A bird starts at rest and then accelerates at 2.3 m/s2 North and hits at velocity of 12m/s2 North. How long did the bird fly for?​

Answer:

5s

Explanation:

initial distance: 0 m

distance: ? (we don't know)

initial velocity: 0 m/s

velocity: 30 m/s

acceleration: 6 \(m/s^{2}\)

time: ? (we are looking for)

v = v0 + at

plug the numbers in:

30 = 0 + 6(t)

= 30 = 6t

= t = 5

5s

Answer:The answer is circular orbits I hope this helps

Explanation:

Distance between them is decrease by an element of 0.21

Evaluating :

Two point charges are brought closer together, increasing the force by an element of 22

Let the first force be

F = \(\frac{kq_{1} q_{2} }{r^{2} } ...........1\)

where q₁ q₂ are charges and r is that the distance between  new force                             F' = \(\frac{Kq_{1} q_{2} }{r^{2} } ................2\)

                       divide  equation 1 & 2

\(\frac{F}{F'}\) = \(\frac{r^{2} }{r'^{2} }\)

\(22= \frac{r^{2} }{r'^{2} }\)

r' = \(\frac{r}{\sqrt{22} }\) ≈0.213r

F₁ represents the first electric force between the two point charges.

F₂ represents the new electric force between the 2 point charges.

r₁ represents the first separation distance between the two point charge.

r₂ represents the new separation distance between the 2 point charge.

Distance between them is decrease by an element of 0.21

Electric Force:

The term 'electric force' exists when two or more electric charges are situated at a specific distance. The variation of electrical force with point charge magnitude is a linear one, whereas the variation of electrical force with the separation distance between the charges is an inversely square one.

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Answer:

the final temperature of the gas is 785.18 K

Explanation:

The computation of the final temperature of the gas is shown below:

Here we apply the gas law

= PV ÷ T

Given that

P1 = 1.9 atm

V1 = 24.6 L

T1 = 335 K  

P2 = 3.5 atm

V2 = 31.3 L  

T2 = ?

Now

P1V1 ÷ T1 = P2V2 ÷ T2

(1.9 × 24.6) ÷ 335 = (3.5 × 31.3)/T2

T2 = 785.18 K

hence, the final temperature of the gas is 785.18 K

Answer: D

Explanation: edge

\(\\ \sf{:}\Rrightarrow Q=mc\Delta T\)

\(\\ \sf{:}\Rrightarrow Q=1(4184)(75)\)

\(\\ \sf{:}\Rrightarrow Q=313800J\)

\(\\ \sf{:}\Rrightarrow Q=313.8KJ\)

Answer:

the cross section refers to the way in which it is wound, in general to the circle

circle does not depend on what it has inside

Explanation:

A solenoid is a wire wound in general in a circular shape, even when it is not forced, the cross section refers to the way in which it is wound, in general to the circle and is joined to determine the area

          A = π r²

This circle does not depend on what it has inside, that is, it is the same section in the air, in a liquid or with a solid inside,

Answer:

the last option is correct

Explanation:

Newton's third law of motion , the ground will exact the equal opposite force the rubber ball

Answer:

\(F_t=(4.64i+20j)N\)

Explanation:

Force in this problem is a vector quantity, so:

\(x_1=F_1[cos(\theta_1)]\\y_1=F_1[sin(\theta_1)]\)

and

\(x_2=F_2[cos(\theta_2)]\\y_2=F_2[sin(\theta_2)]\)

For this problem:

\(F_1=30N\\F_2=40N\)

\(\theta_1=180\)°=\(\frac{pi}{2}\)

\(\theta_2=30\)°=\(\frac{pi}{6}\)

The net force (\(F_t\)) is equal to the sum of the forces:

\(F_t=F_a+F_b\\\\F_a=30N[cos(\frac{\pi}{2})i+sin(\frac{\pi}{2})j]\\F_a=30N(-1i+0j)\\F_a=-30Ni\\\\F_b=40N[cos(\frac{\pi}{6})i+sin(\frac{\pi}{6})j]\\F_b=40N(\frac{\sqrt3}{2}i+\frac{1}{2}j)\\F_b=(20\sqrt3i+20j)N\\F_b=(34.64i+20j)N\\\\F_t=[(-30i)+(34.64+20j)]N\\F_t=(4.64i+20j)N\)

Hope that helps.

Answer:

Los objetos A y C tienen cargas del mismo signo (opcion a)

Explanation:

Hay dos tipos de cargas : cargas positivas y cargas negativas.

La Ley de Coulomb dice que la fuerza electrostática entre dos cargas puntuales es proporcional al producto de las cargas e inversamente proporcional al cuadrado de la distancia que las separa, y tiene la dirección de la línea que las une y se cumple que:

Es decir que las cargas de igual signo se repelen, mientras que las de diferente signo se atraen.

Entonces, si se juntan los objetos A y B y se repelen significa que la carga es del mismo signo.

Cuando se acercan los objetos B y C, se repelen. Entonces significa que posee carga de igual signo.

Por lo que podes concluir que los objetos A y C tienen cargas del mismo signo (opcion a)

120 Joules is the work done when a force of 20 Newton is used over a distance 5 meters.

Work done is simply the energy transfer that occur when an object is either pushed or pulled over a certain distance by an external force. It is expressed as;

Work done = Force × distance

Given the data in the question;

To determine the work done, plug the given values into the formula above.

Work done = Force × distance

Work done = 24 kgm/s² × 5m

Work done = 120 kgm²/s²

Work done = 120 J

Therefore, the amount of work done is 120 J.

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Answer: Her test trials had a high level of accuracy but a low level of precision.

Explanation:

Answer:

Her test trials had a high level of accuracy but a low level of precision.

Explanation:

Orbital resonance,called when two or more bodies orbit at multiples of the same orbital period.

In celestial mechanics, an orbital resonance is when two orbiting bodies exert a regular, periodic gravitational impact on one another. This frequently occurs as a result of the two bodies' orbital periods being related by a ratio of two tiny integers.The gravitational influence of the bodies is significantly strengthened by orbital resonances. The majority of the time, this causes an unstable interaction in which the bodies trade momentum and modify their orbits until the resonance vanishes. A resonant system may occasionally be robust and self-correcting, allowing the bodies to stay in resonance. Examples include the 2:3 resonance between Pluto and Neptune and the 1:2:4 resonance of the Jupiter's moons Ganymede, Europa, and Io. Gaps in Saturn's rings are caused by unstable resonances with its inner moons.

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Answer:

D: 4.4m/s

Explanation:

From a known theorem the total work on a body is equal of the variation of kinetic energy:

\(W = \Delta K = K_f-K_i = \frac12 mv_f^2 - \frac12 m v_i^2\)

Taking the first and last step in the chain of equalities and replacing the values we have, we get:

\(5 = \frac12(1)v_f^2 - \frac12(1)(3)^2\\10= v_f^2 -9 \rightarrow v_f^2 = 19 \rightarrow v_f=\sqrt19 \approx 4.4m/s\)

Answer:

3.33 m/s west

Explanation:

East is the positive direction.

400kg*20m/s + 800kg*-15m/s =(400kg+800kg)*v

-4000kgm/s=1200kg*v

v=-3.33

400kg*20m/s + 800kg*-15m/s =(400kg+800kg)*v. -4000kgm/s=1200kg*v and v=-3.33.

Collision, which is also known as impact, is the abrupt, powerful coming together in close proximity of two bodies, such as two pool cues, a golf club and a ball, a hammer and a nail, two railroad cars when linked, or a falling object and a floor.

Two factors—the force and the amount of time the items are in contact—affect the outcome of impact in addition to the characteristics of the two objects' materials.

A hard steel ball dropped on a steel plate will typically rebound to almost the same location from whence it was dropped, while a putty or lead ball would not.

Therefore, 400kg*20m/s + 800kg*-15m/s =(400kg+800kg)*v. -4000kgm/s=1200kg*v and v=-3.33.

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Answer:

so basically what you gotta do is, and then you can do that but you shouldn't do this

The displacement of a car moved 60 km east and 90 km west is 30km and the direction is west.

Displacement is defined as the shortest distance between two points covered by the body.

If we assume origin as the starting point, then distance covered by the car in east direction is =60km

Distance covered by the car in west direction is 90 km.

Since on covering 90km we again pass from the origin, it means that net positive displacement of 60 km is equal to net negative displacement of 60km.

So, remaining 30 km is the distance we moved from our starting point.

Final direction is towards west as net displacement is 30 km in west.

Hence, the displacement is 30 km and the direction is west.

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Answer: the answer is d $19.95

Explanation:

chicken dinner: 6.95 x 3 = 20.85

burger: 5.75

20.85 + 5.75 = 26.6

26.6 divided by 4 (bc theres 4 ppl and the bill needs to be split equally)

26.6/4= 6.65

and since 3 friends are paying him back u gotta do 6.65 x 3 = 19.95

The velocity of the rollercoaster going down the hill is equal to 5.270 m/s.

Given the following data:

To calculate the velocity of the rollercoaster going down the hill:

Mathematically, kinetic energy is calculated by using the formula;

\(K.E = \frac{1}{2} MV^2\)

Where:

Making V the subject of formula, we have:

\(V =\sqrt{\frac{2K.E}{M} }\)

Substituting the given parameters into the formula, we have;

\(V =\sqrt{\frac{2\times 25000}{1800} }\\\\V=\sqrt{27.7778}\)

Velocity, V = 5.270 m/s

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Answer:

I think it is law of inertia or Newton first law

Power is needed for (1) acceleration and (2) lifting the loaded chairs. These two parts can be calculated separately and then added together.

(1) Power for acceleration:

The final speed of the lift is

V=(10 km/h)(1 h×1000 m60 sec×1 km)=2.887 m/s.

Then the power needed is

Pa=12m(V2−V20)/Δt=12(50×250 kg)(2.778 m/s)2=9.6 kW.

(2) Power for lift

Assume that the acceleration is constant (i.e. power supply is constant), its value will be

a=ΔVΔt=2.778 m/s5 s=0.556 m/s2.

Then the vertical lift during acceleration will be

(12at2)×(2001000)=1.36 m.

Hence, the power needed to increase the potential energy of the lift is

Pg=mgΔhΔt=(50×250 kg) (9.89 m/s2)(1.36 m)/(5 s)=3.41 kW.

Then the total Power required is

Ptotal=Pa+Pg=9.6+34.1=43.7 kW.

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Metals, nonmetals, and metalloids are the Periodic Table's three main groups.

Scientists easily look up information about an element, such as its atomic mass and chemical symbol, using the periodic table. This design of the atomic numbers allows scientists to spot patterns in elemental characteristics like electronegativity, ionization energy, and atomic radius.

It is called the periodic table because of the elements' systematic arrangement. You'll see that they are arranged in columns and rows. The vertical columns that go from top to bottom and the horizontal rows that travel from left to right are referred to as Periods and Groups, respectively.

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Answer:3

Explanation: I just took the quiz

The distance between two successive troughs or crests is known as the wavelength There are 3 complete wavelengths are shown in this image.

The distance between two successive troughs or crests is known as the wavelength.  The peak of the wave is the highest point, while the trough is the lowest.

The wavelength is also defined as the distance between two locations in a wave that have the same oscillation phase.

The length of a wave is measured in its propagation direction. The wavelength is measured in meters, centimeters, nanometres, and other units since it is a distance measurement.

Hence Option D is correct. There are 3 complete wavelengths are shown in this image.

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The total mechanical energy of the bicyclist is 1400 J, obtained by adding her potential energy of 720 J and kinetic energy of 680 J. The correct answer is option B.

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To find the current in the resistor, we can use Ohm's Law and the concept of equivalent resistance. Thus, option A is correct.

First, let's calculate the equivalent resistance of the three cells connected in parallel. When resistors are connected in parallel, the reciprocal of the equivalent resistance is equal to the sum of the reciprocals of the individual resistances:

1/Req = 1/R1 + 1/R2 + 1/R3

Given that R1 = R2 = R3 = 22 Ω (internal resistance of each cell), we can substitute the values:

1/Req = 1/22 + 1/22 + 1/22

1/Req = 3/22

Taking the reciprocal of both sides, we find:

Req = 22/3 Ω

Now we can use Ohm's Law to calculate the current (I) in the resistor. Ohm's Law states that the current flowing through a resistor is equal to the voltage across it divided by its resistance:

I = V/R

Given that V = 1.1 V (emf of each cell) and R = 32 Ω (resistance), we can substitute the values:

I = 1.1/32

Calculating this value, we find:

I ≈ 0.034375 A

Therefore, the current in the resistor is approximately 0.034375 A.

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Troposphere, stratosphere, mesosphere, thermosphere and exosphere.

Earth's atmosphere has five major layers.

From lowest to highest, layers are the troposphere, stratosphere, mesosphere, thermosphere and exosphere.

a) What are the conditions in the troposphere?

The atmospheric temperature descends upward with a slope of ~10 K km−1 for dry air and ~7 K km−1 for wet air in troposphere.

The temperature of troposphere decreases with an increase in height.

B) What sort of temperatures would she experience in the stratosphere? What other layer is found within the stratosphere?

The temperature in the stratosphere ranges from- 60° F at the troposphere boundary to -5°F at the top.

The temperature increase is due to the ozone layer that absorbs ultraviolet light from solar radiation.

C)What sort of temperatures would she experience in the mesosphere?

The temperature in the mesosphere ranges from -2.5°C to -90°C

The temperature decreases because of a decrease in the absorption of penetrating solar radiation.

The atmosphere gets cooler with an increase in altitude because an increase in distance from the Earth's surface.

D)What sort of temperatures would she experience in the thermosphere? What other layer is found within the thermosphere?

4,500°F is the temperature of thermosphere.

Temperatures climb sharply in the lower thermosphere , then level off and hold fairly steady with increasing altitude above that height.

Temperatures in the upper thermosphere can range from about 500° C (932° F) to 2,000° C (3,632° F) or higher.

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Answer -:

rate of charge of angular displacement of a circular motion is called angular velocity it is denoted by omega ( ω ) . if particle trave△θ angluar displacement time then

\( \bold {average \: velocity \: } \: \bold{ \frac{angular \: displacement \: }{time} }\)

or

\( \omega \frac{ \triangle \theta}{ \triangle \: t} \)

if t is very small then instantaneous

\( \omega = \lim \: \frac{ \triangle \theta}{ \triangle \: t \: } \)

Answer:

B is your answer

Explanation:

C, D, and A are true and protons are located inside the nucleus and electrons are located outside the nucleus which means B is your answer.

Answer:

I believe the answer is sliding friction