At the top of a roller coaster there is a cabin whose mass is 100 kg at a height of 40 m and with a speed of 5 m/s.

A. Calculate its mechanical energy.

(Please help!)

Explanation:

Distance travelled (d) = 56 metres

Time taken (t) = 7 seconds

velocity of the object (V)

= d / t

= 56 / 7

= 8 m/s

The velocity of the object is 8 m/s.

Hope it will help :)

The surface (radius = r) of a cylindrical space station is rotating at 27.5 m/s to provide artificial gravity.The radius of the cylindrical space station would need to be approximately 321.6 meters for the astronauts to weigh 1/3 of their Earth weight.

To determine the value of r for the astronauts to weigh 1/3 of their Earth weight, we need to consider the centripetal force acting on them due to the rotation of the cylindrical space station.

The centripetal force can be calculated using the formula:

F = m × (v^2 / r)

Where:

F is the centripetal force

m is the mass of an astronaut

v is the tangential velocity of the rotating surface

r is the radius of the rotating surface

The weight of an astronaut on Earth is given by the formula:

W = m × g

Where:

W is the weight on Earth

g is the acceleration due to gravity on Earth

We want the astronauts to weigh 1/3 of their Earth weight, so we can write:

W = (1/3) × W_earth

Substituting the weight formula, we have:

m ×g = (1/3) × (m × g_earth)

The mass cancels out, and we're left with:

g = (1/3) × g_earth

Now, we can equate the centripetal force and the weight:

m × (v^2 / r) = m × g

The mass cancels out again, and we have:

(v^2 / r) = g

Substituting the value of g from before, we get:

(v^2 / r) = (1/3) × g_earth

Finally, rearranging the equation to solve for r, we have:

r = (v^2) / ((1/3) × g_earth)

Substituting the given values:

v = 27.5 m/s

g_earth = 9.8 m/s^2

r = (27.5^2) / ((1/3) × 9.8)

Calculating this, we find:

r ≈ 321.6 meters

Therefore, the radius of the cylindrical space station would need to be approximately 321.6 meters for the astronauts to weigh 1/3 of their Earth weight.

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Answer:

Magnetic Field

Explanation:

Answer:

Parallel Circuits

Explanation:

Loads can be operated on their own. If you had a series circuit, adding another light would dim the rest!

Answer:

metamorpic rock

Explanation:

the rock stay near the ocen

Answer:false

Explanation:because it means you're pushing yourself too much and you need to use smaller weights

We have that the velocity of the ball when it hits the glass.Using the appropriate significant figures is

V=4.43ft/s

From the question we are told that

Generally the equation for the Velocity  is mathematically given as

\(V^2=2as\\\\Therefore\\\\V=\sqrt{2*9.8*1}\\\\V=4.43ft/s\)

Therefore

the velocity of the ball when it hits the glass.Using the appropriate significant figures is

V=4.43ft/s

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Answer:

-30m

Explanation:

displacement = final position - initial position, or d = -20-10

Answer:

Please find attached the required filled diagram created with MS Visio

Explanation:

Waves → Are produced by → Vibrating molecules → Which pass energy to → neighboring molecules

Waves → Are → Repeating disturbances → That transfers → Energy → Through → Matter or Space

Waves → that need a → Medium → are called → Mechanical → And can be either → Compressional → Or → Transverse

A 25.5 kg video cart is rolled down a hallway. It is accelerated at 0.12 m/s2. If a force of 30 N is applied to move the cart . The wheels have 26.4 N  force of friction against the floor

Force of friction is that force  that resists the sliding or rolling of one solid object over another

F(applied) - friction = F net

30 - fr = mass * acceleration

30 - fr  = 25.5  *  0.12  

fr = 30 - 3.06

  = 26.4 N

The wheels have 26.4 N  force of friction against the floor

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A load cell is an essential sensor device used for converting a force, torque, pressure, or displacement into an electrical signal. It is a key component in electronic scales, force measuring instruments, and weighing devices. A student who designs an electric scooter uses a simple column type load cell with two strain gauges.

The load cell measures force or weight by converting the tension or compression acting on the load cell into an electrical signal. A load cell typically comprises four strain gauges that are arranged in a Wheatstone bridge configuration. A column type load cell is cylindrical in shape and is designed to measure loads in compression. It typically comprises two columns that are connected by a metal diaphragm. Two strain gauges are attached to the columns, one for measuring the compressive strain and the other for measuring the tensile strain.

The student designing an electric scooter uses a load cell to measure the weight of the rider and other loads on the scooter. The load cell is typically placed at the bottom of the scooter's frame, and the weight of the rider and the scooter is applied to it. The load cell measures the weight by converting the compression force acting on it into an electrical signal. The two strain gauges attached to the columns of the load cell measure the compressive and tensile strains, respectively. These strains are converted into an electrical signal using a Wheatstone bridge circuit, and the output of the bridge is proportional to the weight applied to the load cell.The student designing the electric scooter needs to select the right load cell for the application. The load cell must be able to measure the maximum weight that the scooter can carry. The column type load cell is suitable for measuring loads in compression, which is ideal for measuring the weight of the rider and the scooter. The two strain gauges attached to the columns of the load cell help to increase the sensitivity and accuracy of the load cell. The Wheatstone bridge circuit helps to convert the strain measurements into an electrical signal that can be processed by the scooter's control system.

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Answer:

this seems to not be worded right

Explanation:

Answer:

\(300\) cm are equivalent to \(3\) m.

Explanation:

\(100\) cm are equivalent to \(1\) m.

\(100 \mathrm{~cm}$=1{~m}$\)

\(3 \mathrm{~m}$=3\times100\)

\(=$300{~cm}$\)

To convert meters (\(\mathrm{~m}$\)) into number of centimeters (\(\mathrm{~cm}$\)), multiply that number by \(100\).

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At the moment the ball has zero velocity, it is at the highest point of its trajectory and its direction of motion has changed from upward to downward.

Therefore, the acceleration of the ball at that moment is equal to the acceleration due to gravity, which is approximately 9.8 m/s^2 downwards. This acceleration is constant throughout the ball's motion and acts in the direction opposite to its motion.
The acceleration of the ball when its velocity is zero: At the moment the ball has zero velocity, which occurs at the highest point of its trajectory, its acceleration remains constant at approximately -9.81 m/s². This acceleration value is due to Earth's gravity, acting downward (negative direction) on the ball.

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Answer:

a. slope=rise/run

rise=0.02

run=-2

determined using the point (3,0.08) and (1,0.1) on the graph

slope=0.02/-2

= -0.01 or -1/100

b.area= area of trapizoid+ rectangle

((0.07+0.11)÷2)×4+1×0.07

0.36+0.07

=0.43$

c. the area represent the total cost after 5 hours

PLEASE MARK BRAINLIEST

u=0

a=10.9m/s^2

s=226m

v^2-u^2=2as

v^2=2 (10.9)(226)

v^2=49268

v=70.2m/s^2

v=u+at

70.2=0+10.9 (t)

70.2/10.9=t

t=6.44s

The problem requires us to determine the total signal loss of a transmitter that operates at 2.4 GHz and is connected to an antenna by a 94 feet long LMR-600 cable, given that the cable connector has a loss of 0.47 dB.What is signal loss.

The signal loss refers to the reduction of strength of a signal while it travels through a medium or transmission system from the transmitter to the receiver. In communication systems, signal loss can occur in a cable, antenna, or other components. The total signal loss depends on the specific system used, cable attenuation, connector type, and the distance between the transmitter and receiver.

The total signal loss can be determined as the sum of the cable loss and the connector loss. Total Signal Loss(dB) = Cable Loss(dB) + Connector Loss(dB)  = 0.508 dB + 0.47 dB = 0.978 dBTherefore, the total signal loss of the transmitter connected to the antenna by a 94 feet long LMR-600 cable, assuming that the cable connector has a loss of 0.47 dB, is 0.978 dB, approximately.

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Answer:

I think 100V but I'm not sure.

Answer:

Having a planner gives students freedom to plan, organize and keep track of their work to the best of their abilities and requirements. This has a dual benefit in that it increases the student's accountability to the commitments planned as well as provides them with a structure that contributes to their success.

Explanation:

Answer: I do believe the answer is D if not then sorry and let others know in the comment section

The doll experiment did not suggest the African Americans felt more secure and positive because of school segregation. The correct option is D.

School segregation in the United States is the segregation of students based on their colors and caste. An institution can be predominantly owned by the black and only black students can study into it.

The Americans who are black belonged to the African continent. They felt more safety and secure by studying into this segregated school.

Thus, the correct option is D.

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To keep the meter stick balanced option b) 70 cm  would hang a third mass of 0.60'

One οf a bοdy's fundamental characteristics is mass. Befοre the discοvery οf the atοm and particle physics, it was widely cοnsidered tο be cοnnected tο the amοunt οf matter in a physical bοdy. Theοretically having the same quantity οf substance, it was discοvered that distinct atοms and elementary particles have varying masses.

Several cοnceptiοns οf mass exist in cοntempοrary physics, all οf which are physically equivalent while cοnceptually differing. The resistance οf the bοdy tο acceleratiοn (change οf velοcity) when a net fοrce is applied is knοwn as inertia, and inertia may be measured experimentally using mass. The magnitude οf an οbject's gravitatiοnal pull οn οther bοdies is alsο gοverned by its mass.

To keep the meter stick balanced, the torques on both sides of the pivot point must be equal. The torque is calculated as the product of the weight (mg) and the perpendicular distance from the pivot point.

The correct option is b) 70 cm

0.5 kg at 20 cm

0.3 kg at 60 cm

x = Distance of the third 0.6 kg mass

Meter stick hanging at 50 cm

Torque about the support point is given by (torque is conserved)

The position of the third mass of 0.6 kg is at 20+50 = 70 cm

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Answer:

6 mph

Explanation:

18 divided by 3 equals 6. The person walks 6 miles per hour.

Velocity of Emmy at time of 3.49 s is calculated to be as -8.47 m/s.

Velocity defines the direction of movement of the body or any object.

Given, initial velocity of Emmy, u = 2 m/s

acceleration at time , 3.0 s is -3 m/s²

acceleration at time, 4.0 s is -3 m/s²

Acceleration at time of 3.49 s must be -3 m/s², as the acceleration is constant from 3.0 s to 4.0 s.

Velocity of Emmy at time 3.49 s can be calculated as ;

v= u +at

a is the acceleration of Emmy at time-- 3.49 s

u is initial velocity of Emmy

v is final velocity of Emmy at time -- 3.49s

v= 2 + ( -3 * 3.49)

v = -8.47 m/s

Hence, velocity of Emmy at time , 3.49 is -8.47 m/s

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Note: The question given on the portal is incomplete. Here is the complete question,

Question: Emmy is standing on a moving sidewalk that moves at +2 m/s. Suddenly, she realizes she might miss her flight, so begins to speed up, but then she hears over the PA system that her flight is delayed. Emily's acceleration during the 5 s time period in which all of the events occur is shown in the acceleration versus time graph. In the velocity versus time graph, construct a plot of Emmy's velocity over this same time period. Assuming all the values given are exact, what is Emmy's velocity at a time of 3.49s? Enter your answer to at least three significant digits.

If the sound comes from the right side, the waves reach the right ear before the left ear. if the sound comes from the left side, the waves reach the left ear before the right ear. The difference between the phases of waves reaching both ears is detected by the ears and then interpreted by the brain

Answer:

Sonic boom.

When something breaks the sound barrier. (Moves faster than sound, like lighting)

Explanation:

Try flying a plane.

Answer:

The pushing force and the skier's mass

(A) is correct option.

Explanation:

Given that,

Mass = 64 kg

Weight = 608 N

Velocity = 21 m/s

Forward force = 45 N

We need to calculate the reaction force of the snow pushing  on the skier

Using given data,

The reaction force of the snow pushing  on the skier is equal to the pushing force and the skier's mass.

Hence, The pushing force and the skier's mass

(A) is correct option.

The two key events in skiing are the air friction (air resistance) that pushes on a skier's body and the friction between the ski base and the snow. Thus, option A is correct.

A thin lubricating water layer produced while skiing can be used to explain the low sliding friction between skis and snow. For sliding to take place, this extremely thin water film is necessary.

While numerous frictional forces work to counter the skier's motion, gravity acts to speed the skier down the hill. Downhill skiing heavily relies on reducing friction.

Therefore, forces from snow reactions, friction, and gravity. Skiers are subject to these factors. In order to maintain equilibrium, a skier must control these pressures through both proactive and defensive actions.

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