What can you hold without touching it at all?

Explanation:

A. Up along the page

Using the law of the right hand

This is a what do you think question.

A cannonball of mass 20.0 kg is shot into the air at an angle of 45 degrees with respect to the horizontal. At the top of its ballistic trajectory, the cannonball suddenly explodes into two separate pieces, a smaller piece that is 1/3 the original mass, and a larger piece that is 2/3 the original mass. The two pieces fly apart horizontally, and the smaller piece ends up landing right back at the spot where the cannonball was originally launched, 11.0 seconds after it was launched, Therefore, the larger piece of mass (40/3) kg travels a horizontal distance of 500 m from the launch site.

At the top of its ballistic trajectory, the projectile would have only a horizontal velocity (vx) because the vertical velocity (vy) will be zero. Hence, we can use the formula for horizontal distance as: d = v x *t where d = horizontal distance travelled, vx = horizontal component of velocity, and t = time.

The initial horizontal component of the projectile's velocity, vx0 = v0 cos θ, where v0 is the initial velocity and θ is the angle at which the projectile is launched. Here, θ = 45°So, vx0 = v0 cos 45° = v0 / √2Also, the vertical component of velocity, vy0 = v0 sin θ, where v0 is the initial velocity and θ is the angle at which the projectile is launched. Here, θ = 45°So, vy0 = v0 sin 45° = v0 / √2. Now, the time taken to reach the top of the trajectory (where vy = 0) can be found from the formula: vy = vy0 - gt where g = 9.81 m/s² (acceleration due to gravity) and vy = 0vy0 = v0 sin 45° = v0 / √2

Therefore, t = vy0 / g = (v0 / √2) / 9.81 = v0 / (9.81√2)And the maximum height reached by the projectile is given by the formula: y = vy0t - (1/2)gt²y = (v0 / √2) × (v0 / (9.81√2)) - (1/2)×9.81×((v0 / (9.81√2)) ²)Simplifying the above equation,y = (v0² / (2×9.81)) - (v0² / (2×9.81))y = 0This implies that the projectile returns to the same level at which it was launched. Hence, the altitude of the launch site is irrelevant. Now, consider the motion of the larger piece of mass (2/3) × 20 kg = (40/3) kg. At the instant of the explosion, the larger piece moves off horizontally at the same horizontal velocity, vx = vx0, and at a vertical velocity, vy = 0. Therefore, the larger piece of mass (40/3) kg follows a parabolic trajectory under the influence of gravity with initial horizontal velocity, vx0 = v0 / √2, and initial vertical velocity, vy0 = 0. The horizontal range of the larger piece can be found using the formula:d = v x *t where d = horizontal distance travelled, vx = horizontal component of velocity, and t = time. The time of flight of the larger piece is the same as that of the smaller piece, t = 11.0 seconds.

Hence,d = vx0 × t = (v0 / √2) × 11.0 ... (1)Also, consider the motion of the smaller piece of mass (1/3) × 20 kg = (20/3) kg. At the instant of the explosion, the smaller piece moves off horizontally at the same horizontal velocity, vx = vx0, and at a vertical velocity, vy = 0. Therefore, the smaller piece of mass (20/3) kg follows a parabolic trajectory under the influence of gravity with initial horizontal velocity, vx0 = v0 / √2, and initial vertical velocity, vy0 = 0. The horizontal range of the smaller piece can also be found using the formula: d = v x *t where d = horizontal distance travelled, vx = horizontal component of velocity, and t = time. The time of flight of the smaller piece can be found using the formula: y = (1/2)gt²g = 9.81 m/s² (acceleration due to gravity), and y = 0 (since the smaller piece lands at the same level as the launch site). Therefore, t = √(2y/g) = √(2×0/9.81) = 0.

Hence, the smaller piece lands immediately after the explosion at the same spot where it was launched. Now, the required distance travelled by the larger piece (40/3) kg is given by substituting the value of vx0 from equation (1):d = (v0 / √2) × 11.0 = 500 m (approximately). Therefore, the larger piece of mass (40/3) kg travels a horizontal distance of 500 m from the launch site.

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Answer:

Explanation:

(I'm gonna simplify to Vf=Vs+at)

(I don't put the units in to the problem unless needed)

1. t=(Vf–Vs)/a to t=(0–30)/-4.0

2. a=(Vf–Vs)/t to a=(10–0)/6.0

(I'm assuming the that for number two they started at rest so it would be 0m/s for velocity start)

Given:

The angular displacement, θ=89.5°

Initial angular velocity, ω₀=47.8 rpm

Final angular velocity, ω=0 rad/s

To find:

The angular acceleration of the wheel.

Explanation:

The angular velocity can be converted to rad/s as,

The angle is converted into the radians as,

From the equation of motion,

Where α is the angular acceleration of the wheel.

On substituting the known values,

Final answer:

Thus the angular acceleration of the wheel is -8.01 rad/s²

Answer:

The answer is the third option.

Explanation:

The electrostatic force, Coulomb's force, is a force that depends on the inverse of the square distance, it is a non-contact force.

On the other hand, stretched spring is a contact force, it needs a contact external force.

Therefore, the answer is the third option.

I hope it helps you!

The stopper travels approximately 4.5 meters horizontally before hitting the ground.

We can use conservation of energy to solve this problem. At the highest point of the stopper's motion, all of its energy is in the form of potential energy, and at the lowest point (when it hits the ground), all of its energy is in the form of kinetic energy.

The potential energy of the stopper at the highest point is:

Ep = mgh

where m is the mass of the stopper, g is the acceleration due to gravity, and h is the height above the ground. Plugging in the values given in the problem, we get:

Ep = (0.150 kg) * (9.81 m/s²) * (2.3 m) ≈ 3.2 J

At the lowest point, all of the potential energy has been converted to kinetic energy:

Ek = (1/2) * mv²

where v is the speed of the stopper just before it hits the ground. Since the stopper is released from rest, we can use conservation of energy to equate the potential energy at the highest point to the kinetic energy just before hitting the ground:

Ep = Ek

mgh = (1/2) * mv²

Solving for v, we get:

v = √(2gh)

where h is the height from which the stopper was released. Plugging in the values given in the problem, we get:

v = √(2 * 9.81 m/s² * 2.3 m) ≈ 6.6 m/s

Now we can use the time it takes for the stopper to fall to the ground to calculate the horizontal distance it travels. The time is given by:

t = √(2h/g)

Plugging in the values given in the problem, we get:

t = √(2 * 2.3 m / 9.81 m/s²) ≈ 0.68 s

During this time, the stopper travels a horizontal distance given by:

d = vt

Plugging in the values we just calculated, we get:

d = (6.6 m/s) * (0.68 s) ≈ 4.5 m

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We must first determine the amount of force needed to lift the boxes against gravity. The weight of the boxes is calculated as follows: 30 boxes x 6 kg/box = 180 kg

Work = Force x Distance Work = 1765.8 N x 1.5 m Work = 2648.7 Joules Force = Weight x Gravitational Acceleration Force = 180 kg x 9.81 m/s2 Force = 1765.8 N

The total work required to raise thirty 6 kilogram boxes onto a 1.5 m high shelf is therefore 2648.7 Joules.

Hence, the gravitational pull between two objects grows as their respective masses do as well. The force of gravity between two objects is equal to their respective masses multiplied by two. To put it another way, the gravitational potential energy directly relates to how high an item is above the earth. Consequently, an item needs be elevated higher in order to enhance its gravitational potential energy. The gravitational potential energy increases with height.

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Given that the satelite's angular speed is given,The angular speed at the perihelion is : 9.2426 * 10⁻⁵ rad/s

Given data:

Satellite period = 8 * 10⁴ s

mass of planet (Wa)  = 7 * 10²⁴ kg

Radius of Aphelion ( Ra ) = 4.5 * 10⁷ m

satellite angular speed ( Vp )= 7.158 * 10⁻⁵ rad/s

Applying kepler's law

VpRp = VaRa

where:

Vp = ( Ra / Rp ) Va

and

Wp = Vp / Rp  = ( RA / Rp )² Wa  ---- ( 1 )

Note : Assuming a is distance from the center oto the end of the satelite

Rp = 2a - Ra  ---- ( 2 )

Next step : determine the value of a

applying the formula below

a = \((\frac{T\sqrt{Gmplanet} }{2\pi } )^{2/3}\) --- ( 3 )

where ; T = 8 * 10⁴ s,  G = 6.67 * 10⁻¹¹ ,  Mplanet = 7 * 10²⁴ kg

input values into ( 3 )

a = 42300747.03 m

Final step : determine the angula speed at perihelion

Back to equation ( 1 ) and ( 2 )

Wp = ( RA / 2a - Ra  )² Wa  

      = 9.2426 * 10⁻⁵ rad/s.

Hence we can conclude that Given that the satelite's angular speed is given,The angular speed at the perihelion is : 9.2426 * 10⁻⁵ rad/s

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Answer:

\( \green{ \sf \: \: 1.6 \: m {s}^{ - 2} \: \: \: is \: the \: correct \: answer}\)

Explanation:

\( \sf \: \huge{g } _{ \small{moon}} = \frac{ {\huge{g}}_{earth}}{6} \\ \\ \sf \implies \: \sf \: \huge{g } _{ \small{moon}} = \frac{ 9.8}{6} = 1.6 \: \: m {s}^{ - 2} \)

Answer:

To be neutral

Explanation:

Neutrons are electrically neutral but contribute to the mass of a nucleus to nearly the same extent as the protons. Neutrons can explain the phenomenon of isotopes (same atomic number with different atomic mass). The main role of neutrons is to reduce electrostatic repulsion inside the nucleus.

Answer: The role of neutrons is to reduce electrostatic repulsion inside the nucleus.

Explanation:

Because they are neutral, so they help hold the nucleus together.

Answer:

Technician A is correct

Explanation:

The statement "charging system is needed to keep the battery fully charged and recharge the battery after starting" is correct

from technician's B point of view, that the charging system supplies electrical current needs after engine start is incorrect.

In-fact the charging system is dedicated to the battery alone, the electrical needs of the system is gotten from the battery.

Answer:

6, 3, 2, 5, 4, 1

Explanation:

Let's describe them from smallest to largest. In fact the size order is not exact as there are exceptions.

An asteroid is a rocky body which lies in the asteroid belt between Mars and Jupiter. They are typically quite small object. The largest asteroid Ceres has been reclassified as a dwarf planet.

A moon is typically a rocky body which is in orbit around a planet. Some moons such as our Moon are quite large and are typically bigger than asteroid. Some moons can actually be smaller than some asteroids.

A planet is a nearly spherical body which is in orbit around the Sun. Planets are larger than moons.

A star is what planets orbit around. It is the source of light and heat. Our Sun is a star which is many times bigger than all of the planets.

A solar system is a star and all of its planets, asteroids, comets and other bodies. It is significantly bigger than a star.

A galaxy, such as our Milky Way Galaxy, is a collection of solar systems orbiting around a central core. Most galaxies have a supermassive black hole at their centres.

Galaxies also form clusters which are large scale structures.

The universe is everything. It contains billions of galaxies.

A ground conductor is a conductor that does not normally carry current, except during a fault (short circuit).

A conductor is someone who leads an orchestra, band, or choir. They provide musical leadership by interpreting the composer's music, making sure that all musicians are playing in time and at the correct level of expression. Conductors are also responsible for motivating the musicians, helping them to reach their full potential. They often have an encyclopedic knowledge of music, and can provide insight into the composer's intentions and the ensemble's interpretation. Conductors may also teach music theory, ear training, and sight-reading, as well as provide general guidance and discipline.

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Write each force in component form:

v ₁ : 50 N due east   →   (50 N) i

v ₂ : 80 N at N 45° E   →   (80 N) (cos(45°) i + sin(45°) j ) ≈ (56.5 N) (i + j )

The resultant force is the sum of these two vectors:

r = v ₁ + v ₂ ≈ (106.5 N) i + (56.5 N) j

Its magnitude is

|| r || = √[(106.5 N)² + (56.5 N)²] ≈ 121 N

and has direction θ such that

tan(θ) = (56.5 N) / (106.5 N)   →   θ ≈ 28.0°

i.e. a direction of about E 28.0° N. (Just to clear up any confusion, I mean 28.0° north of east, or 28.0° relative to the positive x-axis.)

If the efficiency of this power plant is 70 % of the maximum possible value, 862,920,000 J of heat must be thrown into the river.

The heat that must be dumped into the river will be calculated using the energy conservation law. The energy that goes into the power plant, minus the work done by the plant and the heat that goes into the river, is equal to the energy that is converted into electricity. Therefore, the energy conservation law is expressed as:

E in = E out or E in - E out = 0

The energy going into the power plant is 800,000 kW, and the work thrown into the river is 300 kW; therefore, the energy leaving the plant is (800,000 - 300) kW or 799,700 kW. The efficiency of the plant is 70 percent; therefore, 70 percent of the maximum energy that can be used is converted into electrical energy.

Since the maximum energy that can be used is equal to the energy going into the plant, the electrical energy produced is:

0.7 x 800,000 kW = 560,000 kW

The energy not converted into electrical energy is:

E in - 560,000 kW = 239,700 kW

To compute the heat to be thrown into the river, this amount must be converted into energy or heat:

239,700 kW x 3,600 s = 862,920,000 J

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Answer:

\(10\ \text{m/s}\)

Explanation:

\(s\) = Displacement = \(100\ \text{m}\)

\(t\) = Time taken = \(10\ \text{s}\)

Velocity is given by

\(v=\dfrac{s}{t}\\\Rightarrow v=\dfrac{100}{10}\\\Rightarrow v=10\ \text{m/s}\)

The person is able to run at a speed of \(10\ \text{m/s}\) in order to complete the race in the given time.

The elevator travels a distance of 1.5 meters

The distance traveled by elevator can be calculated by the simple work equation:

W = F × d

∴, d = W ÷ F

where W is the work done, F is the force exerted and d is the distance traveled.

Now we have work and force as the elevator does 15,000 J of work and exerts a force of 10,000 N

∴, d = 15,000 J ÷ 10,000 N

d = 1.5 meters

So the elevator travels a distance of 1.5 meters while taking people to the top floor of a building.

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Answer:

As newton's 1st Law states that " A body tends to be at rest or in motion until an external force is  applied "

Explanation:

so football will remains at rest until you kick it or stop it with your hands

Design a numbering system based on 0's and 1's, where each switch represents a binary digit (0 or 1) and combinations of switches represent numbers.

Two questions that need to be known to understand the title:

What defines an electric machine.

How can switches and bulbs be organized to perform mathematical operations like addition.

To design a numbering system based on 0's and 1's:

In a binary numbering system, each switch can represent a binary digit (0 or 1), and the number can be represented by the combination of these digits. For example, if we have four switches, we can represent numbers from 0 to 15 (2^4 - 1).

Adding the numbers 6 and 4 using switches and bulbs:

By representing 6 as 0110 and 4 as 0100 in binary, we can use four switches and bulbs to perform the addition. Each switch represents a binary digit, and the bulbs will display the result of the addition.

Using logical operations and gates to perform addition:

By using logical AND, OR, and XOR gates, we can manipulate the signals from the switches to perform binary addition.

Each gate takes input signals and produces an output based on a specific logical operation. By connecting these gates properly, we can create a circuit that adds the binary numbers and controls the bulbs to indicate the result.

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The force from the right side is 30 N and from the left side it is 20 N then the net force on the object is 10 N on the right side.

A strain is a phenomenon that can change an object's velocity in physics. A force can change or increase an excess object's velocity. It makes logical sense to use pushing or pulling to express force.

Being vector quantities, energies have both size and direction. Utilizing the SI system, it is calculated in newtons (N). The letter F stands for force.

As per the given data provided by the question,

The force on the object from the right side = 30 N

The force on the same object from the left side = 20 N

Then the net force on the object,

F(N) = 30 N - 20 N

F(N) = 10 N, on the right direction.

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In meteorology, a low pressure system is also known as a cyclone or a depression. It is characterized by a region of low atmospheric pressure relative to the surrounding areas.

In this type of system, the air moves upwards, which is represented by the motion of your palms during rotations.

The upward motion of air in a low pressure system is due to the fact that warm air rises. This occurs because the air in a low pressure system is less dense than the surrounding air, so it rises and cools as it ascends.

As the air cools, the water vapor in it condenses, forming clouds, which can then lead to precipitation.

The upward motion of air in a low pressure system can lead to unstable weather conditions, such as rain, thunderstorms, and tornadoes.

This is because the rising air can create instability and turbulence in the atmosphere, leading to the formation of clouds and storms.

Overall, the upward motion of air in a low pressure system is a key component of the meteorological phenomena that we experience in our everyday lives.

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Answer:

1. f=1T. where: f is the frequency of the wave in hertz. T is the period of the wave in seconds.

2. f=vλ where: f is the frequency of the wave in hertz. v is the velocity of the wave in meters per second. λ is the wavelength of the wave in meters

3. f=cλ

Explanation:

The distance covered by the boy before his little brother see him is 45 m.

The distance that can be covered by a boy travelling at 3 m/s for 15 seconds is calculated using the formula that relates speed, distance and time.

The formula relating distance, speed, and time is as follows;

The distance travelled can be obtained by a rearrangement of the equation above:

Considering the data provided;

The speed of the boy is 3 m/s

time required is 15 s

Distance covered by the boy = 3 m/s * 15 s

Distance covered by the boy = 45 m

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Answer:

Probably not my guy

Explanation:

The rate of change of energy of the water in the container is 450 Watts.

To determine the rate of change of energy of the water in the container, we need to consider the energy transfer through heating and mechanical work.

Heating:

The rate of heat transferred from the high temperature object to the water is given as 450 Watts. This represents the rate at which energy is being transferred to the water through heating.

Mechanical Work:

The motor outside the container produces 35 Newton-meters of torque and operates at 3600 rpm (revolutions per minute). To calculate the mechanical work done, we need to convert the rotational speed to radians per second.

First, we convert 3600 rpm to radians per second:

3600 rpm * (2π radians/minute) * (1/60 minute/second) = 376.99 radians/second (approx.)

Next, we calculate the mechanical work done by the motor:

Work = Torque * Angle

As the motor rotates, it performs work by rotating the shaft and propeller inside the water. However, without information about the angle of rotation, we cannot calculate the precise mechanical work done.

Based on the given information, the rate of change of energy of the water in the container is 450 Watts, representing the rate of heat transfer. However, without the angle of rotation, we cannot determine the exact contribution of mechanical work to the overall rate of energy change.

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The answer is D because this answer is D

Answer:

Instrumentos Para Medir La Temperatura

Termómetro de máxima y mínima:

Termómetro metálico:

Pirómetro:

Termohidrógrafo:

Answer:

6.32s

Explanation:

Given parameters:

Length of track and distance covered  = 200m

Acceleration  = 10m/s²

Unknown:

Time taken to cover the track  = ?

Solution:

To solve this problem, we apply one of the motion equations as shown below:

       S  = ut + \(\frac{1}{2}\) at²  

S is the distance covered

t is the time taken

a the acceleration

u is the initial velocity

The initial velocity of Superman is 0;

 So;

     S  =  \(\frac{1}{2}\) at²  

        200  =  \(\frac{1}{2}\) x 10 x t²  

          200  = 5t²  

            t²  = 40

            t  = 6.32s

Answer:

The train's acceleration is 4.5 m/s²

Explanation:

The train's speed increased by 45 m/s after 10 seconds, which means that it's speed increased by 4.5 m/s each second, or rather 4.5m/s²