3. There is a thin layer of water between the blade and the ice. Suggest how this affects friction and helps the skater? . ​

Answers

Answer 1

Explanation:

Underneath the blade of skates, there is a thin layer of water from the melted ice. ... This water then acts as a lubricant (something whose purpose is decreasing friction), resulting in a smooth motion of the skates over the ice.


Related Questions

1. a conductor carries a current that is decreasing exponentially with time. the current is modeled as where is the current at time and is the time constant. how much charge flows through the conductor between and ?

Answers

Explanation:

what is the colour of our blood

Answer:

Q = Q0exp -t/RC

Explanation:

Q0 initial chage

RC time constant

t time

A car was going at 20m/s along a straight highway. The driver slams on the break to avoid hitting a deer. The car had a negative acceleration of -2m/s^2 How much time did it take the car to stop

Answers

I’m not to sure but I think the answer is -0.10

Which statement is a description of Charles’s law?

The temperature and volume of a gas are directly proportional when pressure is constant.
The temperature and volume of a gas are inversely proportional when pressure is constant.
The volume and pressure of a gas are directly proportional when temperature is constant.
The volume and pressure of a gas are inversely proportional when temperature is constant.

Answers

Answer:

The temperature and volume of a gas are directly proportional when pressure is constant

5) Match the following.

Answers

Answer:

hope helpful

Explanation:

mark me as brainliest pls

A 50 N force is acting on a soccer ball that is 5 kg, what's the acceleration of the soccer ball?

Answers

Answer:

Explanation:

HCE 20 ADIASM EPEGURNTE   MSIMOLO

What is the total distance travelled? What is the displacement of the object?

Answers

1/2 x b x h if the question is askinf u to make a shape and it comes out a triangle
if not triangle then 1/2 x (x x b) x h
if none of these questions are there then multiply time by position
hope this helped

What new characteristic did John Dalton add to the model of the atom?

An atom is a round, solid mass.
An atom has a massive, positive center.
An atom is made up of smaller particles.
An atom can join with other kinds of atoms.

Answers

Answer: It is matter

Explanation:

Answer:

D

Explanation:

Trust me, I just did the test. :) :) :)

The amount of work (W) done on an object is equal to the force (F) needed to lift
the object (the object’s weight) multiplied by the distance (d) the object is lifted: W = F ✕ d.
Use the weight of the ball that you calculated in activity B to determine how much work
would be required to lift the ball 2 meters above the zero position:

Answers

Answer:

Weight x Distance is usually shown in graph form just multiply these to find the Force. W x D = F

Other formula's.

Finding Kinetic energy with given weight 10kg

In classical mechanics, kinetic energy (KE) is equal to half of an object's mass (1/2*m) multiplied by the velocity squared. For example, if a an object with a mass of 10 kg (m = 10 kg) is moving at a velocity of 5 meters per second (v = 5 m/s), the kinetic energy is equal to 125 Joules, or (1/2 * 10 kg) * 5 m/s 2.

If a male runner in the fourth starting position ran the 400 m race in 44.40 s, how would you
calculate his average speed?

Answers

V=d/t=>v=400m/44.40s=>v=9m/s

If a male runner in the fourth starting position ran the 400 m race in 44.40 s, then for calculating his average speed we have to divide the total distance covered by the time taken by him to cover the distance.

His average speed would be 9.0 meters/second.

What is speed?

The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object. The unit of speed is a meter/second. The generally considered unit for speed is a meter per second.

The mathematical expression for speed is given by

speed = total distance /Total time

If a male runner in the fourth starting position completed the 400 m race in 44.40 s, we must divide the total distance traveled by the amount of time it took him to complete the course to get his average pace.

the average speed of the runner = 400 meters/44.40 seconds

                                                       = 9.0 meters/second

Thus, his average speed.be his average speed would be 9.0 meters per second

Learn more about speed from here,

brainly.com/question/7359669

#SPJ2

A 700 g block is released from rest at height h0 above a vertical spring with spring constant k ! 400 N/m and negligible mass. The block sticks to the spring and momentarily stops after compressing the spring 19.0 cm. How much work is done (a) by the block on the spring and (b) by the spring on the block

Answers

The work done by the block on the spring and by the spring on the block is 7.22 J.

The given parameters;

mass of the block, m = 0.7 kgspring constant, k = 400 N/mextension of the spring, x = 19 cm = 0.19 m

Based on law of conservation of energy, the potential energy of the block will be converted to elastic energy of the spring, producing the given extension.

The work done by the block on the spring will be equal to work done on the block by the spring.

[tex]W = \frac{1}{2} kx^2\\\\W = \frac{1}{2} \times 400 \times 0.19^2\\\\ W = 7.22 \ J[/tex]

Thus, the work done by the block on the spring and by the spring on the block is 7.22 J.

Learn more here:https://brainly.com/question/14509934

018 10.0 points
Salmon often jump waterfalls to reach their
breeding grounds.
Starting downstream, 1.83 m away from a
waterfall 0.332 m in height, at what minimum
speed must a salmon jumping at an angle of
43.7° leave the water to continue upstream?
The acceleration due to gravity is 9.81 m/s?.
Answer in units of m/s.
r in units of
10
100

Answers

Answer:

jfjcgufnfhfufm TV fifnricnrhkddufnfif km fgkfkvntfmrugrhfifnh r

Temperature at which change of state occurs is... (science))

Answers

Answer: melting

Explanation: Becuse that is the science

please answer the question ​

Answers

Answer:

A safest device

Explanation:

it's meant to operate safe and provide over current protection of an electrical circuit

NEED THIS ASAP

Does increasing mass also increase the energy transferred to another object? What is your evidence to support this claim?
Increasing mass (will / will not) increase the energy put into another object.

Answers

Answer:

Energy is essentially work done by an object or on object.

From,

W = Fd

It's directly proportional to mass.

from,

K. E = 1/2mv²

Energy is directly proportional to mass.

P. E = mgh

Energy is directly proportional to mass.

H = mc∆T

Energy is directly proportional to mass.

Thus increasing mass will increase the energy also imparted on another object since all the above eqns show that relationship.

And for 2 moving bodies

K.Ei = K.Ef(energy conservation)

m1u²1 + m2u²2 = m1v²1 + m2v²2

The relationship is the same that the greater mass the greater the impact.

When the toaster is switched on the current is 4.0 A

The resistance of the toaster is 60 Ω

Calculate the power of the toaster.

Use the equation:

power = (current)^2 × resistance

Answers

Answer:

by using the formula it would be (4)^2 x 60 which gives 960 watt

What is the Coriolis Effect?

Question 5 options:

the circulation route of trade winds moving from east to west


the way that tropical winds circulate to form hurricanes and large storms


the rapid movement of winds found in the upper atmosphere


the curved path of global winds due to the rotation of Earth on its axis

Answers

Answer:

An effect whereby a mass moving in a rotating system experienced a force acting perpendicular to the direction of motion and to the axis of rotation.

If the mass were to increase 12 times, what would happen to the kinetic energy?

Answers

Answer:

Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. The same amount of work is done by the body when decelerating from its current speed to a state of rest. Tell me if u need any more help, have a goooood dayyyyy and pls mark brainly

Explanation:

138.42 g of salt water has a volume of 117.0 mL. Determine its density.

Answers

I believe it’s hebun 3. 0.446 g of hydrogen.

Khi tia tới hợp với pháp tuyến tại điểm một góc i = 30 độ thì tia phản xạ hợp với pháp tuyến tại điểm tới một góc
A. i' = 90 độ B. i' = 45 độ
C. i' = 30 độ D. i' = 60 độ

Answers

Answer:

h jo

yhufjffj

m

m

m

m

m

n

m

j.j

j

njbgjbhggh

kjbn

the circuit contains a filament bulb, connected with ........ to a ........

fill in the blanks.​

Answers

Answer:

The circuit contains a filament bulb, connected with terminal to a terminal.

Explanation:

The base of the electric bulb and the metal tip of the base are the two terminals of the bulb. One is called a positive terminal while the other is called a negative terminal. The filament of the electric bulb is connected to its terminals.

What force causes you to move upward when you jump into the air?
a. You push down on Earth with a force greater than your weight, so Earth pushes back on you with a force that is equal in magnitude but opposite in direction

b. You push down on Earth, and because Earth is so large, it pushes back on you with a force that is greater than the downward force you exerted on it

c.You push down on Earth, but because Earth is stationary, Earth cannot exert an upward force on you so internal forces from your muscles act on your body itself.

d.You push down on Earth, which causes it to move slightly down under your feet and give you the sensation that you have risen.​

Answers

A, because of the rule of action-reaction pairs

Срочно нужно решение задания 5, пожалуйста!!!!!

Answers

I don’t understand this let me try I will try my best

what is uniform velocity

Answers

Answer:

this is the velocity

Explanation:

Uniform Velocity-A body is said to have uniform velocity if it covers equal distance in equal intervals of time in a particular direction, however, the time intervals may be small.

suppose that we attach velcro® to the non-magnetic ends of the two carts in the video and remove the mass bars, so that both carts have the same mass. we repeat the experiment shown in the video, and the carts stick together after they collide. if the launch cart travels at a speed v0, then how fast will the combined two-cart system travel after the collision?

Answers

The momentum conservation allows to find the final speed of the cars together are:

If the second car is stopped, the final speed is:     v = vo / 2 If the second car moves towards the first, the final speed is:   v = 0

The momentum is defined by the product of the mass and the speed of the body.

        p = m v

Where the bold letters indicate vector, p is the moment, m is the mass and v the velocity.

If we define the system as formed by the two bodies, the forces during the collision are internal and the momentum is preserved, let's find the moment in two instants.

Initial instant. Before crash.

       p₀ = m v₀₀₀+ m v₀₂

Final moment. After the crash.

      [tex]p_f = 2m \ v[/tex]

The moment is preserved.

      [tex]p_o =p_f \\m v_o + m v_o_2 = 2m \ v[/tex]  

     [tex]v = \frac{m v_o + v_o_2}{2m}\\ v = \frac{1}{2} \ ( v_o + v_o_2)[/tex]

We have two cases:

That the second car is initially stopped, therefore the speed is zero

       v = v₀ / 2

That the second car move towards the first with velocity v₀₂ = - vo

       v = 0

In conclusion using the momentum conservation we can find the final velocity of the cars together are:

If the second car is stopped, The final speed is:   v = vo / 2 If the second car moves towards the first, the final speed is:  v = 0

Learn more here: brainly.com/question/3920210

A car accelerates from 0 to 30 m/s in 8 seconds. What is its acceleration?

Answers

Answer:

3.75m/s²

Explanation:

a=v-u. then you substitute the values

t

A woman in a sprint race accelerates from rest to 8.7 m/s in 2.7 s. What is her displacement?​

Answers

Answer:

23.49m

Explanation:

Distance =  velocity x time

8.7 x 2.7 = 23.49m

Three astronauts guide a 100 kg asteroid safely away from their space capsule. The first astronaut pushes with a 35 N force directed 45 degrees below the x-axis. The second astronaut pushes with a 35 N force directed 45 degrees above the -axis. The third astronaut pushes with a 35 N force along the x-axis. Calculate the magnitude of the net force exerted by the three astronauts. Calculate the rate (magnitude only) at which the asteroid's velocity changes.

Answers

The magnitude of the net force exerted by the three astronauts is 84.5 N and the rate at which the asteroid's velocity changes is 0.845 m/s².

The given parameters;

mass of the asteroid = 100 kgforce by first astronaut = 35 N, at 45 degrees below x -axisforce by second astronaut = 35 N, at 45 degrees above x-axisforce by third  astronaut = 35 N, at 0 degrees on x-axis

The resultant horizontal force applied by the three astronauts on the asteroid is calculated as;

Fₓ = 35cos(45) + 35cos(45) + 35cos(0)

Fₓ = 84.5 N

The rate at which the asteroid's velocity changes is calculated as;

[tex]F = ma = m\frac{\Delta v}{\Delta t} \\\\\frac{\Delta v}{\Delta t} = \frac{F}{m} \\\\\frac{\Delta v}{\Delta t} = \frac{84.5}{100} \\\\\frac{\Delta v}{\Delta t} = 0.845 \ m/s^2[/tex]

Thus, the magnitude of the net force exerted by the three astronauts is 84.5 N and the rate at which the asteroid's velocity changes is 0.845 m/s².

Learn more here: https://brainly.com/question/20407089

Jason throws a ball horizontally off a 300 meter cliff at 15.0 m/s. How far will it travel before it hits the
ground? Use significant figures, and estimate g to be equal to 9.81 m/s2. Round the answer to the nearest
hundredth.
117.30 m
B
130.80 m
с
51.80 m
D
101.70 m

Answers

Answer:

117,30m

Explanation:

I think the situation here is a horizontal projection to the ground. So in order to find the distance the formula = Ut, where U is the initial speed and t is the Time of flight. To get the time of flight in this case =√2h/g where h is the height and g is gravity. so to get the time = √2×300÷9.81 =7.821 .so range =ut which is equal to the time multiplied by 15m/s =117.30m

Hi there!

To find the total distance traveled, we must find the time taken to fall down.

Ignore the horizontal velocity when dealing with the vertical direction. We can use the simplified equation:

[tex]t = \sqrt{\frac{2h}{g}{}}[/tex]

Plug in the given values:

[tex]t = \sqrt{\frac{2(300)}{9.81}} = 7.821 sec[/tex]

Use the equation:

Δd = vt

Plug in the time and horizontal velocity:

Δd = (15)(7.821) = 117.30m

1 thing you learned about your culture that you did not know



Answers

Answer: That There are diffrent names for my skin color

Explanation:

There is said to be a short circuit when

A. one part of a closed circuit has a very low resistance and almost all the current will flow through this part and very little current will flow through the other part.

B. one part of a parallel circuit has a very low resistance and almost all the current will flow through this part and very little current will flow through the other part.

C. one part of a parallel circuit has a very low resistance and very little of the current will flow through this part and almost all the current will flow through the other part.

D. one part of a closed circuit has a very low resistance and very little of the current will flow through this part and almost all the current will flow through the other part.

Answers

A short circuit is said to have occurred when two nodes of a circuit at different voltages are abnormally connected

There is said to be a short circuit when; One part of a parallel circuit has a very low resistance and almost all the current will flow through this part and very little current will flow through the other part

The correct option is option B.

Reason:

A circuit has to be closed or the the current path has to be closed for

current to flow. A short circuit occurs when current in a circuit flows

through an abnormal path, such as a bridge in a connection to a load that

creates a parallel path for current flow.

Almost all the current flows through the parallel path due to the low

resistance in the connection (almost zero) and the proximity to the power

source, thereby preventing current from reaching its intended destination

Therefore, the correct option is option B.;

Learn more here:

https://brainly.com/question/23779827

https://brainly.com/question/19912277

Other Questions
how many positive integers are there between 100 and 999 that are divisible by 3 or 4 How many x-intercepts would the function shown below have?f(x) = x(x + 4)(x + 4) which individual was asked by the french government to create an assessment tool an intelligence test, of sorts that would be used to identify schoolchildren who would be more likely to have difficulty in school? A package of 8 hot dogs is on sale for $4.00. What is the price per hot dog? i need help what is -2 + y = 8 graphed If x= -2, and y=3, then what is the value ofx^3y+ xy3? Divide -2 1/9 7 3/5. Explain each step you used to find the quotient Find the surface area of a cylinder with a base radius of 4 cm and a height of 7 cm.Use the value 3.14 for a, and do not do any rounding.Be sure to include the correct unit. 5. How does the block quote by Williams in paragraph 5 contribute to the development of ideas in the text? A baseball is traveling ( 30 m/s) and is hit by a bat. It leaves the bat traveling (40 m/s). What is the change in the velocity? Remember that direction is what makes velocity different than speed. 10 m/s 30 m/s 40 m/s 70 m/s please please help me I give brainliest Which equation gives the line shown on the graph? 9 y = 2x + 4 10 9 ON y = 2x 4 y y= 4x + 4 5 1 NEN 3 Y= - 12 - 4 2 1 012 3 4 5 6 7 8 9 10 Briefly discuss the major reasons for global terrorism? does anyone know how to do this? A grocery store chain has $8,505 to buy new shelves. If each shelf costs $7, how many shelves can be purchased? In the figure below m || n find the value of x and the value of the angle labeled (4x) Whom did the United States support as president of South Vietnam? A. H0 Chi Minh B. Shah Reza Pahlavi C. Ayatollah KhomeiniD. Ngo Dinh Diem Triangle BCD with vertices B(-2, 3), C(8, 7),and D(-1, -5): y = x What tool in crime investigation resulted from advances in DNA technology? please help me asap it should go in 5mins