia is given by I = 2/3 mr².

To calculate the total kinetic energy of a rolling object, we simply add the translational and rotational kinetic energy:

KE = KEt + KEr= 1/2 mv² + 1/2 Iω²

The kinetic energy of an object rolling smoothly over a floor can be calculated using the formula KE = 1/2 mv². To calculate the total kinetic energy of a rolling object, we need to take into account both the translational and rotational kinetic energy.

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Answer:

the answer to the first one is B and the second one is c I hope I got them right

To determine the friction coefficient between the tire and the pavement, we need to use the equation for friction. Therefore, the correct answer is option B: 0.16.

a) The force produced between surfaces that slide against one another is referred to as the frictional force. b) Since frictional force develops when two surfaces come into contact with one another, it is referred to be a contact force. Walking on the road is an illustration of frictional force.

Friction force = friction coefficient x normal force

where the normal force is the force perpendicular to the surface, which in this case is the weight of the tire (50.0 lb). The friction force is the force required to drag the tire through the parking lot, which is 8.0 lb.

Substituting the given values, we get:

8.0 lb = friction coefficient x 50.0 lb

Solving for the friction coefficient, we get:

friction coefficient = 8.0 lb / 50.0 lb = 0.16

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Answer:

B. Extrusive igneous

Explanation:

Its B