a force a. is expressed in newtons. b. can cause an object to speed up, slow down, or change direction. c. is a push or a pull. d. all of the above

Answer: True

Explanation: Light enters your eye through the lens which then hits the retina which is located in the back of your eye.

Answer:

1. 30,000 Kelvin, or 53,540 Farenheit, or 29,726 Celcius

2. i'm not sure, I'm sorry. I know that there are several, and one of them is helium.

3. This fusion changes the inner composition of the star, eventually it becomes a red giant or supergiant

Explanation:

Hope this helps :)

Formula for momentum:

\(p=mv\)

momentum(measured in kg*m/s) = mass(measured in kg) * velocity(measured in m/s)

__________________________________________________________

Given:

\(m=1650kg\)

\(v=42m/s\)

\(p=?\)

__________________________________________________________

Finding momentum:

\(p=mv\)

\(p=1650\times42\)

__________________________________________________________

Answer:

\(\fbox{p = 69,300 kg*m/s}\)

Answer:

Density is defined as:

Density = Mass/Volume

Now, density is an intensive property, this means that if you have 10 grams of a given material or 1000 grams of the same material, in both cases you will find the same density.

Then a roll of 50 pennies has the same density that a single penny.

The measures of a single penny are:

Mass = 2.5 g

Thickness = 1.52 mm

Radius = 9.525 mm

The coin is a cylinder, and the volume of a cylinder is:

V = pi*r^2*h

where:

pi = 3.14

r = radius = 9.525mm

h = thikness = 1.52mm

The volume is:

V = 3.14*(9.525mm)^2*1.52mm = 433.015 mm^3

The density will be:

D = 2.5g/433.015mm^3 = 0.00577 g/mm^3

Answer:

It is not still true that the average velocity of the particle is equal to half the sum of the initial and final velocities when the acceleration of the particle is not constant

Explanation:

The motion of a particle under constant acceleration, 'a', is be given by the following kinematic equations;

v² = u² + 2·a·s

v = u + a·t

Where;

v = The final velocity of the particle

u = The initial velocity of the particle

a = The acceleration of the particle

s = The distance through which the particle travels

t = The time of motion of the particle

By simplifying the above equation, we have;

v² - u² = 2·a·s

(v² - u²)/(2·a) = s

(v - u) × (v + u)/(2 × a) = s

((v - u)/a) × ((v + u)/2) = s

From v = u + a·t, we have;

t = (v - u)/a

∴ ((v - u)/a) × ((v + u)/2) = t × ((v + u)/2) = s

∴ ((v + u)/2) = s/t

The average velocity = (Total distance traveled by the particle) ÷ (The time of travel of the particle)

∴ The average velocity = s/t = ((v + u)/2) = Half the sum of the initial and final velocity

However, it is not still true that the average velocity of the particle is equal to half the sum of the initial and final velocities when the acceleration of the particle, 'a', is not constant, as the velocity time graph is no longer a straight line graph and the distance traveled by the particle, 's', which is the area under the velocity time graph, 'A', (given by the sum of area of the triangle and the rectangle given by the area under straight line graph for constant velocity) cannot be given directly by the product of the time and the average velocity.

Take the direction of motion to be the positive direction. The crate slows to a rest from 30.0 m/s in a matter of 5.0 s, so it has acceleration a such that

0 = 30.0 m/s + a (5.0 s)   →   a = -6.0 m/s²

At the moment its speed is 0, the crate has a net force of s + f acting in negative direction, where s and f denote the magnitudes of the stopping force (s = 250 N) and the friction force, respectively. By Newton's second law, we have

(-s) + (-f) = (100 kg) (-6.0 m/s²)

250 N + f = 600 N

f = 350 N

The friction force is proportional to the normal force by a factor of µ, the coefficient of kinetic friction. There is no movement in the up- and downward directions, so Newton's second law says

(-w) + n = 0

where w is the weight of the crate and n is the magnitude of the normal force. So

n = w = (100 kg) (9.80 m/s²) = 980 N

Then

f = µ n

350 N = µ (980 N)

µ = (350 N) / (980 N) ≈ 0.357

Answer:

75kg dining table

Explanation:

its the heaviest

more force would be required to push it

so it has greater inertia

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Answer:

C.

Explanation:

EDGE 2023

Answer: (6.2 x 10^18m) (4.7 x 10^-10m)

multiply the decimal numbers first:  6.2 x 4.7 = 29.14

multiply the base ten numbers by adding the exponents:

10^18m x 10^-10m = 10^8m

now you have:

29.14 x 10^8m

that's it -- unless you need to write the final answer in scientific notation.  If so, you have to adjust the exponent for the base 10 to get:

2.914 x 10^(8m+1)

;)

Explanation:

Answer:

Brainliest please thanks

Answer:

Number 1 is c and number 2 is a

Answer:

8.89 m/s

Explanation:

rate = distance/time

40m/4.5 sec = 8.8888889 m/s

The correct answer is d) The anode is the cobalt electrode and the cell potential is +0.39 V. In a standard lead-cobalt cell, the anode is the cobalt electrode and the cell potential is +0.39 V.

This is because the cobalt electrode has a higher reduction potential than the lead electrode, meaning that electrons will flow from the cobalt to the lead electrode. The cell potential is the difference in the reduction potentials of the two electrodes, and since the cobalt electrode has a higher reduction potential, the cell potential is positive. The cell potential is measured in volts, and in this case it is +0.39 V.

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Heat waves are defined by the difference in temperature compared to the normal temperature typical of a region.

A heatwave happens when a location has extremely high maximum and minimum temperatures over the course of three days. This is taken into account in light of the area's climate and previous weather patterns.

An protracted period of unusually warm weather that frequently lasts longer than two days is known as a heat wave. Heat waves can occur both with and without a lot of humidity. They can spread out across a large region, placing many people in danger of extreme heat.

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Answer: mass

The mass of a person is constant, weight is a force that is influenced by gravity.

The spring constant the spring which exerts a force of 3.92 N on the object is 131 N/m

The mass of the object attached to the spring = 0.4 kg

The distance stretched by the spring = 3 cm

The spring constant can be found using the formula,

           F = kx

where F is the force

           k is the spring constant

           x is the distance streched

The formula for the force is

          F = ma

where m is the mass

           a is the acceleration due to gravity [in this question]

Thus, the formula for the spring constant is

       k = mg /x

Let us substitute the known values in the above equation, we get

      k = 0.4 x 9.8 / 3 x 10⁻²

         = 3.92 / 3 x 10⁻²

         = 1.31 x 10²

         = 131 N/m

Therefore, the spring constant is 131 N/m

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By 0.27m, the kitchen is farther than the hallway. Because Kim's home's hallway is 4.63 metres long. The distance of her kitchen is 0.0049 kilometres. The distance is same in any velocity.

Distance is measured numerically or sporadically qualitatively. far apart certain things or points are. Distance in physics or common language can refer to a physical length or an assumption based on other factors. Purposes In disciplines that study human behaviour, such the social sciences, qualitative measurements are frequently used. The rate of change in an object's position relative to a frame of reference is called velocity, and it depends on time.

4.9m is equal to 0.0049 km;

the difference is equal to 4.9 - 4.63;

and the difference is equal to 0.27.

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Answer:

A. Pull together

Explanation:

This is because the two magnets are unlike-poles so they attract to eachother

Answer:

1.An object at rest has zero velocity - and (in the absence of an unbalanced force) will remain with a zero velocity. Such an object will not change its state of motion (i.e., velocity) unless acted upon by an unbalanced force.

3.Let speed of balls are v

1

and v

2

.

There is no external force acting, momentum will be conserved.

m

1

u

1

+m

2

u

2

=m

1

v

1

+m

2

v

2

⇒m×6−m×6=mv

1

+mv

2

⇒v

1

=−v

2

Coefficient , e=−

u

1

−u

2

v

1

−v

2

⇒

3

1

=−

6+6

v

1

−v

2

⇒v

1

=−2m/sWhen two objects with the same mass collide, Newton's laws tell us that they will accelerate the same amount but in opposite directions.

Collision Forces - 5/5

1. A) Motion will be either created, stopped or changed.

2. D) 5,208 N

3. B) the mass and acceleration of each person

4. C) balanced forces

5. B) 13.125 N to the right

Hope this helps ya out peeps!

The opportunity cost of a potholder for Martha Stewart is 0.55 gift baskets, as she could have produced 0.55 gift baskets in the same amount of time it took to produce one potholder.

The opportunity cost of a potholder for Stewart is 0.66 gift baskets, as she could have produced 0.66 gift baskets in the same amount of time it took to produce one potholder. Comparing the opportunity costs, Martha has a lower opportunity cost of producing potholders than Stewart. This means that Martha has a comparative advantage in producing potholders, as she has to give up less in terms of gift baskets to produce potholders. On the other hand, Stewart has a lower opportunity cost of producing gift baskets than Martha. This means that Stewart has a comparative advantage in producing gift baskets, as she has to give up less in terms of potholders to produce gift baskets.

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Answer:

The thickness of sponge is the dependent variable in this investigation

Explanation:

This is because in the investigation, the amount of mass is the property to be varied while the thickness of the sponge is the property to be checked.

The thickness of the sponge is dependent on the amount of mass placed on it, so the thickness of the sponge depends on the mass.

Thus, the thickness of the sponge is the dependent variable in this instance while the amount of mass is the independent variable in this investigation.

An image that remains after a stimulus is removed is called an afterimage

Afterimages occur because photochemical activity in the retina continues even when the eyes are no longer experiencing the original stimulus.

For example after looking at something bright, such as a lamp or a camera flash, you may continue to see an image of that object when you look away, this is because flash of light prints a lingering image in your eye. This lingering image is called afterimage.

Afterimage can also be defined as a lasting memory image of something.

Therefore the image that is formed after a stimulus has been removed is called afterimage

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Answer:

9 x 10 ^9 yrs    ( 9 billion years <=====older than Earth !)

Explanation:

.25 = 1.0 (1/2) ^n

.25 / 1.0 =   = (1/2 )^n

log .25 =  n log 1/2

n = 2 half lives

2 * 4.5 x 10^9 =   9 x 10 ^ 9 yrs

Answer:

node jaer  le cotenidonv

Explanation:

escirbloa em cuietw n   bl********

(B) and (C) both describe methods that are used to study past magnetic reversals on the ocean floor.

Isotopic analysis of ocean core sediments can help determine the age of the sea floor and reveal information about past magnetic fields.

Magnetic particles in basalt can also be used as a record of past magnetic fields, as they orient with the magnetic field at the time of solidification.

The ocean floor is not uniformly old, but rather new sea floor is constantly being formed at mid-ocean ridges and spreading away from these locations, preserving a record of Earth's magnetic history.

Mantle hot spots are not always oriented to the magnetic field, but rather are thought to be associated with the movement of large mantle plumes that are not directly controlled by the magnetic field.

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An ulterior motive refers to a hidden or underlying reason behind someone's actions or behavior that may not be immediately apparent. Among the options provided, example C) "Becky went on a date with Rick because she hoped she'd get a free meal" is an example of an ulterior motive. Option C

In this scenario, Becky's motive for going on a date with Rick is not driven by genuine interest or connection but rather the expectation of receiving a free meal. Her primary intention is to benefit from the meal rather than building a meaningful relationship or enjoying the company of her date. The ulterior motive becomes evident as Becky's focus is more on the material gain rather than the interaction itself.

On the other hand, examples A) and B) do not demonstrate ulterior motives. In example A), Johan shares a web radio site with his co-worker Sandi because he genuinely believes she would enjoy it, without any hidden agenda. In example B), Brian selflessly shares his sandwich with Marco when he realizes Marco forgot his lunch, without any expectation or hidden motive.

Example D) does not involve an ulterior motive either. Jerome's act of picking up litter and placing it in the trash may not have received acknowledgement or thanks, but the action itself does not suggest any hidden agenda or underlying motive. It can be seen as a selfless act of environmental responsibility.

In summary, ulterior motives involve hidden intentions or agendas that may not be immediately apparent. Among the given options, example C) is the one that exhibits an ulterior motive, as Becky's primary motive for going on a date is to obtain a free meal.

Option C

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Ice core data from Antarctica shows that going back 800,000 years before the early 1900s, atmospheric CO2 concentration was never above 300 parts per million (ppm).

Ice cores extracted from Antarctica provide scientists with valuable information about past climate conditions, including atmospheric CO2 concentrations. By analyzing air bubbles trapped in the ice, scientists can determine the levels of CO2 present in the atmosphere at different time periods.

Based on the analysis of ice cores, it has been observed that over the past 800,000 years, prior to the early 1900s, atmospheric CO2 concentrations remained below 300 ppm. This long-term data provides important context for understanding the recent increase in CO2 levels, primarily driven by human activities such as the burning of fossil fuels.

While there have been natural fluctuations in CO2 levels over geological timescales, the ice core data indicates that the current levels of atmospheric CO2 are unprecedented in at least the past 800,000 years.

Ice core data from Antarctica reveals that prior to the early 1900s, atmospheric CO2 concentrations had never exceeded 300 ppm over the past 800,000 years. This historical perspective highlights the significant impact of human activities on the current rise in CO2 levels and emphasizes the need for effective measures to mitigate climate change.

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Answer:

\(E=\dfrac{1}{2}mv^2\)

Explanation:

If m is the mass of the object and v is the velocity of the object. The kinetic energy is due to the motion of an object. It is given by the relation as follows :

\(E=\dfrac{1}{2}mv^2\)

The above formula is used to find the kinetic energy of an object.