Why is it important to have a reference direction specified before describing a location in terms of positive or negative?n

If the mechanical advantage of a lever is 3 and the input distance (effort arm) is 12 meters, the output distance (load arm) would be 4 meters.

To solve this problem, we can use the formula for mechanical advantage: MA = output force / input force = input distance / output distance.

Since we know that the mechanical advantage is 3 and the input distance is 12 meters, we can plug in those values to solve for the output distance:
3 = input distance / output distance
3(output distance) = 12
output distance = 12 / 3
output distance = 4 meters
So the output distance (load arm) would be 4 meters.

It's important to remember that in a lever, the mechanical advantage depends on the ratio of the length of the effort arm to the length of the load arm. In this case, a mechanical advantage of 3 means that the effort arm is three times longer than the load arm. By knowing one of the distances, we can solve for the other.

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The mass of the vessel, m = 74400 kg

The external diameter, d = 5.20 m

Radius, r = 5.2 / 2 = 2.6 m

The volume of the vessel is given by the volume of a sphere

a) The buoyant force (B) is given by the formula:

b) The tension in the cable is given by the equation

Where T represents the tension

T = 739613.35 - 74400(9.8)

T = 10493.35

Answer:Korotkoff Sounds. -tapping sounds created by turbulent blood flow in arm. -pressure is slowly being released from cuff, so systolic pressure is above that of the cuff, but diastolic is still below, so the artery opens in systole and collapses in diastole.

Explanation:

It is about 0.0003 AU, or about 10 times the distance from the Earth to the Sun. Sagittarius is a constellation in the southern celestial hemisphere. It is one of the 48 constellations listed by the ancient Greek astronomer Ptolemy and is named after the Latin word for "archer."

Sagittarius A* (pronounced "Sagittarius A-star"), also known as the supermassive black hole at the center of the Milky Way galaxy, is believed to have a diameter of about 44 million kilometers, or about 1.4 times the size of the orbit of Pluto. This is equivalent to about 0.000015 lightyears or about 0.0003 astronomical units (AU).

Diameter of Sagittarius A* = 44 million kilometers

1 lightyear = 9.4605284 × 10^15 meters

Diameter of Sagittarius A* = 44 million kilometers * 1000 meters/kilometer

= 44,000,000 meters

Diameter of Sagittarius A* = 44,000,000 meters / 9.4605284 × 10^15 meters/lightyear

= 0.000015 lightyears

1 AU = 1.495978707 × 10^11 meters

Diameter of Sagittarius A* = 44,000,000 meters / 1.495978707 × 10^11 meters/AU

= 0.0003 AU

So the diameter of Sagittarius A* is about 0.0003 AU, or about 10 times the distance from the Earth to the Sun.

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In order to create a magnifier in convex lens, you should choose a short focal length that is lesser than 1 meter.

A convex lens is also referred to as converging lens and it can be defined as a type of lens that typically causes parallel rays of light with respect to its principal axis to come to a focus (converge) and form a real image.

In Science, a magnifier refer to an optical instrument that allow us to look at a very near object because its image is generally formed farther away. Thus, the image of the object appears to be much larger.

In this context, you should choose a short focal length that is lesser than 1 meter when you want to create a magnifier in convex lens because the nearer the object is to the lens, the larger would be the image formed.

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It will take the bug a time of 3.5 seconds to travel 7 meters across a floor at a speed of 2 m / s

v = d / t

v = Velocity

d = Distance

t = Time

v = 2 m / s

d = 7 m

t = d / v

t = 7 / 2

t = 3.5 s

Velocity is the rate of change of distance at a given amount of time. It is denoted by v.

Therefore, it will take the bug 3.5 seconds

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When the distance between the plates is decreased to 1.90 mm, the capacitance of the capacitor will increase and the energy stored in the capacitor will also increase.

However, since the voltage across the plates is not given, it is not possible to calculate the energy stored in the capacitor after the separation of the plates has been changed

The below equation gives the capacitance of a parallel-plate capacitor.

C = ε * A / d

Where ε is the dielectric constant of the material between the plates, A is the area of the plates and d is the distance between the plates.

The energy stored in a capacitor is given by the equation:

Energy = 1/2 * C * V^2

where V is the voltage across the plates and C is the capacitance

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Answer:

Acids break down fabrics and can cause burns if the acids are strong.

Explanation:

A protective apron or lab coat is important when working with acids because acids break down fabrics and can cause burns if the acids are strong.

Answer:

C

Explanation:

I got it right

Watt-hours and kilowatt-hours are both measures of energy. To convert watt-hours to joules, we need to break down the units and use the appropriate conversion factors.

1 watt-hour is equal to 3600 joules. This conversion factor comes from the fact that power is equal to energy divided by time, and 1 watt is equal to 1 joule per second. Since there are 3600 seconds in an hour, we multiply the power in watts by the number of seconds in an hour to get the energy in joules.

To convert kilowatt-hours to joules, we first convert kilowatts to watts. 1 kilowatt is equal to 1000 watts. Then, we multiply the power in watts by the number of seconds in an hour (3600 seconds) to get the energy in joules.

Here are the conversion steps:

1. For watt-hours to joules:
  - Multiply the watt-hours by 3600 to get the energy in joules.

2. For kilowatt-hours to joules:
  - Multiply the kilowatt-hours by 1000 to convert to watts.
  - Multiply the result by 3600 to get the energy in joules.

Remember to always label your final answer with the correct units.

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A motorcycle was heading south at 90 m/s and then it turned west and went 35 m/s , the velocity of the motorcycle is 62.5 m/s. This is average velocity.

Velocity is the directional speed of an object in motion as an indication of its rate of change in position as observed from a particular frame of reference and as measured by a particular standard of time (e.g. 60 km/h northbound). Velocity is a fundamental concept in kinematics, the branch of classical mechanics that describes the motion of bodies.

Velocity is a physical vector quantity; both magnitude and direction are needed to define it. The scalar absolute value (magnitude) of velocity is called speed, being a coherent derived unit whose quantity is measured in the SI (metric system) as meters per second (m/s). If there is a change in speed, direction or both, then the object is said to be undergoing an acceleration.

Given

initial velocity , x=90m/s

final velocity , y=35m/s

formula for average velocity is \(\frac{1}{2}\) (x + y)

substituting the values

average velocity is 62.5m/s

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The horizontal distance is R = 8100 m.

What are Newton's first, second, and third laws of motion?

According to the first law, a force must be applied to an object before it may affect its motion. According to the second law, an object experiences a force equal to its mass times its acceleration. According to the third law, when two things interact, they exert forces on one another that are both equal in strength and directed in the opposite direction.

To find the height of the plane from ground :

H = ut + (1/2)gt²

Where

initial velocity ,u = 0 m/s,

t = time = 27 s,

acceleration due to gravity ,g = 10 m/s²

H = 0*(27) + (1/2)*(10)*(27)²

H = 3645 m = 3.6 km

The horizontal distance (R) :

R = ut

R = 300*(27)

R = 8100 m

If d represent the distance from the engine to the air plane at the ground, hence:

d² = 8100² + 3645²

d = 7233 m

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Answer:

the stars which are red in color are cool.

Explanation:

The stars which has reddish color are cool in nature while those stars which has white and blue in color are very hot in nature. The stars change its color when they becomes hotter , first the star color reddish when they are cool but with increasing temperature it changes the color from reddish to orange then yellow. After yellow it turns green and finally get blue color when the stars are very very hot.

Answer: 1 m/s

Explanation: 1 km = 1000 m (1 kilometer is equal to 1000 meters)

1 hour = 3600 seconds (1 hour is equal to 3600 seconds)

Cardiovascular drug classes are Beta-blockers, Diuretics, Calcium channel blockers, and ACE inhibitors. The correct answer is options are A, B, D, and F.

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The correct question would be as

Which of the following are cardiovascular drug classes? Select all that apply.

A) Beta-blockers

B) Diuretics

C) Antibiotics

D) Calcium channel blockers

E) Antidepressants

F) ACE inhibitors

The combined tension of the two ropes on the swing is 4.34 N.

The force communicated through a rope, string, or wire when two opposing forces draw on it is known as tension. The tension force pulls energy equally on the bodies at the ends and is applied along the entire length of the wire.

Every physical object in contact with another one applies some force to that object.

Given that: angle with the vertical is = 13°.

Tension in each rope = 2.28N.

Hence, the resultant tension is = 2 × 2.28 N × cos18°

= 4.34 N.

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Answer:

0.8sec

Explanation:

Σf= 7.5-5= 2.5 N to the left

Σf=m*a=>2.5=2a=>a=1.25 m/s²

Lets say that the speed is 1m/s

a=speed-0/x=>x=1/1.25=>x=0.8

Hence the time will be 0.8sec

A free-body diagram represents the forces acting on a body. Let's draw a free-body diagram showing the forces acting on an elephant: Here, the force acting downwards is the weight (W) of the elephant, which is balanced by the normal force (N) exerted by the ground.

Weight of the elephant on Earth: The weight of the elephant is equal to the force due to gravity acting on it. On Earth, the acceleration due to gravity (g) is approximately 9.81 m/s².

So, the weight of the elephant on Earth = mass × acceleration due to gravity= 3500 kg × 9.81 m/s²= 34335 N.

Therefore, the weight of the elephant on Earth is 34335 N.

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Lets find

\(\\ \sf\longmapsto Modulus\:of\:elasticity=\dfrac{Stress}{Strain}\)

\(\\ \sf\longmapsto \dfrac{\left[ML^{-1}T^{-2}\right]}{\left[M^0L^0T^0\right]}\)

\(\\ \sf\longmapsto \left[ML^{-1}T^{-2}\right]\)

Hello, use the formula:

Pe = mgh

Data:

Pe = Potential energy = ¿?

m = Mass = 48 kg

g = Gravity = 9,81 m/s²

h = Height = 7 m

Replacing according our data:

Pe = 48 kg * 9,81 m/s² *  7 m

Pe =3296,16 J

The potential energy of the skateboarder is 3296,16 Joules

The voltage can be obtained by the use of Ohm's law as 20 V.

The Ohm's law states that; the current (I) via a conductor between two places is directly proportional to the voltage (V) between the two sites and inversely proportional to the resistance (R) between them if the temperature and other physical factors remain constant.

By the use of the Ohm's law, we know that;

V = IR

I = 2A

R = 10 ohms

V = 2 * 10

V = 20 V

Thus the voltage that is required by the question is 20 V

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Answer: 80 mph

Explanation:

Answer:

The correct option is C) III. That is, the trout will suffer from disease.

Explanation:

Note: This question is not complete as the options are not included. The complete question with the options is therefore provided before answering the question as follows:

A lake is home to a large number of trout. Identify what is most likely to happen if a chemical is dumped into the lake.

I. The trout will not be affected by the pollution.

II. The number of trout will increase.

III. The trout will suffer from disease.

A) I

B) I and II

C) III

D) II and III

The explanation of the answer is now provided as follows:

Natural selection is the process that took place in the lake. Only those trouts that were fit to survive, or those that have alleles that allow them adapt to new conditions, live and multiply in the presence of an external environmental effect like pollution. In such a circumstance, the fittest organisms would have survived, and the population's allelic frequency would have grown through time. Due to pollution, creatures harboring the other alleles died, causing the total frequency of alleles to alter.

Therefore, the correct option is C) III. That is, the trout will suffer from disease.

I think when it is at it's highest point. (2)

hope this helps ^-^

Answer:

2 and 3

Explanation:

After the collision, the two cars stick together. Find the final velocity of the two cars would be 0.667 meters per second as per the conservation of the momentum after the collision.

It is the type of collision in which the total momentum as well as the kinetic energy on the system is conserved.

As given in the problem we have to find the velocity of the two cars if, after the collision, the two cars stick together,

As per the conservation of the momentum,

The total initial momentum of the cars before the collision = The total final momentum of the cars after the collision

1 × 2 + 2 × 0  = ( 1 + 2 ) × V

2 + 0 = 3 × V

V = 2 / 3

V = 0.667 meters per second

Thus, after the collision, the two cars stick together, then the final velocity of the two cars would be 0.667 meters per second

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Answer:

Second circuit

Explanation:

Court of Appeals for the Second Circuit

Force, Friction (static and kinetic), (balanced and unbalanced).

Materials - Tape, spring scales, measuring tape, string, wooden blocks, wooden blocks with sandpaper on the bottom, and different surfaces.

Procedure - 1. To test and gather information on surface friction, each group will look at four distinct surfaces (a concrete floor, a lab desk, a lab floor, and a carpet).

2. Each item should have a string firmly tied around it (a plain block of wood and the wood with sandpaper). Connect the string's looped end to the spring scale.

3. The 50 cm measuring line should be fastened to your surface. Your beginning point will be in the front, and your finishing point will be at the back.

4. Pull the unadorned wood block across the designated surface at a SLOW, STEADY SPEED for 50 cm. Note the amount of force (in N) necessary to pull the object.

5. Pull the wood block with the sandpaper on it across the designated surface at a SLOW, STEADY SPEED for 50 cm. Note the amount of force (in N) necessary to pull the object.

6. Step 5 must be repeated twice more. Put your findings in a table and on the class data spreadsheet.

REPEAT STEPS 1-6 FOR EACH SURFACE!

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Answer:

5 meters per second

Explanation:

To find the unit speed, divide the distance, 50 meters, by the time, 10 seconds.

\(\frac{50}{10} =5\)

You moved 5 meters per second. We can check this by seeing how far you move at this rate in 10 seconds. Multiply 5 by 10.

\(5\cdot 10=50\)

So, your speed is 5 meters per second.

Good luck ^^

The position of point D relative to the midpoint of cable DE can be found using the method of moments by expressing the sum of the moments about the midpoint of cable DE.

The forces acting at point D can be resolved into horizontal and vertical components. As the bent rod is in equilibrium, the sum of the horizontal components of the forces is zero. Also, as there is no horizontal component of force acting at point D, the horizontal component of the tension in cable DE is equal and opposite to the horizontal component of the tension in cable DH.

Therefore, the horizontal component of the tension in cable DE is 8cos30 and the horizontal component of the tension in cable DH is -8cos30. The vertical component of the tension in cable DE is equal to the weight of the bent rod and is given by 5g. Also, as there is no vertical component of force acting at point D, the vertical component of the tension in cable DH is equal to the vertical component of the tension in cable DE.

Therefore, the vertical component of the tension in cable DH is 5g/2. T

herefore, the sum of the moments about the midpoint of cable DE is given by

8cos30 x 4 - 5g/2 x 2 + 5g x (2 + x) - 8cos30 x (4 + x) = 0 where x is the distance of point D from the midpoint of cable DE. Solving this equation, we get x = -3.05 m.

Therefore, the position of point D relative to the midpoint of cable DE is 3.05 m to the left of the midpoint of cable DE.

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