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If a roller coaster starts with no initial velocity at a height of 2m , what would be the velocity of the coaster at the bottom of the track?

Explanation:

P=E/T

E=15N

T=2s

P=15/2

P=7.5

Answer:

Explanation:

We shall apply the law of conservation of momentum to calculate the momentum and the speed of daughter nucleus .

Since the velocity of electron is very high we shall apply relativistic formula to calculate its momentum .

= \(\frac{mv}{\sqrt{1-(\frac{v}{c})^2 } }\)

\(= \frac{9.11 \times 10^{-31}\times 5\times 10^7}{\sqrt{1-(\frac{5\times10^7}{3\times 10^8})^2 } }\)

45.55 x 10⁻²⁴ x 1.176

= 53.58 x 10⁻²⁴ .

momentum of neutrino = 8 x 10⁻²⁴ . They are perpendicular to each other so total momentum

= √ [( 53.58 x 10⁻²⁴ )²+(8 x 10⁻²⁴)²]

= 54.17 x 10⁻²⁴

Hence the momentum of recoiled daughter nucleus will be same but in opposite direction

velocity of recoil = momentum / mass

= 54.17 x 10⁻²⁴ / 2.34 x 10⁻²⁶

= 23.15 x 10² m /s

Answer:

A. it contains ultraviolet, visible, and infrared light

Answer:

It is divided into seven ranges of wavelengths

Explanation:

i took the test

Answer:

Explanation:

To convert gram / centimeter³ to kg / m³

gram / centimeter³

= 10⁻³ kg / centimeter³

= 10⁻³  / (10⁻²)³ kg / m³

= 10⁻³ / 10⁻⁶ kg / m³

= 10⁻³⁺⁶ kg / m³

= 10³ kg / m³

So we shall have to multiply be 10³ with amount in gm / cm³ to convert it into kg/m³

2.33 gram / cm³

= 2.33 x 10³ kg / m³ .

That statement is not entirely accurate. Whether a material is an insulator, resistor, or conductor depends on its electrical conductivity, which is a measure of how easily electric current can flow through the material.

Dislodging of electrons refers to the process of removing electrons from an atom or molecule. This can occur through various mechanisms, such as exposure to high-energy radiation or chemical reactions.

Here,
In conductors, such as metals, electric charges can move freely, while in insulators, such as rubber or glass, the electrons are tightly bound to the atoms and cannot move easily. Resistors, on the other hand, are materials that have an intermediate level of conductivity and are used to regulate the flow of electric current.

However, the ease or difficulty of dislodging electrons from atoms can play a role in determining the electrical conductivity of a material.

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Answer:

1/2 m v^2 - G M m / R      escape velocity equal to energy at surface

v^2 = 2 G M / R = 2 * 6.67E-11 * 7.4E22 / 1.7E6

v^2 = 2 * 6.67 * 7.4 / 1.7 * 105 = 5.81E6

v = 2410 m/s = 2400 m/s

Answer:

i believe it is 5

Explanation:

because if it moves at 100 miles per hour after 5 hours you will have 500 miles

because 5 multiplied by 100 equals 500

Answer:

5 hrs

Explanation:

distance / rate = time

500 km  /   100 km/hr = 5 hours

Based on the mass of the liquid and the mass of the cylinder, the reading shown on the balance is 1.593 kg.

To calculate the reading shown on the digital balance, we need to first find the mass of the liquid in the cylinder, and then add it to the weight of the empty cylinder.

The volume of the liquid can be found using the formula for the volume of a cylinder:

V = πr²h

where;

r is the radius of the cylinder, and h is the depth of the liquid.

Substituting the given values, we get:

V = π x (3.5 cm)² x 12.0 cm

= 1486.96 cm³

We need to convert the volume from cubic centimeters to cubic meters to use the density of the liquid in kilograms per cubic meter:

V = 1.48696 x 10⁻³ m^3

The mass of the liquid can be found using the formula:

mass = density x volume

Substituting the given values, we get:

mass = 900 kg/m³ x 1.48696 x 10⁻³ m³

= 1.33826 kg

Therefore, the reading shown on the digital balance is:

mass of empty cylinder + mass of liquid

mass of empty cylinder = 2.5/9.81

mass of empty cylinder = 0.2548 kg

reading shown on the digital balance =  0.2548 kg + 1.33826 kg

reading shown on the digital balance = 1.593 kg

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Answer:

b is the answer tennis ball

Explanation:

Given:

Diameter = 200 m

Radius, r = 200/2 = 100 m

Time taken, t = 30 seconds

Formula to be used:

Distance traveled, = circumference of circle = 2πr

Answer:

Putting all the values, we get

Distance traveled = 2πr

So, the distance traveled by Raju is 628.57 m.

Now, magnitude of the displacement,

At the end of 30 seconds, Raju will come to starting position or initial position, so displacement is zero.

Answer:

Different organelles play different roles in the cell — for instance, mitochondria generate energy from food molecules; lysosomes break down and recycle organelles and macromolecules; and the endoplasmic reticulum helps build membranes and transport proteins throughout the cell.

Explanation:

Hopefully this helped!

Answer: a

Explanation:

It is not recommended to fire a gun straight up into the air.

When a bullet is fired into the air, it will eventually come down and can pose a danger to people and property below. The bullet can still be lethal when it reaches the ground, especially if it lands on a hard surface or hits someone directly.

Additionally, firing a gun in a residential area can be illegal and can result in legal consequences. In general, guns should only be fired in designated shooting ranges or in self-defense situations where there is an immediate threat to life. It is important to handle firearms responsibly and follow all safety guidelines to prevent accidents and injuries.

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Answer:

Hazards during late childhood

Student 1 would have a power 467 W and student 2 would have a power of 433 W. The correct option is the fourth option - Student 1 would have 467 W, and Student 2 would have 433 W of power.

From the question,

We are to calculate the power each student would have to climb the flight of stairs.

Power can be calculated using the formula

\(P = \frac{F \times d}{t}\)

Where

P is Power

F is the force

d is the distance

and t is the time

NOTE: The weight of the students represent the force

F = 700 N

d = 4 m

t = 6 s

∴ \(P = \frac{700 \times 4}{6}\)

P = 467 W

F = 650 N

d = 4 m

t = 6 s

∴ \(P = \frac{650 \times 4}{6}\)

P = 433 W

Hence, Student 1 would have a power 467 W and student 2 would have a power of 433 W. The correct option is the fourth option - Student 1 would have 467 W, and Student 2 would have 433 W of power.

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Answer:nh

0.750 kg hammer is moving horizontally at 7.00 m/s when it strikes a nail and comes to rest after driving it 1.00 cm into a board.

Answer:

-76

Explanation:

f(-6) = -3*-6^2-4*-6+8

= -3*36+24+8

= -108+32

= -76

Answer:

The speed of sound varies with the material in which the waves travel.

Explanation:

knowledge and research

It can be concluded as per the given table that the speed of sound varies with the material in which the waves travel. The correct option is A.

Speed is the pace at which an object's position changes in any direction. The distance travelled in relation to the time it took to travel that distance is how speed is defined. Since speed simply has a direction and no magnitude, it is a scalar quantity.

It has a dimension of time-distance. As a result, the fundamental unit of time and the basic unit of distance are combined to form the SI unit of speed. Thus, the metre per second (m/s) is the SI unit of speed.

According to the given table, it can be inferred that the material in which the waves travel affects the speed of sound.

Thus, the correct option is A.

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The frequency is the inverse of time period of a wave and the time period of a wave is the time taken divided by number of cycles or wave.

A wave is a propagating dynamic disturbance of different quantities. Frequency is the number of waves which are passing by a specific point of time per second. And, time period is the time which the wave takes for one wave cycle to complete.

Frequency of a wave can be calculated by reciprocal of time taken.

Frequency of a wave = 1/ Time period

The time period is the time in which one wave.

9. The time period of the wave = Time taken/ Number of waves or cycles

Time period = 4/ 8

Time period = 1/2 or 0.5 sec

Frequency of a wave = 1/ T

Frequency of a wave = 1/ 0.5 = 2⁻¹

10. The time period of the pendulum's oscillations = 4/ 12 = 1/3 = 0.33 sec

The frequency of the pendulum's oscillations = 3.03 sec⁻¹

11. Speed of a wave = wavelength of a wave × frequency of the wave

Speed of a wave = 3 × 2

Speed of a wave = 6 meters per second

12. Wavelength of the wave will be the ratio of speed of the wave and frequency of the wave.

Wavelength (λ) = Speed of the wave (v)/ frequency of the wave (f)

Wavelength = 340/ 20

Wavelength = 170 meters

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Answer: the radius of the circular path is approximately 1637.58 meters.

Explanation:

The centripetal force acting on the airplane is provided by the component of the gravitational force that acts towards the center of the circular path. This component is given by:

F_c = m * g * tan(banking angle)

Where:

F_c is the centripetal force

m is the mass of the airplane

g is the acceleration due to gravity

tan(banking angle) is the tangent of the banking angle

Now, the centripetal force is also given by the formula:

F_c = (m * v^2) / r

Where:

v is the speed of the airplane

r is the radius of the circular path

Equating the two expressions for F_c, we get:

(m * g * tan(banking angle)) = (m * v^2) / r

Canceling out the mass (m) on both sides of the equation, we have:

g * tan(banking angle) = v^2 / r

Solving for r, we get:

r = (v^2) / (g * tan(banking angle))

Substituting the given values:

v = 400 km/h = 400,000 m/h

g = 9.8 m/s^2

banking angle = 20°

Converting the speed to m/s:

v = 400,000 m/h * (1/3600) h/s = 111.11 m/s

Converting the banking angle to radians:

banking angle = 20° * (π/180) rad/° = 0.3491 rad

Now, substituting the values into the formula:

r = (111.11^2) / (9.8 * tan(0.3491))

r ≈ 1637.58 meters

Therefore, the radius of the circular path is approximately 1637.58 meters.

Moonquakes and earthquakes are similar to each other because their occurrences are not controlled by tides

An earthquake is the phenomenon when two blocks of the earth suddenly slip past one another.

A moonquake is the lunar equivalent of an earthquake. it is also called as quake on the moon

Similarities between moonquakes and earthquake

They are similar in manner below:

Sunquakes and earthquakes

These earthquake-like events release energy in the form of waves that ripple along the Sun's surface.

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Answer:

The sound intensity at the position of the microphone is \(9.71\times10^{-4} W/m^{2}\)

Explanation

Sound intensity is given by the formula

\(I=\frac{P}{A}\)

Where \(I\) is the sound intensity, \(P\) is the power and \(A\) is the area.

Since the loudspeaker radiates sound in all directions, we have a spherical sound wave where the radius r is the distance of the microphone from the speaker.

∴ \(A\) is given by \(4\pi r^{2}\) where \(r\) is the radius

From the question, \(P\) = 33.0W, \(r\) = 52.0m

\(I=\frac{P}{A} = \frac{P}{4\pi r^{2} }\)

\(I = \frac{33.0}{4\pi \times (52.0)^{2} }\)

∴ \(I = 9.71\times10^{-4} W/m^{2}\)

Hence, the sound intensity at the position of the microphone is 9.71 × 10⁻⁴ W/m²

Mona's conclusion that convection is the main way that energy escapes from the water when there is no lid may or may not be a good conclusion, depending on the context and information provided.

Convection is a process of heat transfer that involves the movement of fluids (in this case, the water) due to differences in temperature. It occurs when warmer portions of the fluid rise and cooler portions sink, creating a circulating flow.

To determine if Mona's conclusion is valid, additional information is needed. Factors such as the presence of other heat transfer mechanisms (such as radiation or evaporation), the specific setup of the experiment, and the conditions under which the observations were made are essential.

If Mona's experiment only considered convection as the primary mechanism for energy escape and excluded other factors, her conclusion might be incomplete or inaccurate. To draw a more comprehensive conclusion, it is necessary to consider other potential heat transfer mechanisms and perform further investigations or provide additional supporting data.

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(a) The ball goes up to the height of 31.89 m. (b) The ball stays for 5.1 s in the air. (c) The acceleration due to gravity and wind resistance can affect the estimation.

Acceleration owing to gravity is the term used to describe the rate at which a body's velocity changes as a result of the earth's gravitational pull. In general, it is assumed that the acceleration caused by gravity is in the downward direction.

The acceleration caused by gravity has been calculated as, however as it changes from location to location, it may have an impact on the estimation.

You may have thought that the wind has no impact, but it can actually generate drag and even cause the ball to shift course.

Therefore, (a) The ball goes up to the height of 31.89 m. (b) The ball stays for 5.1 s in the air. (c) The acceleration due to gravity and wind resistance can affect the estimation.

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Robert Nozick opines that individuals own themselves and hence have a right to own property.

The term utilitarianism refers to the philosophical ideology that in the use of commodities, the best options is that which maximizes utility or satisfaction derived from the commodity.

In the position of Robert Nozick, utilitarianism means that individuals own themselves and hence have a right to own property.

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