An object has a coefficient of kinetic friction of 0.2 and a normal force of 30N. Find the force of kinetic friction.

Answer:

Extreme temperatures can increase demand for heating and cooling, and the resulting increases in electricity demand can push up fuel and electricity prices.

Explanation:

Answer:

10 m/s

Explanation:

divide 150 by 15

Answer:

[tex]\boxed {\boxed {\sf D. \ 10 \ m/s}}[/tex]

Explanation:

Momentum can be found by multiplying mass by velocity.

[tex]p=mv[/tex]

If we rearrange this formula for velocity (v), then the formula becomes:

[tex]\frac{p}{m}=\frac{mv}{m}[/tex]

[tex]\frac{p}{m} =v[/tex]

We have to divide the momentum by the mass. The momentum is 150 kg*m/s and the mass is 15 kilograms.

[tex]p=150 \ kg*m/s\\m=15 \ kg[/tex]

Substitute the values into the formula.

[tex]\frac{150 \ kg *m/s}{15 \ kg} =v[/tex]

Divide. Note that the kilograms (kg) will cancel each other out.

[tex]10 \ m/s=v[/tex]

The velocity of the object is 10 meters per second.

Answer:

Candle

Explanation:

The moon is an illuminated object, while a candle is a luminous object!

Answer:

Candle

Explanation:

I just took the test

Answer:

q₂ = 3.81 x 10⁻⁸ C = 38.1 nC

q₁ = 7.63 x 10⁻⁸ C = 76.3 nC

Explanation:

The force between two charges is given by Coulomb's:

F = kq₁q₂/r²

where,

F = Force = 0.00081 N

k = Coulomb's Constant = 9 x 10⁹ Nm²/C²

q₁ = magnitude of 1st charge

q₂ = magnitude of second charge

r = distance between charges = 18 cm = 0.18 m

Therefore,

0.00081 N = (9 x 10⁹ Nm²/C²)q₁q₂/(0.18 m)²

q₁q₂ = (0.00081 N)(0.18 m)²/(9 x 10⁹ Nm²/C²)

q₁q₂ = 2.916 x 10⁻¹⁵ C²

q₁ = 2.916 x 10⁻¹⁵ C²/q₂   --------------- equation (1)

It is given that:

q₁ = 2q₂   --------------- equation (2)

Comparing equation (1) and equation (2):

2q₂ = 2.916 x 10⁻¹⁵ C²/q₂

q₂² = 2.916 x 10⁻¹⁵ C²/2

q₂ = √14.58 x 10⁻¹⁶ C²

q₂ = 3.81 x 10⁻⁸ C = 38.1 nC

using this value in equation (2):

q₁= 2(3.81 x 10⁻⁸ C)

q₁ = 7.63 x 10⁻⁸ C = 76.3 nC

Answer:

1.5g/cm³

Explanation:

Given parameters:

Initial volume of the liquid  = 30cm³

Final volume of the liquid  = 50cm³

Mass of the liquid  = 30g

Unknown:

Density of the liquid  = ?

Solution:

Density is the mass per unit volume of a substance.

  Density  = [tex]\frac{mass}{volume}[/tex]  

volume of the liquid  = final volume - initial volume  =  50cm³  -  30cm³

 volume of the liquid  = 20cm³

Density  = [tex]\frac{30}{20}[/tex]   = 1.5g/cm³

Answer:

Two atoms from column 1. Each would give 1 electron to the Oxygen. Oxygen will be 2- and each group 1 ion will be 1+

Explanation:

Sorry if Im wrong

Answer:

a = 5 [m/s²]

Explanation:

To solve this equation we must use the following equation of kinematics.

[tex]v_{f} =v_{o} +a*t[/tex]

where:

Vf = final velocity = 25 [m/s]

Vo = initial velocity = 5 [m/s]

a = acceleration [m/s²]

t = time = 4 [s]

Note: The positive sign for the acceleration in the above equation means that the car is increasing its velocity.

25 = 5 +a*(4)

25 - 5 = 4*a

20 = 4*a

a = 5 [m/s²]

Answer:

false here is why :)

Explanation:

Regular, moderate-intensity physical activity reduces the risk of developing coronary heart disease and can reduce the likelihood of dying from heart disease.

hope this helped.

Explanation:

Both galaxies show bicones of high ionisation gas extending along their minor axes. In NGC 4676A the high gas velocity .

please. follow. me

Answer:

20 N in West direction.

Explanation:

opposite forces cancel each other. so 20 N in north and 20N in south cancel each other. In west and east direction...

70N in west-50N in east= 20N in west

weather is everyday things

weather could be a hurricane

weather could be a tornado

climate is more long term over time

example the climate in Antarctica is cold because it happens over long periods overtime

I don't understand the question

Answer:

As the ball falls from C to E, potential energy is converted to kinetic energy. The velocity of the ball increases as it falls, which means that the ball attains its greatest velocity, and thus its greatest kinetic energy, at E. 19.

Explanation:

hello

Explanation:

I haven't read the poem because you didn't attach it but here is my go at answering the question- although we find it hard to imagine being lonely while with others... if you lack emotional or intellectual connection even being physically near someone you are not mentally there

Let me try:

Normal force= 169.74N

Coefficient of kinetic friction= 0.577

Explanation

a. For a given inclined plane, normal friction is equal to the force perpendicular to the plane which is equal to

mgcos theta = 20×9.8× cos30 = 169.74N

b. The coefficient of kinetic friction for an inclined plane is given as

tan theta =tan 30 = 0.577

Velocity is size and direction

Answer:

force=1250kg * 30m/s+10

Explanation: it's a change in acceleration

Answer:

This system uses angular momentum and torque to do work on objects, typically against the force of gravity. The wheel and axle simple machine is closely related to gears.

Answer:

Negatively charged, to positively charged parts

Explanation:

Electrons are negative, negative is attracted to positive.

Answer:

agear lever or agear stick is the lever that you use to change gear in acar or other vehicle

Answer:

it is a the answer is a btw

Explanation:

Answer:

(a) Cyclist A travels faster.

(b) The time taken by cyclists A and B is 10 minutes and 8.58 minutes respectively.

Explanation:

Given that the speed of cyclist A= 24 km/h

As 1 km = 1000 m and 1 hour= 3600 seconds.

So, [tex]24 \frac {km}{h}=24\times \frac{1000 m}{3600 s}=\frac{20}{3}\frac {m}{s}=6.67 m/s[/tex]

and the speed of cyclist B = 6.8 m/s.

The length of the road = 4 km=4000 m.

(a) Speed of cyclist A is 6.67 m/s which is more than the 6.8 m/s.

Hence, cyclist A travels faster.

(b) If d be the distance to be traveled and V be the speed, than the time, t, required is,

[tex]t=\frac{d}{V}\cdots(i)[/tex]

For cyclist A:

As A is located at the beginning of the road, he has to cover full length of the road.

So, the distance to be covered by cyclist A =4 km.

Hence, from equation (i), the time taken by cyclist A is

[tex]t=\frac{4}{24}=\frac{1}{6}[/tex] hour

[tex]=\frac{1}{6}\times {60}=10[/tex] minutes. [ as 1 hour = 60 minumes]

So, time taken by cyclist A is 10 minutes.

For cyclist B:

As B is located 500 meters later from the beginning of the road, he has to cover the remaining length of the road.

So, the distance to be covered by cyclist B =4000 m-500 m= 3500 m.

Hence, from equation (i), the time taken by cyclist B is

[tex]t=\frac{3500}{6.8}=514.71[/tex] seconds

As 60 seconds= 1 minute.

So, t= 514.71/60 minutes = 8.58 minutes.

[tex]=\frac{1}{6}\times {60}=10[/tex] minutes. [ as 1 hour = 60 minumes]

So, the time taken by cyclist B is 8.58 minutes.

Answer:

Focal length

Explanation: No need for one...

Focal length  is unnecessary to include when accurately drawing ray diagrams.

The focal length is the distance, in millimeters, between the lens' optical center and the camera sensor, which records light data.

The elements inside the housing of a lens bend and shape light as it enters the front so that it converges into a single point of focus known as the "optical center."

It is crucial to remember that this measurement is made with the camera set to infinity and that lenses are named according to their focal length, which is indicated on the lens' barrel.

Therefore, Focal length  is unnecessary to include when accurately drawing ray diagrams.

To learn more about Focal length, refer to the link:

https://brainly.com/question/23276372

#SPJ6

Answer:

m = 20,000 kg

Explanation:

Force, [tex]F=2.5\times 10^4\ N[/tex]

Acceleration of the shark, [tex]a=1.25\ m/s^2[/tex]

It is required to find the mass of the shark. Let m is the mass. Using second law of motion to find it as follows :

F = ma

Putting the value of F and a to find m

[tex]m=\dfrac{F}{a}\\\\m=\dfrac{2.5\times 10^4}{1.25}\\\\m=20,000\ kg[/tex]

So, the shark's mass is 20,000 kg.

I think there's a typo in the question...

Vertically, the box is in equilibrium, so its weight and the normal force (magnitudes w and n, respectively) are such that

n + (-w) = 0

The box has mass 70 kg, and assuming gravitational acceleration with magnitude g = 9.80 m/s², it has a weight of

w = (70 kg) g = 686 N

and hence

n = 686 N

Horizontally, the box is accelerated 3.0 m/s², so the net force acting on it is

∑ F = (70 kg) (3.0 m/s²) = 210 N

and the only forces acting in this dimension are the pulling force with magnitude 130 N and the friction force with magnitude f so that

130 N - f = 210 N

The friction force is proportional to the normal force by a factor of µ, the coefficient of kinetic friction, so that

f = µ n

and so we have

130 N - µ (686 N) = 210 N   →   µ ≈ -0.117

but µ can't be negative!

The problem is that the pulling force should have a magnitude larger than that of the net force, so either the given mass, acceleration, or pulling force are incorrect.