A bicyclist is in a 50-km race. He says he had an average velocity of 35. What is missing in the cyclist’s velocity? A. units only B. units and distance C. direction only D. units and direction

Answers

Answer 1

Answer:

Answer: (D). The unit and direction is missing.

Explanation:

Velocity: Velocity is the speed of the object with direction and it is the vector quantity. The unit of velocity is m/s.

Average velocity: Average velocity is defined as the total distance divided by the total time.

$\Delta v=(D)/(T)$

Here,

D = Total distance

T = Total time

According to the question:

The unit and the direction is missing in the cyclist's velocity.

Hence, The unit and direction is missing.

Answer 2

Answer: ACTUALLY... The answer is units and direction.

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(x - 4)2 = 36 Which of the following expressions represents the solutions to the given equation?

A plane leaves the airport in Galisteo and flies 170 km at 68.0° east of north; then it changes direction to fly 230 km at 36.0° south of east, after which it makes an immediate emergency landing in a pasture. When the airport sends out a rescue crew, in which direction and how far should this crew fly to go directly to this plane?

Answers

Answer:

The direction will be $84.86^\circ$ and the distance 250.75km.

Explanation:

Let's say A is the displacement vector which represents the first 170km and B the one for the next 230km. Then the components of these vector will be:

$A_x=170cos(68^(\circ))\n A_y=170sin(68^\circ)\n\nB_x=230cos(-36^\circ)\nB_y=230sin(-36^\circ)$

The vector which point from the origin to the final position of the plane will be R=A+B. We sum components on x and y independetly (vector property):

$R_x=A_x+B_x=170cos(68^(\circ))+230cos(-36^\circ)=63.68km+186.07km=249.75km$

$R_y=A_y+B_y=170sin(68^\circ)+230sin(-36^\circ)=157.62km-135.19km=22.43km$

If $\theta$ is the direction of R then:

$tan(\theta )=(R_x)/(R_y)$ ⇒ $\theta = arctan((R_x)/(R_y))$ ⇒ $\theta = 84.86^\circ$ .

The distance will be given by the magnitud of the vector R:

$R=√(R_x^2 + R_y^2)$ ⇒ $R=√(R_x^2 + R_y^2) = 250.75$ .

What is the unit of work? (select all that apply) *force

Kg*m/s^2

kg*m^2/s^2

joule

A lastname

none of the above

Answers

Joule is the unit of work .

What is meant by work ?

Activity that a person habitually engages in to earn a living is activity that persons looking for job engage in.

Activity in which one utilises strength or faculties to do or do anything. a particular duty, responsibility, function, or assignment that often forms a component or stage of a bigger action.

Thus, Joule is the SI unit of work (J). The work accomplished by a force of one newton creating a displacement of one metre is known as a joule.

To learn more about Joules, refer to the below link:

brainly.com/question/23501345

# SPJ2

Answer:

Joule is the answer

Please give me brainleast

Which extremely flammable gas is most commonly burned for fuel in a home? A) Hydrogen B) Methane C) Propane D) Butane

Answers

Answer:

B ) Methane

Explanation:

Methane is known as a natural gas and is the most commonly used sources of fuel amongst businesses and homes to power water heaters and stoves.

What instrument converts electrical energy to sound or image signals in a radio or television?

Answers

Answer:

In a radio or television, the instrument that converts electrical energy into sound signals or image signals is called a transducer. Transducers are devices that can convert one form of energy into another.

In the context of television, a television camera is an example of a transducer that converts light energy (captured through a lens) into electrical signals representing images or video. These electrical signals can then be processed and transmitted for display on a television screen.

In the context of a radio, a microphone is an example of a transducer that converts sound waves (acoustic energy) into electrical signals. These electrical signals, which represent sound, can then be amplified, modulated, and broadcast over the radio waves for reception by a radio receiver.

So, depending on whether you're referring to a television or a radio, the specific transducer used for converting electrical energy to sound or image signals may vary, but the concept of a transducer applies to both.

The potential difference across wire is 75V and its electric resistance is 30Ω. Find out the electric current through the wire.

Answers

Answer:

current = 2.5A

Explanation:

We can use Ohm's law which states that V∝R so V=IR when the temperature is constant where V is the voltage (potential difference), I is the current and R is the resistance.

75= 30I

I= 75/30= 2.5A

What types of telescope use a mirror to bring light to focus?

Answers

A reflecting telescope uses a series of curved mirrors to bring light to focus.

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