The potential energy of a watermelon is 15.0 J. The watermelon is 3.0 m high. What is the mass of the watermelon?
g = 9.8 m/s2

At aphelion, the Earth is 96% of the Earth-sun distance at aphelion which means that the correct statement is that at aphelion, because the gravitational attraction is lower, the speed of the Earth is higher and is denoted as option B.

This is referred to as the  farthest point in the orbit of a planet such as the earth from the sun.

In a a scenario where the Earth is 96% of the Earth-sun distance at aphelion, then it means that the orbit has almost been completed which means that a high amount of speed was involved in the process.

This is as a result of the gravitational attraction being lower which has an inverse relationship with the speed of the Earth which is why it was higher and is therefore the reason why option B was chosen.

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The canoe's velocity after traveling 32 m is 9.4 m/s.

To find the velocity, we can use the formula:

v = u + at,

where v is the final velocity, u is the initial velocity (assumed to be zero as the canoe starts from rest), a is the acceleration, and t is the time.

In this case, the initial velocity u is 0 m/s, the acceleration a is 0.45 m/s², and the distance traveled d is 32 m. We need to find the final velocity v.

We can rearrange the formula as:

v = √(u² + 2ad).

Since u = 0, the formula simplifies to:

v = √(2ad).

Plugging in the values, we get:

v = √(2 × 0.45 m/s² × 32 m) ≈ 9.4 m/s.

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For the first question, we can use the formula distance = speed × time. Since we want to find the time it takes for the echo to travel to us, we can rearrange the formula to solve for time: time = distance ÷ speed. Plugging in the given values, we get.

time = 1262 ÷ 340 = 3.71 seconds
Therefore, it would take approximately 3.71 seconds to hear the echo of your voice off a cliff wall that is 1,262 meters away. For the second question, we know that the period of a pendulum is the time it takes to complete one full swing. We can use the formula period = time ÷ a number of swings. Plugging in the given values, we get:
To calculate the time it takes to hear the echo of your voice off a cliff wall, we first need to consider that the sound travels to the wall and then back to you. So, the total distance the sound travels is 2 * 1,262 meters.

1. Calculate the total distance the sound travels: 2 * 1,262 m = 2,524 m
2. Use the formula time = distance/speed to find the time it takes to hear the echo.
3. Plug in the values: time = 2,524 m / 340 m/s
4. Calculate the time: time ≈ 7.42 seconds

So, the period of the pendulum is approximately 4.25 seconds.

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Answer:

you to

Explanation:

sleep well and long and thank you for the points

In a stable ecosystem, the number of predators increases if the number of prey increases.

Predators are the species that are dependent upon prey for their foods. predators actually hunt the prey for their food.

predators are the species that depend upon other living species like deer fish goats etc for example lions depend upon deer, zebras, etc.

while the preys are the species who depend upon the plants for their food so if the number of preys will be higher then the number of the predators will also be higher.

Thus In a stable ecosystem, the number of predators increases if the number of prey increases.

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Cell wall is that organelle that gives structure to plant cells. A cell wall is a structural layer that surrounds certain types of cells. It can be hard, flexible, or rigid at times.

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The mass m of the block on the left is 16 Kg , correct answer.

What is friction?

Friction is a force that prevents two solid objects from rolling or sliding over one another. Although frictional forces, such the traction required to walk without slipping, may be advantageous, they can provide a significant amount of resistance to motion.

Think about how a 100 kilogramme block would move.

beginning speed (Vi) = 0 m/s

a stands for speed.

d=displacement=1 m

Time taken is t = 0.53 seconds.

Using the formula:

d=Vi t+(0.5)a t2

1 = (0) (0.53) + (0.5) a (0.53) (0.53)

2

a = 7.12 m/s2

Acceleration for an at wood machine is expressed as

7.12 = (100 - m) (9.8)/ (100 + m)

m = 15.84 kg

m = 16 kg

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Answer:

don't  

Explanation:

The mass of the block is 4.5 kg that falls by 40m and work done is -1800J.

The work done is defined as the product of the displacement of an object and the component of the applied force which is in the direction of the object's displacement.

w=f × s

-1800=f×40

f=45 N

by Newton's 2nd law

F=ma

45=m×(10)

m=45÷10=4.5 kg

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Answer:

3.6 m/s

Explanation:

Answer:

Both are moving at 30 km/h, so their speed is the same. ... enough fuel for the trip/how long it will take. 4 Weight is a force, and so is a vector. ... c At 10 seconds David's displacement is.

Answer:

A force of 355 N is applied to an object that accelerates at a rate of 7.8 m/sec2 . What is the mass of the object ?

Explanation:

Answer:

The standard layout use for new files flat surfaces. etc.

Answer: speed X velocity X inertia

Explanation:

The derived formulas for the final velocity of the carts in elastic collisions are as follows:

Suppose you have a cart of mass m1 and velocity v1i colliding with a cart of mass m2 and velocity v2i, with motion confined to one dimension. If the collision is perfectly elastic, then both momentum and energy are conserved. in this case, the final velocities are:

Calculations;

v1f = (2m1/m1 + m2) × v1i - ( m1 - m2/m1+m2) × v2i                             ....     (1)

v2f = (m1 - m2/m1 + m2) ×v1i + ( 2(m2)/ m1 + m2) × v2i                        ....    (2)

If the collision is totally inelastic, then only momentum is conserved; energy is lost. in this case, the carts end up moving together with one common final velocity:

vf= (m1/ m1 + m2) × v1i + (m2/ m1 + m2) v2i                                         ....    (3)

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(a) The drift speed of electrons in the aluminum wire is 4.34 x 10^-3 m/s.

(b) The mean time between collisions of electrons in the aluminum wire is 4.57 x 10^-14 s.

a) The drift speed of electrons in the aluminum wire can be calculated using the formula:

vd = I / (nAq)

where:

vd = drift speed of electrons

I = current

n = number density of electrons

A = cross-sectional area of the wire

q = charge of an electron

We are given the electric field E, which is related to the current I by:

I = (πd^2/4)J = (πd^2/4)(nAvdq)

where:

d = diameter of the wire

J = current density

n = number density of electrons

A = cross-sectional area of the wire

vd = drift speed of electrons

q = charge of an electron

Combining these two equations, we get:

vd = Eτ/m

where:

τ = mean time between collisions of electrons

m = mass of an electron

(b) The mean time between collisions of electrons can be calculated using the formula:

τ = l / vmean

where:

l = mean free path of electrons

vmean = mean velocity of electrons

The mean free path of electrons can be estimated using the formula:

l = λ/n

where:

λ = mean free path of electrons

n = number density of atoms in the wire

The number density of atoms in aluminum can be estimated using its atomic mass and density:

ρ = m/V = nAm / (N_AV)

where:

ρ = density of aluminum

m = mass of aluminum

V = volume of aluminum

nA = Avogadro's number

A = atomic mass of aluminum

m = density x V

Solving for n, we get:

n = ρN_A / A

Substituting this value in the expression for mean free path, we get:

λ = vmeanτ

Combining these equations, we get:

τ = mλ / kT

where:

k = Boltzmann constant

T = temperature

Plugging in the values, we get:

(a) vd = Eτ/m = (2.0 x 10^-3 V/m)(1.43 x 10^-14 s)/(9.11 x 10^-31 kg) = 4.34 x 10^-3 m/s

(b) τ = mλ / kT = (9.11 x 10^-31 kg)(4.92 x 10^-8 m) / (1.38 x 10^-23 J/K)(293 K) = 4.57 x 10^-14 s

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This lamp's estimated current consumption is 8 amperes.

Electric current is the rate of charge (electron) passing in a conductor. The SI unit for electric current is the ampere. As current does not obey vector addition, it is a scalar quantity.

Given information:

amount of charge flowing through the lamp, Q = 28800 C;

The charge flow time was t = 1 hour = 3600 seconds.

Hence, the current passing through the bulb as a result.

I = Q/t

= 28800/3600 ampere,

= 8 ampere

Therefore, this lamp consumes 8 amperes of current.

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Answer:

ambt kaon✌️jhrhriekeieieieiei

Explanation:

iwuejejwiowksj

Answer: A rolling ball eventually slows down and comes to a stop.

Explanation: Right on Edge2020, not C or B or D.

Answer:

A

Explanation:

Person above me might be right

The rotational inertia of a pencil is greatest about an axis about its midpoint, like a propeller, option B.

""Rotational inertia," also known as "moment of inertia." Rotational inertia is a measure of an object's resistance to changes in its rotational motion, and is defined as the sum of the products of the masses of each particle composing an object and the square of their distances from a chosen axis of rotation.

The larger an object's rotational inertia, the harder it is to get it rotating, or to change its rotational speed.

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Suki can go 0.854 meters to the end before the beam starts to tilt.

Beam length: L = 6.5 m

Beam weight: W b = 336 N

Suki's weight is W s = 590 N.

Suki stands in the middle of the steel beam and moves toward the end. Since the beam is supported by two posts that are spaced three meters apart, the distance she may go before the beam starts to lean is determined by how far she moves from the left support.

Thus;

according to formula

Wb × (3/2) = (Ws × x)

where:

Wb= Beam weight

Ws= Suki's weight

Adding the necessary values results in;

336 × 1.5 = 590 × x

x = (336 × 1.5)/590

x = 0.854 m

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Answer:

A

Explanation:

Answer:

5 km=5 × 10³ m

Explanation:

1 km=1 × 10³ m

Using unitary method,

5 km= 5×10³ m

Hope it helps.

Answer:

Data from a cross-sectional study or survey might need to incorporate weights or design effects in the analysis.The analysis plan should specify which variables are most

Explanation:

Explanation:

For example, scientists on a ship may examine SONAR data collected in real-time to determine the shape of the seafloor (Fig 2.7 A). ... Biologists might graph the number of box jellyfish over time and compare these data to the phases of the moon to look for patterns (Fig 2.7 B).

Answer:

Work done = 838470 Joules.

Explanation:

Given the following data;

Power = 19 hp

Time = 1 minute to seconds = 60 seconds.

Next, we would convert the unit of power in "hp" to "Watt."

1 Watt = 0.00135962 horsepower

x Watt = 19 horsepower

Cross-multiplying, we have;

19 = 0.00135962x

x = 19/0.00135962

x = 13974.5 Watts.

Now, to find the work done in moving the mower;

Work done = power * time

Substituting into the formula, we have;

Work done = 13974.5 * 60

Work done = 838470 Joules.

Answer:

R = -2500N

Explanation:

Use formula ΣF = Ma. We can split the Net Force into two parts: Fe - Ff  =  Ma.

Fe is the force developed by the engine: 4000N

Ff (R) is the air resistance projected on the vehicle. This is the value we're looking for.

Mass: 1000kg

Acceleration: 1.5m/s^2

Next, just plug in the values and solve.

▪4000N - Ff  =  (1000kg)(1.5m/s^2)

▪Ff = 1500N - 4000N

▪Ff = -2500N

R = -2500N.

The air resistance acting on the car is R = -2500N.