A train accelerated from 10km/hr to 40km/hr in 2 minutes. How much distance does it cover in this period? Assume that the tracks are straight?

Answer: It can change its direction

Explanation:

Momentum is a vector, which has magnitude and direction.  An object can have the same speed and mass (magnitude) but if it changes direction, it just changed its momentum

The negative charge on the polyester ball is -1.53 x 10⁻⁶ C.

The given parameters;

The gravitational force on the ball is calculated as follows;

F = mg

F = 0.012 x 9.8

F = 0.12 N

The electrostatic force on the ball is calculated as follows;

\(F= \frac{kq^2}{r^2} \\\\q^2 = \frac{Fr^2}{k} \\\\q = \sqrt{\frac{0.12 \times (0.42)^2}{9\times 10^9}} \\\\q =+/ -\ \ 1.53 \times 10^{-6} \ C\\\\q =-\ \ 1.53 \times 10^{-6} \ C\)

Thus, the negative charge on the polyester ball is -1.53 x 10⁻⁶ C.

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For the beam and loading shown below (a), (b), and (c),

(a) draw the shear and bending-moment diagrams,

(b) determine the maximum absolute values of the shear and bending moment.

(a)

The depth in the lake of pressure 173.693 lb/in² is 122.45 m.

Depth is the distance down either from the top of something to the bottom, or to a distance below the top surface of something.

To calculate the depth in the lake, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values in to equation 1

Hence, the depth in the lake is 122.45 m.

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The work done by the teacher can be calculated using the equation:

work = force x distance x cos(θ)

Here, the force is 10 N, the distance is 20 feet (converted to meters) and the angle between the direction of force and distance is 0 degrees, so cos(0) = 1.

So, work = 10 N x 20 feet x 0.3048 m/foot x 1 = 60.96 J

The teacher did 60.96 joules of work.

Explanation:

Here is the first one....you should try the second one...

Answer:

Explanation:

KE= ½mv²

m = 2KE/v²

m = 2(106)/2.01²

m = 52.47394...

m = 52.5 kg

The mass of the ball will be equal to m= 0.05 kg

Kinetic energy is the energy of motion. An object that has motion - whether it is vertical or horizontal motion - has kinetic energy. There are many forms of kinetic energy - vibrational (the energy due to vibrational motion), rotational (the energy due to rotational motion), and translational

The formula for kinetic energy will be given as

\(\rm KE=\dfrac{1}{2}mv^2\)

It is given that

KE= 106 J=0.106 KJ

Velocity= 2.01 m/s

So the mass will be

\(0.106=\dfrac{1}{2}m(2.01)^2\)

\(m=\dfrac{0.106\times 2}{(2.01)^2}\)

\(m=0.05 \ kg\)

Thus the mass of the ball will be equal to m= 0.05 kg

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Answer:

look for the "W" in the North. Remember that, the "W" may be on its side or inverted to form an "M." If you can recognize the Big Dipper (Ursa Major), the two stars at the edge of the Dipper point toward the North Star (Polaris)

Explanation:

The normal forces that the wall applies to the pusher in ascending order are :Normal force in the third drawing (large angle),Normal force in the first drawing (medium angle),Normal force in the second drawing (small angle).

The normal force is the force that an object exerts on another object that is in contact with it. In the case of a person pushing against a wall, the normal force is the force that the wall applies to the person.

The magnitude of the normal force is determined by the angle at which the person is pushing against the wall. For a given magnitude of the pushing force, the normal force will be smaller when the angle is larger and larger when the angle is smaller.

In the first drawing, the angle is medium, so the normal force will be between the normal force in the second and third drawings.

In the second drawing, the angle is small, so the normal force will be larger than the normal force in the first drawing and smaller than the normal force in the third drawing.

In the third drawing, the angle is large, so the normal force will be the smallest of the three.

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Answer:

Answer in explanation

Explanation:

The path of flow of circuit is called electric circuit. In an electric circuit, resistances are connected in two different ways, which are:

1- Series Combination of Resistances

2- Parallel Combination of Resistances  

Series combination of resistances

In series combination resistors are connected end to end, and there is only one path for the flow of current.  

Characteristics Of Series Circuit:

1. In series circuit there is only one path for the flow of current.

2. Same amount of current flows through each resistor.

I = I₁ = I₂ = I₃ = In

3. Total voltage of the battery is equal to the sum of voltages across each resistor.

V = V₁ +V₂ + V₃ + ... + Vn

4. In series combination the combined resistance of the resistors can be obtained by adding the value of each resistor.

R  =  R₁ + R₂ + R₃ + … + Rn

Parallel combination of resistances

Resistances are set to be connected in parallel, when each of them is connected directly from the terminals of electric source.  

Characteristics Of Series Circuit:

1.  There are more than one path for the flow of current.

2. The value of potential difference remains constant on each resistor.

V = V₁ = V₂ = V₃ = Vn

3. Total current is equal to the sum of current passing through each resistor.

I = I₁ + I₂ + I₃ +...+ In

4. Reciprocal of equivalent resistance is equal to the sum of reciprocals of resistances connected in parallel.  

1/R   =  1/R₁  + 1/R₂  + 1/R₃  + … + 1/Rn  

The circuit diagrams are in attachment.

Answer:

5070

Explanation:

add them up and then you get your answers

Answer:

30 N to the right

Explanation:

i got it on study island

Answer: question one: i cannot tell      Question 2: waxing crescent        Question 3:  waxing gibbous     Question 4:    B

Explanation

The current flowing in the 2Ω and 1Ω is 1.14 A and the current flowing in the 3Ω and 4Ω is 0.286 A.

The value of the current in each resistor is calculated by applying Kirchoff voltage law as follows;

The total voltage in loop 1 is calculated as;

2 + 4 - I₁R₁ - (I₁ - I₂)R₂ - I₁R₃ = 0

6 - 2I₁ - 3(I₁ - I₂) - 1₁ = 0

The current flowing in loop 2 is calculated as;

I = V/R

I₂ = ( 6 V - 4 V ) / (3 + 4)

I₂ = 0.286 A

The value of the current flowing in loop 1 is calculated as;

6 - 2I₁ - 3(I₁ - I₂) - 1₁ = 0

6 - 2I₁ - 3(I₁ - 0.286) - 1₁ = 0

6 - 3I₁ - 3₁ + 0.858 = 0

-6I₁ = -6.858

I₁ = 6.858 / 6

I₁ = 1.14 A

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The potential energy of the roller coaster is 176,400 J (joules).

The potential energy of an object is given by the formula PE = mgh, where PE is the potential energy, m is the mass of the object, g is the acceleration due to gravity, and h is the height or vertical position of the object.

In this case, the roller coaster is at a peak of 20m and has a mass of 900kg. The acceleration due to gravity, g, is approximately 9.8 \(m/s^2\).

Using the formula, we can calculate the potential energy:

PE = mgh

= (900 kg)(9.8 \(m/s^2\))(20 m)

= 176,400 J

Therefore, the potential energy of the roller coaster is 176,400 J (joules).

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Explanation:

There are 1024/2 = 512 SHEETS   (each is numbered on two sides)

  3 inches * 25.4 mm/inch / 512 sheet = .1488 mm per sheet

The component of the weight of the box perpendicular to the incline is mg cos 12. = 335.5 N. The normal reaction force acting on the box is 335.5- 78.2 = 257.3 N.

Answer:

See below

Explanation:

You will need to know the mass of the box......you did not give it in your post.

   Part of the 185 N will decrease the normal force ....this will decrease the frictional forces.      Part of the 185 N will act up the incline....this force less the frictional forces will accelerate the box up the incline according to

                  F = ma....but mass is not given.

Answer:

The only one i did not do was the second one, the one where you rate how you are in the work environment, i did not do that one because i dont know how YOU are ....

Explanation:

Here are the rest....Hope this helps! Brainliest would be much appreciated! Have a great day! :)

The average speed of the whole journey is 54 mph.

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Answer:

at least put the sentences in the Ques. smh

Explanation:

Answer:

B-The world’s largest pancake griddle is located in Penn Yan, NY, and measures 27 feet from end to end.

Explanation:

i got it right on my test

Answer:

0.25 or 1/4

Explanation:

................

The two fields were physical quantities are used in motion calculations are length and mass with time.

The physical quantity in a field is referred as every point in a particular space time.

 If we consider an object, the physical property of the object is considered as physical quantity and to measure that object is known as units. The Physical quantity can be classified as elemental physical quantity and derived physical quantity. Length, mass, time, etc.. are elemental physical quantity, momentum, density, acceleration, etc... are derived physical quantity. Only for charge and temperature the physical quantity will be less than zero.

Length, mass and time  are the physical quantities used in motion calculations.

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We have that the values for F north, F east, F up are

From the Question we are told that

electric force \(F_1 = 1.2 x 10^{-3} N(N)\)

electric force , \(F_2=5.7 x 10^{-4} N(E)\)

electric force , \(F_3=2.2 x 10^{-4} N (U)\)

charge on this ball one \(q_1= 110 nC.\)

charge on this ball two \(q_2= -50 nC.\)

Generally the equation for the F north  is mathematically given as

\(F_N=\frac{F_1}{q_1}\\\\F_N=\frac{ 1.2 * 10^{-3} )}{110}\)

\(F_N=1.09090909*10^{-5}\)

For F East

\(F_E=\frac{F_2}{q_1}\\\\F_E=\frac{5.7 x 10^-4 }{110}\)

\(F_E=5.18181818*10^{-6}\)

For F UP

\(F_U=\frac{F_3}{q_1}\\\\F_U=\frac{2.2 x 10^-4 }{110}\)

\(F_E=2*10^{-6}\)

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Answer: 98000pa

Explanation:Given,

Depth(h)=10m

gravity(g)=9.8m/s

density(δ)=1000kg/m^3

we know,

P=hdg

P=10*1000*9.8

P=98000pa

Answer:

98000pa

Explanation:

Depth =10m

gravity = 9.8m/s

density= 1000kgm^3

We know

p=pdg

p=10×1000×9.8

p=98000pa

Answer:

According to the law of conservation of momentum, the total momentum before the collision is equal to the total momentum after the collision. Since Sharon's puck stops after the collision, all of its momentum is transferred to Kaylyn's puck. Therefore, the resulting momentum of Kaylyn's puck is equal to the initial momentum of Sharon's puck:

m1v1 = m2v2

where m1 and v1 are the mass and velocity of Sharon's puck before the collision, and m2 and v2 are the mass and velocity of Kaylyn's puck after the collision.

Substituting the given values:

0.3 kg × 6 m/s = 0.3 kg × v2

Simplifying:

1.8 kg m/s = 0.3 kg × v2

Dividing both sides by 0.3 kg:

v2 = 6 m/s

Therefore, the resulting velocity of Kaylyn's puck should be equal to the velocity of Sharon's puck before they collided, which is 6 m/s.

Answer: A. Equal to the velocity of Sharon's puck before they collided.