A frog jumps up at time t = 0.
Which of the following graphs best shows the velocity u
of the frog from when it jumps until it reaches its highest
point?
Assume upward is the positive direction.

The time , in units of Earth years, for one revolution of the planet around the star is 5.29ears.

Given that orbital radius = 3.7 au, which can be written as 3.7 x 1.496 x 10⁷ in meters.

The mass of the star = 1.80 x mass of on somepin. So we can write this as:

1.80 x 1.989 x 10³⁰ kilogram.

Calculate the t for 1 revolution of the planet around the star. The gravitational force provides centripetal force for a planet. That means capital g, multiplied by capital and multiplied by small m divided by r square =

m x v² ÷ r.

Now, on rearranging this, for v,

v = √capital g x capital ÷ r. Then, time period for revolution will be

t = 2πr ÷ v.

Substitution,

v = √capital g x capital m ÷ r =

t = 2 x π x r/√capital g x a capital lamb /r or

t = 2 x π x r³/ 2, ÷ √capital g x capital m.

Here r is the orbital radius. Capital g is the universal gravitation. k and m is the mass of the star.

t = 2 x π x 3.7 x 1.496 x 10¹¹ to the power 3 ÷ 2/ √6.67 x 10 to the power minus 11.

Multiply by 1.80 x 1.989 x 10 to the power 30

Simplify,

t = 1.67 × 10⁸ seconds. Now we convert this into earth ears, t = 5.29 ears.

Therefore, the correct answer is as given above.

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Answer:

What is the kinetic energy of a bicycle with a mass of 14 kg traveling at a velocity of 3 m/s? Physics ... K=12mv2=12×14 kg × (3 m/s)2=63 Joule.

1 answer  

63 Joule Explanation: K=12mv2=12×14 kg × (3 m/s)2=63 Joule

Explanation:

K=12mv2=12×14 kg × (3 m/s)2=63 Joule.

63 Joule Explanation: K=12mv2=12×14 kg × (3 m/s)2=63 Joule

Answer:

Because the magnetic field created by the electric current in the wire is changing directions around the wire, it will repel both poles of the magnet by bending away from the wire.

Explanation:

Answer:

1.) Q T U W 

Explanation:

1.) QTUW

2.) UW

3.) QU

4.) QTUC

According to first law of thermodynamics

dU = Q - W

Where

dU = change in internal energy

Q = heat added

W = work done by the system

2.) UW

Work is been done on the system. The pressure will surely distort the internal energy of the system

Pressure = Force/area.

3.) QU

The melting process begins because the air temperature around the ice cubes is warmer

The solid ice particles absorb heat energy from the warmer air, giving the particles energy and enabling them to move away from one another.

4.) Chemical reaction can be exothermic or endothermic which involves absorption or release of heat. Since it is subjected to small spark, there is definitely a change in internal energy.

In this exercise we have to have knowledge about thermodynamics in order to identify the alternatives that are correctly classified, so we can say that:

1.) QTUW

2.) UW

3.) QU

4.) QTUC

According to first law of thermodynamics:

\(dU = Q - W\)

Where:

1.) The first alternative corresponds to:

In other words QTUW.

2.) The second alternative corresponds to:

Work happen been finished ahead of the system. The pressure will without doubt deform the internal strength of bureaucracy:

\(Pressure = Force/area\)

In other words UW.

3.) The third alternative corresponds to:

The softening process begins cause the air coldness of some degree around the frozen water cubes happen warmer The complete frozen water particles take in heat strength from the warmer air, bestowing the piece energy and allowing to happen them to move out each one.

In other words QU.

4.) The fourth alternative corresponds to:

Chemical reaction maybe exothermic or endothermic that involves assimilation or release of heat. Since it happen commit small spark, skilled happen certainly a change in within strength.

In other words QTUC

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Answer:

William Gilbert

Explanation:

first described the Earth as a giant dipole magnet 400 years ago. But, as Rod Wilson recounts, he did far more than this.

Answer:

william gilbert

Explanation:

first described the Earth as a giant dipole magnet 400 years ago. But, as Rod Wilson recounts, he did far more than this.

Answer:

Mass and Acceleration

Explanation:

The typical Force equation is:

F = ma

where m = mass, and a=acceleration.

Answer:

Gravity is the main force responsible for mass movements. Gravity is a force that acts everywhere on the Earth's surface, pulling everything in a direction toward the center of the Earth

Explanation:

Answer:

c) A soccer ball bouncing off a wall should be the correct answer :)

Answer:

D) all of the above

Explanation:

The focal length of the concave mirror is approximately option B. 8.20 cm,

To solve this problem, we can use the mirror equation, which relates the object distance (d_o), image distance (d_i), and the focal length (f) of a concave mirror. The equation is:

1/f = 1/d_o + 1/d_i

Given the object distance (d_o) is 12.2 cm and the image distance (d_i) is 25.0 cm, we can plug in these values to find the focal length (f):

1/f = 1/12.2 + 1/25.0

To solve for f, first find the common denominator and combine the fractions:

1/f = (25 + 12.2) / (12.2 * 25) = 37.2 / 305

Now, take the reciprocal of both sides to isolate f:

f = 305 / 37.2

After calculating, we get:

f ≈ 8.20 cm

Thus, the focal length of the concave mirror is approximately 8.20 cm, Therefore the correct option to option b.

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Answer:

Explanation:

A. To find the speed of the 6.0 kg ball after the collision, we can use the principle of conservation of momentum. The total momentum of the system before the collision is equal to the total momentum after the collision.

Momentum before collision = Momentum after collision

m1v1 + m2v2 = (m1 + m2)vf

where:

m1 = 2.0 kg (mass of first ball)

m2 = 6.0 kg (mass of second ball)

v1 = 12 m/s (velocity of first ball)

v2 = 4.0 m/s (velocity of second ball)

vf = final velocity of the combined balls after collision

Since the 2.0 kg ball moves in the opposite direction with a speed of 8.0 m/s after the collision, and the total mass of the two balls is 8.0 kg, we can write:

vf = (m1v1 + m2v2) / (m1 + m2) = (2.0 kg x (-8.0 m/s) + 6.0 kg x 4.0 m/s) / 8.0 kg = 2.33 m/s

So the speed of the 6.0 kg ball after the collision is 2.33 m/s.

B. To find the KE for each ball before and after the collision, we can use the formula:

KE = 0.5mv^2

where:

m = mass of the ball

v = velocity of the ball

For the 2.0 kg ball, the KE before and after the collision is:

KE before = 0.5 x 2.0 kg x (12 m/s)^2 = 72 J

KE after = 0.5 x 2.0 kg x (8.0 m/s)^2 = 32 J

For the 6.0 kg ball, the KE before and after the collision is:

KE before = 0.5 x 6.0 kg x (4.0 m/s)^2 = 48 J

KE after = 0.5 x 6.0 kg x (2.33 m/s)^2 = 20.44 J

C. To find the amount of KE that is lost during the collision, we can subtract the total KE after the collision from the total KE before the collision:

KE lost = KE before - KE after = (72 J + 48 J) - (32 J + 20.44 J) = 40.56 J

So the amount of KE that is lost during the collision is 40.56 J.

Answer:so that's C

Explanation:

Wave speed equals frequency*wavelength. So doubling the frequency must halve the wavelength in order for wave speed to remain the same

Answer:

D. Evaporation

Explanation:

Just did it made 100%

Answer:

As the pressure inside the pressure cooker increases as it is heated, the temperature also increases.

Explanation:

A pressure cooker contains water and steam in equilibrium at a pressure greater than atmospheric pressure.

According to the ideal gas law, as the pressure increases, the temperature also increases.

As the pressure inside the pressure cooker increases as it is heated, the temperature also increases.

Designed and developed by private companies: Commercial satellite.

Used to access electronic intelligence: Reconnaissance satellite.

Used to make strategic decisions in advance: Early warning satellite.

Used to assist in strike planning: Reconnaissance satellite.

Remote sensing: Commercial satellite.

Commercial Satellite are designed and developed by private companies and are primarily used for commercial purposes. They can provide a wide range of services, including telecommunications, broadcasting, internet connectivity, and navigation. Commercial satellites are often operated by companies like SpaceX, OneWeb, or Iridium.

Reconnaissance satellites are used to gather information about a specific area or target. They are equipped with advanced imaging systems, such as high-resolution cameras or synthetic aperture radar (SAR), which allow them to capture detailed images or collect other types of data for military or intelligence purposes.

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Answer:

The metallic conductors

Explanation:

The metallic conductors has more free electrons that are movable, thus they conduct electricity better.

The distance the ball was thrown is 52.22m by A quarterback throws a pass at an angle of 35° above the horizontal with an initial speed of 25 m/s. The ball is caught by the receiver 2.55 seconds later.

Every motion under constant acceleration is projectile motion

Angle above horizontal Ф = 35°, initial speed v1 = 25m/s , time 2.55s

Substituting value in the below equation

x=x₁ + (v₁*cosθ)(t)+1/2 *a*t²

a= 0 as acceleration in horizontal direction is zero

x= 25*cos(35)*2.55

x=52.22 m

Projectile motion is a form of motion in which object influenced when it is launched into the gravitational force from the surface of Earth along a curved path.

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Answer:

Second Option

Explanation:

The "hard drive" or the second option is one of the main components of storing information on a computer. You already have a hard drive built into your computer, or laptop when you buy it, and you can buy additional hard drives in the form of plugins that can store even more data if your original hard drive becomes full of data.

Hope this helps.

Answer:

B

Explanation:

Whereas memory refers to the location of short-term data, storage is the component of your computer that allows you to store and access data on a long-term basis. Usually, storage comes in the form of a solid-state drive or a hard drive.

Answer:

28.1 degrees

Explanation:

Use formula: \(N_1Sin(Angle_1) = N_2Sin(Angle_2)\)

* use angles given

15.9 N

Explanation:

Let's assume that the downward direction on the inclined is the (+)-direction. Since the block is in equilibrium, the x-component of its weight is pointing in the +x-direction and the frictional force \(f_s\) is pointing up the incline. So the net force acting parallel to the incline can be written as

\(mg\sin36 - f_s = 0 \Rightarrow \mu N = mg\sin36\)

where N is the normal force.

The net force perpendicular to the incline can be written as

\(N - mg\cos36 = 0 \Rightarrow N = mg\cos36\)

or

\(N = (2\:\text{kg})(9.8\:\text{m/s}^2)\cos36 = 15.9\:\text{Newtons}\)

An example of a physical change of matter is (c) Melting ice.

Explanation: Melting ice is an example of a physical change of matter. When ice melts, it undergoes a change in state from a solid to a liquid, but its chemical composition remains the same. The water molecules in ice rearrange themselves to form liquid water, but no new substances are formed. This change can be reversed by cooling the liquid water to below its freezing point, causing it to solidify back into ice. Physical changes do not involve a change in the chemical identity of the substance, only a change in its physical properties, such as shape, size, or state.

In contrast, options a) Burning wood, b) Digesting food, and d) Rusting iron involve chemical changes. Burning wood involves a chemical reaction where wood reacts with oxygen to produce carbon dioxide, water vapor, and ash. Digesting food involves the breakdown of complex molecules into simpler ones through chemical reactions in the body. Rusting iron is a chemical reaction where iron reacts with oxygen and moisture in the air to form iron oxide.

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Note: The complete question is:

Which of the following is an example of a physical change of matter?

a) Burning wood

b) Digesting food

c) Melting ice

d) Rusting iron

Answer:

it is energy resulting in charged particles

Electricity a form of energy resulting from the existence of charged particles (such as electrons or protons), either statically as an accumulation of charge or dynamically as a current

The astronomy of the star and the parameters of the star in terms of solar units are;

Radius of the star ≈ 5.03 \(R_{Sun}\)

Temperature of the star ≈ 0.92 \(T_{Sun}\)

Luminosity of the star ≈ 18 \(L_{sun}\)

The astronomical system of units are a special class of units designed for astronomy.

First part;

One solar radius is specified as \(R_{Sun}\) = 6.9551 × 10⁵ km

The radius of the star = 3.50 × 10⁶ km

The radius of the star in units of the solar radius is therefore;

Second part;

One unit of the solar temperature, \(T_{Sun}\) = 5777 K

The temperature of the star = 5305 K

The stars temperature in units of the solar temperature, is therefore;

Temperature = 5305 K/(5777 K) ≈ 0.92

Third part;

The function for the luminosity of a star, L, is; L = 4·π·R²·σ·T⁴

The luminosity of the star = 4 × π × (3.50 × 10⁶)² × σ × 5305⁴

The luminosity of the Sun = 4 × π × (6.9551 × 10⁵)² × σ × 5777⁴

The solar luminosity of the star = (4 × π × (3.50 × 10⁶)² × σ × 5305⁴) ÷ (4 × π × (6.9551 × 10⁵)² × σ × 5777⁴) ≈ 18

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Hi there!

When the ball reaches the highest point of its trajectory, it is experiencing an acceleration due to gravity of 9.8 m/s² DOWNWARD.

Keep in mind, the ball is experiencing this downward acceleration at ALL points of its trajectory, resulting in a change in its VERTICAL velocity.

Answer:

3.91 s

Explanation:

d = -75

a = -9.81

d = 1/2 at^2

-75 = 1/2 ( -9.81) (t^2)

75 = 1/2 ( 9.81) t^2            shows t = 3.91 s

Answer: If the other two frequencies are F and F1 then;

F-364=2

F=364+2

F=366Hz

364-F1=2

F1=364-2

F1=362Hz

Hence the two possible frequencies are 362Hz and 366Hz

Explanation:

Two tuning forks struck simultaneously produce a beat.  The two possible frequencies of the other tuning fork are 366 Hz and 368 Hz.

Beat frequency is the difference between the frequencies of the two tones interacting with each other.

Given is the beat frequency of 2 Hz and the frequency of one fork is 364 Hz.

The frequency of other tuning fork will be

f2 -f1 = 2 Hz

f2 = 2 +364

f2 = 366 Hz

The other one is 366 +2 Hz = 368 Hz.

Therefore, the two possible frequencies of the other tuning fork are 366 Hz and 368 Hz.

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Explanation:

after rereading: Yes, there is a term for water on the moon and it's called lunar water, pretty straightforward. you can check out moon.nasa.gov, or literally look this up in the magical (g-engine) and it'll gove you a few articles.

______________________

oh my, sorry, i thought the question asked if the moon moved water, in which case: I wouldn't say that the moon actually MOVES the water, but yes, its gravitational force is strong enough to affect tides on Earth. (i could've sworn that's what I saw but whatever, sorry!)

Answer:

2.4 m/s

Explanation:

Applying,

The law of conservation of momentum

Total momentum before collision = Total momentum after collision

mu+m'u' = mv+m'v'.................... Equation 1

Where m = mass of the moving puck, m' = mass of the stationary puck, u = initial velocity of the moving puck, u' = initial velocity of the stationary puck, v = final velocity of the moving puck, v' = final velocity of the stationary puck.

make v' the subject of the equation

v' = (mu+m'u'-mv)/m'................ Equation 2

From the question,

Given; m = 3 kg, m' = 2 kg, u = 2 m/s, u' = 0 m/s (stationary), v = 0.4 m/s

Substitute these values into equation 2

v' = [(3×2)+(2×0)-(3×0.4)]/2

v' = (6-1.2)/2

v' = 4.8/2

v' = 2.4 m/s

\(a = \displaystyle\frac{v-u}{t}\)

\(-3 = \displaystyle\frac{v - 30}{3}\)

\(v -30 = -9\)

\( v = 21 m/s\)

Answer:21

Explanation:

Biomass energy refers to energy that is derived from organic matter, such as wood, crop residues, and even municipal solid waste. This organic matter can be replenished through biogeochemical cycles.

Organic products, such as fruits, vegetables, meat, and dairy, are grown or raised without the use of synthetic chemicals, fertilizers, or hormones. Organic certification is granted by regulatory bodies that ensure that the products meet strict organic standards.

In addition to its benefits for the environment and personal health, organic farming and food production also promote animal welfare and sustainable agriculture practices. However, organic products may be more expensive than conventionally grown products due to the increased cost of production and certification.

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Answer:

There is much more friction on the rough surface than there is on the smooth surface.

Explanation: