A hockey puck with a mass of 0.16 kg is slapped so that its velocity is 50 m/sec. It slides 40 meters across the ice before coming to rest. How much work is done by friction on the puck?

Answer:

See below ~

Explanation:

The fact that water is attracted to itself, a property called cohesion, leads to another important property, the liquid form of water is more dense than the solid form. As water solidifies into ice, the molecules must move apart in order to fit in to a crystal lattice structure, causing water to expand as it freezes. Because of this, ice floats and water sinks, which keeps the oceans liquid and prevents them from freezing solid from the bottom up.

Suppose i have a piece of material that looks yellow under white sunlight due to selective reflection. when it is illuminated by a lamp emitting cyan light, he color will appear is yellow or green under white sunlight

Selective reflection occurs when only certain colors of light are reflected by a surface, while others are absorbed. In this case, the material appears yellow under white sunlight because it reflects yellow light while absorbing other colors.

When illuminated by a cyan lamp, the material will appear green, this is because cyan light is a mixture of blue and green light, and the material will selectively reflect the green light while absorbing the blue light. The result is a perceived color that is a mixture of the colors that are reflected. In this case, the material appears green because it is reflecting the green light from the cyan lamp while still reflecting some yellow light due to its selective reflection properties. Overall, the material's perceived color will depend on the properties of the illuminating light and the selective reflection properties of the material.

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When rock on Earth's surface is broken into smaller pieces, forming loose material  is called Weathering.

Physical weathering and chemical weathering are the two basic types of weathering. On this page, we discuss mechanical weathering (and more).

Rocks naturally fracture at a number of different levels. The borders between mineral grains can be a source of weakness in the rock. Sedimentary rocks are frequently stratified, and the layers are occasionally not tightly bonded together. As larger, more massive rocks are exposed by erosion, joints (cracks with no relative motion across them, merely spreading) may form in the rocks. These rock fissures become wider due to physical deterioration. Of course, biological weathering refers to weathering caused by living creatures.

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Answer:

2.45 x 10^-2

Explanation:

All numbers in scientific notation or standard form are written in the form

m × 10n, where m is a number between 1 and 10 ( 1 ≤ |m| < 10 ) and the exponent n is a positive or negative integer.

To convert 0.0245 into scientific notation, follow these steps:

Step 1) Move the decimal 2 times to right in the number so that the resulting number, m = 2.45, is greater than or equal to 1 but less than 10

Step 2) Since we moved the decimal to the right the exponent n is negative

n = -2

Step 3) Write in the scientific notation form m × 10n

= 2.45 × 10-2

Therefore,

2.45 × 10-2 is the scientific notation form of 0.0245 number and 2.45e-2 is the scientific e-notation form for 0.0245

Here are some examples of decimal to scientific notation calculator

The Resolution is 16 nm. The resolution is inversely proportional to the light wavelength.

(a) The resolution that can be reproduced with an extreme ultraviolet (EUV) lithography source that uses a 13-nm exposure wavelength is 13/(2 × 0.65 × 0.6) nm.

The formula for resolution is given by;Resolution = Wavelength/(2 × NA × k)Substituting the given values, we have;Resolution = 13/(2 × 0.65 × 0.6)Resolution ≈ 16 nm

(b) When the light wavelength increases, the resolution decreases. This is because a decrease in light wavelength leads to an increase in resolution.

Therefore, the resolution is inversely proportional to the light wavelength. For instance, when the light wavelength is 7 nm, the resolution will be better compared to a wavelength of 13 nm.

(c) The numerical aperture (NA) to get the smallest feature size of 5 nm is given by;NA = Wavelength/(2 × Resolution)Substituting the given values, we have;NA = 13/(2 × 5)NA = 1.3

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The speed of the elevator, given that it travels a distance of 210 m in 35 s is 6 m/s

The formula for calculating the speed of an object is given as follow:

Speed = distance / time

Considering the question given above, we can obtain the speed of the elevator as follow:

Speed = distance / time

Speed = 210 / 35

Speed = 6 m/s

From the calculation made above, we can see that the speed of the elevator is 6 m/s

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Answer:

What is your name?

Explanation:

no bro I don't know I am New of this app so I don't know

The distinctive feature of the rotation of Venus about its axis is that it rotates in the opposite (retrograde) direction compared to most planets, including Earth.

Option (a) is the correct choice. Venus rotates on its axis in the opposite direction (retrograde) compared to the majority of planets in our solar system, including Earth. While most planets, including Earth, rotate in a prograde direction (counter-clockwise when viewed from above the solar system's north pole), Venus rotates in the opposite direction (clockwise when viewed from above the north pole). However, Venus and Earth both take approximately 24 hours to complete one rotation, so their rotation periods are similar in length.

Option (b) is incorrect because Venus does not rotate much more rapidly than Earth or Mars. Option (c) is also incorrect as the spin axis of Venus is not almost parallel to the ecliptic plane. Option (d) is incorrect because Venus does not rotate in an inverse direction to the orbital revolution direction of the planets. Venus's retrograde rotation is its most notable characteristic when it comes to its rotation.

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Answer: because there is no displacement or movement in the watchman's work. According to science when displacement or movement take place it is said to be work. Jul 9, 2020

Hope it helps!

Answer:

20kph

Explanation:

Since she travels 100kpm in 5 hours and 100 divided by 5 is 20 she would travel 20km in one hour

Answer:

goals

Explanation:

it tracks ur time from one place to another

Answer: A.

current (thumb) to magnetic field (fingers)

Answer:

A. current (thumb) to magnetic field (fingers)

Explanation:

According to the Right-Hand Thumb rule, if we are holding a current- carrying straight conductor in our right hand such that the thumb points toward the direction of current, then the fingers will wrap around the conductor in the direction of the field lines of the magnetic field.

Hope it helps.

If you have any query, feel free to ask.

36.9

explanation

We want to find

sin^{-1}(0.61)sin

−1

(0.61)

We can use at least a scientific calculator to find the value of the given expression.

The sine inverse function is a secondary function.

So you press SHIFT then press Sin

to access the sine inverse function and then type 0.61 in it.

Close the parenthesis and press "="

This will give you the value.

sin^{-1}(0.61)=37.5895sin

−1

(0.61)=37.5895

We round to the nearest tenth to get,

sin^{-1}(0.61)=37.6\degreesin

−1

(0.61)=37.6°

The average velocity of the object in the first 5 seconds is 4 m/s.

The average velocity of an object can e defined as the average of the velocities of the object throughout its motion.

Average velocity can also be defined as the ratio of the total displacement of the object and the total time taken.

Considering the given object:

total displacement in the first 5 seconds = 40 m

time taken = 5 seconds

Average velocity = 40 m / 5 seconds

Average velocity = 4 m/s

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Answer:

  an object sliding down hill

Explanation:

On a slope, the force applied is due to gravity. Its direction is straight down. If the object is sliding down the hill, its displacement is at an angle to the applied force. The angle of displacement will depend on the steepness of the hill.

Static equilibrium means that all forces are equal, so to make this easiest you want to break F1 into it's horizontal and vertical components. As there are no other forces acting in the horizontal, we know the horizontal component of F1 is 40N.

Dynamic equilibrium is a state in which bodies are moving at a constant speed as opposed to static equilibrium, which is a state in which bodies are at rest (rectilinear motion). The total amount of forces exerted on them in both situations is zero.

When two forces are acting on an object that is in static equilibrium, it indicates that their sum is zero, which makes static equilibrium a useful analytical tool. You may create an equation to figure out the direction and strength of the unknown force if you know the direction and strength of one of the forces.

Thus, Static equilibrium means that all forces are equal, so to make this easiest you want to break F1 into it's horizontal and vertical components.

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The distance below the surface of the rim of the cylinder will be approximately 30 cm, to two decimal places.

The volume of the aluminum cylinder = 2 L

Let the volume of turpentine = V1 at 10°C

Let the new volume of turpentine = V2 at 80°C

Coefficient of volume expansion of turpentine = β = 9.0 × 10⁻⁴/°C.

Volume expansion of turpentine from 10°C to 80°C = ΔV = V2 - V1 = V1βΔT

Let the distance below the surface of the rim of the cylinder be 'h'.

Therefore, the volume of the turpentine at 80°C is given by; V2 = V1 + ΔV + πr²h...(1)

From the problem, we have the Diameter of the cylinder = 2r = 4 cm.

So, radius, r = 2 cm. Depth, d = 30 cm

So, the height of the turpentine in the cylinder = 30 - h cm

At 10°C, V1 = 2L

From the above formulas, we have: V2 = 2 + (2 × 9.0 × 10⁻⁴ × 70 × 2) = 2.126 L

Now, substituting this value of V2 in Eq. (1) above, we have;2.126 = 2 + π × 2² × h + 2 × 9.0 × 10⁻⁴ × 70 × 2π × 2² × h = 0.126 / (4 × 3.14) - 2 × 9.0 × 10⁻⁴ × 70 h

Therefore, h = 29.98 cm

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The force acting on a moving charge is known as the magnetic force. The force acting on the charge will be 3.75 N.

Magnetic fields only exert a force on a moving electric charge. A moving charge generates a magnetic field. With an increase in charge and magnetic field strength, this force rises.

when charges have higher velocities, the force is stronger. However, the magnetic force is always perpendicular to the velocity.

Mathematically the force exerted on the charge will be

F=qvBsinα

F= force acting on the charge= 7.5 ×10⁻²

v = velocity of charge=2.5 ×10⁴

q = charge=?

B= 8.1 ×10⁻²

F=qvBsinα

\(\rm{q= \frac{F}{vBsina}}\)

\(\rm{q= \frac{7.5\times 10^-2}{2.4\times 10^-2 \times 8.1\times 10^-2 sin25^0}}\)

q = \(8.8 \times 10^ {-5}\rm C\)

Hence the value of the charge will be \(8.8 \times 10^ {-5}\rm C\).

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Answer:

the answer is c. hope this help you out

Answer:

Explanation:

This is a product of a mass and velocity of a moving or a rest body.

it is expressed as P(momentum)=M(mass) × V(velocity)

Its SI unit is kgm/s

From our question.

Given

Momentum=3600kgm/s

Velocity=6m/s

RTF=Mass

Solution

P=M×V

M=P/V

= 3600kgm/s

6m/s

Contact injury happens when a person is holding an object that is directly hit or splashed by lightning.

To find answer, we need to know more about the lightning and injuries.

Thus, we can conclude that, contact injury occurs when a person is holding an object that is directly hit or splashed by lightning.

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When someone is holding something that has been struck or splashed by lightning, contact damage occurs.

We need additional information concerning lightning and injuries in order to identify the solution.

In light of this, we can say that contact injuries happen when a person is holding an object that has been struck by lightning or splashed by it.

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Answer:

Explanation:

(I) Electrical energy into sound energy. (ii) Heat energy into kinetic energy (or mechanical energy). (iii) Chemical energy into kinetic energy (or mechanical energy). (iv) Chemical energy into heat energy

Answer:

astronomical units hope this helps

(a) The elastic potential energy of the block-spring system is 1.536 J. (b) After leaving the spring, the block's speed is approximately 1.09 m/s.

(a) The elastic potential energy of the block-spring system can be calculated using the formula:

Elastic potential energy = 0.5 * k * x^2

where k is the spring constant and x is the displacement of the spring from its equilibrium position. In this case, k = 725 N/m and x = 0.0650 m. Plugging in these values, we can calculate the elastic potential energy:

Elastic potential energy = 0.5 * 725 N/m * (0.0650 m)^2

Elastic potential energy = 1.536 J

(b) When the block is released and the surface is frictionless, the total mechanical energy of the system is conserved.

Elastic potential energy = 0.5 * m * v^2

where m is the mass of the block and v is its speed. Rearranging the equation, we can solve for v:

v = sqrt((2 * Elastic potential energy) / m)

 = sqrt((2 * 1.536 J) / 2.60 kg)

 = sqrt(1.181) m/s

 ≈ 1.09 m/s

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All of the above.

For example:

A glass plate is a solid. Particles vibrate in a solid and are closely packed. together.

It doesn’t change shape if you touch it.

It doesn’t change volume like it’s water.

Answer:

D: all of the above

Explanation:

particles in a solid do vibrate but they're tightly packed and move around fixed location

The spring constant of the ideal massless spring is approximately option c- 24.1 N/m.

The spring constant, denoted by "k," is a measure of the stiffness or rigidity of a spring. It defines the relationship between the force applied to a spring and the resulting displacement or deformation of the spring from its equilibrium position.

The period (T) of a simple harmonic oscillator is related to the spring constant (k) and the mass (m) of the object attached to the spring by the equation:

T = 2π√(m/k)

Weight of the object (W) = 2.450 N

Period (T) = 0.903 s

Acceleration due to gravity (g) ≈ 9.8 m/s²

Calculating the mass (m):

m = W/g = 2.450 N / 9.8 m/s² ≈ 0.25 kg

Calculating the spring constant (k):

k = (4π² * 0.25 kg) / (0.903 s)² ≈ 24.1 N/m

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The speed of the puck after the force is applied for 0.050 s is approximately 0.75 m/s to the left. Note that the negative sign indicates the direction

To find the speed of the hockey puck after the applied force, we can use Newton's second law of motion, which states that the net force acting on an object is equal to the mass of the object multiplied by its acceleration:

F_net = m * a

In this case, the net force acting on the puck is the applied force of 12.0 N directed to the left. The mass of the puck is 0.160 kg. We need to calculate the acceleration of the puck.

The acceleration can be calculated using the equation:

a = F_net / m

a = 12.0 N / 0.160 kg

a = 75 m/s²

Since the initial speed of the puck is to the right, and the force applied is to the left, the net force acts to oppose the motion. Therefore, the acceleration is negative (-75 m/s²).

To find the final speed of the puck, we can use the equation:

v_final = v_initial + a * t

where:

v_final is the final speed,

v_initial is the initial speed,

a is the acceleration,

t is the time.

Plugging in the given values:

v_final = 3.00 m/s + (-75 m/s²) * 0.050 s

v_final = 3.00 m/s - 3.75 m/s

v_final ≈ -0.75 m/s

The speed of the puck after the force is applied for 0.050 s is approximately 0.75 m/s to the left. Note that the negative sign indicates the direction, which in this case is opposite to the initial motion of the puck.

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Answer:

I think it would be the second answer...

Explanation:

Hope this helps!

Lucas do a work of 0 joule. Hence, option (B) is correct.

The notion of work in science is significantly different from what it is understood to entail in ordinary life. Every time work is performed, energy is transmitted, as shown by the definition of work in physics.

A force must be applied and there must be movement in the force's direction for a work to be completed scientifically. Having said that, we may state that The product of the component of the force acting in the displacement's direction and its magnitude is work.

Mathematically work done can be expressed as:

work done = force × displacement × cosθ

Where θ is the angle between the force and the displacement .

Here, the  car remains stuck, that means, no displacement happens. So. Lucas do a work of 0 joule.

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Answer:

1.95 * 10^8 ms-1

Explanation:

Let us recall that;

Refractive index (n) = Frequency of light in air/Frequency of light in another medium

If Frequency of light in air = 5.09 x 10^14 Hz

Refractive index of sodium chloride = 1.54

Then;

Frequency of light in sodium chloride =  Frequency of light in air/Refractive index of sodium chloride

Therefore;

Frequency of light in sodium chloride =  5.09 x 10^14 Hz/1.54

Frequency of light in sodium chloride =  3.31 x 10^14 Hz

So;

n= Frequency of light in air/Frequency of light in sodium chloride = Speed of light in air/speed of light in sodium chloride

speed of light in sodium chloride = Frequency of light in sodium chloride * Speed of light in air/Frequency of light in air

speed of light in sodium chloride = 3.31 x 10^14 Hz * 3 * 10^8 ms-1/5.09 x 10^14 Hz

speed of light in sodium chloride = 1.95 * 10^8 ms-1