a cat, also of weight 52.0 n , falls asleep on top of block a . if block b is now set into downward motion, what is its acceleration magnitude?

The work required to compress the spring an additional 1/2 m is also 10 joules. This is because the work done on the spring is equal to the potential energy stored in it.

When a spring is compressed or stretched, it stores potential energy. The amount of potential energy stored is proportional to the amount of deformation and the spring constant. The work required to compress or stretch the spring is equal to the potential energy stored in it. In this case, since it takes 10 newtons of force to hold the spring stretched 1/2 m from its equilibrium position, the potential energy stored in the spring is 10 joules. If the spring is compressed an additional 1/2 m, the work required is also 10 joules because the potential energy stored in the spring is still the same. This relationship between work and potential energy is a fundamental concept in the study of mechanics.

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It should be noted that after the big bang occurred, the universe "Became Denser" (Option B)

According to the Big Bang Theory, after the explosion which triggered the transformation of radiation into matter, gravity pulled dark matter together which in turn attracted normal matter.

Hence, it is right given the above analogy that the Universe became denser.

It should be mentioned that the big-bang hypothesis is a widely accepted account of the universe's evolution. Its defining characteristic is the universe's birth from a condition of great heat and density—the so-called big bang, which occurred 13.8 billion years ago.

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Answer:

When studying a light curve we can use that information to figure out what kind of object it is.  By measuring the dip in brightness and knowing the size of the star, scientists can determine the size or radius of the planet.

Explanation:

The information that could be gathered about a star whose light curve has multiple symmetrical depths is ; The shape and surface variegation of the star

The light curves of a KBO ( moons and stars ) are measured as a rate of the brightness of a star in relation to time. therefore the study of the light curve having multiple symmetrical depths ( depth of brightness ) will give an information about the shape/size and the surface variegation of the star

Hence we can conclude that The information that could be gathered about a star whose light curve has multiple symmetrical depths is ; The shape and surface variegation of the star

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(a) The distance travelled by the object is  100 m.

(b) The displacement of the object in time interval between t = 0 s and t = 10 s is 60 m.

(a) The distance travelled by the object is calculated from the total area of the curve.

total distance = area of triangle 1 + area of triangle 2 + area of rectangle.

total distance = (¹/₂ x base x height)₁ +  (¹/₂ x base x height)₂ + length x width

total distance = (¹/₂ x 6 s x 20 m/s) +  (¹/₂ (8 - 6) 20) + (10 - 0)(10 - 8)

total distance =  60 m + 20 m + 20 m

total distance = 100 m

(b) The displacement of the object in time interval between t = 0 s and t = 10 s is calculated as follows;

displacement = final position - initial position

displacement =  (¹/₂ x base x height)₁ +  (¹/₂ x base x height)₂ + length x width

displacement = (¹/₂ x 6 s x 20 m/s) +  (¹/₂ (8 - 6) (-20)) + (10 - 0)(10 - 8)

displacement = 60 m - 20 m + 20 m = 60 m

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Answer:

Antacids.

Explanation:

Magnesium hydroxide is commonly used for sicknesses and etc.

Answer:

Push or Pull

Gravity

Strong Nuclear Force

Weak Force

Explanation:

Answer:

Se obtienen 2,27 gramos de metanol.

Explanation:

La reacción entre monóxido de carbono e hidrógeno para producir metanol es la siguiente:

CO + 2H₂ → CH₃OH  

Para encontrar el reactivo limitante y el reactivo en exceso, debemos calcular el número de moles de CO y H₂:

\(\eta_{CO} = \frac{m}{M} \)              

En donde:    

m: es la masa

M: es el peso molecular  

\(\eta_{CO} = \frac{m}{M_{CO}} = \frac{2,0 g}{28,01 g/mol} = 0,071 moles \)

\(\eta_{H_{2}} = \frac{2,0 g}{2,02 g/mol} = 0,99 moles \)

Dado que la relación estequiométrica entre CO y H₂ es 1:2, el número de moles de hidrógeno gaseoso que reaccionan con el monóxido de carbono es:

\( \eta_{H_{2}} = \frac{2}{1}*0,071 = 0,142 moles \)      

Entonces, se necesitan 0,142 moles de H₂ para reaccionar con 0,071 moles de CO y debido a que se tienen más moles de H₂ (0,99 moles) entonces el reactivo limitante es CO y el reactivo en exceso es H₂.

Ahora podemos encontar la masa de metanol obtenida usando el reactivo limitante (CO) y sabiendo que la realcion estequiométrica entre CO y CH₃OH es 1:1.    

\( \eta_{CH_{3}OH} = \eta_{CO} = 0,071 moles \)

\( m = 0,071 moles*32,04 g/mol = 2,27 g \)

Por lo tanto, se obtienen 2,27 gramos de metanol.

Espero que te sea de utilidad!      

Answer:

2cm/year

Explanation:

20000/10000=2cm/year

10 pounds of weight is equivalent to 44.48 newtons of force.

The pound (lb) is a unit of mass commonly used in the United States and a few other countries. However, in the International System of Units (SI), the unit of force is the newton (N). Therefore, to convert pounds to newtons, we need to use the following equivalency:

1 lb = 4.448 N

This means that 1 pound is equal to 4.448 newtons of force. To convert a weight in pounds to a force in newtons, we can simply multiply the weight by 4.448. For example, if we have a weight of 10 pounds, we can convert it to newtons as follows:

10 lb x 4.448 N/lb = 44.48 N

Therefore, 10 pounds of weight is equivalent to 44.48 newtons of force.

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Contact electrification occurs any time two objects with different levels of charge make physical contact.

Contact electrification is a word that describes a phenomenon wherein surfaces end up electrically charged, thru a number of viable mechanisms, while  or greater objects come within near proximity of one another.

Static electricity is created while effective and bad costs aren't balanced. Protons and neutrons do not circulate around tons, however electrons love to jump all around the place. Whilst an item has greater electrons, it has a poor price.

Static electricity is an imbalance of electrical costs with in or at the surface of a material. The rate stays till it could pass away by an electric powered current or electric discharge.

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Acceleration is actually defined as the rate of change in velocity. The correct option is B.

Velocity is defined as the ratio of the distance moved by the object at a particular time. The velocity is a vector quantity and to represent its direction is also required with the magnitude. The unit of the measurement of the velocity is meter per second or miles per hour etc.

Acceleration is actually defined as the rate of change in velocity. In other words, it can be defined as the change in the velocity with the change in time of the object. Acceleration is also a vector quantity and requires direction and magnitude to represent it. The unit of measurement of the acceleration is a meter per second square.

Therefore, acceleration is actually defined as the rate of change in velocity. The correct option is B.

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In order to design a spring-launched roller coaster that will carry two passengers per car,  a spring constant of approximately 4255.78 N/m is needed for the roller coaster to be safe.

Several factors must be taken into consideration. The car must go up a 10-m-high hill and then descend 15 m to the track's lowest point. The maximum amount the spring can be compressed is 2.2 m, and a loaded car will have a maximum mass of 440 kg. Additionally, for safety reasons, the spring constant should be 11% larger than the minimum needed for the car to just make it over the top.

To determine the spring constant needed for the roller coaster, we can use the following formula:

U = (1/2)kx²where U is the potential energy of the spring, k is the spring constant, and x is the distance the spring is compressed. To find the minimum spring constant needed for the car to just make it over the top of the hill, we can set the potential energy of the spring equal to the potential energy of the car at the top of the hill:

U = mgh, where m is the mass of the car, g is the acceleration due to gravity, and h is the height of the hill.

U = (1/2)kx²mgh

= (1/2)kx²k = 2mgh/x²

Plugging in the given values, we get: k = 2(440 kg)(9.81 m/s²)(10 m)/(2.2 m)²k ≈ 3831.64 N/m. To find the spring constant needed for safety reasons, we can multiply the minimum spring constant by 1.11:k' = 1.11k' ≈ 4255.78 N/m

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Answer:

152,155 J

Explanation:

115,333 + 36,822 = 152,155J

Natural frequency is the count of the number of oscillations in one second.

It is 480Hz.

Answer:

the wavelength is 9.8 meters

Explanation:

We can use the relationship:

Velocity = wavelenght*frequency.

Initially we have:

wavelenght = 4.9m

velocity = 9.8m/s

then:

9.8m/s =  4.9m*f

f = 9.8m/s/4.9m =  2*1/s

now, if the velocity is doubled and the frequency remains the same, we have:

2*9.8m/s = wavelenght*2*1/s

wavelenght = (2*9.8m/s)*(1/2)s = 9.8 m

Answer:

9.8

Explanation:

By applying a force of 6.59-N to a 39.8-kg shopping cart, Carrie accelerates the cart with magnitude a such that

6.59 N = (39.8 kg) a

⇒   a ≈ 0.166 m/s²

so that over a period of 2.05 seconds, the cart's speed increases to

0.744 m/s + a (2.05 s) ≈ 1.08 m/s

Or, if you've been introduced to the concept of momentum and impulse, we get the shopping cart's initial momentum,

p₁ = (39.8 kg) (0.744 m/s) ≈ 29.6 kg•m/s

and its final momentum when it attains speed v,

p₂ = (39.8 kg) v

Then the change in momentum of the cart is

∆p = p₂ - p₁ = (39.8 kg) (v - 0.744 m/s)

and this is equal to the impulse J due to the force Carrie applies,

J = F ∆t = (6.59 N) (2.05 s) ≈ 13.5 kg•m/s

Solve for v :

J = ∆p

⇒   13.5 kg•m/s ≈ (39.8 kg) (v - 0.744 m/s)

⇒   v ≈ 1.08 m/s

The other end of the pool is 10.36 m far away from the end of the pool observed. The result is obtained by using the formula for the speed.

Speed is the rate of change in position of an object without considering the direction. It is a scalar quantity that measures the distance travelled per unit of time. It can be expressed as

s = d/t

Where

Waves on a swimming pool propagate at s = 0.740 m/s. The waves go to the opposite end, reflect and return in t = 28.0 s.

Find the distance of the end to the other end of the pool!

The waves go and return. It makes the waves reach 2 times the distance, 2d. In the speed formula, the distance will be

s = 2d/t

0.740 = 2d/(28.0)

2d = 0.740(28.0)

d = 20.72/2

d = 10.36 m

Hence, the distance of the end to the other end of the pool is 10.36 m.

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\(\boxed{ \sf{Answer}} \)

____________________

(a) A = 5 kgwt

B = 10 N

First convert 5 kgwt to N,

\(5 \times 9.8 \\ = 49 \: N\)

Net force [the forces are acting in 2 opposite directions]

\(A - B \: \\ = 49 - 10 \\ = 39 \: N\)

____________________

(b) Since, the force is greater by A ↦the block will move towards B, i.e, to the right.

____________________

(c) Frictional force will try to oppose the motion of the block but since A has greater force than B, the frictional force will be resisted.

____________________

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꧁❣ ʀᴀɪɴʙᴏᴡˢᵃˡᵗ2²2² ࿐

13954 Newtons of the saltwater will be displaced by the boat if it float on the saltwater.

The boat floating in the fresh water displaces 16000N.

We know, the weight of the liquid displaced by the boat is equal to the buoyancy of the boat.

So,

B = 16000N.

When the boat is put into the saltwater, its buoyancy will be,

B = Vpg

Where,

V is the volume of the saltwater displaced,

p is the density of the saltwater,

g is the acceleration due to gravity.

Putting values,

16000 = V(1.17)(9.8)

V = 1395.4 m³.

The weight of the saltwater will be,

Weight = 1395.4 x 10

Weight of the water displaced 13954 Newtons.

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A bar of gold (Au) is in thermal contact with a bar of silver (Ag) of the same length and area the temperature at the junction is 51.2 degree Celsius. The correct option is C.

Here, it is given that:

Let us assume that temperature of junction = T

So,

The temperature difference over Au = 80 - T

The temperature difference over Ag = T - 30

(80 - T) x \(K_{Au\) = (T - 30) \(K_{Ag\)

\(\dfrac{(80-T)}{(T-30)} = \dfrac{K_{Ag}}{K_{Au}}\)

\(=\dfrac{430}{310}\)

\(\dfrac{(80-T)}{(T-30)} = 1.39\)

So,

80 - T = 1.39T - 41.7

Solving this,

T = 50.92°C

Thus, the temperature at the junction is 51.2°C. The correct option is C.

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Your question seems incomplete, the probable complete question is:

A bar of gold (Au) is in thermal contact with a bar of silver (Ag) of the same length and area (Fig. P20.49). One end of the compound bar is maintained at 80.0°C , and the opposite end is at 30.0°C . When the energy transfer reaches steady state, what is the temperature at the junction?

A. 90.7

B. 20.2

C. 51.2

D. 30.5

E. 100.2

Sunrise at A occurs during the winter solstice, sunrise at B occurs during the vernal equinox, and sunrise at C occurs during the summer solstice.

The eastern horizon is where the sun rises, and the position of sunrise changes throughout the year due to the tilt of the Earth's axis.

In this case, the diagram shows three different positions of sunrise, A, B, and C.

Here's the correct pairing of the location of sunrise to the time of the year:

A - Winter Solstice (December)
B - Equinoxes (March and September)
C - Summer Solstice (June)

During the Winter Solstice (A), the sun rises at its southernmost point on the horizon. During the Equinoxes (B), the sun rises due east, and during the Summer Solstice (C), the sun rises at its northernmost point on the horizon.

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n is the answer I guess

not so sure

A crane lift a pallet of brick to the top of a 80 m building, requiring 400 kJ of energy, Therefore, the mass of the pallet is 502 kg.

Mass is a measure of the amount of matter in an object. It is usually expressed in kilograms (kg) or grams (g). Mass is an important physical property because it is related to a number of other physical properties, such as inertia, gravitational force, and momentum. In order for an object to have mass, it must have a certain amount of matter. Mass is distinct from weight, which is a measure of the force of gravity on an object.

The mass of the pallet can be calculated using the formula:

Mass (m) = Energy (E) / Work (W)

Where Work is calculated as:

Work (W) = Force (F) x Distance (d)

The force required to lift the pallet can be calculated from the height of the building:

Force (F) = Mass (m) x Acceleration due to Gravity (g)

Therefore, the mass of the pallet is:

m = E / (m x g x d)

m = 400 kJ / (9.81 m/s2 x 80 m)

m = 502 kg

Therefore, the mass of the pallet is 502 kg.

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Answer:

2 atoms

Explanation:

Answer:

Light splits up into different colors because of the electromagnetic spectrum which makes the light bend, wavelength, and it makes different colors by it :3

Explanation:

:3

None of the given options are correct. When converting concentration, the appropriate number of significant figures depends on the precision of the original measurement and the least precise value involved in the conversion. Here's a general guideline:

1. Determine the least precise value involved in the conversion. This is usually the value with the fewest significant figures. 2. The result of the conversion should have the same number of significant figures as the least precise value.

For example, let's say you have a concentration measurement of 3.42 mol/L and you want to convert it to millimoles per liter (mmol/L). The conversion factor is 1 mol = 1000 mmol.

Since the original concentration measurement has three significant figures (3.42), the result of the conversion should also have three significant figures. Therefore, the appropriate number of significant figures in this case is 3.

In general, when converting concentrations, it's important to maintain the appropriate number of significant figures to avoid introducing unnecessary precision or inaccuracies into the final result.

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The movement of wave can be detected using scientific instruments.

One such example is Seismometer.

Thus, the statement is false.

Answer:

true

Explanation:

The law of conservation of charge states that whenever electrons are transferred between objects, the total charge remains the same.