09) Write the normal force acting on the skier if the friction is neglected. Skier mass=m gravity

Answer: direct linear

Explanation:

Answer:

velocity ,V=?,T=4hr,Distance ,144km,

V=distance divide by time

=144/4=36km/hr

Answer:

Explanation:

The spectrum of the planet clearly shows the presence of iron, hydrogen and sulfur.

The spectrum of the planet shows the presence of iron, hydrogen and sulfur.

A spectrum is a state that may fluctuate without gaps over a continuum and is not constrained to a particular set of values (plural: spectra or spectrums)[1]. After passing through a prism, visible light takes on a rainbow of colours, which is how the term was first used scientifically in optics. As knowledge of light increased on a scientific level, it started to encompass the entire electromagnetic spectrum. As a result, it evolved into a mapping of a variety of magnitudes (wavelengths) to a variety of attributes, including the perceived "colours of the rainbow" and other features that correspond to wavelengths outside of the visible light spectrum.

Today, analogies with spectrum are used to discuss subjects unrelated to optics.

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The conservation of momentum P states that the amount of momentum remains constant when there are not external forces.

We don't have external forces, so:

\(P_0 = P_1\\m_bv_{0b}+m_pv_{0p}=m_bv_{1b}+m_pv_{1p}\\\)

Where:

Solving for v0b:

\(v_{0b} =\dfrac{m_bv_{1b}+m_pv_{1p}- m_pv_{0p}}{m_{b}}\\\\v_{0b} =\dfrac{(7\;kg)(4\;m/s)+(2\;kg)(6\;m/s)- (2\;kg)(0 \;m/s)}{7\;kg}\\v_{0b}=\dfrac{40}{7}\;m/s\\\\\boxed{v_{0b}\approx5.71\;m/s}\)

The original velocity of the ball is 5.71 m/s.

The principle of conservation of momentum: In a closed system, The total momentum before collision is equal to total momentum after collision.

From the principle of conservation of momentum,

MU+mu = MV+mv.................... Equation 1

Where M = mass of the bowling ball, m = mass of the pin, U = initial velocity of the bowling ball, u = initial velocity of the pin, V = final velocity of the bowling ball, v = final velocity of the pin.

From the question,

Given: M = 7 kg, m = 2 kg, u = 0 m/s (at rest), v = 6.0 m/s, V = 4 m/s.

Substitute these values into equation 1 and solve for U

7(U)+2(0) = 7(4)+2(6)

7U = 28+12

7U = 40

U = 40/7

U = 5.71 m/s.

Hence, The original velocity of the ball is 5.71 m/s.

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Answer:

\(\huge\boxed{\sf PE = 1.6 \times 10^{-8} \ J}\)

Explanation:

Charge = Q = 8 × 10⁻¹⁰ C

Potential Difference = V = 40 V

Potential Energy = PE = ?

\(\displaystyle PE=\frac{1}{2} QV\)

Put the given data in the above formula for electrical potential energy.

\(\displaystyle PE = \frac{1}{2} (8 \times 10^{-10})(40)\\\\PE = (8 \times 10^{-10})(20)\\\\PE = 160 \times 10^{-10}\\\\PE = 1.6 \times 10^{-8} \ J \\\\\rule[225]{225}{2}\)

Electrical potential energy stored in the capacitor that has 8.0 x \(10^{-10}\) C of charge on each plate and a potential difference across the plates of 40.0 V will be 1.60×\(10^{-8}\) J.

As we know from the formula of potential energy,

Electrical Potential Energy(P.E.) = \(\frac{1}{2} Q V\)

where, Q= Charge on the plates (in Coulombs)

            V= Potential Difference between the charged plates( in Volts)

Substituting the values in the above formula,

P.E.=  \(\frac{1}{2} Q V\)

     = \(\frac{1}{2}(8.0 *10^{-10} )(40.0)\)

     = 1.60 x \(10^{-8}\) C/V or  1.60 x \(10^{-8}\) J

Capacitors are commonly used to store electrical energy and reuse it whenever needed. They store energy in the form of electrical potential energy. When capacitors are charged, an electrical potential difference builds up between the plates of the capacitors and subsequently electrical potential energy. This energy can be further used for various purposes.

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Answer:

1800J

Explanation:

E = ½mv²

E = ½(4)(30)²

E = 2 x 900

E = 1800J

Answer: a!! Bc 10x2=20!

Explanation:

Answer:

20N

Explanation:

F=m*a

F=10*2

F=20N

.....

Answer:

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\\)

From the question

mass = 36 g

volume = 6 cm³

We have

\(density = \frac{36}{6} = 6 \\ \)

We have the final answer as

Hope this helps you

Answer:

1700 kg

Explanation:

The mass of the ford mustang car be 1700 kg.

In physics, mass is a quantitative measurement of inertia, a basic characteristic of all matter. It essentially refers to a body of matter's resistance to changing its speed or location in response to the application of a force.

The change caused by an applied force is smaller the more mass a body has. The kilograms serves as the unit of mass in the International System of Units (SI).

Given parameters:

Force applied on the ford mustang car: F = 5100 N.

Acceleration of the ford mustang car: a = 3 m/s^2.

So, The mass of the ford mustang car be = force/acceleration

= 5100/3 kg.

= 1700 kg.

Hence, the mass of the ford mustang car be  1700 kg.

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Pressure vs. Depth Lab:

Pressure is defined as the force per unit area applied on an object. It is a scalar quantity, which means it only has magnitude and no specific direction.

It is often measured in units of Pascals (Pa), which is equivalent to one Newton of force per square meter of area. Pressure can be caused by the weight of an object, the force applied by a fluid, or the collision of particles with a surface.

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Answer:

Motion on an incline plane

Explanation:

A number of forces are acting on the box, including both gravity and friction, and you need to take both into account. There’s also the force exerted upon the box as you push it up the ramp.

The net change in the internal energy of the gas is 4300 Joules.

We know, from the first law of thermodynamics, the heat added to the system and the work done on the system is equal to the net change in internal energy of the system.

So, we can write,

ΔU = ΔQ + W

Where,

ΔU is the change in internal energy,

ΔQ is the total heat added to the system, the is given to be 2500 Joules and it has to be taken as positive because t is added to the system,

W is the work done, as the work done is against the gas, so, it has to be taken as positive,

we know,

W = F.S

Where,

F is the force applied,

S is the displacement,

So, putting values,

W = 1800 x 1

W = 1800 Joules.

So, the change in internal energy is,

ΔU = 2500+1800

ΔU = 4300 Joules.

The change in internal energy of the system is 4300 Joules.

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Answer:

\(4ms^{-2}\)

Explanation:

F = ma

Rearrange to get acceleration on its own:

a = \(\frac{F}{m}\)

Substitute 20 for F and 5 for m:

a = \(\frac{20}{5}\) = 4 meters/second/second

(a) The magnification is less than 1, the image is smaller than the object. Therefore, the image is real, inverted, and smaller than the object. (b)The  magnification is less than 1 in magnitude, the image is also smaller than the object. Therefore, the image is virtual, inverted, and smaller than the object.

In mirrors, magnification refers to the degree to which an object's size appears to be larger or smaller when reflected in a mirror. The magnification of a mirror is determined by its curvature and distance from the object being reflected.

We can use the mirror equation and magnification formula to solve the problem:

Mirror equation:

1/f = 1/do + 1/di

Magnification formula:

m = -di/do

where

f = focal length of the mirror

do = object distance from the mirror

di = image distance from the mirror

m = magnification

Given:

Radius of curvature, R = 25.0 cm (since the mirror is concave, R is negative)

focal length, f = R/2 = -12.5 cm

(a) For an upright pencil placed 46.0 cm from the mirror:

do = 46.0 cm

Using the mirror equation, we can solve for di:

1/f = 1/do + 1/di

1/-12.5 = 1/46.0 + 1/di

di = -17.2 cm

Since di is negative, the image is formed behind the mirror, which means it is real. Also, the magnification is:

m = -di/do = -(-17.2 cm)/46.0 cm = 0.374

Since the magnification is less than 1, the image is smaller than the object. Therefore, the image is real, inverted, and smaller than the object.

(b) For an upright pencil placed 5.0 cm from the mirror:

do = 5.0 cm

Using the mirror equation, we can solve for di:

1/f = 1/do + 1/di

1/-12.5 = 1/5.0 + 1/di

di = 3.33 cm

Since di is positive, the image is formed in front of the mirror, which means it is virtual. Also, the magnification is:

m = -di/do = -3.33 cm/5.0 cm = -0.666

Since the magnification is negative, the image is inverted. Since the magnification is less than 1 in magnitude, the image is also smaller than the object. Therefore, the image is virtual, inverted, and smaller than the object.

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A Shepherd satellite is a natural moon that orbits near the edge of a planetary ring to stabilize the ring's particles through its pull. Its name is given Shepherd, as they restrict hub particles as a shepherd.

They pick up particles through their gravitational pull and, using orbital resonance, deflect them from their original orbits. Examples are the moons of Uranus, known as Cordelia and Ophelia.

The rings of Uranus show are very thin and well-defined, with sharp gaps between them. This was explained by Goldreich and Tremaine. They suggested that two small satellites might be confining each ring. The first images of shepherd satellites were taken by Voyager.

The complex ring system of Saturn has many such satellites. A few are Prometheus, Daphnis, Pan, Janus, and Epimetheus.

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It will takes approximately 0.165 seconds for the ball to reach the floor after it has been gently pushed off the table top from a height of 1.3 m above the floor.

When an object is dropped from a height, it falls to the ground due to the force of gravity.

When an object is released from a height of 1.3 m above the ground, the time it takes to reach the ground is calculated using the formula:

h = 0.5gt²  where h is the height of the object, g is the acceleration due to gravity and t is the time taken for the object to reach the ground.

Rearranging this formula to solve for t, we have: \(t = \sqrt{(2h/g)}\)

Substituting the values we have: \(h = 1.3 mg = 9.81 m/s^{2} t = \sqrt{(2 \times 1.3 / 9.81)t} = \sqrt{(0.265 / 9.81)t} = \sqrt{0.027t } = 0.165 seconds\)

Therefore, it takes approximately 0.165 seconds for the ball to reach the floor after it has been gently pushed off the table top from a height of 1.3 m above the floor.

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The temperature which is lowest among these given values will be 270K, which means option B is the right answer.

Temperature is defined as the degree of hotness or coldness of an object. It means that the amount of energy which is stored in it to increase its degree of hotness.

In the given problem, the values are given in different systems. So to determine that which one is smaller, first we convert them into Celsius, so that all the units are same.

The relation between Fahrenheit and celcius is given as follows:

Temperature in celsius = 5/9(temperature in Fahrenheit - 32)

∴ Temperature in celsius = 5/9(32 - 32) = 0 Celsius

The relation between Kelvin and Celsius is given as :

Temperature in Celsius = Temperature in Kelvin - 273.15

∴ Temperature in Celsius = 270 - 273.15 = -3.15 Celsius

273 K will be equal to 0 Celsius using above relation.

Hence all the values are equal to zero except 270 K which is negative, hence coldest.

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The moment of inertia of a bicycle wheel of 65cm diameter and mass 1.1 kg is 0.116 Kg m^2.

What is moment of inertia?

Moment of inertia can be defined as the tendency of any object to remain in the state of rest or a constant rotational velocity which can be calculated by I = mr^2, where I is moment of inertia, m is mass and r is radius.

The moment of inertia of the bicycle wheel can be calculated as,

diameter of the bicycle wheel = 65 cm = 0.65 m

radius = d/2 = 0.65 m / 2 = 0.325 m

I = mr^2 = 1.1 Kg x (0.325m)^2 = 0.116 Kg m^2

Therefore the moment of inertia of the bicycle wheel is 0.116 Kg m^2.

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The force needed to accelerate the trick rider and the pink flaming motorcycle is 1500 N.

Force is the product of mass and acceleration.

To calculate the force needed to accelerate the trick rider and the pink flaming motorcycle, we use the formula below

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

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Answer:

The new pressure will be 12 atm

the horizontal component of the golf ball's initial velocity is 47.92 m/s.

The given parameters;

initial velocity of the golf, v = 60 m/s

angle of projection of the golf, Ф = 37°

The horizontal component of the golf ball's initial velocity is calculated as follows;

\(v_0_x = v\times cos(\theta)\\\\\)

\(v_0_x\) = 60 m/s  x cos (37)

\(v_0_x\) = 60 m/s x 0.7986

\(v_0_x\) = 47.92 m/s

Thus, the horizontal component of the golf ball's initial velocity is 47.92 m/s.

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Answer:

when the player’s foot is in contact with the ball

Explanation:

Answer:

1 and 2>3 and 4=4 and 5 that is the answer

The initial velocity of the 2.0-kg cart was 0.55 m/s to the right, using the conservation of momentum principle.

To find the initial velocity of the 2.0-kg cart, we apply the principle of conservation of momentum.

The total momentum before the collision equals the total momentum after the collision.

Before the collision, only the 2.0-kg cart has momentum (mass x initial velocity), and after the collision, both carts have momentum (mass x final velocity).

By setting the initial momentum equal to the total final momentum, we can solve for the initial velocity of the 2.0-kg cart: (2.0 kg)(v) = (1.0 kg)(0.35 m/s) + (2.0 kg)(0.20 m/s), resulting in an initial velocity of 0.55 m/s to the right.

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Answer:

a body continues its state of rest or uniform motion in a straight line provided no net force acts on it.

it says that if no net force acts on a body the body will continue its initial state

for example  a chair lying in a room will remain stationary as long as no net force acts on it this is the first part .In second part it says that a body will continue its motion as long as no net force acts on it however this cannot be assumed on earth because if a body starts moving it will come to rest after sometime because of friction and air resistance. T his is only possible in space where there are no resistive forces that can stop the body.

i hope this will be helpful for you.

Answer:

5

Explanation:

Take 10g divided by 2 ml

The difference in the emission of interstellar hydrogen atoms between radio waves at a wavelength of 21cm and visible light is due to the physical conditions of the hydrogen clouds.

Hydrogen atoms emit radio waves at a wavelength of 21cm when their electrons change their spin state from parallel to anti-parallel. This transition corresponds to a change in energy that is characteristic of hydrogen atoms in interstellar space, where the density of particles is low and the temperature is cold.

However, some hydrogen clouds can emit visible light when the conditions are right for the excitation of the hydrogen atoms. This can happen, for example, when the density of particles is high enough for collisions to excite the electrons of the hydrogen atoms to higher energy levels, and then they release that energy as visible light when they return to their ground state.

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Answer:

Explanation:

I hope it helps ❤❤