A 2kg ball is held at a height with 250J of gravitational potential energy. The ball is dropped. Calculate the velocity of the ball just before it hits the floor.

Answer:

5 m

Explanation:

We'll begin by calculating the original potential energy. This can be obtained as follow:

Mass (m) = 0.2 Kg

Height (h) = 20 m

Acceleration due to gravity (g) = 10 m/s²

Energy (E₀) =?

E₀ = mgh

E₀ = 0.2 × 10 × 20

E₀ = 40 J

Next, we shall determine the new energy of the ball.

Energy (E₀) = 40 J

Energy lost (Eₗ) = 30 J

New energy (E) =?

E = E₀ – Eₗ

E = 40 – 30

E = 10 J

Finally, we shall determine height of the ball on rebound. This can be obtained as follow:

New energy (E) = 10 J

Mass (m) = 0.2 Kg

Acceleration due to gravity (g) = 10 m/s²

Height (h) =?

E = mgh

10 = 0.2 × 10 × h

10 = 2 × h

Divide both side by 2

h= 10 / 2

h = 5 m

Thus, the height of the ball on rebound is 5 m

Answer:

1.The incident Ray,the refracted Ray and the normal at the point of incidence,all three lies in the same plane

2.the ratio of sine of angle of incidence to the sine of angle of refraction is constant for a pair

Answer:

Explanation:

Given:

F = 300 N

p = 20 N/m²

__________

A - ?

Valid for the area A:

A = F / p

A = 300 / 20 = 15 m²

Answer:

3 bands

Explanation:

Basically, the Parametric EQ divides the audio spectrum into three bands, allowing you to enhance (or suppress) the level in that range.

Answer:

Explanation:

Given:

A = 0.1 m²

F = 200 N

_________

p - ?

Pressure:

p = F / A

p = 200 / 0.1 = 2 000 Pa

To convert the ideal-gas equation to relate Ppsig, Vft³, nlb-mole, and T°F and the total amount of gas is calculated by converting the moles of CO and N to lb-mole and to estimate the temperature needed to increase the gas pressure to 3000 psig, Convert the obtained temperature in K to °F.

The equation relating P (psig), V (ft³), n (lb-mole), and T* (°F) is:

P = 14.7 * P(atm), V = 28.3168 * V(L), n

= 2.20462 * n(mol), and T*

= (9/5) * T(K) - 459.67 and to calculate the total amount of gas in lb-mole, multiply the number of moles of CO by its molar mass and convert to lb-mole and to estimate the temperature in °F required to increase the gas pressure to 3000 psig.

(a) To convert the equation, we need to apply the following conversions:
- To convert P from atm to psig, multiply by 14.7 (since 1 atm = 14.7 psig).
- To convert V from liters to ft³, multiply by 28.3168 (since 1 liter = 0.0353 ft³).
- To convert n from mol to lb-mole, multiply by 2.20462 (since 1 mol = 2.20462 lb-mole).
- To convert T from K to °F, use the conversion formula:

T* = (9/5) * T(K) - 459.67.

(b) To calculate the total amount of gas in lb-mole, multiply the number of moles of CO by its molar mass (using the periodic table) and convert to lb-mole by multiplying by the molar mass of CO (28.01 lb/lb-mol). To calculate the mass of CO in lb, multiply the number of moles of CO by its molar mass (28.01 g/mol) and convert to lb by dividing by 453.59237 g/lb.

(c) To estimate the temperature in °F required to increase the gas pressure to 3000 psig, rearrange the ideal gas equation to solve for T*. Substitute the known values: P = 3000 psig (pressure limit), V = 3.5 ft³ (volume), n = 30.0 mole (number of moles), and solve for T*. Note that this estimate may not be accurate at high pressures.

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Answer:

a on edge

Explanation:

Answer:

\(\boxed {\boxed {\sf 299.568 \ Joules }}\)

Explanation:

Kinetic energy can be found using the following formula:

\(E_k=\frac{1}{2}mv^2\)

where m is the mass and v is the velocity.

The mass of the person is 60 kilograms and the velocity is 3.16 meters per second

\(m= 60 \ kg \\v= 3.16 \ m/s\)

Substitute the values into the formula.

\(E_k=\frac{1}{2} (60 \ kg) *(3.16 \ m/s)^2\)

First, evaluate the exponent.

\(E_k=\frac{1}{2}(60 \ kg ) (9.9856 \ m^2/s^2)\)

Multiply 60 kg by 9.9856 m²/s²

\(E_k=\frac{1}{2} (599.136 \ kg*m^2/s^2)\)

Multiply 599.136 kg*m²/s² by 1/2, or divide by 2.

\(E_k=299.568 \ kg*m^2/s^2\)

\(E_k= 299.568 \ J\)

The running person has a kinetic energy of 299.568 Joules.

Solution:

We know that, Kinetic energy(kE)= 1/2×m×v^2

By applying formula,we get

Or,KE=1/2×60×3.16^2

Or,kE=299.57j

So,her kinetic energy is 2999.5j

Answer: B) unbalanced forces

Explanation:

        500 N and 600 N are not equal to each other. The two people are also pulling on the chain in opposite directions. Using these given pieces of information, we can decide that the answer is unbalanced forces acting upon the chain.

                 500 N ≠ 600 N

The speed of a proton whose de Broglie wavelength is 4.0 x 10⁻⁷ m is approximately 1.1 x 10⁴ m/s.

To find the speed of a proton with a given de Broglie wavelength, we can use the de Broglie wavelength equation:

λ = h / (m * v)

λ is the de Broglie wavelength,

h is Planck's constant (h = 6.6 x 10⁻³⁴ J·s),

m is the mass of the proton (m = 1.7 x 10⁻²⁷ kg),

v is the speed of the proton.

Rearranging the equation to solve for v, we have:

v = h / (m * λ)

Substituting the given values, we get:

v = (6.6 x 10⁻³⁴ J·s) / (1.7 x 10⁻²⁷ kg * 4.0 x 10⁻⁷ m)

Simplifying the expression, we find:

v ≈ 1.1 x 10⁴ m/s

Therefore, the speed of the proton is approximately 1.1 x 10⁴ m/s.

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ANSWER

EXPLANATION

Parameteters given:

Initial velocity = 190 m/s

To find the maximum height, we apply the formula for the maximum height of a projectile:

where u = initial velocity

θ = angle with the horizontal

g = acceleration due to gravity = 9.8 m/s²

From the question, the projectile is fired vertically upward. This means that the projectile will make a 90° angle with the horizontal.

Therefore, we have that the maximum height of the projectile is:

Answer:

Height is equal to 1841.8367m

Explanation:

KE = GPE

Write out the formula

1/2(m)(v^2) = mgh

Fill it with the information you have

1/2(190^2) = (9.8)(h)

Solve

1/2(36100) = 9.8h

18050 = 9.8h

1841.83673 = h

Write the complete answer out

Maximum height is equal to 1841.8367m (meters)

Answer:

please help

Explanation:

Answer:

amp = 5 and wavelength = 6

Explanation:

Answer:

B. Cant stop things from going wrong.

Explanation:

To me it's the only reasonable answer...

The magnitude of the rocket's acceleration is 12.5 m/s².To find the magnitude of the rocket's acceleration, we can use the equation of motion: \(v^2 = u^2 + 2as\)

The above equation has  v is the final velocity, u is the initial velocity, a is the acceleration, and s is the distance traveled. Rearranging the equation, we have \(a = (v^2 - u^2) / (2s)\).Given that the initial velocity (u) is 20.0 m/s, the final velocity (v) is 30.0 m/s, and the distance traveled (s) is 40.0 m, we can substitute these values into the equation:

a = (30.0² - 20.0²) / (2 * 40.0)

= (900 - 400) / 80

= 500 / 80

= 6.25 m/s².

Therefore, the magnitude of the rocket's acceleration is 6.25 m/s².

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According to the data given in the question the net force on the box is of 5 N.

All of the forces that are applied to an object are added up to form the net force. As a consequence of the fact that it (force) is a vector and therefore that two forces with identical magnitudes and opposing directions cancel each other out, the resultant force is the total of the forces, or put another way, the net force is just the total of all the forces.

Given data :

Force on box to the left side (F1) = 15 N

Force on box to the right side (F2) = 20 N

Because both forces are in opposite direction

Hence,

Net force = F2 - F1

Net force = 20 - 15

Net force = 5 N.

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Answer:

J = 500 kg-m/s

Explanation:

Given that,

Initial speed of the motor, u = 5 m/s

Final speed of the motor, v = 7 m/s

Mass of the boat, m = 250 kg

We need to find the impulse applied by the motor. We know that impulse is equal to the change in momentum. It is represented by letter J.

J = m(v-u)

J = 250 (7-5)

J = 500 kg-m/s

Hence, the impulse applied by the motor is 500 kg-m/s.

Starting from rest on a circular track with a radius of 300 m and a constant tangential acceleration of 0.75 m/s², the car will travel a distance of approximately 0.2119 meters or 21.19 centimeters in 0.75 seconds.

To determine the distance traveled and the time elapsed by the car starting from rest on a circular track with a radius of 300 m and a constant tangential acceleration of 0.75 m/s², we can use the equations of circular motion.

The tangential acceleration is the rate of change of tangential velocity. Since the car starts from rest, its initial tangential velocity is zero (v₀ = 0).

Using the equation:

v = v₀ + at

where v is the final tangential velocity, v₀ is the initial tangential velocity, a is the tangential acceleration, and t is the time, we can solve for v:

v = 0 + (0.75 m/s²) * t

v = 0.75t m/s

The tangential velocity is related to the angular velocity (ω) and the radius (r) of the circular track:

v = ωr

Substituting the values:

0.75t = ω * 300

Since the car starts from rest, the initial angular velocity (ω₀) is zero. So, we have:

ω = ω₀ + αt

ω = 0 + (0.75 m/s²) * t

ω = 0.75t rad/s

We can now substitute the value of ω into the equation:

0.75t = (0.75t) * 300

Simplifying the equation gives:

0.75t = 225t

t = 0.75 seconds

The time elapsed is 0.75 seconds.

To calculate the distance traveled (s), we can use the equation:

s = v₀t + (1/2)at²

Since the initial velocity (v₀) is zero, the equation becomes:

s = (1/2)at²

s = (1/2)(0.75 m/s²)(0.75 s)²

s = (1/2)(0.75 m/s²)(0.5625 s²)

s = 0.2119 meters or approximately 21.19 centimeters

Therefore, the car travels a distance of approximately 0.2119 meters or 21.19 centimeters.

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Answer:c large, spherical body that orbits in a clear path around a star

Explanation:]

All planets in the universe are the large, spherical body that orbits in a clear path around a star. Therefore, option (C) is correct.

Planets can be described as astronomical bodies which are orbiting a star and are big enough to have their own gravity.

In the solar system, a planet is a body that revolves around the sun in fixed orbits and does not have the light of its own but reflects the light of the sun. They do not twinkle like other stars which are too close to us.

Our solar system consists of 8 planets which are in the order of Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.

With approximately two trillion galaxies within our observable Universe,  and are approximately 10²⁵ planets that orbit stars, with some approximately 10²⁶ to 10³⁰ additional starless planets.

Therefore, option (c) is correct according to which planets are the large, spherical body that orbits in a clear path around a star.

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After 1 hour, 80 g decays to 40 g.

After another hour (total 2 hours), 40 g decays to 20 g.

After another hour (total 3), 20 g decays to 10 g.

After one more hour (total 4), 10 g decays to (D) 5 g.

Answer:

50 kg

Explanation:

f=ma

Force = mass x acceleration

490 = 9.8 x m

m = 50 kg

Answer:

1. Transform Boundary

2.  Continental-continental convergent boundary

3. Oceanic-Oceanic Divergent boundary

Explanation:

The wire is insulated with a layer of plastic or paint around the outside when wound into a coil to form an electromagnet to prevent the wire from shorting out against itself or other conductive materials.

When an electric current flows through a wire, it generates a magnetic field around the wire. By coiling the wire, the magnetic field is strengthened, creating a more powerful electromagnet.

However, if the wire is not insulated, the coils can touch each other, creating a short circuit that can damage the wire or the power source. Insulating the wire with a layer of plastic or paint prevents this from happening by creating a barrier between the wire and other conductive materials.

This allows the electric current to flow through the wire and generate the magnetic field, while also protecting the wire and ensuring that the electromagnet works properly.

​

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Answer:

9. forces: BALANCED, object will: NOT ACCELERATE

10. Forces: UNBALANCED, object will: ACCELERATE

Explanation: sorry I don't no the net force but hope this helps for know

When a thick plate of glass with parallel surfaces is placed in the path of converging light, it will cause the light to refract or bend as it passes through the glass.

The extent to which the light bends depends on the refractive index of the glass. If the refractive index of the glass is greater than that of air, the light will bend towards the normal, while if it is less than that of air, the light will bend away from the normal.
In the case where two rays of light converge to a point on a screen and a thick plate of glass with parallel surfaces is placed in their path, the point of convergence will be shifted. This is because the light rays that are passing through the glass will be bent towards or away from the normal, depending on the refractive index of the glass. This will cause the rays to diverge or converge at a different point on the screen.
In conclusion, the point of convergence will be shifted when a thick plate of glass with parallel surfaces is placed in the path of converging light. The amount of shift will depend on the thickness and refractive index of the glass, as well as the angle of incidence of the light rays.

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Place theory argues that sounds of different frequencies induce vibration in different areas of the basilar membrane within the cochlea of the inner ear.

According to this theory, the specific location of these vibrations allows the brain to identify and interpret the frequency of a sound. High-frequency sounds cause the basilar membrane to vibrate near the base, closest to the oval window, while low-frequency sounds cause vibrations near the apex, or the end farthest from the oval window. The hair cells lining the basilar membrane are responsible for translating these vibrations into neural signals, which are then sent to the auditory nerve and eventually to the auditory cortex of the brain for processing.

The arrangement of hair cells along the basilar membrane creates a tonotopic map, meaning that each area is tuned to respond to specific frequencies, this spatial arrangement allows the brain to determine the pitch of a sound based on the location of the activated hair cells. In summary, place theory posits that the perception of different sound frequencies is determined by the specific location of vibrations along the basilar membrane. The tonotopic organization of hair cells helps the brain accurately identify and interpret various frequencies by detecting the origin of these vibrations.

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The pressure in your tires would decrease due to the decrease in temperature. The relationship between temperature and pressure is known as the ideal gas law.

which states that pressure and temperature are directly proportional to each other. As the temperature drops, so does the pressure in the tires. The ideal gas law formula is P1/T1 = P2/T2, where P1 is the initial pressure, T1 is the initial temperature, P2 is the final pressure, and T2 is the final temperature.

Using this formula and assuming that the volume of the tires remains constant, we can calculate the final pressure in the tires. P1 is 38 psi, T1 is 25°C + 273.15 (to convert to Kelvin) = 298.15 K, T2 is 0°C + 273.15 = 273.15 K. Plugging in the values, we get P2 = (38 psi * 273.15 K) / 298.15 K = 34.9 psi. Therefore, the pressure in your tires would be approximately 34.9 psi when the temperature drops to 0°C.

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Receptacle is defined as a point in the electrical system where electrical energy is Installed.

The Latin term receptaculum, which denotes a location to receive and keep items, is the source of the English word "receptacle."

Receptacles and electrical outlets are types of sockets that are used to create an electrical connection between a power source and an electronic device.

There are several different types of outlets, including two-pronged outlets, grounded outlets, tamper-resistant outlets, arc fault circuit interrupter outlets, surge suppression outlets, and USB outlets.

According to Section 210.52 of the US National Electrical Code, every kitchen, bedroom, living room, family room, and other room with a designated living area must have an electrical outlet. They must be placed at intervals of no less than twelve feet along the floor line.

Correct option: (B) Installed

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