Define 1 kg of mass as international standard​

Answer:

A. 9.3m/s

Explanation:

Study Island.

Answer:

Design 2

Explanation:

I had this same question

My answer:

"Design 2 is the well-designed one, because the air molecules are the most compact and could protect the individual better than 1,3,and no air bag."

Answer:

the third class lever makes our work easier as effort is located at the middle, load at first and fore is applied at the buttom. which helps in accelerating work.

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Answer:

value of x=35°

y=72.5°

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Answer:

30 m\ s Ans .....

Explanation:

Data:

f = 10 Hz

w = 3 m

v = ?

Formula:

v = fw

Solution:

v = ( 10)(3)

v = 30 m\ s Ans ........

1. The average speed of Luis over the 60 s is 1.33 m/s

2. The average velocity of Luis over the 60 s is zero.  

1. The average speed can be calculated with the following equation:

\( S = \frac{d}{t} \)

Where:

d: is the total distance traveled

t: is the total time = 60 s

The total distance can be calculated by the sum of the distance traveled to the truck (40 m) and the distance traveled to his home (the same 40 m), as follows:

\( d = 40 m + 40 m = 80 m \)

So, the average speed is:

\( S = \frac{d}{t} = \frac{80 m}{60 s} = 1.33 m/s \)

Hence, Luis's average speed over the 60 s is 1.33 m/s.

2. Now, the average velocity is a vector given by:

\(v = \frac{\Delta x}{\Delta t} = \frac{x_{f} - x_{i}}{t}\)

Where:

\(x_{f}\): is the final distance traveled (the way to his home) = 40 m

\(x_{i}\): is the initial distance traveled (the way to his truck) = 40 m

Δt: is the total time = t = 60 s

Given that Luis in his journey, returns to the same starting point (his house), the total displacement is zero, and so the average velocity is also zero:                              

\(v = \frac{x_{f} - x_{i}}{t} = \frac{40 m - 40 m}{60 s} = 0\)

Therefore, Luis's average velocity over the 60 s is zero.  

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As shown in the figure below, Luis rushes 40 m toward his truck. He notices he forgot his shoes and returns back to his house. His total travel time is 60 s.

Answer:

What is Luis’s average velocity over the 60 s period?

Answer: 0 m/s

What is Luis’s average speed over the 60 s period?

Answer: 1.33  m/s

The time cat will take to run 5.5km is 55.89 minutes.

according to given details,

distance = 13.1m

time = 8 s

speed = ?

distance (b) = 5.5km = 5500m

time = ?

speed = ?

So by using formula,

speed = distance / time

speed = 13.1m/8s

speed = 1.64 m/s

As now we have speed using same formula

s = d / t

t = d / s

t = 5500m / 1.64 m/s

t = 3,353.65 sec

t = 55.89 minutes

Speed is calculated as distance times speed. You need to be aware of the units for distance and time in order to calculate the units for speed. The units in this example will be metres per second (m/s), since the distance is measured in metres (m) and the time is measured in seconds (s).

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Answer:

a. Vf = 39.24 [m/s]

b. Vf = 31.24 [m/s]

c. Vf = 47.24 [m/s].

Explanation:

To solve this problem we can use the following equation of kinematics. We have to keep in mind that the gravitational acceleration acts downwards, therefore when the rock falls towards the abyss it has the same direction of the acceleration and that is why the gravitational acceleration has a positive sign in the equation.

\(v_{f}=v_{o}+g*t\)

where:

Vf = final velocity [m/s]

Vo = initial velocity = 0 (when the rock is dropped)

g = gravitational acceleration = 9.81 [m/s²]

t = time = 4 [s]

a.

\(v_{f}=0+9.81*4\\v_{f}= 39.24 [m/s]\)

b.

In this particular situation, the acceleration will be taken as negative because the gravity is pointing in the opposite direction of the movement of the rock.

\(v_{f}=8-(9.81*4)\\v_{f}=-31.24[m/s]\)

The negative sign in the answer tells us that the rock no longer moves up instead it does downwards when 4 seconds have passed.

c.

\(v_{f}=8+(9.81*4)\\v_{f}=47.24[m/s]\)

The angular speed, to the nearest tenth, of the beacon in radians per minute, given that the beacon completes one rotation every 25 seconds is 15.0 rad/min

First, we'll begin by converting the time (in second) to minutes. This is illustrated below:

60 seconds = 1 minute

Therefore,

25 seconds = 25 / 60

25 seconds = 0.42 minute

Finally, we shall determine the angular speed. Details below:

ω = 2π/ T

ω = (2 × 3.14) / 0.42

ω = 15.0 rad/min

Thus, we can conclude that the angular speed is 15.0 rad/min

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Answer:

1. 4

2.0.625HZ

3.500

4. 428274940000000 or 4.2*10^14

5. 2

Explanation:

omnicalculator.com/physics/wavelength

Answer:

radiation and reflection

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Gravity's acceleration is 9.8 m/s², The speed of each seat is 11.63 m/s.

Define acceleration of gravity?

Acceleration due to gravity is also acceleration, but acceleration is only concerned with the force of gravity, whereas acceleration is concerned with any force.

The acceleration due to gravity on any body is the acceleration with which the earth attracts the body towards itself as a result of the earth's gravitational field. The acceleration due to gravity is the acceleration with which a body moves towards the earth due to gravity.

The gravitational force between two objects is affected by the distance between their centres of mass, so the force of gravity on an object is smaller at the equator than at the poles. Because of this effect, gravitational acceleration is about 0.18% lower at the equator than at the poles.

given data:

diameter = 7.83 m

mass = 10 kg

distance = 3.3 m

angle = 43.5°

acceleration of gravity = 9.8 m/s²

for speed we will apply here formula that is express as

speed = √(Rg/tanθ )    ......................1

put here all value in equation 1 we get

here R = diameter /2 + mass × sin43.5

R = 7.83/2 + 10(0.463)

R= 8.545 m

speed =  √(8.545(9.8)/tan(90-43.5) )

speed = 11.63 m/s

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It will take approximately 0.303 seconds for the marble's speed to be reduced to half of its initial value. To solve this problem, we need to use the given acceleration equation a = -3.60v² .

Let's start by finding the initial acceleration of the marble when it enters the fluid with a speed of 1.65 m/s. Plugging in v = 1.65 into the acceleration equation, we get: a = -3.60(1.65)² = -10.23 m/s²
So, the initial acceleration of the marble is -10.23 m/s².

Next, we need to find the speed at which the marble's speed is reduced to half of its initial value. Since the acceleration is proportional to the speed squared, we know that the speed will decrease by a factor of √2 when the acceleration is halved. So we need to find the time it takes for the acceleration to decrease to half of its initial value, which is: a/2 = -5.115 m/s²

Now we can use the kinematic equation: v = v₀ + at ;
where v₀ is the initial speed (1.65 m/s), v is the final speed (0.825 m/s), a is the acceleration (-5.115 m/s²), and t is the time we're trying to find.
and, t = (v - v₀) / a = (0.825 - 1.65) / (-5.115) = 0.303 seconds

So it will take approximately 0.303 seconds for the marble's speed to be reduced to half of its initial value.

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KE = 1000 J

Math

Pre-Algebra

Order of Operations: BPEMDAS

Physics

Energy

Kinetic Energy Formula: \(\displaystyle KE = \frac{1}{2}mv^2\)

Step 1: Define

m = 20 kg

v = 10 m/s

Step 2: Find KE

Answer:

18

Explanation:

EDGE2021

Explanation:

The speed is determined by the distance that is traveled by an object during a given amount of time. If the time is decreased, the speed would increase. The reason for this is that time is inversely proportional to the speed of an object.

An ideal gas trapped inside a thermally isolated cylinder expands slowly by pushing back against a piston, then the temperature of the gas A. decreases.

A thermally isolated cylinder is an instrument that doesn't exchange heat with its surroundings. The piston in this case is moved in a slow way, so there isn't any change in the kinetic energy of the gas particles. The work done by the gas is equal to the negative of the area under the curve, which implies that the work done by the gas is negative. Because the work done by the gas is negative, the gas's internal energy decreases.

Because the internal energy of an ideal gas is equal to its temperature, the temperature of the gas decreases due to the expansion, since the internal energy decreases as the volume increases. In conclusion, when an ideal gas trapped inside a thermally isolated cylinder expands slowly by pushing back against a piston, then the temperature of the gas decreases. Therefore, the answer to this question is option (a) Decreases.

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In this scenario, the car with a higher center of gravity is more likely to slide off the road during the turn. This is because on a wet road, the friction between the tires and the road surface is reduced, making it easier for the car to lose traction and slide.

When a car enters a turn, it experiences centrifugal force that pushes it towards the outside of the turn. To counteract this force, the tires need to grip the road surface and provide enough lateral force to keep the car on the road.  A car with a higher center of gravity will have a higher tendency to lean towards the outside of the turn, putting more weight on the outer tires.

This can reduce the grip of the inner tires, making it more likely for the car to slide off the road. Therefore, the car with a lower center of gravity is less likely to slide off the road during the turn, assuming their speeds remain unchanged. It is important to always drive at a safe speed and be cautious while driving on wet roads to avoid accidents.

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The correct graph should have a positive slope for the initial acceleration phase, a horizontal line for the constant velocity phase, and a negative slope for the deceleration phase.

To determine which graph represents the motion correctly, let's analyze the given information step by step.

The car starts from rest and accelerates at 1 m/s² for 2 seconds.

During this period, the velocity of the car increases linearly, as the acceleration is constant. Therefore, the graph representing this phase should be a straight line with a positive slope.

The car then continues at a constant velocity for 10 seconds.

Since the car maintains a constant velocity during this period, the graph representing this phase should be a horizontal line, indicating no change in velocity.

The car sees a tree blocking the road and applies brakes, decelerating at 1 m/s² until it comes to rest.

During this phase, the car's velocity decreases linearly due to the deceleration. Therefore, the graph representing this phase should be a straight line with a negative slope.

Based on this analysis, the correct graph should have a positive slope for the initial acceleration phase, a horizontal line for the constant velocity phase, and a negative slope for the deceleration phase.

Among the given options, the graph that represents the motion correctly is likely to be a graph that meets these criteria. However, since the options were not provided, I'm unable to directly identify the correct graph.

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A substance's density is determined by how much space it occupies (volume) in relation to its mass. How compact or concentrated anything is determined by its density. The volume of gas must be in the swim bladder is 0.0047 m³.

The density of a substance indicates how dense it is in a given area. Mass per unit volume is the definition of a material's density. In essence, density is a measurement of how closely stuff is packed. It is a particular physical characteristic of a specific thing.

The expression used to calculate density is:

Density = Mass/volume

volume = Mass/density

m = 5 kg

D = 1060 kg/m³

V = 5 kg / 1060 kg/m³

V = 0.0047 m³

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Applying Archimedes' Principle, the volume of gas in the swim bladder of a 5.0 kg fish to be neutrally buoyant is calculated to be 0.00028 m³.

To solve this problem, we need to apply Archimedes' Principle which states that the buoyant force on an object equals the weight of the fluid it displaces. In this case, the fish is neutrally buoyant when the weight of the water displaced is equal to the fish's weight.

First, we calculate the weight of the fish. Weight is mass times gravity, so the 5.0 kg fish weighs W = m * g = 5.0 kg * 9.8 m/s² = 49 N.

Then, we calculate the volume of the water displaced by the fish when it's neutrally buoyant. The weight of the water displaced (which equals the fish's weight) is 49 N. Since weight is density times volume times gravity, the volume of water displaced is Vw = W / (ρw * g) = 49 N / (1000 kg/m³ * 9.8 m/s²) = 0.005 m³.

Finally, we calculate the volume of the fish minus the volume of the gas in the swim bladder using the density of the fish with its swim bladder deflated. If the fish's body with its swim bladder deflated has a density of 1060 kg/m3, then its volume is Vf = m / ρf = 5.0 kg / 1060 kg/m³ = 0.00472 m³.

The volume of gas in the swim bladder is thus Vg = Vw - Vf = 0.005 m³ - 0.00472 m³ = 0.00028 m³.

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We can conclude that The star is moving toward us; shift to a shorter wavelength.

The transfer of an electron to a higher energy level, such as n = 1 or n = 2, occurs when a hydrogen atom absorbs a photon. The Balmer series refers to this group of hydrogen emission spectra.

The phrase "blueshift" describes how light waves change as an object approaches toward us in space, shifting wavelengths toward the blue end of the spectrum. Change to a shorter wavelength when the star approaches us. A shorter wavelength indicates a blueshift (shift to the blue end of the spectrum), which indicates that the object is travelling in our direction.

Therefore, We can conclude that The star is moving toward us; shift to a shorter wavelength.

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Answer:

the moon is closer to the earth so that its gravitational gradient is stronger than that of the sun.

Explanation:

The process which involves plants to cause weathering to a seed that falls into a crack in a rock therefore, breaking apart the rock is called Mechanical weathering.

This is defined as the set of weathering processes that break apart rocks into particles (sediment) through physical processes. The most common form of mechanical weathering is the freeze-thaw cycle. Water seeps into holes and cracks in rocks then the water freezes and expands, therefore making the holes larger eventually making the rock split apart.

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Answer:

root-pry

Explanation:

i took the test

Answer:

2

Explanation:

1+x/4+x = 1/2

4+x = 2 + 2x

x = 2

Answer:

The key idea behind the synthesis, processing and application of alloys consist in combining desire qualities from each mineral component in the form of a material.

Explanation:

The key idea behind the synthesis, processing and application of alloys consist in combining desire qualities from each mineral component in the form of a material. For example, steel is the combination of iron, which is ductile but prone to rusting in wet environments, and carbon, which offers high hardness and additional resistence to rusting in wet environments, but is fragile. Hence, steel is more resistant to rusting, ductile as iron and more resistant than iron.

a) Height of 2.5 m if the stationary mass is also 5.0 kg. b) Height of 1.25 m if the stationary mass is 10.0 kg. c) The first bowling ball will not be able to travel back up the ramp if the stationary mass is 500.00 kg.

a) In a perfectly elastic collision, both momentum and kinetic energy are conserved. Since the stationary mass has the same mass as the first bowling ball, they will exchange velocities after the collision. The first bowling ball will reverse its direction and travel back up the ramp to the same height from which it started, which is 2.5 m.

b) If the stationary mass is 10.0 kg, the collision will result in a different outcome. After the collision, the first bowling ball will still reverse its direction, but it will not reach the same height as before. Using the conservation of momentum and kinetic energy, we can calculate that the first bowling ball will reach a height of 1.25 m.

c) If the stationary mass is 500.00 kg, the first bowling ball will not be able to travel back up the ramp after the collision. The large mass of the stationary object will significantly affect the outcome of the collision, preventing the first bowling ball from reaching any positive height.

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a)  The distance between nodal planes of the electric field is approximately 3.37 meters.

To find the distance between nodal planes of the electric field (E), we can use the formula:

λ = c / f

Where:

λ is the wavelength

c is the speed of light in vacuum (approximately 3.00 × 10^8 m/s)

f is the frequency

Given:

f = 89.0 MHz = 89.0 × 10^6 Hz

Substituting the values into the formula:

λ = (3.00 × 10^8 m/s) / (89.0 × 10^6 Hz)

  = 3.37 m

b)The distance between a nodal plane of the electric field (E) and the closest nodal plane of the magnetic field (B) is approximately 1.685 meters.

The distance between a nodal plane of the electric field (E) and the closest nodal plane of the magnetic field (B) in an electromagnetic wave is half the wavelength (λ/2).

Using the same wavelength calculated in part (a):

λ/2 = 3.37 m / 2

    = 1.685 m

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Hey,

Following the second Newton's Law  :

✔ We apply : F = m x a ⇔ m = F/a with F in N, m in kg and a in m/s²

the object therefore has a mass of 8 kg

Answer:

2.82 m/s²

Explanation:

\(v = u + at \\ 24 = 0 + a(8.5) \\ a = 2.82 \: ms {}^{ - 2} \)

The acceleration of a motorcycle is 2.82 m/s^2.

Acceleration is the rate at which speed and direction of velocity vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates.

Even if the speed is constant, motion on a circle accelerates because the direction is always shifting. Both effects contribute to the acceleration for all other motions.

Given that:

Initial velocity of the motor cycle: u = 0 m/s.

Final velocity of the motorcycle = 24 meter/second.

Time taken to reach this velocity = 8.5 second.

Hence, acceleration of the motor cycle = change in velocity/time interval

= ( final velocity - initial velocity)/time interval

= ( 24 m/s  - 0 m/s)/8.5 s

= 2.82 m/s^2.

Its acceleration is 2.82 m/s^2.

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