Earth's crust is made up of large and small plates that are in slow, constant motion, driven by convection curents in Earth's mantle. Scientists who study Earth have consistently observed that most earthquakes and volcanoes
occur where plates meet Which of the following best describes or categorizes plate tectonics?
A scientific law
B scientific theory
C hypothesis
D Aprediction

PLEASEEEE HELPP

(1) The angular velocity at position 1 of a uniform rod rotating freely around an axis can be determined.

(2) The velocity of the center of mass at position 2.

(1) To determine the angular velocity at position 1, we need to consider the conservation of angular momentum. Since the rod is rotating freely, there are no external torques acting on it.

The initial angular momentum is zero, and at position 1, the angular momentum is given by L = Iω, where I is the moment of inertia of the rod and ω is the angular velocity. By substituting the values of mass and length of the rod into the formula for moment of inertia, we can solve for ω.

(2) To calculate the velocity of the center of mass at position 2, relative to position 1 and at an angle theta, we can use the concept of angular velocity and linear velocity. The linear velocity of the center of mass is given by v = ωr, where ω is the angular velocity and r is the distance between the center of mass and the axis of rotation. By considering the given angle theta and the length of the rod, we can determine the distance r.

Substituting the value of ω calculated in part (1) into the formula, we can find the velocity of the center of mass at position 2, relative to position 1 and at angle theta.

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Answer:

It is because gasses, liquids, and plasma are always changing shape they are named and classified as ‘fluid’.

Given:Threshold Voltage, Vth = 1VOn-State Resistance, ROn = 0 ΩN-channel MOSFET has characteristics:Vth = 1 VnCox = 200 A/V²(W/L) = 20I = ?1) In this conditionVGS = 2 VVDS = 2 VVBS = 0 VIn saturation, VGS > Vth and VDS ≥ VGS - VthHere, VGS - Vth = 1 VSo, VDS = 2 V ≥ 1 VThe MOSFET is in saturation mode.In saturation mode.

The drain current is given by the equation:I = (1/2) x nCox x (W/L) x (VGS - Vth)²I = (1/2) x 200 x 20 x (2 - 1)²I = 200 µA2) In this conditionVGS = 2 VVDS = 0.5 VVBS = 0 VIn the ohmic region, VDS < VGS - VthHere, VGS - Vth = 1 VSo, VDS = 0.5 V < 1 VThe MOSFET is in ohmic mode.In ohmic mode, the drain current is given by the equation:I = nCox x (W/L) x (VGS - Vth - VDS/2) x VDSI = 200 x 20 x (2 - 1 - 0.5/2) x 0.5I = 875 µAAnswer:The drain current for the given conditions are:1) I = 200 µA2) I = 875 µA

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\(\\ \tt\hookrightarrow Frequency (\nu)=\dfrac{1}{T}\)

\(\\ \tt\hookrightarrow \nu=\dfrac{1}{0.002}\)

\(\\ \tt\hookrightarrow \nu=500Hz\)

Answer:

1)  10 kg-m/s

2)  2 kg

3)  20 m/s

Explanation:

The momentum of an object can be calculated using the equation:

\(\large\boxed{p=mv}\)

where:

\(\hrulefill\)

For this question we need to find the momentum of a bowling ball whose mass is 4.0 kg is rolling at a rate of 2.5 m/s.

Given values:

Substitute the given values into the momentum formula and solve for p:

\(p=4.0\;\text{kg} \cdot 2.5\;\text{m/s}\)

\(p=10\;\text{kg m/s}\)

Therefore, the momentum of the bowling ball is 10 kg-m/s.

\(\hrulefill\)

For this question we need to find the mass of a skateboard rolling at a velocity of 3.0 m/s with a momentum of 6.0 kg-m/s.

Given values:

As we want to find mass, rearrange the momentum formula to isolate m:

\(\large\boxed{m=\dfrac{p}{v}}\)

Substitute the given values into the formula and solve for m:

\(m=\dfrac{6.0\; \text{kg m/s}}{3.0\; \text{m/s}}\)

\(m=2\;\text{kg}\)

Therefore, the mass of the skateboard is 2 kg.

\(\hrulefill\)

For this question we need to find the velocity of a baseball with a mass of 0.5 kg and a momentum of 10 kg-m/s.

Given values:

As we want to find velocity, rearrange the momentum formula to isolate v:

\(\large\boxed{v=\dfrac{p}{m}}\)

Substitute the given values into the formula and solve for v:

\(v=\dfrac{10\; \text{kg m/s}}{0.5\; \text{kg}}\)

\(v=20\;\text{m/s}\)

Therefore, the velocity of the baseball is 20 m/s.

**Pressure is not a vector quantity** because it does not have both magnitude and direction. While pressure involves the application of a force on a surface, the resulting pressure itself is solely determined by the magnitude of the force and the area over which it is distributed.

Pressure is defined as the force per unit area, and it is represented by a scalar value. Scalars only have magnitude and no direction. In contrast, vector quantities, such as force and velocity, have both magnitude and direction. Thus, pressure lacks a directional component and is considered a scalar quantity.

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The distance from the observer to the rocket is increasing at a rate of 1000 mph.

To find the rate at which the distance from the observer to the rocket is increasing, we can use the concept of relative velocity. Since the rocket is traveling straight up at a constant velocity of 750 mph and the observer is stationary, the only motion that affects the distance between them is the vertical motion of the rocket.

At the moment when the rocket is 2 miles high, we can consider a right-angled triangle formed by the observer, the rocket, and the height of the rocket. The distance from the observer to the rocket forms the hypotenuse of this triangle, and the height of the rocket is one of the perpendicular sides. We can use the Pythagorean theorem to relate these quantities:

(distance from observer to rocket)² = (height of rocket)² + (horizontal distance)²

Let's call the distance from the observer to the rocket D, the height of the rocket H, and the horizontal distance X. We are given that D = 1.5 miles and H = 2 miles. We need to find the rate at which D is changing when H is 2 miles.

Differentiating both sides of the equation with respect to time, we get:

2 * D * dD/dt = 2 * H * dH/dt + 2 * X * dX/dt

Since the observer is stationary, the horizontal distance X remains constant. Also, the rocket is traveling straight up, so dX/dt = 0. Therefore, the equation simplifies to:

D * dD/dt = H * dH/dt

Plugging in the known values, we have:

1.5 * dD/dt = 2 * dH/dt

Now, solving for dD/dt, we find:

dD/dt = (2 * dH/dt) / 1.5

Since the rocket is traveling at a constant velocity of 750 mph, the rate at which the height of the rocket is changing, dH/dt, is also 750 mph. Substituting this value, we get:

dD/dt = (2 * 750 mph) / 1.5

dD/dt = 1500 mph / 1.5

dD/dt = 1000 mph

Therefore, the distance from the observer to the rocket is increasing at a rate of 1000 mph.

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Answer:

scalar quantity

Explanation:

scalar quantity does not need any direction

Answer:

cần cung cấp 70 độ vì nước sôi ở 100°C

Explanation:

Answer:

it's 24

Explanation:

I took the test and got 100 %

Answer:

24

Explanation:

Answer:

1. heating

2. entertainment

3. cooling

4.educational purpose

5.comfort

Answer: 63.43 m

Explanation:

Given

Car lands 68.38 m away from the base of the garage

Stuntman drove the car with speed \(u=19\ m/s\)

Since there is no acceleration in the horizontal direction, so there is no change in velocity

\(\Rightarrow 68.38=19\times t\\\Rightarrow t=3.598\ s\)

time taken to cover 68.38 m is 3.598 s

In this time car travels a vertical distance of h

Such that we can write

\(\Rightarrow h=u_vt+\frac{1}{2}at^2\\\\\Rightarrow h=\frac{1}{2}gt^2\\\\\Rightarrow h=0.5\times 9.8\times (3.598)^2=63.43\ m\)

Answer:

Explanation:

The weight of a body is defined as the force with which it is attracted towards the centre of a planet. A spring balance measures it. It's unit is Newton ( N ) in the SI system and dyne in the CGS system.

Hope I helped!

Best regards!

Weight is force.

The CGS unit of force is the dyne.

The SI unit of force is the Newton.

(a) The recoil or backward velocity of the gun is 8 m/s.

(b) The bullet cannot penetrate the plank of the wood completely.

The given parameters include;

(a) The backward or recoil velocity of the gun is calculated by applying the principle of conservation of linear momentum.

m₁u₁  + m₂u₂ = 0

m₂u₂ = -m₁u₁

\(u_2 = -\frac{m_1u_1}{m_2} \\\\u_2 = - \frac{0.1 \times 400}{5} \\\\u_2 = -8 \ m/s\)

Thus, the recoil or backward velocity of the gun is 8 m/s.

(b) determine if the bullet can penetrate the plank of the wood completely

the acceleration of the bullet is calculated as;

v² = u₁² + 2as

2as = v² - u²

\(a = \frac{v^2 -u_1^2}{2s} \\\\a = \frac{(266.67)^2 -(400)^2}{2\times 0.04} = -1.111 \times 10^6 \ m/s^2\)

Finally, determine the distance traveled by the bullet when it comes to a complete stop, that is the final velocity = 0

\(v_f^2 = v^2 + 2ad\\\\2ad = v_f^2 - v^2\\\\d = \frac{v_f^2 - v^2}{2a} \\\\d = \frac{(0) - (266.67)^2}{2(-1.111\times 10^6)} \\\\d = 0.032 \ m\)

d = 3.2 cm

The total distance traveled by the bullet inside the plank = 4 cm + 3.2 cm = 7.2 cm

Therefore, the bullet cannot penetrate the plank completely.

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Answer:

it is difficult

my best answer would be a. 6

hope its right!!

===========================================

Explanation:

The half-life formula is

y = A*(1/2)^(x/H)

where A is the starting amount, H is the half-life, x is the time value and y is the amount after x units of time have passed.

I'll express the x and H values in terms of millions of years. So for example, when we say H = 500, then that really refers to 500 million years.

----------

In this case, we know that,

Let's use those values to solve for x. We'll need logs to cut the exponents down from the trees.

y = A*(1/2)^(x/H)

3 = 192*(1/2)^(x/500)

3/192 = (0.5)^(x/500)

0.015625 = (0.5)^(x/500)

log(0.015625) = log( (0.5)^(x/500) )

log(0.015625) = (x/500)*log(0.5)

(x/500)*log(0.5) = log(0.015625)

x = 500*log(0.015625)/log(0.5)

x = 3,000

Keep in mind that x is in millions of years. So saying x = 3,000 means 3,000 million years. This translates to 3,000*10^6 = 3,000,000,000 = 3 billion years.

It will take about 3 billion years for the 192 atoms to decay to only 3 atoms.

The amount of half-lives this occurs is x/H = (3,000)/500 = 6

So the time span of 3 billion years is the same as 6 half-lives when each half-life is 500 million years long.

When an electromagnet is placed nearby, the paper clips move towards it due to magnetic domains within the paper clips aligning with the magnetic field.

Magnetic domains are tiny regions within a material's atoms where the magnetic poles are aligned in the same direction, creating a magnetic field. As the electromagnet produces its own magnetic field, the magnetic domains within the paper clips become attracted to the electromagnet’s field, causing them to move towards it. The paper clips do not become magnetized themselves, as the magnetic field created by the electromagnet is too weak to cause permanent alignment of the magnetic domains within the paper clips.

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Answer:

C. Time

Explanation:

Answer: time because i am so good

Explanation:

Observatories from the Earth's surface can view a range of radiation types such as visible light, ultraviolet light, and infrared light. These observatories can also detect radio waves, microwaves, and X-rays.

However, these wavelengths are often absorbed by the Earth's atmosphere before they can reach the surface. From space, we can observe a range of wavelengths such as gamma rays, X-rays, and ultraviolet radiation.

These wavelengths are blocked by the Earth's atmosphere, so it is essential to have observatories in space to detect them. We know that elements are present inside a star by analyzing its spectrum. When the light from a star is passed through a prism, it produces a spectrum that has dark lines on a colored background.

These dark lines are called absorption lines and are produced when the light from the star passes through the star's atmosphere. The absorption lines are produced by the elements present in the star's atmosphere. Each element produces a unique pattern of absorption lines, which can be used to determine the elements present in the star.

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We now define a quantity the sum of the potential energy and the kinetic energy is called the total mechanical energy of our system.

The energy a body has as a result of movement or position is known as mechanical energy. The energy that is released by falling from a particular position is a good example. As the literal driving force of the world around us, whether it be natural or man-made, mechanical energy is one of the fundamentals studied in mechanical engineering. In joules, mechanical energy is measured.

E = K + U.

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Answer:

Explanation:

It transfers from mechanical energy, to electrical energy to chemical energy. The energy transformation in an electromagnet is from chemical to electrical to electromagnetic waves. The north poles of two different magnets will attract each other.

Answer:

step 1 the initial velocity of the car is u = 30 m/s.the final velocity of the car is v = 0 m/s. the time taken by

Answer: Answer Is B) The magnitude of both forces will decrease as the magnitude of the items (mass for gravity, charge for electrical) increases.

Explanation:

U WELL COM

Answer:

The doctors could see if her cells are getting the molecules they need from food and air

Explanation:

The doctors could see if her cells are getting the molecules they need from food and air. Doing so allows the doctors a general overview of how well her body's biological systems are performing since the basic necessities of the human system are food and oxygen. Therefore if the body is receiving both food and oxygen properly and distributing it properly and efficiently as well without any problems then the most likely outcome is that she is healthy enough to perform her tasks in the submarine under more pressure.

Answer:

The doctors could see if her cells are getting the molecules they need from food and air

Explanation:

Answer and Explanation:

The computation is shown below:

The ac frequency in the United States is 60 Hz

The ac frequency in Europe is 50 Hz

So,

Time for 25 spark in United stated is 25 ÷ 60 s

Time for 25 spark in Europe is 25 ÷ 50 s

Now

Tape length in United States is

= 0.5 × 9.8 × (25 ÷ 60)^2

= 0.85 m

= 85 cm

And,  

Tape length in europe is

= 0.5 × 9.8 × (25 ÷ 50)^2

= 1.225 m

= 122.5 cm

So, As it can be seen that

= 122.5 cm - 85 cm

=  37.5 cm

Europe has 37.5 cm more than in the United States

The football will land approximately 30.7 meters away.

To determine the distance the football lands, we can use the principles of projectile motion. The initial velocity of the football can be split into horizontal and vertical components. The horizontal component remains constant throughout the motion, while the vertical component is affected by gravity.

Using the given information, we can calculate the time of flight using the vertical component. The time of flight is the total time the football remains in the air. Next, we can calculate the horizontal distance traveled by multiplying the time of flight by the horizontal component of the velocity.

In this case, the initial velocity of the football is 18 m/s, and the angle of 28 degrees. By decomposing the velocity, we find that the horizontal component is 18 * cos(28) ≈ 15.96 m/s.

To calculate the time of flight, we use the vertical component of the velocity, which is 18 * sin(28) ≈ 8.12 m/s. We can use the equation t = 2 * (vertical component) / g, where g is the acceleration due to gravity (approximately 9.8 m/s²). Substituting the values, we find t ≈ 1.67 seconds.

Finally, we can calculate the horizontal distance traveled by multiplying the time of flight by the horizontal component of the velocity: distance = time * horizontal component = 1.67 * 15.96 ≈ 30.7 meters.

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Answer:

First one: False. Second one: decrease. Third one: decreased

Explanation:

For the first one, potato chips will make the floor more slippery than just regular tile. Second one, if the force holding the 2 things together decreases, the friction will decrease as well. For the third one, if water is over the floor, it makes it even more slippery.

Hope this helps!

Answer:

1:False 2:Decrease 3:Decrease

When burning fossil fuels and biomass, they spark a combustive reaction; meaning the fuel transpires with oxygen existing in the atmosphere to generate energy such as heat, sight, and sound.

Nonrenewable power sources are those that do not replenish, comprising coal, oil, as well as natural gas.

What lends itself to easier use of biomass for energy purposes is the emergence of more efficient and cost-effective approaches for transforming it into biofuels.

The optimal renewable power sources to implement in a location depend on certain specifics, including the amount of this energy source, its capacity for setup, and price.

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