A circular hoop of mass m, radius r, and infinitesimal thickness rolls without slipping down a ramp inclined at an angle θ with the horizontal.
A. What is the acceleration αα of the center of the hoop?
B. What is the minimum coefficient of (static) friction μminμmin needed for the hoop to roll without slipping?

\(\\ \sf\Rrightarrow P=VI\)

\(\\ \sf\Rrightarrow 120=48I\)

\(\\ \sf\Rrightarrow I=120/48\)

\(\\ \sf\Rrightarrow I=2.5A\)

Answer:

Two objects that are the same volume will displace the same amount of water even if they have different masses.

Answer: 115 N

Explanation:

In this case, the ball has a weight of 15 N (force due to gravity) acting on it and the cannon is shooting it with a force of 100 N.

To find the net force on the ball, we add the forces acting on it.

Net force = force due to gravity + force due to the cannon

Net force = 15 N + 100 N

Net force = 115 N

So, the net force on the ball will be 115 N. ✅

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The main difference between transverse waves and compression waves is the direction of the particle oscillation relative to the direction of wave propagation. The other differences are as follows:

Transverse waves are waves in which the particles of the medium oscillate perpendicular to the direction of wave propagation. These waves exhibit a characteristic up-and-down motion, like the motion of a rope when it is shaken up and down. Examples of transverse waves include light waves, water waves, and seismic S-waves. On the other hand, compression waves, also known as longitudinal waves, are waves in which the particles of the medium oscillate parallel to the direction of wave propagation. These waves exhibit a characteristic back-and-forth motion, like the motion of a slinky when it is compressed and expanded. Examples of compression waves include sound waves and seismic P-waves. In transverse waves, the particle oscillation is perpendicular to the direction of wave propagation, whereas in compression waves, the particle oscillation is parallel to the direction of wave propagation.

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According to Wien's law, the color of the sun should be a bright white or slightly bluish-white. This is because Wien's law states that the peak wavelength of the sun's radiation is in the ultraviolet region, which corresponds to a color on the blue end of the visible spectrum.

However, since the sun emits radiation across a broad range of wavelengths, it appears as a bright white ball in the sky to the human eye.

Based on Wien's Law, the Sun's color is primarily white. Wien's Law helps determine the peak wavelength of radiation emitted by a black body, such as the Sun, based on its temperature. The Sun's surface temperature is around 5,500°C (9,932°F), which corresponds to a peak wavelength in the visible light spectrum, causing it to appear white to the human eye.

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In what order does the light from a microscope pass through the lenses necessary to create a magnified, real image of a specimen is as follow:

The light from a microscope passes through the lenses in the following order to create a magnified, real image of a specimen.

1. Illuminator: The light source or the illuminator is the first lens through which light passes, to illuminate the object being observed.

2. Condenser lens: After passing through the illuminator, the light passes through the condenser lens which helps to focus the light onto the object.

3. Objective lens: The objective lens is the primary lens of a microscope, which is positioned near the specimen, and through which light passes and helps to magnify the image of the specimen.

4. Eyepiece lens: The eyepiece lens is the second lens in the system, through which light passes after leaving the objective lens. It further magnifies the image formed by the objective lens and helps to make the image visible to the viewer.

Therefore, the order of lenses through which light passes to create a magnified, real image of a specimen in a microscope is Illuminator, Condenser lens, Objective lens, and Eyepiece lens.

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Heat is a form of energy that is transferred between objects or systems due to a temperature difference, causing changes in their thermal states or temperature distributions.

Given, heat obtained by burning gasoline,

Q= 10000 J Mechanical work done,

W= 2000 J Heat of combustion of gasoline,

Lc = 5.0 * 104 J/g.

(a) Thermal efficiency of this engine is calculated by the formula,

ηth=Work done/Heat suppliedηth = 2000/10000 = 0.2 or 20%

Therefore, the thermal efficiency of this engine is 20%.(b) Amount of heat discarded in each cycle can be calculated by using the formula,

Q discarded = Q supplied - W done.

Q supplied = Heat of combustion of gasoline × Mass of gasoline burnt

= 5.0 × 104 × (10000/5.0 × 107) = 10 J

Hence, the amount of heat discarded in each cycle is 10 J.

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Answer:

Step-up transformers are used at power stations to produce the very high voltages needed to transmit electricity through the National Grid power lines. These high voltages are too dangerous to use in the home, so step-down transformers are used locally to reduce the voltage to safe levels.

Transform plate tectonic boundaries slide/move past each other, rubbing along the edges causing earthquakes, tsunami, landslides

An earthquake is the shaking of the surface of the Earth resulting from a sudden release of energy in the Earth's lithosphere that creates seismic waves.

The answer is c is because when tectonic plates are rubbing against each other that’s how an earthquake is formed.

another reason the answer is C is because when the tectonic plates are moving together it can cause the land to slide.

the last reason the answer is C is because when the tectonic plates in the ocean move it can cause a tsunami.

Hence transform plate tectonic boundaries slide/move past each other, rubbing along the edges causing earthquakes, tsunami, landslides

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Answer:

buying and selling goods and services. and exchange account

Explanation:

:)

Answer:

when money is used to intermediate the exchange of goods and services

Answer:

Drawing the triangle:

H / x = tan 52.2 = 1.29

H / (4.6 - x) = tan 28.8 = .550

H = 1.29 x

H = .55 * 4.6 - .55 x

1.84 x = 2.53        combining equations

x = 1.38

4.6 - 1.38 = 3.22

Total base of triangle = 1.38 + 3.22 = 4.6

H / x = tan 52,2 = 1.29

H = 1.29 * 1.38 = 1.78 height of triangle

Check:

1.78 / 3.22 = tan 28.9    

This agrees with the given value of 28.8

The Biot-Savart Law can be used to calculate the magnetic field near a straight wire that can carry a limited amount of current. The following mathematical expression can be used to describe the magnetic field near a straight wire that carries current:​

The area around a magnet where magnetism has an effect is called the magnetic field. We describe the distribution of the magnetic force within and around a magnetic object by utilizing the magnetic field as a tool.

The equation describing the maximum EMF induced in a rotating planar coil (M = 75.0 V, N = 260turns, angular speed = 89 rad/s, magnetic field B = 0.3T) can be connected to the coil's area, which is A=a2 because it is a square of the side length.

The side length can be derived from this:

√∈M/NBω

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Answer:

Isn't it technically your brain? Because it's always in your skull and when you're younger you have cracks in your skull but as you grow, your skull fossilizes to mend those cracks. IT FOSSILIZES!

Explanation:

B. The velocity of the particle with respect to the acceleration is √x + 4.

Velocity is the rate of change of displacement with time.

The velocity of the particle with respect to the acceleration of the particle is calculated as follows;

vf = v₀ + at

where;

vf(x) = 2 + (√x + 2)

vf(x) = √x + 2 + 2

vf(x) = √x + 4

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Answer:

7657

Explanation:

b. FALSE

If the velocity of particle is high then they will collide with each other with a greater force because their momentum will be high

force is a push or pull on a body .

Momentum is the product of mass and velocity,

More the velocity, higher will be the momentum.

since force is  directly proportional to rate of change of momentum

F = Δp/Δt

so on when bodies having higher velocities collide their rate of change of momentum is higher hence more will be the force

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Answer:

When the temperature increases

Explanation:

The value of the normal force on the object of mass 50 kg such that it experiences a friction force of 5 Newton is equal to 490 Newton.

Friction force is a force that opposes the force. It acts in the direction opposite to the intention of the motion of the object ,it is a non conservative force in nature.

Normal force is a type of force that's perpendicular to the surface of the object when it is placed in contact with another surface the SI unit of normal force is the same as force in general that is Newton.

Given:

Surface area of the sphere = 6 u

Mass of the sphere = 50 kg

First we use the mass value of the sphere, we will calculate the value of the weight of a sphere so that we know force against which against which the normal force will be acting.

Weight of the sphere = 50 × 9.8

Weight of the sphere = 490 Newton

Now since the normal force is being used to balance of the weight of the sphere we can say that the value of the normal force will be equal to 490 Newton.

Therefore, The value of the normal force on the object of mass that it experiences a friction force of 5 Newton is equal to 490 Newton.

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Heat is transferred from the sun-warmed surface of the earth to the cooler overlying troposphere via conduction.

Conduction, convection, latent heating, and water phase transitions all help to carry heat from the Earth's surface, which has been warmed by the Sun, to the cooler troposphere above.

Latent heat flux is the worldwide transfer of latent heat energy via water and air currents. Here, we demonstrate how air circulation transports latent heat energy horizontally to cooler regions, where it condenses into rain or is deposited as snow, releasing the heat energy that was previously trapped there.

When air is heated from below by sunshine or by coming into contact with a warmer land or sea surface, convection occurs and the air below becomes less dense than the air above.

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The speed of transverse waves on the steel piano wire is approximately 403.12 m/s.

To find the speed of transverse waves on the steel piano wire, we can use the equation v = √(T/μ), where v is the speed of the wave, T is the tension, and μ is the linear mass density.

The linear mass density (μ) can be calculated by dividing the mass of the wire (5.00 g) by its length (1.250 m).

μ = mass/length = 5.00 g / 1.250 m = 4.00 g/m = 0.00400 kg/m.

Now, we can substitute the values into the equation v = √(T/μ):

v = √(650.0 N / 0.00400 kg/m) = √(162500 N/kg) = 403.12 m/s.

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Answer:

everything would die

Explanation:

Answer:

51 miles/hour

Explanation:

Talia is on a road trip with some friends. in the first 2 hours, they travel 100 miles. then they hit traffic and go only 30 miles in the next hour. the last hour of their trip, they drive 75 miles. calculate the average speed of talia’s car during the trip. give your answer to the nearest whole number.

The average speed would be 51 miles/hour.

The average speed of a moving object is defined as the total distance traveled relative to the total time taken fro the journey. Mathematically, it is given as:

  total distance traveled/total time taken.

In this case;

Total distance traveled = 100 + 30 + 75 = 205 miles

Total time taken = 2 + 1 + 1 = 4 hours

Therefore;

Average speed = 205/4 = 51.25 miles/hour

To the nearest whole number = 51 miles/hour

Answer:

Explanation:

percentage yield

The actual yield of a reaction can be compared with the maximum theoretical yield to calculate the percent yield of a reaction.

The theoretical yield is the maximum amount of product that could be obtained from the reaction under ideal conditions. The actual yield is the actual amount of product that was obtained from the reaction.

The actual yield of a reaction can be compared with the maximum theoretical yield to calculate the percent yield of a reaction. The percent yield is a measure of the efficiency of a chemical reaction and is calculated as follows:
Percent yield = (actual yield / theoretical yield) × 100

By comparing the two, the percent yield gives an indication of how well the reaction actually performed in comparison to the ideal conditions. A high percent yield indicates that the reaction was efficient and close to ideal conditions, while a low percent yield indicates that the reaction was less efficient and not close to ideal conditions.

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Given :- A resistor of 150 ohm, hence Resistance (R) = 150 ohm

Potential Difference (v) = 24 V

Current (I) = ?

V = IR

24 = I × 150

I = 24/150

I = 0.16 ampere

hope it helps!

Answer:

It says about the motion and the graph of the object is stationary, basically travelling at the same speed at any time of the graph. It will never change.

Explanation:

To draw a diagram:

1. Draw an object and represent the speed as stationary and constant at any time.

A scientific law is an established principle that explains a phenomenon or behavior in the natural world. It is a concise statement that summarizes the results of many observations and experiments and is widely accepted as true because it has been confirmed over and over again.

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Radiogenic heat may be described due to the type of warmth that is released when radioactive isotopes disintegrate. Consequently, we say that, the thermal strength is launched by means of the nuclear disintegration of the radioactive isotopes.

Radio active heating refers to the power dissipated within the interiors of planets, asteroids, satellites, as a consequence of radioactive decay of radioactive isotopes. Radioactive isotopes are characterised by their decay energies and their half lives.

Around 50% of Earth's inner warmness originates from the radioactive decay. Four radioactive isotopes are chargeable for the general public of radiogenic warmness because of their enrichment relative to different radioactive isotopes uranium-238, uranium-235, thorium-232 and potassium-40.

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Given the production rules below, is the plus operator (+) left-associative, right-associative, or neither a parse tree of it is in the explanation part below.

In the provided production rules, the addition operator (+) is left-associative.

Consider the statement "1 + 2 + 3" to show this.

This sentence's parse tree is as follows:

The addition operator's left-associativity is shown in this parse tree. The operands 1 and 2 are combined by the leftmost plus operator, and the resultant total is merged with the operand 3 by another plus operator. This depicts the assessment of the statement "1 + 2 + 3" from left to right.

If the plus operator were right-associative, the parse tree would be different, with the rightmost plus operator first combining operands 2 and 3, and then combining the resultant sum with operand 1.

Thus, the parse tree is attached below as image.

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Answer:  true

Explanation:

Answer:

the answer is true answer true

What are the following statements?