What is the rabbit's displacement from t = 0s to 3 s?
Answer with two significant digits.

Answer:

A

Explanation:

Detailed balance, i.e. 2nd law of thermodynamics, requires a relationship between absorbing incoming radiation and turning it into heat, versus emitting thermal radiation. A perfect mirror at rest does not absorb any incoming radiation, therefore it is a "whitebody", not a blackbody, and emits no thermal radiation.

Answer:

A.  it reflects most electromagnetic radiation instead of absorbing it.

Explanation:

a p e  x, just took the quiz

[tex] \sf \bullet \: \theta = {60}^{ \circ} [/tex]

[tex] \sf \bullet \:Time \: of \: flight , \: t = 18.5 \: s[/tex]

[tex] \bullet \sf \: Initial \: velocity , \: u[/tex]

[tex] \bf \star\boxed{ \bf t = \dfrac{2u \: sin \theta}{g} }[/tex]

[tex] : \implies \sf 18.5 = \dfrac{2u \: sin60}{10} [/tex]

[tex] : \implies \sf \: 2u \: sin60 = 185[/tex]

[tex]: \implies \sf u = \dfrac{185 \times 2}{ \sqrt{3} \times 2 } [/tex]

[tex]: \implies \sf u = \dfrac{185}{1.73} [/tex]

[tex] \bf: \implies u = 107 \: m {s}^{ - 1} [/tex]

Answer:33

Explanation:

F = frequency

N =  Node count

w = wave lenght

v = wave velocity

L = distance wave traveled

First find wave length of laser

w = (2/(N))*(L)

w = (2/(10))*(8)

w = 1.6

then using (w), find velocity

V =  (w)(F)

V = (1.6)*(108)

V = 288

Plug in V and the new frequency to solve for new node count

F = NV/2L

(600) = (N)*(288) / 2 * (8)

(N) = 33.33

there are 33 nodes

Answer:

Because the "colored" bathroom was 1/2 mile away, and colored people were not allowed to use the white people's bathroom.

Answer:

b

Explanation:

Answer:

B B*

Explanation:

B BBBBB

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Answer:

λ = 300 m

Explanation:

We are given;

Speed; v = 1500 m/s

Frequency; f = 5 Hz.

Formula for wavelength is given by;

λ = v/f

Plugging in the relevant values;

λ = 1500/5

λ = 300 m

The wavelength of the wave will be 300m. The space between two consecutive troughs or crests is understood as the wavelength.

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 given data in the problem is;

v is the speed = 1500 m/s

f  is the frequency= 5 Hz.

λ is the wavelength of the wave=?

The relationship between the wave's wavelength, frequency, and speed is given as

wavelength = speed of wave / frequency

The wavelength of the wave is found as;

[tex]\rm \lambda= \frac{v}{f} \\\\ \rm \lambda= \frac{1500}{5} \\\\ \rm \lambda=300 \ m[/tex]

Hence the wavelength of the wave will be 300m.

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Answer:

the answer is D

Explanation:

Answer:

Ratio D/h of minimum viewing distance to screen height is 16.28

Explanation:

 Given the data in the question;

Rayleigh criterion sin[tex]\theta[/tex] = 1.22 λ/D

D is diameter (5.12 mm) = 5.12 × 10⁻³

λ is wavelength ( 537 nm) = 537 × 10⁻⁹ m

so we substitute

sin[tex]\theta[/tex] = 1.22 × 537 × 10⁻⁹ / 5.12 × 10⁻³

sin[tex]\theta[/tex]  = 655.14 × 10⁻⁹ / 5.12 × 10⁻³

sin[tex]\theta[/tex] = 0.000127957

[tex]\theta[/tex] = sin⁻¹ ( 0.000127957 )

[tex]\theta[/tex] = 0.007331°

now, tan[tex]\theta[/tex] = y/D

y = h/480

so

tan[tex]\theta[/tex] = h/480 / D

h/D = 480 × tan[tex]\theta[/tex]

D/h = 1 / ( 480 × tan[tex]\theta[/tex] )

we substitute in value of [tex]\theta[/tex]

D/h = 1 / ( 480 × tan( 0.007331° ) )

D/h = 1 / ( 480 × 0.00012795 )

D/h = 1 / 0.061416

D/h = 16.28

Therefore, Ratio D/h of minimum viewing distance to screen height is 16.28

Answer:

E = 20 N/C

Explanation:

Given that,

Charge, q = 2 C

Force experience, F = 40 N

We need to find the electric field at that location.

The electric field in terms of electric force is given by :

F = qE

Where

E is the electric field

[tex]E=\dfrac{F}{q}\\\\E=\dfrac{40\ N}{2\ C}\\E=20\ N/C[/tex]

So, the electric field at that location is 20 N/C.

Suppose it takes at least 5 people to push a very heavy box up a 400-cm ramp. If there are actually 6 people there to help push, they could use ramp(s) = 480 cm to get the box moved.

According to newton if there is a object at rest then a physical or non physical thing acting on it and it helps him to move a bit that called the force. It is a vector quantity. It can be measured in newton, dyne.

To calculate the ramp we are using the formula,

s= s₁×(p₂/p₁)

Here we are given,

s₁= The initial length of the ramp. = 400m

p₂= The final number of people. = 6

p₁=The initial number of people. = 5

We have to calculate the final length of ramp.= s cm

Now we put the values in above equation, we get

s= s₁×(p₂/p₁)

Or, s= 400×(6/5)

Or, s=480 cm

From the above calculation we can say that, If there are actually 6 people there to help push, they could use ramp(s) = 480 cm to get the box moved.

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Answer: The dependent Variables include: Size and Types of trees.

The independent Variables include:

geographic elevations that is, valleys and the higher elevations.

Explanation:

The dependent variable simply refers to the variable a researcher tests or measures during an experiment. On the other hand, the independent variable simply refers to the variable that's controlled during an experiment.

Based on the definition above, the dependent variables include the size and the types of trees while the independent variables include the

geographic elevations that is, the valleys and the higher elevations.

Answer:

37.5 J

Explanation:

With work done equation: W=Fs

W=75*0.50=37.5 J

or use mgh=(75)(0.5) which is the same

Answer:

No, it's a cap

Explanation:

Hats have circular or rounded edges all around but with Caps, it has a pointed round front edge

Answer:

a

Explanation:

As an estimate, consider the two objects as particles separated by 7m.

Take the universal gravitational constant G as 6.67 × 10^(-11) Nm²/kg²

The required gravitational force

= [6.67 × 10^(-11) × 1 × 28] / 7²

≈ 3.811428571 × 10^(-11) N

= 3.81 × 10^(-11) N (corr. to 3 sig. fig.)

∴ The answer should be a. 3.81

Answer:

Explanation:

givens

m = 5 kg

a = 9.8

h = 2 m

Formula

PE = m*g*h

Solution

PE = 5 * 9.8 * 2

PE = 98 This does not take sig digs into account. The answer would be 100 if you have to consider significant digits.

A. The vibrations of the fields are perpendicular to the direction in which the wave moves.

An electromagnetic wave moves through electric and magnetic fields, and the movement of the wave can be described as the vibrations of the fields being perpendicular to the direction in which the wave moves, as in option A.

Electromagnetic waves have many applications, including the transmission of information and energy, and they are also used in other technologies such as radio, television, hospitals, wireless communications, and so on. Other different rays, such as microwaves, infrared radiation, visible light, ultraviolet radiation, etc., are used in different fields, such as X-rays for imaging, etc.

Hence, an electromagnetic wave moves through electric and magnetic fields, and the movement of the wave can be described as the vibrations of the fields being perpendicular to the direction in which the wave moves, as in option A.

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Answer:

a survey

Explanation:

how kids like the playground or they do not like it at all

For the first hour, the slope is zero.

After that, the slope is -2 miles per hour.

Answer:

D

Explanation:

Answer:

Object distance means what is the distance between pole and object. Image distance means when image is formed then the distance between pole and image is called image distance. Focal length is the distance between pole and the principal focus of the mirror.

A lens is a clear object, usually made of glass or plastic, which is used to refract, or bend light. Lenses can concentrate light rays (bring them together) or spread them out. Common examples of lenses include camera lenses, telescope lenses, eyeglasses, and magnifying glasses. Lenses are often double lenses, meaning they have two curved sides. A convex lens is rounded outward, while a concave lens curves inward. (A great way to remember this is that a concave lens creates an indent like a cave!)

The image distance can be calculated with the knowledge of object distance and focal length with the help of lens formula. In optics, the relationship between the distance of an image (i), the distance of an object (o), and the focal length (f) of the lens are given by the formula known as Lens formula. Lens formula is applicable for convex as well as concave lenses. These lenses have negligible thickness. It is an equation that relates the focal length, image distance, and object distance for a spherical mirror. It is given as,

1/i + 1/o = 1/f

i= distance of the image from the lens

o= distance of the object from the lens

f= focal length of the lens

Explanation:

Hope it is helpful....

Explanation:

image distance is the image between the pole and the image

Answer:

A. 10023.75 Watts

B. 13.44 horse power

Explanation:

A. Determination of the power in Watts.

We'll begin by calculating the energy of the cheetah. This can be obtained as follow

Velocity (v) = 27 m/s

Mass (m) = 110 kg

Kinetic energy (KE) =?

KE = ½mv²

KE = ½ × 110 × 27²

KE = 55 × 729

KE = 40095 J

Finally, we shall determine the power in Watts. This can be obtained as follow:

Kinetic energy (KE) = 40095 J

Time (t) = 4 s

Power (P) =?

Power = Energy /time

Power = 40095 / 4

Power = 10023.75 Watts

B. Determination of the power in horse power.

Power in Watts = 10023.75 Watts

Power in horse power =?

Recall:

746 Watts = 1 hp

Therefore,

10023.75 Watts = 10023.75 / 746

10023.75 Watts = 13.44 hp

Therefore, the power in horse power is 13.44 hp

Answer:

Due to energy loss while collision ball will not reach to same height while if there is no energy loss then in that case ball will reach to same height

Explanation:

Explanation:

As we know that initially ball is held at height h = 40 cm

So here we can say that kinetic energy of the ball is zero and potential energy is given as

U = mgHU=mgH

now when strike with the ground then its its fraction of kinetic energy is lost in form of other energies

So the ball will left rebound with smaller

Answer:

1. M = 67,422,800,892,977.54 kg

2. r = 15 km

Explanation:

The diameter of the Comet Tempel 1, D = 9.0 km across

The speed with which the dust escapes = 1.0 m/s

1. The escape velocity, [tex]v_e[/tex], is given by the following formula

[tex]v_e = \sqrt{\dfrac{2 \cdot G \cdot M}{R} }[/tex]

Where;

G = The universal gravitational constant = 6.67430 × 10⁻¹¹ N·m²/kg²

[tex]v_e[/tex] = The escape velocity of the debris = 1.0 m/s

M = The mass of the comet from where the debris escapes

From the escape velocity equation, we have;

[tex]M = \dfrac{v_e^2 \cdot R}{2 \cdot G}[/tex]

Plugging in the values for the variables, we get the mass of the comet, 'M', as follows;

[tex]M = \dfrac{1.0^2 \times 9,000}{2 \cdot 6.67430 \times 10^{-11}} \approx 67,422,800,892,977.54 \, kg[/tex]

The mass of the comet, M ≈ 67,422,800,892,977.54 kg

2. When the debris has lost 60% of its initial kinetic energy, we have;

[tex]60\% \, K.E. = 0.6\cdot K.E. = 0.6 \times \dfrac{1}{2} \times m \times v_e^2 = \dfrac{G \cdot M \cdot m}{r}[/tex]

[tex]\therefore \, The \ distance \ of \ debris \ from \ the \ center, \, r = \dfrac{G \cdot M }{0.6 \times \dfrac{1}{2} \times v_e^2 }[/tex]

[tex]r = \dfrac{6.67430 \times 10^{-11} \times 67,422,800,892,977.54}{0.6 \times \dfrac{1}{2} \times 1^2 } = 15,000[/tex]

When the debris has lost 60% of its initial kinetic energy, the distance the debris will be from the comet's center, r = 15,000 m = 15 km

Answer:

Explanation:

By Ohms Law, Voltage = Current * Resistance

Keeping the voltage the same and doubling the resistance, the current will be halved.

So the new current = 1.5/2 = 0.75A

By using Ohms law,  the current will be 0.75A.

Ohm's law states that the current flowing through a resistance is proportional to potential difference across the resistance under constant temperature and pressure conditions. Ohm's law can be expressed as:

V =IR

Here, I = 1.50 AR = R Ωso, V = 1.50 R Now Voltage is same but resistance is doubled so new resistance is

Now, put the values of given data in ohms law formula:

2RI = 1.50 R/ 2R = 0.75A

Hence current is 0.75A

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Answer:

-0.01N

Explanation:

I'm assuming you're asking for the net force of the paper.

0.01N - 0.02N = -0.01N

Answer:

A prism is a clear crystal that refracts light

Explanation: