What is the acceleration of a 30-kg object
that is traveling at vi = 15 m/s and slows to
Ve= 5 m/s in 8 seconds?

Answer: Jenny can use many apps and Software to change her graduation photo into black and white with many tools the best tool is desaturation.

Explanation:

so theres your answer

Following the image of the ball that have been shown;

1. Potential energy

2. Kinetic energy

3. Kinetic energy

4. Potential energy

5. Kinetic energy

6. Kinetic energy

7. Kinetic energy

Due to its position or elevation, an object has potential energy while it is at rest or is elevated above the ground. Depending on the circumstances, this potential energy may either be elastic or gravitational.

Kinetic energy, or the energy connected to motion, is present when an item is in motion. An object's kinetic energy is determined by its mass and velocity .

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Answer:

1: Potential and kinetic

2: Potential and kinetic

3: Potential and kinetic

4: potential

5: Potential and kinetic

6: Potential and kinetic

7: NEITHER

Explanation:

4 is potential because its the highest point

7 is neither because the question states "the image shows the path of a ball from the time it's thrown to the time it lands on the ground" so... 7 is when the ball has landed on the ground. therefore it has neither potential nor kinetic because it is resting.

The material that need to be chosen should have a small bulk modulus.

Bulk modulus is a measure of a material's resistance to compression under pressure. A material with a large bulk modulus is difficult to compress, while a material with a small bulk modulus is easily compressed. In the design of medical apparatus requiring easy compression under pressure, a material with a small bulk modulus would be ideal.

For your medical apparatus design, you should choose a material with a small bulk modulus to ensure it can be easily compressed when pressure is applied.

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Answer:

Explanation:

Use the kinematic equation

\(V^2=V^2_i+2a(x_f-x_i)\)

The initial velocity was given from the word "falls." Acceleration due to gravity is 9.8 m/s^2.

\(V^2=0^2+200(9.8)\)

\(V=\sqrt{1960} =44.27m/s\)

A raindrop falls from a cloud 100 m above the ground. Neglect air resistance. The speed of the raindrop when it hits the ground would be 44.27 meters/ second.

The sum of all the energy in motion (total kinetic energy) and all the energy that is stored in the system (total potential energy) is known as mechanical energy.

As given in the problem A raindrop falls from a cloud 100 m above the ground. Neglect air resistance, then we have to find out the speed of the raindrop when it hits the ground,

The speed of the raindrop  = √(2gh)

                                             =√(2*9.8*100)

                                              =44.27 meters/seconds

Thus, if a raindrop falls from a cloud 100 m above the ground. Neglect air resistance. the speed of the raindrop when it hits the ground would be 44.27 meters/ second.

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The total number of significant digits in the given number is five. If the books are measured in packets of 10, the number of significant digits reduces to two.

The given data is: Total number of books in the library = 57,000. We are to determine how many significant digits are there in the result? For this, let us define what are significant digits: Digits that are used to communicate meaning or accuracy of measurements are known as significant digits. In other words, the digits that carry meaning contributing to its measurement uncertainty are called significant digits. It is used to determine the accuracy of the results. In this question, the total number of books in the library is given as 57,000. As there are five non-zero digits in the given number, there are five significant digits in the result. Will the result change if the books are measured in the packet of 10? If the number of books is measured in the packet of 10, then there will be a change in the number of significant digits. When we express 57,000 in the packet of 10, we get: 57,000 = 5.7 × 10^4. Now, there are only two significant digits in the result (5 and 7), and hence the result changes.

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Answer:   Burning of wood is a chemical change while cutting of wood is a physical change because during burning, new substances are formed. After burning, we cannot get original substance, (i.e. wood) back. Cutting of wood into small pieces is a physical change because no new substance is formed.

Answer: The answer is B. 150.002

Explanation: Add 0.0020 by 150

Force on a 0.0020 C charge in an electric field of 150 V/m will be 0.3 N

An electric field is defined as the electric force per unit charge . The electric field is radially outward from a positive charge and radially in toward a negative charge .

General formula to find Electric field is :

Electric field  = Force / charge

given

charge = 0.0020 C

Electric field = 150 V/m

Force = ?

Force  = Electric field * charge

          =  150 V/m * 0.0020 C

          = 0.3 N

Force on a 0.0020 C charge in an electric field of 150 V/m will be 0.3 N

correct answer is A) 0.30 N

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Answer:

d = 15.28 [m]

Explanation:

To solve this problem we must use Newton's second law which tells us that the sum of forces on a body is equal to zero.

Let's take the downward movement as positive i.e. the acceleration will be positive, and the resistance force as negative since it opposes the movement.

∑F = m*a

where:

∑F  =  sum of forces [N]

m = mass = 50 [kg]

a = acceleration [m/s²]

g = gravity acceleration = 9.81 [m/s²]

The forces acting on the diver are the weight down and the resistance force up.

\(F_{w}-F_{r}=m*a\)

where:

Fw = weight = m*g = mass by the gravity acceleration

Fr = resistance force = 1500 [N]

\((50*9.81)-1500=50*a\\-1009.5=50*a\\a=-20.19[m/s^{2} ]\)

The negative sign indicates that the acceleration is upward, that is, it opposes the fall of the diver in the water and for this reason it stops when it reaches 5 meters deep.

The key to solving this problem is to understand that when the diver hits the water, he does it with an initial velocity. In this way with the following formula of kinematics we can find the initial velocity or velocity of entry on the surface of the water.

\(v_{f}^{2} =v_{o}^{2} -2*a*x\)

where:

Vo = initial velocity [m/s]

Vf = final velocity = 0 (The diver comes to rest = no movement)

a = acceleration = 20.19 [m/s²]

x = distance from the diver's stopping point to the water surface = 5 [m].

\(0 = v_{o}^{2} -2*20.19*5\\v_{o}=\sqrt{(2*20.19*5)} \\v_{0}=14.2[m/s]\)

Now we use the same expression of kinematics again. But with the difference that the final velocity is the velocity of entry into the water and the initial velocity is zero since the diver is launched without initial velocity. Acceleration is equal to gravitational acceleration.

\(v_{f}^{2} =v_{o}^{2}+2*g*x_{1}\\ 14.2^{2}=0+(2*9.81*x_{1})\\201.64=19.62*x_{1}\\x_{1} = 10.28[m]\)

Then the total fall distance will be 5 meters in the water plus the calculated distance in the air.

\(d=5+10.28\\d = 15.27[m]\)

In order to solve the steps of the diving board the average net force is given as 1500N an is towards the divers fall.

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The critical angle of the transparent material is 35.3 degrees.

The critical angle is the angle of incidence at which the angle of refraction is 90 degrees. In this case, the angle of refraction is 32 degrees. Therefore, the critical angle is calculated as follows:

sin(critical angle) = sin(90 degrees) / sin(angle of refraction)

sin(critical angle) = 1 / sin(32 degrees)

sin(critical angle) = 0.574

critical angle = arcsin(0.574)

critical angle = 35.3 degrees

Therefore, the critical angle of the transparent material is 35.3 degrees.

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charge conservation, in physics, constancy of the total electric charge in the universe or in any specific chemical or nuclear reaction. The total charge in any closed system never changes, at least within the limits of the most precise observation. In classical terms, this law implies that the appearance of a given amount of positive charge in one part of a system is always accompanied by the appearance of an equal amount of negative charge somewhere else in the system; for example, when a plastic ruler is rubbed with a cloth, it becomes negatively charged and the cloth becomes positively charged by an equal amount.

Answer:

If the amplitude increases the volume increases and vice versa.So therefor the volume depends on how high or low the amplitude is.

When two or more sound waves occupy the same space, they affect one another. The waves do not bounce off of each, but they move through each other. The resulting wave depends on how the waves line up.

With constructive interference, two waves with the same frequency and amplitude line up – the peaks line up with peaks and troughs with troughs as in diagram A above. The result is a wave that has twice the amplitude of the original waves so the sound wave will be twice as loud.

The option with the smallest mass is e. 0.020 kg of Br2.Option E

To determine which option has the smallest mass, we need to compare the masses of each given quantity.

a. 10.0 mol of F2:

To find the mass, we can use the molar mass of F2, which is 38.0 g/mol. Therefore, the mass of 10.0 mol of F2 is:

10.0 mol * 38.0 g/mol = 380 g

b. 5.50 x 10^24 atoms of 12O:

To find the mass, we need to know the molar mass of 12O. However, the given molar mass is for F2, not for 12O. Therefore, we cannot determine the mass of this option.

c. 3.50 x 10^24 molecules of 12O:

Similarly, without the molar mass of 12O, we cannot determine the mass of this option.

d. 255 g of Cl2:

Since the molar mass of Cl2 is 70.9 g/mol, the number of moles in 255 g can be calculated as:

255 g / 70.9 g/mol = 3.59 mol

e. 0.020 kg of Br2:

The molar mass of Br2 is 159.8 g/mol. To convert 0.020 kg to grams, we multiply by 1000:

0.020 kg * 1000 g/kg = 20 g

Now we can determine the number of moles:

20 g / 159.8 g/mol ≈ 0.125 mol

Comparing the number of moles, we find that option d (255 g of Cl2) has the largest number of moles, indicating a larger mass compared to the other options. Among the remaining options, option e (0.020 kg of Br2) has the smallest mass. Option e

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The angle of incline of the hill above the horizontal is 8.81°.

Since the hill has a 15.5% grade is one that rises 15.5 m vertically for every 100.0 m of distance in the horizontal direction.

The tangent of the angle of the incline of the hill, Ф is

tanФ = vertical rise/horizontal distance = grade of hill

Now, the vertical rise = 15.5 m and the horizontal distance = 100.0 m

So, substituting the values of the variables into the equation, we have

tanФ = vertical rise/horizontal run

tanФ = 15.5 m/100.0 m

tanФ = 0.155

Taking inverse tan of both sides, we have

Ф = tan⁻¹(0.155)

Ф = 8.81°

So, the angle of incline of the hill above the horizontal is 8.81°.

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The pair of quantities expressed in the same units of measure is B. work and energy. Work and energy are both expressed in the same units of measure.

Both work and energy are measured in joules (J) in the International System of Units (SI). Joules represent the amount of energy transferred or work done.

Work is defined as the transfer of energy that occurs when a force is applied to an object and causes it to move in the direction of the force. The work done on an object is equal to the force applied multiplied by the distance over which the force is exerted. The unit of work, joules, represents the amount of energy transferred.

Energy, on the other hand, is the ability to do work or transfer heat. It exists in various forms, such as kinetic energy (energy of motion), potential energy (energy stored due to position), and thermal energy (energy associated with temperature). Energy is also measured in joules.

Friction and weight, mentioned in option A, are not expressed in the same units of measure. Friction is a force and is typically measured in newtons (N), while weight is a force caused by gravity and is also measured in newtons.

Therefore, the pair of quantities expressed in the same units of measure is B. work and energy.

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Answer:

Hope I helped!`

Explanation:

A) The phrase "horizontal velocity" refers to the speed at which the object is moving horizontally, while the phrase "vertical velocity" refers to the speed at which the object is moving vertically. The phrase "independent" means that one velocity does not affect the other.

B) The horizontal velocity would remain constant, while the vertical velocity would increase due to the acceleration due to gravity.

C)

I) The time taken for the object to reach the ground can be calculated using the equation:

t = sqrt(2h/g)

where h is the height of the cliff and g is the acceleration due to gravity (9.81 m/s^2). Plugging in the values, we get:

t = sqrt(2*80/9.81) = 4.04 seconds

ii) The horizontal distance traveled by the object can be calculated using the equation:

d = vt

where v is the horizontal velocity and t is the time taken for the object to reach the ground (which we calculated in part I). Plugging in the values.

The type of circuit shown in the diagram is a closed series circuit. The Option C.

The circuit diagram illustrates a closed series circuit, where the components are connected in a series, forming a single loop. In a closed series circuit, the current flows through each component in sequence, meaning that the current passing through one component is the same as the current passing through the other components.

The flow of current is uninterrupted since the circuit forms a complete loop with no breaks or open paths. Therefore, the correct answer is a closed series circuit.

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The electric field strength inside a spherical ball of charge is given by the equation;E(r) = Emax(r⁴/R⁴)Where Emax is the maximum electric field strength in the sphere.

The electric flux emanating from a point charge is directly proportional to the charge and inversely proportional to the square of the distance between the point charge and the point where the electric flux is calculated. Thus;E = Q/4πϵr²Where E is the electric field strength, Q is the charge, ϵ is the permittivity of free space and r is the distance between the point charge and the point where the electric field strength is calculated

.Since the electric field strength inside a spherical ball of charge is Emax at a distance of r = R, the maximum electric field strength, Emax, is given by;Emax = Q/4πϵR³2. inside the ball as a function of r is given by;ρ(r) = Q/V(r)Where V(r) is the volume of the spherical ball of radius r.Substituting for V(r);V(r) = 4/3πr³ρ(r) = Q/4/3πr³ρ(r) = 3Q/4πr³

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The cross product of A and B is perpendicular to both A and B.

A × B = (4i + 2j + 2k) × (4i - 4j + 8k)

A × B = 16 (i × i) - 16 (i × j) + 32 (i × k) + 8 (j × i) - 8 (j × j) + 16 (j × k) + 8 (k × i) - 8 (k × j) + 16 (k × k)

A × B = -16 (i × j) - 32 (k × i) - 8 (i × j) + 16 (j × k) + 8 (k × i) + 8 (j × k)

A × B = -16k - 32j - 8k + 16i + 8j + 8i

A × B = 24i - 24j - 24k

The magnitude of A × B is

||A × B|| = 24 ||i - j - k|| = 24√3

Dividing A × B by its magnitude gives a unit vector,

(A × B)/||A × B|| = 1/√3 (i - j - k)

Answer:

22.  C.  Pz > Py > Px

23.  B.  5.0 × 10⁴Pa

24.  B.  Upward thrust exerted by the liquid

25.  B.  The volume of the object immersed in the liquid decreases

26.  D.  When a body is wholly or partially immersed it experiences upthrust equal to the weight of the fluid displaced

Explanation:

22. The more you go deeper into the sea, the more the pressure of the water increases pushing down on you.

The reason why salt water is very dense is that when the salt dissolves in the water, it adds to the mass of the water, which makes the water more denser.

Due to this, we can assume that the water pressure exerted on the fish will be greater beneath the sea than the lake at the same depth.

Answer:   C. Pz > Py > Px

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23.

Given:

Density of water = 1000 kg m⁻³

Atmospheric pressure at sea level, Patm = 1.0 × 10⁵ Pa]

Depth of water in sea = 5m

To find the pressure exerted by the water on the fish, we use the formula: P = hpg

P = pressure

h = height or depth of water

p = density of water

g = gravitational field strength

We are given the depth and density, but not the gravitational field strength

Gravitational Field Strength:  Measures how much gravity there is

And since we live on earth, the gravitational field strength is 10 N/kg

Depth, h = 5m

Density, ρ = 1000 kg/m³

Gravitational Field Strength, g = 10 N/kg

Now we substitute these into the formula:

P = hpg

P = (5)(1000)(10)

Multiply 5 and 1000 to get 5000

P = 5000 × 10

Multiply 5000 and 10 to get 50000

P = 50000Pa

      ↓                                                                                                                                                                                                      

P = 5.0 × 10⁴Pa

Answer:   B. 5.0 × 10⁴Pa

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24. When a body is fully or partly immersed in a liquid, it undergoes an apparent loss in its weight due to upward thrust exerted by the liquid.

The upward thrust is the same as the weight of the fluid being displaced by an object.

Answer:   B. Upward thrust exerted by the liquid

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25.

When you add common salt to water it becomes denser, which can increase the mass and volume of the water. Due to water becoming denser, it can make an object thats less dense float. Also, density and volume are inversely proportional to each other, meaning that when density increases, volume decreases.

Answer:   B. The volume of the object immersed in the liquid decreases.

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26.

Achimede's principle states that:

Answer:   D. When a body is wholly or partially immersed it experiences upthrust equal to the weight of the fluid displaced.

Answer:

Explanation:

Force = Mass x acceleration = 2.4 x 5.1

If the acceleration is x, then Force is also 6.2x.

Therefore, 2.4 x 5.1 = 6.2x or x = 1.97 ≈ 2.0 m/s²

Cheers

Answer:

Okay

Explanation:

First we should quickly remind ourselves of the equation for density:density= mass/ volumeTo calculate the density we need a method of measuring the mass of each object and another method for measuring the volume of each object. To measure the mass in both cases we can simply use a measuring balance. To measure the volume we will need to use 2 separate methods. For the cube we can simply measure the length, height and depth with a ruler, multiply our measurements and we obtain the volume. The statue is a little more tricky because it has an irregular shape so we can't use the ruler anymore. Instead we should use graduated tank/trough of water. First of all measure the amount of water in the tank before putting in the statue. Then submerge the statue in the water and take another measurement of the volume of water in the tank. The statue will displace the water in the tank giving a higher value. We finally subtract the initial volume from the final volume and we should obtain the volume of the statue.We now have all the measurements necessary to calculate the density of both objects!

The balloon will go upward with acceleration of 3.1 m/s².

The upward force applied to an object that is fully or partially submerged in a fluid is known as the buoyant force. Upthrust is another name for this upward thrust. A body submerged partially or completely in a fluid appears to lose weight, or to be lighter, due to the buoyant force.

Given that

Mass of the balloon = 80 g = 0.080 kg.

Volume of the balloon = 0.3 m³.

So, weight of the balloon =  0.080 × 9.8 N = 0.784 N.

Buoyant force acting on the balloon = 0.3 × 0.35 × 9.8 N = 1.029 N.

Hence, net upward force acting on the balloon is =   1.029 N -  0.784 N =  0.248 N.

So, upward acceleration of the balloon = 0.248/0.080 m/s² = 3.1 m/s².

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Answer:

They extend directly toward the sheet.

Explanation:

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The separation between the pennies is approximately \(7.86 *10^6\) meters.To find the separation between the pennies, we need to use the formula for the electrostatic force of attraction between two charged objects:
F = \((k * |q1 * q2|) / r^2\)
Where:
- F is the force of attraction
- k is the electrostatic constant (\(9* 10^9 Nm^2/C^2\))
- q1 and q2 are the charges of the pennies (in this case, the number of electrons transferred)
- r is the separation between the pennies
Given that the mass of a copper penny is 3.0 g, we can convert it to kilograms by dividing by 1000: 3.0 g = 0.003 kg
The weight of the penny is the force due to gravity acting on it, which can be calculated using the formula:
W = m * g
Where:
- W is the weight
- m is the mass
- g is the acceleration due to gravity (9.8 m/\(S^2\))
So, the weight of the penny is:
W = 0.003 kg * \(9.8 m/s^2\) = 0.0294 N
Since the electrostatic force of attraction between the pennies is equal to the weight of a penny, we can equate the two:
F = W
Now we can solve for the separation between the pennies:
(k * |q1 * q2|) / \(r^2\) = W
Substituting the given values:
\((9 * 10^{9} Nm^{2}/C^{2} * 4.0 × 10^{12} * 4.0 × 10^{12}) / r^2\) = 0.0294 N
Simplifying the equation:
\((9 * 10^9 Nm^2/C^2 * (4.0 × 10^{12})^{2}) / r^2\) = 0.0294 N
Solving for \(r^2\):
\(r^2 = (9 * 10^9 Nm^2/C^2 * (4.0* 10^{12})^{2}) / 0.0294 N\)
Taking the square root of both sides to find r:
r = √[(9 × \(10^9 Nm^2/C^2 * (4.0 * 10^{12})^{2})\) / 0.0294 N]
Calculating the value gives:
r ≈ \(7.86 * 10^6\)meters
Therefore, the separation between the pennies is approximately \(7.86 *10^6\) meters.

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Answer: Nuclear fusion

Explanation:

Have great day!

:)

Answer:

Nuclear Fusion

Explanation:

Ap3x

Answer:

Her measurements will be more accurate if she uses a cloth tape

measure instead of a ruler.

Explanation: (apex)

The time taken for the bullet to hit the ground is 0.205 seconds.

The given initial speed of the bullet is 200.0 m/s and the initial height of the bullet above the ground is 1.00 m. The time taken for the bullet to hit the ground needs to be determined.To calculate the time it will take the bullet to hit the ground, we can use the kinematic equation:h = vit + 1/2gt²Where, h = height of the bullet above the ground, vi = initial velocity of the bullet, g = acceleration due to gravity and t = time taken for the bullet to hit the ground.

Given, h = 1.00 m, vi = 200.0 m/s, g = 9.81 m/s²Therefore,1.00 = 200t + 1/2 × 9.81 × t²1.00 = 200t + 4.905t²1.00 = t(200 + 4.905t)4.905t² + 200t - 1.00 = 0Solving for t by using the quadratic formula: t = (-b ± √(b² - 4ac))/(2a)Where, a = 4.905, b = 200, c = -1.00t = (-200 ± √(200² - 4 × 4.905 × -1.00))/(2 × 4.905)t = (-200 ± 198.9)/9.81t = (-200 + 198.9)/9.81 (rejecting the negative value as time cannot be negative)t = 0.205 seconds. Therefore, the time taken for the bullet to hit the ground is 0.205 seconds.

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Answer:

Force applied

Explanation:

An object will remain at its state of rest unless a non zero for act on it

Answer:

37.5 seconds

Explanation:

The given parameters are;

The mass of the block on the spring, m = 2.50 kg

The force with which the loaded spring launches the block, F = 450 N

The change in momentum of the block, Δp = 12.0 kg·m/s

We have;

Let the force with which the block was launched = The net force, \(F_{NET}\)

By Newton's second law of motion, we have;

F = \(F_{NET}\) = Δp × Δt

Where;

Δt = The time the block is in contact with the spring

Therefore;

\(\Delta t = \dfrac{F_{NET}}{\Delta p}\)

By plugging in the values for \(F_{NET}\) and Δp, we have;

\(\Delta t = \dfrac{450 \ N}{12.0 \ kg \cdot m/s} = 37.5 \ s\)

The time duration the block is in contact with the spring, Δt = 37.5 seconds.