PHYSICS COLLEGE

If a ball leaves the ground with a vertical velocity of 5.46 m/s, how long does it takethe ball to reach the highest point?

Answers

Answer 1

Answer:

Answer:

0.557 s

Explanation:

Given:

v₀ = 5.46 m/s

v = 0 m/s

a = -9.8 m/s²

Find: t

v = at + v₀

0 m/s = (-9.8 m/s²) t + 5.46 m/s

t = 0.557 s

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An airplane is traveling 835 km/h in a direction 41.5 ∘ west of north. Find the components of the velocity vector in the northerly and westerly directions. How far north and how far west has the plane traveled after 2.20 h ?

Answers

I assume the graph is looking like in the picture bellow.

North component:
cos(41.5) * 835 = 625.37 km/h

West component of speed:
sin(41.5) * 835 = 553.29 km/h

After 2.2 hours plane will fly:
2.2*625.37 = 1375.81 km north
2.2*553.29 = 1217.23 km west

Final answer:

To find the components of the velocity vector, you can use trigonometry. The north component is calculated using the sine function and the west component is calculated using the cosine function. After 2.20 hours, the distance traveled north and west can be found by multiplying the velocity components by the time.

Explanation:

To find the components of the velocity vector in the northerly and westerly directions, we can use trigonometry. The velocity vector is 835 km/h and is traveling in a direction 41.5° west of north. To find the north component, we can use the sine function: North component = velocity * sin(angle). To find the west component, we can use the cosine function: West component = velocity * cos(angle).

After 2.20 hours, we can find the distance traveled north and west by multiplying the velocity components by the time: Distance north = North component * time and Distance west = West component * time.

Let's calculate the values:

North component = 835 km/h * sin(41.5°)
West component = 835 km/h * cos(41.5°)
Distance north = North component * 2.20 h
Distance west = West component * 2.20 h

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How do you define 'heat' and 'temperature'

Answers

Temperature -a measure of the average kinetic energy of the individual particles in an object

Heat is the movement of thermal energy from a substance of higher temperature to a substance of lower temperature

Answer:

Heat and temperature are related but very different.

Explanation:

Heat: The total energy of molecular motion in a substance

Temperature: A measure of the average energy of molecular motion in a substance

For further help:

Examples

Heat Temperature

-Heat is a form of energy that can -The degree of hotness and

transfer from hot body to cold body coldness of the body

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-Heat flows from hot body to cold -It rises when heated and falls down

body when an object is cooled down

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-Total kinetic energy and potential -Temp. is the average kinetic

energy obtained by molecules in energy of molecules in a

an object substance

NASA scientists suggest using rotating cylindrical spacecraft to replicate gravity while in a weightless environment. Consider such a spacecraft that has a diameter of d = 148 m. What is the speed v, in meters per second, the spacecraft must rotate at its outer edge to replicate the force of gravity on earth?

Answers

The speed of the spacecraft at its outer edge is 26.93 m/s.

The given parameters;

diameter of the spacecraft, d = 148 m
radius of the spacecraft, r = 74 m

The speed of the spacecraft at its outer edge is calculated as follows;

$F_g = F_c\n\nmg = (mv^2)/(r) \n\nv^2 = rg\n\nv = √(rg) \n\nv = √((74)(9.8)) \n\nv = 26.93 \ m/s$

Thus, the speed of the spacecraft at its outer edge is 26.93 m/s.

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Answer:

Explanation:

Given

diameter of spacecraft $d=148\ m$

radius $r=74\ m$

Force of gravity $F_g$ =mg

where m =mass of object

g=acceleration due to gravity on earth

Suppose v is the speed at which spacecraft is rotating so a net centripetal acceleration is acting on spacecraft which is given by

$F_c=(mv^2)/(r)$

$F_c=F_g$

$(mv^2)/(r)=mg$

$(v^2)/(r)=g$

$v=√(gr)$

$v=√(1450.4)$

$v=38.08\ m/s$

A certain part of the electromagnetic spectrum ranges from 200 nm to 400 nm. What is the lowest frequency associated with this portion of the spectrum?

Answers

Answer:

the lowest frequency is $7.5* 10^(14) Hz$

Explanation:

In the question it is given that wavelength(L) in the range of 200μm to 400μm.

let ν be frequency of wave v velocity = 3\times 10^8

velocity v= Lν

therefore ν= $(v)/(L)$

frequency ν be lopwest when L will be heighest

ν(lowest)= $(3* 10^8)/(400* 10^-9)$

ν= $7.5* 10^(14) Hz$

Name at 2 areas of physics that make video games possible

Answers

Answer:

projectiles

electromagnetic

Answer:

Explanation:

física cuántica y Quantum Moves

(a) Is the velocity of car A greater than, less than, or the same as thevelocity of car B?
(b) Is the initial position of car A greater than, less than, or equal to the
initial position of car B?
(c) In the time period from t = 0 tot = 1 s, is car A ahead of car B,
behind car B, or at the same position as car B?

Answers

a. ) Is the velocity of car A less than the velocity of car B b. the initial position of car A greater than the initial position of car B c. ahead In the time period from t = 0 tot = 1 s, is car A ahead of car B?.

what is velocity ?

Velocity is the parameter which is different from speed, can be defined as the rate at which the position of the object is changed with respect to time, it is basically speeding the object in a specific direction in a specific rate.

Velocity is a vector quantity which shows both magnitude and direction and The SI unit of velocity is meter per second (ms-1). If there is a change in magnitude or the direction of velocity of a body, then it is said to be accelerating.

Finding the final velocity is simple but few calculations and basic conceptual knowledge are needed.

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Answer:

a. less than, b. greater than, c. ahead

Explanation:

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