When does acceleration due to gravity equal 9.8 m/s downward?
Select one:
a. always
b. when an object has been dropped downward
c. when an object has been thrown upward
d. at the peak of a thrown object's flight

Answer:

a) acceleration

Explanation:

Acceleration is, by definition, the change of an object's velocity.

Answer:

The tensions in \(T_{BC}\) is approximately 4,934.2 lb and the tension in \(T_{BD}\) is approximately  6,035.7 lb

Explanation:

The given information are;

The angle formed by the two rope segments are;

The angle, Φ, formed by rope segment BC with the line AB extended to the center (midpoint) of the ship = 26.0°

The angle, θ, formed by rope segment BD with the line AB extended to the center (midpoint) of the ship = 21.0°

Therefore, we have;

The tension in rope segment BC = \(T_{BC}\)

The tension in rope segment BD = \(T_{BD}\)

The tension in rope segment AB = \(T_{AB}\) = Pulling force of tugboat = 1200 lb

By resolution of forces acting along the line A_F gives;

\(T_{BC}\) × cos(26.0°) + \(T_{BD}\) × cos(21.0°) = \(T_{AB}\) = 1200 lb

\(T_{BC}\) × cos(26.0°) + \(T_{BD}\) × cos(21.0°) = 1200 lb............(1)

Similarly, we have for equilibrium, the sum of the forces acting perpendicular to tow cable = 0, therefore, we have;

\(T_{BC}\) × sin(26.0°) + \(T_{BD}\) × sin(21.0°) = 0...........................(2)

Which gives;

\(T_{BC}\) × sin(26.0°) = - \(T_{BD}\) × sin(21.0°)

\(T_{BC}\) = - \(T_{BD}\) × sin(21.0°)/(sin(26.0°))  ≈ - \(T_{BD}\) × 0.8175

Substituting the value of, \(T_{BC}\), in equation (1), gives;

- \(T_{BD}\) × 0.8175 × cos(26.0°) + \(T_{BD}\) × cos(21.0°) = 1200 lb

- \(T_{BD}\) × 0.7348  + \(T_{BD}\) ×0.9336 = 1200 lb

\(T_{BD}\) ×0.1988 = 1200 lb

\(T_{BD}\) ≈ 1200 lb/0.1988 = 6,035.6938 lb

\(T_{BD}\) ≈ 6,035.6938 lb

\(T_{BC}\) ≈ - \(T_{BD}\) × 0.8175 = 6,035.6938 × 0.8175 = -4934.1733 lb

\(T_{BC}\) ≈ -4934.1733 lb

From which we have;

The tensions in \(T_{BC}\) ≈ -4934.2 lb and  \(T_{BD}\) ≈ 6,035.7 lb.

Answer:

e

Explanation:

Answer:

Explanation:

F = k * q * lambda * R * π * (1 - √2/2)

Substituting the given values of q, lambda, R, and k, we get:

F = (9 x 10^9 N*m^2/C^2) * (20 x 10^-9 C) * (1 x 10^-6 C/m) * (0.1 m) * π * (1 - √2/2)

F ≈ 8.58 x 10^-4 N

Therefore, the force of interaction between the half ring and the point charge is approximately 8.58 x 10^-4 N.

Hi there!

We can use the following equation:
\(\large\boxed{V = I R}\)

V = potential difference (? V)
I = Current (16A)
R = Resistance (192Ω)

Plug in the givens and solve:

\(F = 16 \times 192 = \boxed{3072 V}\)

The surface temperature of the stars whose infrared radiation have a wavelength of  2 µm is 1.45×10³ K.

Temperature is the measure of hotness or coldness of a thing or place.

To calculate the temperature of the stars, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the surface temperature of the stars is 1.45×10³ K.

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The near point of a human eye is about a distance of 25 cm.

The closest distance that an object may be viewed clearly without straining is known as the near point of the eye.

This distance (the shortest at which a distinct image may be seen) is 25 cm for a typical human eye.

The closest point within the accommodation range of the eye at which an object may be positioned while still forming a focused picture on the retina is also referred to as the near point.

In order to focus on an item at the average near point distance, a person with hyperopia must have a near point that is further away than the typical near point for someone of their age.

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True,

molecular gastronomy was created by two scientists from Oxford University. Molecular gastronomy is a sub-discipline of food science that investigates the physical and chemical transformations of ingredients during cooking. It was first established by physicist Nicholas Kurti and chemist Hervé This, both from Oxford University. The term "molecular gastronomy" was coined in 1988 during a workshop on the science of cooking, which aimed to bridge the gap between scientific research and culinary arts.

Molecular gastronomy explores various aspects of food, such as flavor, texture, and presentation, and combines scientific knowledge with culinary techniques. This innovative approach to cooking has led to the creation of many unique and modern dishes, often featuring unexpected combinations of ingredients and visually appealing presentations.
The objective of molecular gastronomy is not only to create innovative dishes but also to understand and improve traditional cooking methods. This has led to advancements in food technology, as well as a deeper understanding of the science behind cooking processes. As a result, molecular gastronomy has become a popular and influential trend in the culinary world, inspiring chefs and home cooks alike to experiment with new techniques and ingredients.

In summary, molecular gastronomy was created by two scientists from Oxford University, Nicholas Kurti and Hervé This. Their groundbreaking work has had a significant impact on the culinary world and has led to many exciting innovations in food preparation and presentation.

Answer:

a = 3.54 m/s²

direction = 48.1° north of east

Explanation:

Add up the x and y components of the two applied forces, then determine the resultant, R

∑Fx = cos25(0.40 N) + cos65(0.54 N) = 0.591 N

∑Fy = sin25(0.40 N) + sin65(0.54 N) = 0.6585 N

R = √0.59² + 0.6585² = 0.884 N = Fnet

Ф = tan⁻¹(0.6585/0.59) = 48.1° north of east

Fnet = ma

a = Fnet/m = 0.884 N / (0.25 kg) = 3.54 m/s²

Answer:

The answer is 0.042 Hz (rounded)

or 0.0417 Hz

Explanation:

Hope it helps

Answer:

The answer is 0.041Hz

Explanation:

The answer is 0.041Hz

I guess

Answer:

d = 0.479 m

Explanation:

Given that,

The distance light travels in  = 1.6 ns

The speed of light is \(2.998\times 10^8\ m/s\)

The speed of an object is given by distance traveled divided by time.

\(c=\dfrac{d}{t}\\\\d=ct\\\\d=2.998\times 10^8\times 1.6\times 10^{-9}\\\\=0.479\ m\)

Hence, the required distance is 0.479 m.

Answer:

\(v=0.8m/s\)

Explanation:

From the question we are told that

Distance \(d=1.5m/sm/s\)

Time  \(t_1=60s\)  

Time  \(t_2=90s\)  

Generally the  the equation for the distance traveled is mathematically given as

\(d=vt\)

\(d=1.5*90\)

\(d=138m\)

Generally equation for speed of side walk is mathematically given as

\(d=(v+u)t\)

\(v=\frac{d}{t}-u\)

\(v=\frac{138}{60}-1.5\)

\(v=0.8m/s\)

Answer:

The amplitude of a wave is a measure of the displacement of the wave from its rest position. The amplitude is shown on the graph below. Amplitude is generally calculated by looking on a graph of a wave and measuring the height of the wave from the resting position. The amplitude is a measure of the strength or intensity of the wave.

Explanation:

Hope this helps! <3

Answer:

≈159.15

Explanation:

So displacment is the fastest, or shortest way to get somewhere

Youd take your circumference (500) and find the diameter from that using the 2 formulas

C=2πr

d=2r

your answer would be ≈159.15

If im incorrect please correct me! Im only just relearning this stuff (im a freshman)

Diving seabirds need to account for the bending of light because water has a higher refractive index than air.

When light passes through the air-water interface, it slows down and changes direction, causing the image of an object to appear distorted. This phenomenon is known as refraction. For diving seabirds, the refraction of light can make it challenging to accurately locate their prey when diving, which is essential for their survival.

To account for the bending of light, diving seabirds have evolved specialized eyes that allow them to adjust their focus and perceive images differently than humans. These adaptations enable the birds to see through the distorted image caused by refraction and accurately locate their prey while diving. One adaptation that diving seabirds have is a flattened cornea, which allows them to maintain a sharp focus while diving.

Overall, the ability of diving seabirds to account for the bending of light is essential for their survival, as it enables them to accurately locate and catch their prey while diving in the often murky and challenging conditions of the ocean.

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The magnitude of the electric field between the plates, from least to greatest is shown by option C.

We know that when two plates that are conducting are arranged in such a way that a gap is left in between them, the we have a capacitor. The electric potential of the capacitor would have a lot to do with the distance of the separation of the plates.

As such, the closer the plates are together, the greater the electric potential of the plates and the more the plates are apart, the lesser the electric potential of the plates.

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Answer:

a)   \(\omega=9.10*10^{-4}rad/sec\)

b)   \(V=1.8217*10^{-3}\)

Explanation:

From the question we are told that:

Mass of woman \(M_w=55kg\)

Radius of merry go round \(r=2.0m\)

Rotational inertia \(i= 1250 kg-m2\)

Mass of rock \(M_r=350g \approx 0.350kg\)

Speed of rock \(V_r=2.0m/s\)

Tangent angle to the outer edge \(\theta=1\)

a)

Generally the equation for conservation of momentum is mathematically given by

\(M_r(ucos\theta)r=(I+M_wr^2)\omega\)

\(0.350(2.0cos1)(2.0)=(1250+(55)(2.0)^2)\omega\)

\(1.3998=1470\omega\\\omega=\frac{1.339}{1470}\)

\(\omega=9.10*10^{-4}rad/sec\)

b)

Generally the equation for linear speed V is mathematically given by

\(V=r\omega\\V=2.0*9.10*10^{-4}\)

\(V=1.8217*10^{-3}\)

Answer:

In my physics class, something that helps connect better with kids is keeping connected with them always make sure to ask if they understand what you're teaching if they are following because sometimes most kids are to afraid to admit that they are lost, another way to connect with kids is maybe posting surveys to be able to check in with each student especially during this hard times :)

Explanation:

1. start with fun activities.

2. Encourage single-tasking.

3. Designate a learning playing field.

Answer:

t = 7.3 s

Explanation:

First we consider accelerated motion and use first equation of motion:

Vf = Vi + at

where,

Vf = Final Velocity = ?

Vi = Initial Velocity = 0 m/s

a = acceleration = 12.5 m/s²

t = time for acceleration = 3.3 s

Therefore,

Vf = 0 m/s + (12.5 m/s²)(3.3 s)

Vf = 41.25 m/s

Now, we consider the decelerated motion and use first equation of motion again:

Vf = Final Velocity = 0 m/s (since, sled will finally stop)

Vi = Initial Velocity = Vf of accelerated motion = 41.25 m/s

a = deceleration = -5.65 m/s²

t = time taken to stop = ?

Therefore,

0 m/s = 41.25 m/s + (-5.65 m/s²)t

t = (41.25 m/s)/(5.65 m/s²)

t = 7.3 s

From the given options the best example of an ascribed status will be poor.  Hence, option 2 is the correct one.

In sociology, the term "ascribed status" refers to a human's social standing as it is either allocated to them at birth or implicitly assumed in later life. The position of status is one that a person neither chooses for themselves nor earns. Instead, the position is decided upon in accordance with cultural and societal norms and standards. No matter how hard you try or how much you want to, these slots are filled. These fixed social designators are independent of the favorable or unfavorable stereotypes associated with one's assigned statuses and stay unchanged throughout a person's life.

Every society engages in the process of classifying people into categories based on factors including gender, race, family history, and ethnicity. This process is cross-cultural.

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The value of the spring constant is 8704 N/m.

The spring constant (k) can be found using Hooke's law, which states that the force required to stretch or compress a spring is proportional to the distance it is stretched or compressed.

Mathematically, it can be expressed as:

F = -kx

where F is the force applied to the spring,

k is the spring constant, and

x is the distance the spring is stretched or compressed.

Since the force applied to the spring is equal to the weight of the book, we can write:

F = mg = -kx

where m is the mass of the book and

g is the acceleration due to gravity.

Substituting the given values, we get:

560 g * 9.8 m/s^2 = -k * 0.25 m

Dividing both sides by -0.25 m and solving for k,

we will get it as:

k = (560 g * 9.8 m/s^2) / 0.25 m

k= 8704 N/m

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Each of the five friends needs to pay £12 to cover the cost of their own meals and contribute towards the birthday person's meal. Using mean allows us to distribute the cost equally among the friends, ensuring a fair division of expenses for the meal.

To determine how much each of the five friends needs to pay, we can use the concept of averages (mean) and divide the total cost by the number of people paying.

In this scenario, the total cost of the meal for 6 people is £12 per person. Since the other 5 friends have decided to pay for the birthday person's meal, they will collectively cover the cost of their own meals plus the birthday person's meal.

To calculate the total cost covered by the five friends, we can subtract the cost of one person's meal (since the birthday person's meal is being paid by the group) from the total cost. The cost of one person's meal is £12.

Total cost covered by the five friends = Total cost - Cost of one person's meal

= (£12 x 6) - £12

= £72 - £12

= £60

Now, to find out how much each of the five friends needs to pay, we divide the total cost covered by the five friends (£60) by the number of friends (5).

Amount each friend needs to pay = Total cost covered by the five friends / Number of friends

= £60 / 5

= £12

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Two mirrors are inclined at an angle of 30 degrees a ray of light obliquely at 180.

A mirror is said to be inclined when it is positioned perpendicular to a surface or if a flat mirror is positioned at an angle from the base (other than 90 degrees).

We first need to comprehend light in order to comprehend mirrors. According to the rule of reflection, a light beam that strikes a surface will bounce back like a tennis ball bounced against a wall.

Always equal to the angle leaving the surface, or the angle of reflection, is the entering angle, also known as the angle of incidence.

Therefore, Two mirrors are inclined at an angle of 30 degrees a ray of light obliquely at 180.

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Wundt studies consciousness using introspection because his subjects examined and shared their own feelings and thoughts. Wundt was the first psychologist.

Introspection refers to the examination of one's own mental and/or emotional mechanisms and processes.

Wilhelm Wundt was a distinguished psychologist who demonstrated that introspection is a highly practiced mechanism of self-examination.

W. Wundt developed the theory of conscious thought by indicating that conscious mental states can be scientifically (empirically) studied by using introspection.

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Answer: B His subjects examined and shared their own feelings and thoughts.

Explanation: Just took the test

Answer:

C would be the answer

Explanation:

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\(\longrightarrow\) The rate of change of velocity per unit time is called acceleration.

\(\longrightarrow\) Its SI unit is m/s².

\(\huge\boxed{\fcolorbox{blue}{red}{Thank you}} \)

We can then conclude from equations 1, 2, and 3 that the square having any positive integer exerts force of the type 3m or 3m + 1 on the certain integer m.

Force: Force is an element of nature that modifies or has the potential to modify an object's shape as well as its resting or moving state.

The term "force" has a clear definition in science. It is quite acceptable to refer to a force of this level as a push and a pull. A force isn't a thing that an object 'has in it' or that it 'contains.

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According to the work-energy theorem, the work done on an object by a net force equals the change in kinetic energy of the object. Essentially kinetic energy is the energy used for motion. Interestingly, as work is done on an object, potential energy can be stored in that object. A moving object has kinetic energy because work has been done on it. When work is done energy in one form is transferred to the kinetic energy of the moving object. To stop the object again, the same amount of work would have to be done to bring it back to rest.

A rectangular container measuring 19 cm x 51 cm x 62 cm is filled with water. The mass of this volume of water in kilograms is  60.4 kilograms (kg).

To calculate the mass of water in the rectangular container, we need to multiply the volume of water by the density of water.

1. Volume of water:

The volume of the rectangular container is given as:

Length (L) = 19 cm

Width (W) = 51 cm

Height (H) = 62 cm

The volume of water (V) is calculated as:

V = L × W × H

Converting the dimensions to meters:

L = 19 cm = 0.19 m

W = 51 cm = 0.51 m

H = 62 cm = 0.62 m

V = 0.19 m × 0.51 m × 0.62 m

V ≈ 0.0604 cubic meters (\(m^3\))

2. Density of water:

The density of water (ρ) is approximately 1000 kilograms per cubic meter (kg/\(m^3\)).

3. Mass of water:

Mass (m) = Volume × Density

m = 0.0604 m^3 × 1000 kg/\(m^3\)

m = 60.4 kilograms (kg)

Therefore, the mass of the volume of water in the rectangular container is approximately 60.4 kilograms (kg).

It's important to note that the density of water can vary slightly depending on temperature and impurities, but for most practical purposes, a density of 1000 kg/\(m^3\)is commonly used.

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