a 1.7 m high marble ramp is set up on a 3 m high table. the marble leaves the ramp at the edge of the table with only horizontal velocity. what is the velocity of the marble as it leaves the ramp? 5.77 m/s 7.67 m/s 9.6 m/s 3.57 m/s

39°C=1.28L

8°C=? Less

=8°C/39°C×1.28L

=8/39×1.28L

=10.24/39

=512/195

=2.6L

Answer:  B

Explanation:  AN increase in heat out

If you lived on Saturn, the planets that would exhibit retrograde motion like that observed for Mars from Earth would be those planets that are farther from the Sun than Saturn. Specifically, Jupiter, Uranus, and Neptune would exhibit retrograde motion as seen from Saturn.

The reason for retrograde motion is an illusion caused by the differences in the orbital speeds and distances of the planets. As seen from Earth, Mars exhibits retrograde motion because Earth moves faster in its orbit than Mars. Similarly, from Saturn's perspective, the planets that are farther from the Sun would exhibit retrograde motion because Saturn moves faster in its orbit than these planets. On the other hand, the planets that would never be visible as crescent phases from Saturn would be Mercury and Venus. These two planets are located closer to the Sun than Saturn, so they always appear near the Sun in the sky from Saturn's perspective.

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Nothing prevents satellites such as the space shuttle from falling as they are continually falling as they orbit the Earth.

Hence the correct option is E) Nothing; they are continually falling as they orbit the Earth.

Satellites, like the space shuttle, are indeed in a constant state of free fall while they orbit the Earth. The force of gravity pulls them towards the planet, while their forward motion causes them to fall around the Earth instead of directly towards it. This delicate balance between gravity and the satellite's velocity allows it to maintain a stable orbit.

Centripetal force, which is the force that keeps an object moving in a circular path, plays a role in keeping the satellite in orbit. This force is equal to the gravitational force acting on the satellite. Centrifugal force, often considered as an "outward" force in a rotating system, is a fictitious force that arises due to the inertia of objects in a rotating reference frame.

The absence of air drag, while not directly responsible for preventing the satellite from falling, does help to maintain a satellite's orbit. With minimal air resistance in space, the satellite can maintain its velocity and stay in orbit without requiring constant propulsion.

In summary, satellites like the space shuttle are continually falling as they orbit the Earth, with the balance between gravity and their forward motion keeping them in a stable orbit.

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The 3 Ways to cooping with work related stress is to adopt healthy habits, seek social support, and engage in activities that promote relaxation.

The following are three ways to cope with work-related stress:

Exercise- Exercise is a simple yet effective way to reduce stress. When you exercise, your body releases endorphins that are natural mood boosters. Exercise helps to reduce the level of cortisol, which is a stress hormone. The best exercises to do when stressed include yoga, aerobics, walking, jogging, cycling, or dancing.

Engage in relaxation activities-  Engaging in relaxation activities such as meditation, deep breathing, or progressive muscle relaxation helps to relax your mind and body. Deep breathing helps to reduce muscle tension, lower blood pressure and reduce the level of cortisol in the body. Progressive muscle relaxation involves tensing and relaxing muscle groups in the body, one at a time. This technique helps to reduce muscle tension and improve relaxation.

Social support- Social support from family, friends, or colleagues can be a great way to cope with work-related stress. Talking to someone about your problems can help you to gain a different perspective on your situation and feel less isolated. Talking to a colleague can also help to create a supportive work environment. It is essential to identify a trusted confidant who can listen and provide support when you are feeling overwhelmed.

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Answer:

Volume, \(V=696.55\ \mu m^3\)

Explanation:

Given that,

The diameter of a human cell is 11 μm

It is enclosed by a membrane that is 4,4 nm thick.

We need to find the volume of the cell. The cell is spherical in shape. The volume of a sphere is given by the formula as follows :

\(V=\dfrac{4}{3}\pi r^3\)

r is the radius of the sphere, r = 5.5 μm

So,

\(V=\dfrac{4}{3}\times 3.14\times (5.5)^3\\\\V=696.55\ \mu m^3\)

So, the volume of the cell is \(696.55\ \mu m^3\).

Answer:

300m

Explanation:

step one

given data

initial speed u= 15m/s

final speed v= 45m/s

time taken to attain final speed= 10seconds

Step two:

Let us first solve for the acceleration

a= Δv/t

a= 45-15/10

a=30/10

a= 3m/s

applying the equation of motion

\(v^2=u^2+2as\)

substituting our given data

\(45^2+15^2+2*3*s\\\\2025=225+6s\\\\\)

collect like terms

2025-225=6s

1800=6s

divide both sides by 6

s=1800/6

s=300m

It is diffraction

Explanation:

The opening is the aperture

Answer:

B

Explanation:

edge2021

Correct geological features associated with various plate boundaries include:

A convergent plate boundary is formed when two tectonic plates collide. Usually one of the converging plates moves under the other. This is a process known as subduction. Deep oceanic trenches are a frequent feature where tectonic plates are subducting and earthquakes are also common in subduction zones.

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The exchange of energy between two objects in thermal contact is always from conduction.

The conduction is the heat exchange between two objects due to the transfer of energy through physical contact of particles. The exchange is maintained in equilibrium when the temperatures of the objects are equalized.

Examples:

It is the energy that flows from a warmer object to a cooler object due to the motion of its particles that speed up and generated an increase of its temperature. There are three types of thermal energy transfer: conduction, convection and radiation.

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Now, we are going to find the Thevenin equivalent impedance, Zth:First, we will short the voltage source V to get the short-circuit current. So, the circuit becomes:

[ad_1]

Therefore, the current through 10 Ω resistor is:

[ad_1]

Now, we will open the current source I to find the open-circuit voltage, Vth. So, the circuit becomes:

[ad_1]

Now, the voltage across 10 Ω resistor is:

[ad_1]

Therefore, the Thevenin equivalent circuit of the given circuit is as follows:

[ad_1]

Where,

Thevenin equivalent impedance, Zth = 10 + 40 = 50 ΩThevenin equivalent voltage, Vth = 100 V (as we have found it above).Therefore, the Thevenin equivalent circuit is:

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Answer:

Plural cerebrums cerebra The largest part of the vertebrate brain, filling most of the skull and consisting of two cerebral hemispheres divided by a deep groove and joined by the corpus callosum, a transverse band of nerve fibers. The cerebrum processes complex sensory information and controls voluntary muscle activity.

Explanation:

An ideal battery is a source of fixed EMF and voltage. An ideal battery is a theoretical construct that is used to understand how batteries work. It is a model that assumes that a battery has no internal resistance and that its voltage does not change with time.

In this idealized scenario, a battery is a source of fixed electromotive force (EMF) and voltage. The EMF is a measure of the battery's ability to produce electrical energy, while the voltage is the measure of the potential difference between the two terminals of the battery. In an ideal battery, the voltage is constant and does not depend on the amount of current that is drawn from it. This means that an ideal battery can deliver a constant amount of energy over an extended period of time.

While an ideal battery is not a real device, it is a useful tool for understanding the behavior of real batteries. In real batteries, there is always some internal resistance that causes the voltage to drop as current is drawn from the battery. This means that the actual voltage of a battery depends on the amount of current that is being drawn from it. Moreover, the voltage of a real battery decreases over time as the battery discharges. Nevertheless, the concept of an ideal battery is helpful in understanding the principles of battery operation and in designing practical battery systems that can deliver reliable and consistent performance.

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Answer:

is called matter :)

Explanation:

If a runner's velocity is -10 m/s, it means that the runner is moving in the opposite direction of the positive reference point. In this case, her direction of travel can be said to be negative or moving in the opposite direction from the positive reference point.

Based on the given information, it can be said that the runner is moving in a negative direction. The negative sign indicates that the velocity is in the opposite direction of the positive direction, which is usually the assumed direction of travel. In this case, the runner is moving in the opposite direction of the assumed direction, which is toward the starting point or the initial position.

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The roller skate has greater momentum than the heavy truck at rest. Momentum is equal to mass times velocity, and since the roller skate is in motion, it has a non-zero velocity. The heavy truck at rest has zero velocity, so its momentum is also zero. The correct option is C.

Momentum is a physical quantity that describes the motion of an object. It is defined as the product of an object's mass and its velocity. In other words, momentum is a measure of how hard it is to stop an object from moving. The greater an object's momentum, the harder it is to stop. Momentum is conserved in a closed system, meaning that the total momentum of all objects in the system remains constant.

To determine which object has greater momentum, we need to calculate the momentum of both the heavy truck at rest and the moving roller skate. The heavy truck has a large mass, but its velocity is zero since it is at rest. Therefore, its momentum is also zero. The roller skate, on the other hand, has a smaller mass but is in motion. Even though its velocity may be relatively low compared to the speed of the truck, it still has a non-zero value. As a result, the roller skate has a greater momentum than the heavy truck.

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Answer:

2500N.

Explanation:

SEE THE IMAGE FOR SOLUTION

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Explanation:

Force = mass × acceleration

Mass = 900kg

Acceleration = velocity ÷ time

Velocity = 60km/hr = 60 × 1000 ÷ 3600

Velocity = 60000 ÷ 3600

Velocity = 16.67m/s

To get the time

Velocity = Distance ÷ time

16.67 = 50 ÷ time

Cross multiply

16.67 × time = 50

time = 50 ÷ 16.67

time = 3 seconds

Acceleration = 16.67 ÷ 3

Acceleration = 5.56m/s²

Therefore, Force = 900 × 5.56

Force = 5004 Newton

Place theory argues that sounds of different frequencies induce vibration in different areas of the basilar membrane within the cochlea of the inner ear.

According to this theory, the specific location of these vibrations allows the brain to identify and interpret the frequency of a sound. High-frequency sounds cause the basilar membrane to vibrate near the base, closest to the oval window, while low-frequency sounds cause vibrations near the apex, or the end farthest from the oval window. The hair cells lining the basilar membrane are responsible for translating these vibrations into neural signals, which are then sent to the auditory nerve and eventually to the auditory cortex of the brain for processing.

The arrangement of hair cells along the basilar membrane creates a tonotopic map, meaning that each area is tuned to respond to specific frequencies, this spatial arrangement allows the brain to determine the pitch of a sound based on the location of the activated hair cells. In summary, place theory posits that the perception of different sound frequencies is determined by the specific location of vibrations along the basilar membrane. The tonotopic organization of hair cells helps the brain accurately identify and interpret various frequencies by detecting the origin of these vibrations.

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Explanation:

centripetal force is a force that makes a body follow a curved path. for example, twirling,a lasso, cream seperator etc.

A force that causes an objectmoving in a circular path to move out and away from the centres of it's path is centrifugal force. for example,drifting, banked roads, washing machine etc.

Circular motion is a movement of an object along the circumference of a circle or rotation along a circular path. for example, stirring batter, stone tied to a string etc

hope its helpfull♡

Answer:

An inelastic collision is a collision in which there is a loss of kinetic energy. While momentum of the system is conserved in an inelastic collision, kinetic energy is not.

Answer:

The DART mission proved to be successful. Its ultimate goal was to alter the trajectory of the asteroid Dimorphous. It was successful because the asteroid's trajectory was in fact altered. This mission is the first mission that intentionally altered the trajectory of a non man made object in space.

Split F₁ into its horizontal and vertical components:

F₁ = F₁ cos(θ) i + F₁ sin(θ) j

(boldface = vector; regular font = magnitude)

By Newton's second law, if the object is in equilibrium, then

• the net horizontal force on the block is

∑ F = F₁ cos(θ) - F₃ = 0   →   F₁ cos(θ) = 70 N

• the net vertical force is

∑ F = F₁ sin(θ) + F₂ - W = 0   →   F₁ sin(θ) = 65 N

Recall that cos²(θ) + sin²(θ) = 1 for any θ, so we have

(F₁ cos(θ))² + (F₁ sin(θ))² = (70 N)² + (65 N)²

F₁² = 9125 N²

F₁ = √(9125 N²) ≈ 95.5 N

Answer:

Here's what I got:

Let's assume that N and E are + directions while S and W are - directions.

Wind is blowing from SW; thus, it is blowing towards NE (or at 45 deg N of E).

Dividing the wind's speed into components:y-component: +70.71 km/h; x-component: +70.71 km/h

Dividing the airplane's speed into components:y-component: -600 km/h; x-component: 0 km/h

Adding the components to get the resulting components:y-component: -529.29 km/h; x-component: +70.71

Using the Pythagorean Theorem to find the resulting speed:v^2 = y^2 + x^2 so v = 533.99 km/h

To find the angle of direction, use arctan (y/x):arctan (529.29/70.71) = 82.39 deg

ANSWER: velocity = 533.99 km/h at 82.39 deg S of E

Explanation:

The wave number of the given wave is 3.93 m⁻¹ and its wave speed is 7.12 m/s.

Part A:
The wave number, represented by the symbol k, is defined as the number of complete waves that exist in a unit length of the medium. It is calculated using the formula k = 2π/λ, where λ is the wavelength of the wave. Substituting the given values, we get:

k = 2π/1.60 = 3.93 m⁻¹

Therefore, the wave number of the given wave is 3.93 m⁻¹

Part B:
The wave speed, represented by the symbol v, is defined as the speed at which a wave propagates through a medium. It is calculated using the formula v = ω/k, where ω is the angular frequency of the wave. Substituting the given values, we get:

v = 28.0/3.93 = 7.12 m/s

Therefore, the wave speed of the given wave is 7.12 m/s.


In conclusion, the wave number of the given wave is 3.93 m⁻¹ and its wave speed is 7.12 m/s.

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The change in the insects' coloration over time can be explained by evolution of insect body coloration under changing climates.

In studies on colour variety, its evolutionary causes, and the mechanical underpinnings of such variation, insects have served as important models. Recent research suggests that insect colour is adapting to the rapid climatic change. However, because a variety of biotic and abiotic factors can interact and mediate colour change, it is still difficult to determine the causes of colour variation within populations and species, as well as across space and time. Here, we discuss some of the difficulties and most recent developments in this area.

We begin by outlining the main competing theories for how climatic conditions affect insect colour variation.

Second, we examine the evidence that insect colour is now evolving adaptively in response to climate change.

Following this, we address elements that may help or hinder colour evolution in reaction to climate change. Finally, we suggest avenues for future work and identify gaps in this area of study.

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