Aman tosses a dart upward with a velocity of 14.1 m/s at 60° angle.
How much time is it aloft?
What is its max height and range?

Answer:

[tex]s = 414.7 m\\[/tex]

Explanation:

The relationship between the linear distance covered by an object and its angular displacement is given by the following formula:

s = rθ

where,

s = distance traveled on road = ?

r  radius of tires = diameter/2 = 2.2 m/2 = 1.1 m

θ = angular displacement = (60 rev)(2π rad/1 rev) = 377 rad

Therefore,

[tex]s = (1.1 m)(377 rad)\\s = 414.7 m[/tex]

Answer:

v = 47.85 m / s ,   θ = 64.7º

Explanation:

This is a missile throwing exercise.

Let's find the speed to reach the maximum height, at this point the vertical speed is zero

        [tex]v_{y}^{2}[/tex] = v_{oy}^{2} - 2 g y

         0 = v_{oy}^{2} - 2gy

        v_{oy} = √2gy

let's calculate

        v_{oy} = √ (2 9.8 21.3)

        v_{oy} = 20.43 m / s

now we can calculate the time it takes to get to this point

      vy = v_{oy} - g t

       t = v_{oy} / g

       t = 20.43 / 9.8

       t = 2.08 s

in projectile launching, the time it takes for the body to rise is the same as the time it takes to go down, so the total launch time is

     [tex]t_{v}[/tex] = 2 t

     t_{v} = 2 2.08 = 4.16 s

let's use the horizontal throw ratio

      x = v₀ₓ t_{v}

      v₀ₓ = x / t_{v}

      v₀ₓ = 180 / 4.16

      v₀ₓ = 43.27 m / s

initial velocity is

      v = √ (v₀ₓ² + v_{oy}^{2})

      v = √ (20.43² + 43.27²)

      v = 47.85 m / s

with an angle of

      tan θ = I go / vox

      θ = tan⁻¹ (43.27 / 20.43)

      θ = 64.7º

Answer: 18o degrees

Explanation:  :)

The planet should move across the sky when completing one revolution around the Sun is 180 degrees.

Planets are large, spherical celestial objects that are neither stars nor their leftovers. The nebular hypothesis, which states that an interstellar cloud collapses out of a nebula to create a young protostar orbited by a proto-planetary disk, is the best theory currently available for explaining planet formation.

More than 5,000 exoplanets, as they are known, were found as a result of further astronomical advancements. These consist of hot Jupiter's, which are enormous planets that revolve around their parent.

The steady accumulation of matter accelerated by gravity, or accretion, is how planets expand within this disk. There are at least eight planets in the Solar System, including the gigantic planets Jupiter, Saturn, Uranus, and Neptune as well as the terrestrial planets Mercury, Venus, Earth, and Mars.

Therefore, the planet should move across the sky when completing one revolution around the Sun is 180 degrees.

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Answer:

Glucose

Explanation:

Answer:

Check in your science textbook

Answer: an element is a substance that cannot be broken down. it can’t be chemically decomposed into a different substance. elements are made up of just one atom

Explanation:

Answer:

a) t = 6.62 s

b) x = 238.6 m

c) H = 53.7 m

Explanation:

a) We can find the time of flight as follows:

[tex] y_{f} = y_{0} + v_{0_{y}}t - \frac{1}{2}gt^{2} [/tex]

Where:

[tex]y_{f}[/tex] is the final height = 0

[tex]y_{0}[/tex] is the initial height = 0

[tex]v_{0_{y}}[/tex] is the initial vertical velocity of the stone

t: is the time

g: is the gravity = 9.81 m/s²

[tex] v_{0}sin(42)t - \frac{1}{2}gt^{2} = 0 [/tex]      

[tex] 48.5 m/s*sin(42)*t - \frac{1}{2}9.81 m/s^{2}*t^{2} = 0 [/tex]  

By solving the above quadratic equation we have:  

t = 6.62 s

b) The maximum range is:

[tex] x = v_{0_{x}}t = 48.5 m/s*cos(42)*6.62 s = 238.6 m [/tex]

c) The maximum height (H) can be found knowing that at this height the final vertical velocity of the stone is zero:

[tex] v_{f_{y}}^{2} = v_{0_{y}}^{2} - 2gH [/tex]  

[tex] H = \frac{v_{0_{y}}^{2} - v_{f_{y}}^{2}}{2g} = \frac{(48.5 m/s*sin(42))^{2} - 0}{2*9.81 m/s^{2}} = 53.7 m [/tex]

I hope it helps you!

Answer:

A- Katie has been conditioned

Explanation:

Katie has associated the ice cream truck music with something positive like ice cream that makes her happy. it's kinda like a dog clicker, whenever a dog hears the click they know that click means a treat, which is the same for Katie, ice cream jingle means treat.

Answer:

I think

Explanation:

the brain grows more when you learn something new, and less when you practice things you already know. i think- lol

Explanation:

Step one:

given dara

mass of ball m=0.kg

initial velocity u= 10 m/s

final velocity v=10m/s

Required

momentum before and after impact

the expression for momentum P

P=mv

before impact

P=mv

P1=0.5*10

P1=5(kg⋅m/s)

after impact

P=mu

P2=0.5*10

P2=5(kg⋅m/s)

change  in momentum is =P1-P2= 5-5=0

yes, momentum is conserved.

Answer:

2613.3 pa

Explanation:

p=F/A

p=ma/A

p=200×9.8/0.75

p=2613.3

Answer:

Linear velocity is speed in a straight line (measured in m/s) whileangular velocity is the change in angle over time (measured in rad/s, which can be converted into degrees as well).

Explanation:

hope this helps :)

Answer:

What is the magnitude of the centripetal acceleration of a car following a curve of radius 500 m at a speed of 25.0 m/s (about 90 km/h)? Compare the acceleration with that due to gravity for this fairly gentle curve taken at highway speed. See Figure 2a.

Strategy

Because v and r are given, the first expression in

a

c

=

v

2

r

;

a

c

=

r

ω

2

a

c

=

v

2

r

;

a

c

=

r

ω

2

is the most convenient to use.

Solution

Entering the given values of v = 25.0 m/s and r=500 m into the first expression for ac gives

a

c

=

v

2

r

=

(

25.0

m/s

)

2

500

m

=

1.25

m/s

2

a

c

=

v

2

r

=

(

25.0

m/s

)

2

500

m

=

1.25

m/s

2

.

Discussion

To compare this with the acceleration due to gravity (g = 9.80 m/s2), we take the ratio of

a

c

g

=

(

1.25

m/s

2

)

(

9.80

m/s

2

)

=

0.128

a

c

g

=

(

1.25

m/s

2

)

(

9.80

m/s

2

)

=

0.128

. Thus, ac=0.128 g and is noticeable especially if you were not wearing a seat belt.

Explanation:

Answer:

c. √2T

Explanation:

The period of a simple pendulum is given by;

[tex]T = 2\pi \sqrt{\frac{L}{g} } \\\\\frac{T}{2\pi} = \sqrt{\frac{L}{g}} \\\\\frac{T^2}{4\pi^2} = \frac{L}{g}\\\\\frac{g}{4\pi^2} = \frac{L}{T^2}\\\\ \frac{L_1}{T_1^2}= \frac{L_2}{T_2^2}\\\\T_2^2 = \frac{L_2T_1^2}{L_1}\\\\L_2 = 2L_1\\\\ T_2^2 = \frac{2L_1T_1^2}{L_1}\\\\ T_2^2 =2T_1^2\\\\T_2 = \sqrt{2T_1^2}\\\\T_2 = T_1\sqrt{2}[/tex]

Thus, the the new period will be √2T

Answer:

Atoms of elements in the same group of the periodic table share the same ELECTRONS

Explanation:

May I have brainliest please? :)

Answer:

Explanation:

read the assignment and use this

Topic sentence

Evidence from the text

Thoughts in your own words

Opinion

Wrap up sentence

T

E

T

O

W

and 2 of those make 2 paragraphs

Answer:

Andromeda galaxy

Explanation:

Answer:

Andromida galaxy

Explanation:

In 4 billion years the milky way and the Andromida galaxy will collide with each other

Answer:it would probably be C

Explanation:

Explanation:

a fluorine atom has nine protons and electrons so it is electrically neutral

Answer:

no bloody idea

Explanation:

???

Answer:

Explanation:

Step one:

given data

let the mass of the rider be m,=110kg

let the velocity be v=?

let the mass of the car be M,=110kg

let velocity of the car V=6m/s

Step two:

the momentum of an object is given by the expression

P=mv

Step two:

since the two the bicycle rider must have the same momentum as the car,

then we need to equate their momentum

mv=MV

110*v=1400*6

110v=8400

divide both sides by 110 to find v

v=8400/110

v=76.36m/s

The rider is expected to have a speed of 76.36m/s

Answer:

[tex]L^2(\dfrac{8m}{3}+m_r)[/tex]

Explanation:

m = Mass of each rod

L = Length of rod = Radius of ring

[tex]m_r[/tex] = Mass of ring

Moment of inertia of a spoke

[tex]\dfrac{mL^2}{3}[/tex]

For 8 spokes

[tex]8\dfrac{mL^2}{3}[/tex]

Moment of inertia of ring

[tex]m_rL^2[/tex]

Total moment of inertia

[tex]8\dfrac{mL^2}{3}+m_rL^2\\\Rightarrow L^2(\dfrac{8m}{3}+m_r)[/tex]

The moment of inertia of the wheel through an axis through the center and perpendicular to the plane of the ring is [tex]L^2(\dfrac{8m}{3}+m_r)[/tex].

Answer:

The number of turns in the secondary coil is 62,500 turns.

Explanation:

Given;

power of the transformer, P = 460 W

output voltage, V₂ = 15 kV = 15,000 V

input voltage of normal household outlet, V₁ = 120 V

number of turns in the primary coil, N₁ = 500 turns

number of turns in the secondary coil, N₂ = ?

Apply the following the transformer equation;

[tex]\frac{N_2}{N_1} = \frac{V_2}{V_1}\\\\N_2 = \frac{V_2}{V_1}*N_1\\\\N_2 = \frac{15000}{120}*500\\\\N_2 = 62500 \ turns[/tex]

Therefore, the number of turns in the secondary coil is 62,500 turns.

Answer:

Explanation:acceleration

If a baseball was thrown with an initial velocity of 14 m/s at an angle above the horizontal. It remained in the air for 2 seconds, then the acceleration of the object would remain constant while the baseball was in the air.

It can be defined as the motion of any object or body when thrown from the earth's surface and follows any curved path under the effect of the gravitational force of the earth.

As given in the problem a baseball was thrown with an initial velocity of 14 m/s at an angle above the horizontal. It remained in the air for 2 seconds.

Thus, If a baseball was thrown with an initial velocity of 14 m/s at an angle above the horizontal. It remained in the air for 2 seconds, then the acceleration of the object would remain constant while the baseball was in the air.

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Answer:

The atmosphere would become warmer

Explanation:

methane absorbs the suns heat, therefore warming the atmosphere. if all the methane from the premafrost melted, would would have a huge large scale global warming, the giant increase of temperature could have devistating effects on all life on our planet.

Answer:

44 m

Explanation:

Given that,

Horizontal velocity of the ball, u = 40 m/s

It is 6 m above the level field.

We need to find the distance covered by the ball when move horizontally before striking the ground. Let it is d.

Firstly, we will find time taken for the ball to hit the ground. Using second equation of motion as follows :

[tex]s=ut+\dfrac{1}{2}at^2[/tex]

Put u = 0 and a = g

[tex]s=\dfrac{1}{2}gt^2\\\\t=\sqrt{\dfrac{2s}{g}} \\\\t=\sqrt{\dfrac{2\times 6}{9.8}} \\\\t=1.1\ s[/tex]

No finding the horizontal distance as follows :

d = ut

d = 40 m/s × 1.1 s

d = 44 m

So, the ball will move 44 m horizontally before striking the ground.

Gravitational potential energy is the energy stored in an object as the result of its vertical position or height. It can be calculated as its weight times the height. This is:

[tex]\boxed{U_g=W\cdot h=mgh}[/tex]

Where:

Solving for the h:

[tex]h=\dfrac{U_g}{mg} = \dfrac{35944\;J}{310\;kg\cdot 9.8\;m/s^2} = 11.8\;m[/tex]

Answer:

Accurate

Explanation:

Accuracy deals with the nearness of the measured values to the true value.

Precision is the ability to reproduce a certain result in a repeated fashion.

The reading is not precise because, the same weight is not reproduced. Different values of weight was reported from each of the measurement process.

Answer:

1620000J

Explanation:

Given parameters:

Resistance  = 24ohm

Current  = 5A

Time  = 45min

Unknown:

Work done = ?

Solution:

Electrical work done is given as the product of power with time;

  Electrical work done  = power x time

     Power  = I²R

 Electrical work done  = I²R x time

Convert the given time to seconds;

          1min  = 60s

          45 min  = 45 x 60  = 2700s

Now,

  Work done  = 5² x 24 x 2700 = 1620000J

Answer: By electromagnetic waves that transfer heat and light energy

Explanation: electromagnetic waves travels through space it cant be radio waves use electromagnetic waves so they can travel through spac too but with the help of  electromagnetic waves.

please give brainliest, tell if right or wrong

Thanks have a good day :)!

Light and heat energy from sun reach earth by electromagnetic waves that transfer heat and light energy.

The electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.

The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.

In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.The position of an electromagnetic wave in an electromagnetic spectrum is characterized by it's frequency or wavelength.They are emitted by electrically charged particles which undergo acceleration and subsequently interact with other charged particles.

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Answer:

Explanation:

aver. velocity = distance over time

                      =          500 miles          

                         3 hours + (33 min. x  1 hr.  )

                                                           60 min.

                     =   500 miles

                          3.55 hours

                     = 140.845 ≈ 141  miles / hour