Alex is conducting an experiment to find the specific heat capacity of water. She finds that 90 kJ were needed to raise the temperature of 350 g of water from 25°C to 75°C. What equation should she use to calculate the specific heat capacity?

(a) The magnitude of each of her forces of push against the two columns of rock is: 549.6 N.
(b)The fraction of her weight is supported by the frictional force on her shoes is: 1.12.

Given data
Mass of the rock climber = m = 50 kg
Coefficient of static friction between shoes and rock = μ₁ = 1.12
Coefficient of static friction between her back and the rock = μ₂ = 0.767

(a) To find the magnitude of each of her forces of push against the two columns of rock:

Force of push against the left column of rock = F₁
Force of push against the right column of rock = F₂

The maximum frictional force that can be exerted is given by,
Maximum frictional force = μmg
where,
μ = coefficient of static friction
m = mass of the object
g = acceleration due to gravity

In this problem, the object is a rock climber. Therefore, the maximum frictional force that can be exerted is given by,
F₁ = μ₁mg
F₂ = μ₂mg

where,
m = 50 kg
g = 9.8 m/s²

Now, substituting the values in the above equation, we get

F₁ = μ₁mg = 1.12 × 50 × 9.8 = 549.6 N
F₂ = μ₂mg = 0.767 × 50 × 9.8 = 376.93 N

Therefore, the magnitude of the force of push against the left column of rock is 549.6 N and that of the force of push against the right column of rock is 376.93 N.

(b) To find what fraction of her weight is supported by the frictional force on her shoes:

The weight of the rock climber is given by,

W = mg

where,

m = 50 kg

g = 9.8 m/s²

Now, substituting the values in the above equation, we get

W = mg = 50 × 9.8 = 490 N

The frictional force that is supported by her shoes is given by,

Fs = μ₁mg

where,

μ₁ = coefficient of static friction

m = mass of the object

g = acceleration due to gravity

In this problem, the object is a rock climber. Therefore, the maximum frictional force that can be exerted is given by,

Fs = μ₁mg = 1.12 × 50 × 9.8 = 549.6 N

Therefore, the fraction of her weight that is supported by the frictional force on her shoes is,

Fraction = Fs/W = 549.6/490 = 1.12

Therefore, the fraction of her weight that is supported by the frictional force on her shoes is 1.12.

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A speaker should employ the spatial pattern of organisation to describe the physical arrangement  of a location, an item, or an event.

Physical arrangement describes how things are laid out or organised spatially in the physical world. It can be used to describe the placement, tilt, and connections of various elements inside a given space. In a variety of professions, including architecture, urban planning, and interior design, it is crucial to comprehend how things are physically set up. A biological organism's physical structure or the arrangement of the planets in the solar system are two examples of how it might be useful in understanding or interpreting natural occurrences. In public speaking, the spatial pattern of arrangement can be used to describe the physical arrangement of a location, an item, or an event in order to aid the audience in visualising and comprehending it.

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Acceleration is -7 m/s²

Explanation:

initial velocity (u) = 14 m/s

since it's gonna stop,

final velocity (v) = 0m/s

time taken(t) = 2 seconds

now,

a = (v-u)/t

or, a = (0-14)/2

or, a = -14/2

a = -7m/s²

Answer:

Yes, a mixture can be made up of just elements and no compounds. The elements never experiance a chemical interaction and stay only in physical contact with each other.

BRAILIEST PLS I NEED LEVEL UP!

To rank the volumes of water from greatest to least for the same mass at different temperatures, we need to consider the relationship between temperature and water's density.

As the temperature changes, water undergoes thermal expansion or contraction, resulting in varying densities. Generally, water expands as it is heated and contracts as it is cooled.

1. **100°C (boiling point)**: At its boiling point, water has the greatest volume for the same mass due to the highest temperature and thermal expansion.

2. **25°C (room temperature)**: At room temperature, water has a slightly smaller volume compared to its boiling point but is still larger than the volumes at lower temperatures.

3. **4°C (maximum density)**: Water reaches its maximum density at approximately 4°C. At this temperature, water has a slightly smaller volume than at room temperature but greater than at colder temperatures.

4. **0°C (freezing point)**: As water approaches its freezing point, it starts to contract and its volume decreases. At 0°C, water has a smaller volume compared to the previous temperatures.

5. **-20°C (sub-zero temperature)**: At sub-zero temperatures, water contracts further due to increased cooling. As a result, the volume of water at -20°C is the smallest among the listed temperatures for the same mass.

Remember that this ranking is specific to water and assumes standard atmospheric pressure.

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Answer:

Each body spray cost $ 21.25

Explanation:

The electric field produced by the disk at point P along the x-axis is approximately 333.89 N/C.

Since the disk lies in the y-z plane, the electric field produced by the disk will only have an x-component, which can be calculated using the formula for the electric field produced by a charged disk:

E = σ / (2ε₀) * [1 - (z / √(R² + z²))]

At point P(1.01 m, 0.00 m), the distance from the disk along the z-axis is z = 0, so the formula reduces to:

E = σ / (2ε₀) = (5.88 × 10^-6 C/m²) / (2 * 8.85 × 10^-12 F/m) ≈ 333.89 N/C

Therefore, the electric field produced by the disk is 333.89 N/C.

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a. Change amplitude by adjusting shaking intensity

b. Change frequency by adjusting shaking speed

c. Manual waves

d. Adjust amplitude slider on simulation tool

e. Adjust the frequency slider on the simulation tool

a. The amplitude of a wave is the height or depth of the wave. You can change the amplitude of the wave by adjusting how much you shake the rope, blanket, or Slinky. If you shake it harder, the waves will have a larger amplitude. If you shake it gently, the waves will have a smaller amplitude.

b. The frequency of a wave is how often the waves occur per second. You can change the frequency of the wave by adjusting how quickly you shake the rope, blanket, or Slinky. If you shake it quickly, the waves will have a higher frequency. If you shake it slowly, the waves will have a lower frequency.

c. Based on the description given, the waves created are more like manual waves, which means they are created by a physical movement rather than a machine or electronic device.

d. To simulate changing the amplitude of the wave, you can adjust the amplitude slider on the simulation tool. You can start by setting the amplitude to a low value and then gradually increasing it to a higher value. Here is an image to illustrate the experiment:

[Insert image of simulation tool with amplitude slider adjusted from low to high]

e. To simulate changing the frequency of the wave, you can adjust the frequency slider on the simulation tool. You can start by setting the frequency to a low value and then gradually increasing it to a higher value. Here is an image to illustrate the experiment:

[Insert image of simulation tool with frequency slider adjusted from low to high]

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Answer:

Downwards

Explanation:

Using Fleming's right hand rule, where the middle finger represents the negative charge moving in the south to north direction, the fore finger represents the magnetic field which points in the east to west direction.

If we are to follow this orientation and place the thumb, middle finger and fore-finger at right angles to each other, the thumb represents the direction of the magnetic force on the charge.

In this case, the magnetic force points downwards after setting the other orientations of the magnetic field and the negative charge's direction.

Its magnetic axis does not lie in the same direction as its rotation axis. Uranus is the seventh planet from the Sun and the third largest planet in our solar system. Option e is Correct.

It is unique in several ways that distinguish it from every other planet in our solar system. One of these characteristics is that its magnetic axis is tilted almost 90 degrees to the plane of its orbit. The magnetic axis of a planet is the direction in which its magnetic field is pointed. The magnetic axis of a planet is usually aligned with its rotation axis, but this is not the case for Uranus. In fact, Uranus's magnetic axis is tilted by about 59 degrees relative to its orbit, which is much more than any other planet in our solar system.

In contrast, the other characteristics listed in the options are not unique to Uranus. Every planet in our solar system has its own set of moons, and the composition of their atmospheres varies. The orbits of the planets are also tilted with respect to the Sun, and some of them have magnetic fields that are tilted with respect to their rotation axes. However, the tilt of Uranus's magnetic axis is the most extreme of any planet in our solar system.  

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When electrons are lost a positive ion is formed. When electrons are gained, a negative ion is formed. I hope this helps

Answer:

4km/m

Explanation:

She was going at 2km/m, so 2 kilometers per minute. She has 2 minutes therefore she needs to double her rate to 4 kilometers per minute.

The frequency at which the square object will swing back and forth is given by √(g / (4\(\pi ^{2}\) * L)), where g is the acceleration due to gravity.

To determine the frequency at which the square object will swing back and forth, we can use the formula for the period of a simple pendulum. The period (T) is the time taken for one complete oscillation.

For a simple pendulum, the period can be given by the formula:

T = 2π * √(L/g)

Where:

T = period

L = length of the pendulum (distance from the pivot to the center of mass)

g = acceleration due to gravity

In this case, the length of the pendulum is the distance from the pivot to the center of mass of the square object. Since the object is hung at its upper corner, the distance from the pivot to the center of mass is (L/2).

Therefore, the period of the square object can be expressed as:

T = 2π * √((L/2)/g)

T = 2π * √(L/2g)

To find the frequency (f), we can take the reciprocal of the period:

f = 1/T

f = 1 / (2π * √(L/2g))

f = √(g / (4\(\pi ^{2}\) * L))

So, the frequency at which the square object will swing back and forth is given by √(g / (4\(\pi ^{2}\) * L)), where g is the acceleration due to gravity.

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Answer:

Wright Brothers

Explanation:

The Wright brothers – Orville and Wilbur – were two American aviation pioneers generally credited with inventing, building, and flying the world's first successful motor-operated airplane.

Answer:

a. i His weight and the normal force on him due to the ground

ii The weight and the normal force are balance

b. There are four forces acting on him while he is walking. These are the backward push due to his leg on the ground and the frictional force between his feet in the horizontal direction and, his weight and normal force on his feet in the vertical direction.

Explanation:

a. i Describe the forces that are acting on a person who is standing still on a sidewalk

His weight and the normal force on him due to the ground act on him while the person is standing on the sidewalk

ii. identify whether the forces are balanced or unbalanced.

The weight and the normal force are balance because, the person does not move in the vertical or horizontal direction.

b. Describe how the forces would change if the person started walking.

When the person starts walking, the backward push due to his leg on the ground and the frictional force between his feet and the ground now acts on him in the horizontal direction. The frictional force acts in the forward direction and tends to move him forward. His weight and normal force on his feet still act vertically and are both balanced since he does not move in the vertical direction.

So, there are four forces acting on him while he is walking. These are the backward push due to his leg on the ground and the frictional force between his feet in the horizontal direction and, his weight and normal force on his feet in the vertical direction.

The focal length of the objective lens is 1.36 cm

The length of the barrel, L = 15.5 cm Distance of the specimen from the objective,

p = 1.00 cm

Focal length of the eyepiece, fe = 5.11 cmLet the focal length of the objective be fo. Then, by the lens formula:

1/f = 1/p + 1/q

where f = fo (for objective) or

fe (for eyepiece)p = 1.00 cm (distance of specimen from objective) and q is the image distance in the case of the objective lens and the object distance in the case of the eyepiece lens. For the eyepiece, the image distance is infinity since the final image is formed at infinity.

Thus, the lens formula for the objective is:1/fo = 1/p + 1/q

where q = L − p (since the image of the object is formed by the objective and acts as an object for the eyepiece)Thus, 1/fo = 1/1.00 + 1/(15.5 − 1.00)

= 0.0677

Therefore, fo = 1/0.0677

= 14.77 cm

= 1.47 × 10^1 cm

Rounded off to two decimal places, the focal length of the objective lens is 1.36 cm.

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A car is traveling at a steady 77 km/h in a 50 km/h zone. A police motorcycle takes off at the instant the car passes it, accelerating at a steady 7.0 m/s2. The time elapses before the motorcycle is moving as fast as the car is (t)=183.3 Seconds.

The term velocity means that a object covers the amount of distance within the given time. That's called the velocity of the object. It can be measured in m/s and km/h.

To calculate the time, we are using the formula here is, v=u+at.

Here we are given,

V=  The final velocity of the car. = 77 km/h = 1283.3 m/s.

u= The initial velocity of the car.= 0 m/s

a =  The acceleration of the car = 7 m/s²

We have to calculate the time = t when it elapses before the motorcycle is moving as fast as the car.

Now we put the values in the known equation, we get

v=u+at.

Or, v=at

Or, t=v/a

Or, t= 1283.3/7

Or, t=183.3 Seconds.

From the above calculation we can conclude that, The time elapses before the motorcycle is moving as fast as the car is (t)=183.3 Seconds.

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A car is traveling at a steady 77 km/h in a 50 km/h zone. A police motorcycle takes off at the instant the car passes it, accelerating at a steady 7.0 m/s2. How much time elapses before the motorcycle is moving as fast as the car?

The stored elastic potential energy decreases.

When we compress a spring, we apply a force that compresses the coils of the spring closer together. This causes the spring to store elastic potential energy, which is the energy that the spring possesses due to its deformation. This potential energy is a form of mechanical energy that can be converted into other forms of energy, such as kinetic energy or thermal energy.

When the compressed spring is released, the stored elastic potential energy is converted into kinetic energy as the spring expands and the compressed coils of the spring move apart hence the store elastic potential energy decreases.

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Answer is D

Taking the test rn and found out the answer

The projectile D traveled the greatest horizontal distance.

Projectile motion is a form of motion experienced by an object or particle that is projected near the Earth's surface and moves along a curved path under the action of gravity only.

Horizontal range of a projectile is the horizontal distance travelled by the projectile between launch and the landing points.

The projectile horizontal distance is depend on horizontal speed and time in air.

In all these four projectile, projectile D has maximum horizontal speed and time in air.

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Answer:

The Sun derives all its energy from a fusion cycle. In that process, tiny hydrogen molecules combine into a continuous proton-proton chain to create larger helium nuclei. The above figure illustrates the fusion of hydrogen into helium.

Explanation:

Hope this helps.

Answer:

nuclear fusion

Explanation:

In this process, small hydrogen molecules fuse together to form bigger helium nuclei in a continuous proton-proton chain.

Answer:

5 km/hr due south

Explanation:

We need to subtract the two velocities due to the fact that they are in opposite directions (one due south and the other one due north). Then, for an observer located on earth, the goose will be flying at :

20 km/hr - 15 km/hr = 5 km/hr

Answer:

D i took the test

Explanation:

Answer:

The answer is D.

Explanation:

The other ones just don't make sense. AT ALLLLLL!!!!!!!!!!!!!!!!!!!!!!!

It takes Jupiter approximately 1 year to complete one orbit around the Sun. Therefore, it will take Jupiter approximately 1 year to return to the same position in the sky as viewed from Earth.

The time it takes for Jupiter to orbit the Sun (13 years) is known as its orbital period. However, from Earth's perspective, Jupiter's position in the sky is influenced not only by its orbital motion but also by Earth's own orbit around the Sun. Earth completes one orbit around the Sun in approximately 1 year, which means that it returns to the same position in its orbit. Therefore, for Jupiter to appear in the same position in the sky as viewed from Earth, it would take approximately 1 year, aligning with Earth's own orbit around the Sun.

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Answer:

45.9 kg

Explanation:

GPE = mgh

m = GPE / gh = (1800 J) / (9.8 m/s²)(4 m) = 45.9 kg

Answer:

3504.4 kgm/s

Explanation:

First, convert km/hr to m/s:

19 km/hr x 1000m/1km x 1/60min x 1/60s = 5.28 m/s

p = mv

p = (664 kg)(5.28 m/s) = 3504.4 kgm/s