The Italian greyhound jumps 0.85 m in the air to catch a frisbee. How much potential energy does the dog have at the height of its jump?

The speed of the water balloon dropped out of a dorm window 17 m above the ground when it hits the ground is 18.25 m / s

v² = u² + 2 a s

v = Final velocity

u = Initial velocity

a = Acceleration due to gravity

s = Displacement

d = 17 m

a = 9.8 m / s²

u = 0

v² = 0 + ( 2 * 9.8 * 17 )

v² = 333.2

v = 18.25 m / s

The equation used to solve the problem is an equation of motion. An equation of motion is used to describe the position of an object in motion with constant acceleration.

Therefore, the speed of the water balloon when it hits the ground is 18.25 m / s

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Yes, more centripetal force is required to to sustain an object in circular motion that is moving at a greater velocity.

Answer:

Explanation:

Force:

Fₙ = m*V² / R

m - const

R - const

V ↑

Fₙ ↑

Resistance of copper wire with four times the diameter is 3.23 Ω.

Formula of resistance is, R= ρl/A.

where, ρ = Resistivity of material

            l = Length of material

            A= area of material

In first case, resistance of Copper conductor = 0.202 Ω

0.202 = ρ × l /πr²

0.202 = ρ × l/ π (d/2)²                            …equation 1

In second case, let resistance of copper conductor where diameter is four times be R'

R' = ρ × l /π (d/8)²                                   …equation 2

upon substituting value of equation 1 in 2,

R' = 0.202 × 16

R' = 3.23 Ω

Hence, Resistance of copper conductor with four times diameter is 3.23 Ω

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The gravitational potential energy depends on the altitude, more altitude means more potential energy. But, equal altitude means equal potential energy.

By definition we have that:

Melting: A change from solid to liquid

Sublimation: A change from solid to gas

Condensation: A change from gas to liquid.

Vaporization: A change from liquid to gas

Mass does not change thus the object would have the same mass in ay planet or the moon.

What is the mass?

We need to look at the mass of the body as the quantity of matter that we can find in the body. This implies that the more of matter that we can find in a particular object, the more the mass of the object. It is also possible to define the mass as the quantity of the inertia in an object. These are the basic ways that the mass of the object could be considered or understood in this case.

We know that the mass of the object does not change. This is because the quantity of the matter that an object has is not going to change no matter where the object is found whether on the earth or in the moon.

Having said this, we can now agree that the mass of the object would stay the same both on earth and in the moon.

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The coefficient of linear expansion, given that the length of the pipe increased by 1.5 cm is 1.67×10¯⁵ /°F

From the question given above, the following data were obtained

The coefficient of linear expansion can be obtained as illustrated below:

α = ∆L / L₁∆T

α = 0.015 / (10 × 90)

α = 0.015 / 900

α = 1.67×10¯⁵ /°F

Thus, we can conclude that the coefficient of linear expansion is 1.67×10¯⁵ /°F

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Given:

car is parked ouphill on a sloped street.

To draw the free body diagram.

Explanation:

he ffree-bodydiagram of the car is shown below.

Here, W is the force due to gravity which is its weight.

There is a frictional force, f acting towards the slope.

N is the normal force.

The car will remain at rest if no force is acting on the body.

The weight can be resolved into sine and cosine components.

The horizontal component of weight cancels out the normal force and the vertical component of weight cancels the frictional force.

Thus, the car is at rest as no net force is acting on it.

3.86×10^11 molecules of gas remain in the tube

P = nkT

n = P/kT

= hdg/kT

Number of molecules in the electron tube is = n×V = hdgV/kT

⟹n = hdg/kT

=

1.2×10^−10 ×13600 × 9.8 × 100 × 10^−6/1.38×10^−23 × 300

= 3.86×10^11

The small rocket will be take time 1296 sec.

We are given that,

The thrust of the rocket  = F = 35N

The velocity of the rocket = v = 0.63m/s

The mass of the satellite = m = 72000kg

Therefore , to get time t of the rocket when it would be fired and we use the equation such as , the product of the mass and velocity of an object i.e. known as momentum (p).

p = mv

Where p is the momentum of the rocket, m is the mass and v is the velocity of the rocket.

Since , here we can write Newtonian relations such as, Momentum is equivalence as a function of Force (F) and time (t) which is given as,

p = F t

So that from above two equation we can write as,

mv = Ft

t = mv/F

t = {(72000kg) ×(0.63m/s)}/35N

t = 1296 sec

Therefore, the rocket will be fired in 1296 seconds.

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As we carry out the experiment, the independent variable here is the he increase in temperature of the block of iron.

In many instances, it is very important for us to be able to understand the cause and effect relationship that is likely to exists between two variables. The only way that we could be able to in fact deduce the cause and effect relationship that does exist when we have two variables is by the use of an experiment.

Hence, when ever we are doing an experiment there must be an independent variable as well as well as a dependent variable. The variable that we are manipulating in the experiment is the independent variable. The dependent variable changes as we manipulate the independent variable.

As such, in the case of this experiment, the independent variable here is the increase in temperature of the block of iron.

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Answer :First part is what you learned so write what you learned then the other parts is The evidence that the universe is expanding comes with something called the red shift of light. Light travels to Earth from other galaxies. As the light from that galaxy gets closer to Earth, the distance between Earth and the galaxy increases, which causes the wavelength of that light to get longer.

Explanation:

The equation describes the force acting on a wire carrying current I and having length L in a magnetic field. Where is the angle formed by the wire and the magnetic field, and F=ILB sin x.

magnitude of the magnetic force experience

by a cable is 2.64 x 10 ^ -3 N

F = ILB sin x

 = 2 x .03 x 44 x 10^ -3 x sin 90 = 2.64 x 10 ^ -3 N

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The temperature change in the lead immediately   ∆T=1.56 K.

Temperature is a physical amount that expresses the hotness of a count number or radiation. There are 3 sorts of the temperature scale.

Temperature is a measure of the common kinetic power of the particles in an item. when the temperature will increase, the motion of the debris also increases. Temperature is measured with a thermometer or a calorimeter.

Temperature is a degree of the common kinetic strength of the particles of a substance. The higher the temperature of an item, the better its kinetic strength. Kinetic electricity is a form of electricity related to movement.

a.  ΔQ=mgh

ΔQ=0.5×9.80×20

ΔQ=98 J.

⇒∆U= ∆Q

⇒∆W=0

d. The temperature change is ∆T=1.56 K

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The x and y components of the velocity vector is 17.32 m/s and 10 m/s respectively.

The x-component of the ball's velocity is the velocity of the ball in the horizontal direction or x-axis.

The velocity of the ball in x-direction is calculated as follows;

Vx = V cosθ

where;

Vx = (20 m/s) x (cos 30)

Vx = 17.32 m/s

The velocity of the ball in y-direction is calculated as follows;

Vy = V sinθ

where;

Vy = 20 m/s x sin(30)

Vy = 10 m/s

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Resistance of snorkeler, R = 605 Ω.

Current, I = V/R 500/605  = 0.83 A

⇒ I = 0.83 A.

The flow of charge across the cell membrane creates an electric current. Cells control the flow of specific charged elements across membranes using proteins that reside on the cell surface and create openings for specific ions to pass through. These proteins are called ion channels.

For example, if there is a voltage difference between one arm and the other a current will flow through the body. The human body has a higher impedance to DC current than to its AC current. That is, a person can withstand the effects of an electric shock caused by a DC voltage more than he can by an AC voltage. It interferes with the normal functioning of the nervous and muscular systems, causing severe muscle contractions.

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The detail from the text best supports the answer to part A is Hamilton’s passionate drive pushed him into many confrontations, both physical and political as he sought a lasting legacy.

The part A identifies the central idea of the text which is Hamilton’s strong opinions and tendency to fight relentlessly for his beliefs contributed to the large impact he had as a Founding Father, but also made him several enemies.

Alexander Hamilton was a founding father of United States. He fought in the American Revolutionary War. He drafted the constitution. He was the founder of American financial system.

Therefore, the detail from the text best supports the answer to part A is Hamilton’s passionate drive pushed him into many confrontations, both physical and political as he sought a lasting legacy.

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When you place the ball in your palm (facing up or sideways) during a dribble it is called carrying.

Carrying occurs when the dribbling player continues to dribble after allowing the ball to come to rest in one or both hands and/or places their hand underneath the basketball. Carrying is a violation of the basketball rules.

There is  a type of carrying, known as palming which involves holding the ball in one hand in a grip without allowing it to fall naturally.

Dribbling in basketball is referred to as a repetitive action in which a player uses one hand to bounce the basketball continuously on the court.

There are types of dribbling in basketball which includes:

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Placing lights at either side of the mirror to directly brighten the complexion is the simplest way to help reduce shadows on the face. The temperature of this bulb should be comfortable as well (2,700 to 3,500 Kelvin).

Lighting in salons should be positioned to eliminate shadows. Placing lights at either side of the mirror to directly brighten the complexion is the simplest way to help reduce shadows on the face. The temperature of this bulb should be comfortable as well (2,700 to 3,500 Kelvin).

Compared to other spaces or buildings, a beauty salon has a lot more practical uses for lighting. It facilitates work, helps staff members see consumers clearly, and ensures that everything is carried out correctly.

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The category with the lowest joint relative frequency is Chocolate cupcakes with vanilla buttercream.

Relative frequency = Subgroup frequency / Total frequency

Some of the relative frequencies are given. From that we can find the remaining frequencies using basic addition and subtraction.

                                                 Vanilla     Chocolate      Total

Vanilla Buttercream                    0.15            0.06           0.21

Cream Cheese Icing                   0.19            0.14            0.33

Cookie Butter Buttercream        0.26           0.20           0.46

Total                                             0.60           0.40           1.00

Joint relative frequency = Joint frequency / Total frequency    

The joint relative frequency of

Therefore, the category with the lowest joint relative frequency is Chocolate cupcakes with vanilla buttercream.

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The speed of the bat swing decrease as the mass of the bat increases because mass is inversely proportional to velocity squared if the centripetal force is constant.

[tex]F_{c}[/tex] = m v² / r

[tex]F_{c}[/tex] = Centripetal force

m = Mass

v = Velocity

r = Radius

Rearranging for v,

v² = [tex]F_{c}[/tex] * r / m

Since [tex]F_{c}[/tex] and r is constant,

v² ∝ 1 / m

Since v² is inversely proportional to m and vice-versa, as the mass of the bat increases, speed of the bat swing decreases.

A centripetal force is responsible for making a body follow a curved path. The direction of centripetal force is perpendicular to the motion and towards the center of curvature.

Therefore, the speed of the bat swing decrease as the mass of the bat increases because mass is inversely proportional to velocity squared if the centripetal force is constant.

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Answer:

the ball being pulled toward the ground

Explanation:

Answer:

50 N

Explanation:

The change in momentum in this case can be calculated in this way

Impulse (Ns) = force (N) X time (s)

We have Impulse and time here:

10Ns= force X 0.2s

We rearrange the formula to get force

10 ÷ 0.2 = 50

Therefore average force is 50N

The acceleration of the cheetah is 4.07 m/s^2.

Acceleration is the rate of change of the velocity of an object with respect to time. The unit of acceleration is meter per seconds squared (m/s^2). The equation of acceleration is given below.

a = (v_f - v_i)/t

Where a = acceleration, v_f = final velocity, v_i = initial velocity and t = time.

Here, the final velocity = 26.5 m/s, initial velocity = 0 m/s (cheetah is at rest) and time = 6.5 s. The acceleration of the cheetah will be,

a = (26.5 - 0)/6.5

a = 4.07 m/s^2

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If an object is changing its direction or the speed of the object is changing then the object is said to be accelerating.

Acceleration is the rate at which speed and direction of velocity change over time. A point or object moving straight ahead is accelerated when it accelerates or decelerates. Even though the speed is constant, motion on a circle accelerates because the direction is constantly shifting.

An object is said to be accelerating if its velocity is changing, whether the change in velocity is constant or varies by a fixed amount.

Since acceleration is a vector quantity—which means it has both a magnitude and a direction—it follows that an object is said to be accelerating if its direction is changing.

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A prism is a translucent, triangular object composed of glass or plastic (or any transparent material). Refraction is a phenomenon that causes white light to curve when it passes through a prism. Light is bent when it travels from one medium (like air) to another medium through the process of refraction (like water or glass).

The refractive index of an optical medium is a dimensionless quantity that describes how efficiently the medium bends light. The amount of light that enters a substance is refracted or bent depends on the substance's refractive index.

Apparent depth is the distance between the real depth of an item and its image when it is submerged in a transparent medium, which is lowered by a factor equal to the relative index of refraction of the medium with regard to air.

apparent depth is equal to actual depth / refractive index.

d = (2/1.5) + (4/1.6) + (7/1.8)

 = 5.741 cm

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Explanation

The magnitude of the momentum of an object is given by:

where p is the momentum

m is the mass of the object

v is the mass of the object

so

Step 1

ind the momentum of aeach vehicle

a)

let

mass=1000 Kg

v=20 m/s

replace and calculate

b

let

mass=2000 Kg

v=5 m/s

replace and calculate

c

let

mass=1000 Kg

v=10 m/s

replace and calculate

d)let

mass=500 Kg

v=20 m/s

replace and calculate

e)xlet

mass=4000 Kg

v=5 m/s

replace and calculate

f)let

mass=500 Kg

v=10m/s

replace and calculate

Step 2

ow, raknk the automobiles based on the magnitude of the momentum( from the largest to smallest)

so

(automoblile 1 is the one on the left)

I hope this helps you

Dependence:

-Area

-Separation

-Medium

Independent from:

-Charge

-Electric potential

-Metal