The train took 2 h 30 min to travel 3/5 of a journey at an
average speed of 96 km/h. If the train would complete the
journey in 4.1 h, what is the train's average speed for the
remaining journey?
km/h

The luminosity is a measure of the electromagnetic power of a source of light, therefore, its unit of measure is "Watts". Therefore, the term that best describes the luminosity of the sun is "Wattage".

The distance traveled by the pool ball is 0.376 m.

To calculate the distance traveled by the ball, we need to first find the resultant velocity of the ball.

This is the single velocity obtained when two or more velocities are combined.

To calculate the resultant velocity, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Finally, to calculate the total distance, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute into equation 2

Hence, the distance traveled by the pool ball is 0.376 m.

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a) The distance from that point on the Moon to the Earth must be less than 3.456 * 10⁸ m.

b)  The acceleration, a, at that point is 3.33 * 10⁻³ m/s².

The distance from that point on the Moon to the Earth is calculated using the formula below as follows:

rM = √(mE/mM) * r ) / (1 + √(mE/mM)

where;

rM is the point where the forces from the Earth and the Moon are the same

r is the distance between Earth and Moon = 3.84 * 10⁸ m

mE is the mass of the Earth = 5.98 * 10² kg

mM is the mass of the Moon = 7.36 * 10²² kg

simplifying and substituting the values:

rM = 9 * 3.84 * 10⁸ m / 10

rM = 3.456 * 10⁸ m

Hence, the point is at a distance of less than 3.456 * 10⁸ m.

b) The acceleration, a, at that point is determined as follows

a = G * mE / (rM2)

where;

G is the gravitational constant = 6.67 * 10⁻¹¹ Nm²/kg²

substituting the values:

a = 6.67 *10⁻¹¹ * 5.97 * 10²⁴ / (3.456 * 10⁸)²

a = 3.33 * 10⁻³ m/s²

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B. A chemical change

Explanation:

I'm guessing ?

Laser printers work with the use of heat and positive and negative charges of the plastic ink dots themselves.

Option A is correct.

Heat and both positive and negative charges power laser printers. Text or images are imprinted with a negative charge by the laser on areas of the printer drum. The locations on the drum that have this negative charge attract the dust of plastic ink.

A laser printer operates on the principle of static electricity. By applying an electrical current to the photoreceptor drum at first, corona wire gives it a positive charge. After that, in accordance with the information sent by the computer, the printer projects a tiny laser beam horizontally across the surface.

Incomplete question :

A.Laser printers work with the use of heat and positive and negative charges.

B.The laser etches a negative charge on spots of the printer drum in the form of text or images.

C.The plastic ink dust is attracted to the places on the drum with this negative charge.

What is the charge of the plastic ink dots themselves

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Answer:

x = A sin ω  t      equation of motion

max speed = A ω

max distance (max value of x) = A

max KE = 1/2 m V^2 = 1/2 m A^2 ω^2

f (frequency) =  ω / 2 π = 1 / T     or T =  2 π /  ω

ω = 2 π / T     substitute for ω to put in terms of T

There is more to the Earth than what we can see on the surface. In fact, if you were able to hold the Earth in your hand and slice it in half, you'd see that it has multiple layers. But of course, the interior of our world continues to hold some mysteries for us. Even as we intrepidly explore other worlds and deploy satellites into orbit, the inner recesses of our planet remains off limit from us.

However, advances in seismology have allowed us to learn a great deal about the Earth and the many layers that make it up. Each layer has its own properties, composition, and characteristics that affects many of the key processes of our planet. They are, in order from the exterior to the interior – the crust, the mantle, the outer core, and the inner core. Let's take a look at them and see what they have going on.

Like all terrestrial planets, the Earth's interior is differentiated. This means that its internal structure consists of layers, arranged like the skin of an onion. Peel back one, and you find another, distinguished from the last by its chemical and geological properties, as well as vast differences in temperature and pressure.

Explanation:

If A box of mass 210 kg is pulled from rest with a string of tension 1300n inclined at 35° to the horizontal. if the box moved with a speed of 10m/s and the frictional force between the box and surface is 100 n, Then the distance covered by the box is 10.89 meters.

To calculate the distance covered by the box, we need to analyze the forces acting on it and apply the work-energy principle.

Given:

Mass of the box, m = 210 kg

Tension in the string, T = 1300 N

The angle of inclination, θ = 35°

Frictional force, f = 100 N

Initial speed, u = 0 m/s

Final speed, v = 10 m/s

First, let's resolve the tension force into components parallel and perpendicular to the incline. The parallel component of the tension force can be calculated as:

T_parallel = T * cos(θ)

Next, let's calculate the net force acting on the box along the incline. The net force is given by:

Net force = T_parallel - f

Now, using Newton's second law, we can calculate the acceleration (a) of the box:

Net force = m * a

From the given information, we have the final velocity (v), initial velocity (u), and acceleration (a). We can use the following kinematic equation to calculate the distance covered (s):

v^2 = u^2 + 2as

Rearranging the equation, we get:

s = (v^2 - u^2) / (2a)

Now, let's plug in the given values and calculate the distance covered:

T_parallel = 1300 N * cos(35°) ≈ 1067.35 N

Net force = 1067.35 N - 100 N = 967.35 N

a = (967.35 N) / (210 kg) ≈ 4.61 m/s^2

s = (10 m/s)^2 - (0 m/s)^2 / (2 * 4.61 m/s^2) ≈ 10.89 m

Therefore, the distance covered by the box is approximately 10.89 meters.

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Answer:

T=F/A

Explanation:

T= shear stress

F=applied force

A=cross sectional area

shear stress, force tending to cause deformation of material by slippage along a plane or planes parallel to the imposed stress, the resultant shear is of a great importance in nature, being intimately related to the downslope movement of earth materials and earthquakes.

Answer:

the answer is B.

Answer:

light

Explanation:

you can see stuff in space but cant hear it

Mass of book will be m = 4.495 kg  

The force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface is called gravitational force

Force = 2.68 x 10-8 N

mass of student(M)  = 55

mass of book=?

distance = 0.435m

gravitational constant (G)=6.67×10^-11

gravitational force (F)=2.68×10^-8

gravitational force (F) = (G*M*m) /\(d^{2}\)

2.68 x 10-8  = ((6.67×10^-11) * ( 55 ) * m) / 0.435

m = 4.495 kg

Mass of book will be m = 4.495 kg  

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Answer:

acellus students

Explanation

1.382

Complete Question

Partial tides __________.

Question 7 options:  

a. represent various components of local tides that are resolved mathematically  

b. are added together to predict the height and timing of astronomical tides  

c. consist of 4 components due to the influence of celestial bodies  

d. consist of up to 60 components due to astronomical and non-astronomical factors  

e. All of the above except c are correct.

Answer:

Option E

Explanation:

Generally

Partial tides represent various components of local tides that are resolved mathematically

Partial tides  are added together to predict the height and timing of astronomical tides

Partial tides consist of up to 60 components due to astronomical and non-astronomical factors

But Partial tides do not consist of 4 components due to the influence of celestial bodies

Therefore

All of the above except c are correct.

Option E

As a derivative of behaviorism, the learning principles that are the basis for behavior modification are considered empirically valid.

The concepts of operant conditioning, which were created by behaviourist B.F. Skinner, are the foundation of behaviour modification, a therapeutic strategy. In order to increase desired behaviours and decrease undesirable ones, it entails altering an individual's behaviour through reinforcement, punishment, or extinction.

The concepts of operant conditioning have been thoroughly investigated and put to the test through empirical research, and it has been discovered that they are successful in changing behaviour. As a result, because they are backed by research, the learning principles that underlie behaviour modification are regarded as empirically valid.

Behaviorism is a psychological perspective that places more emphasis on outward influences and observable behaviours than it does on internal mental processes. Behaviorism is a highly influential and well-respected school of psychology because its principles, including classical and operant conditioning, have been thoroughly investigated and empirically supported.

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Answer:

Law of nature, in the philosophy of science, a stated regularity in the relations or order of phenomena in the world that holds, under a stipulated set of conditions, either universally or in a stated proportion of instances. ...

It is not killing plants the same thing as this...

Example:natural law in our society is that it is wrong for one person to kill another person.

Answer:

F=w=ma                                                                                                                                                       OR by using equations of motions                                                                               vf=vi-at                    : a=vf-vi/t                                                              eq 1                         s=vit+1/2at squre                                                                                 eq 2                     2as=vf squre - vi squre                                                                        eq 3                                                                                                                                                                                  

Explanation:

where m is the mass of falling body , f is the weight is the force acting down ward , vf is the final velocity, vi is the inetial velocity , t is the time and s is the distance covered by a body.

The absolute pressure at an ocean depth of 1.0 x 10^3 m is 1.002 x 10^8 Pa.

Hydrostatic pressure is the pressure that a fluid exerts on a surface due to the weight of the fluid above it. It is the result of the force of gravity acting on a column of fluid, and it is directly proportional to the height of the column of fluid and the density of the fluid.

The absolute pressure at an ocean depth of 1.0 x 10^3 m can be calculated using the hydrostatic pressure equation:

P = ρgh + Po

where:

P is the absolute pressure at the given depth

ρ is the density of the water

g is the acceleration due to gravity (assumed to be 9.81 m/s²)

h is the depth of the ocean

Po is the atmospheric pressure at the surface (assumed to be 1.01 x 10^5 Pa)

Substituting the given values, we get:

P = (1.025 x 10^3 kg/m³) x (9.81 m/s²) x (1.0 x 10^3 m) + 1.01 x 10^5 Pa

P = 1.025 x 9.81 x 10^6 Pa + 1.01 x 10^5 Pa

P = 1.002 x 10^8 Pa.

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Answer:

6 ft

Explanation:

A plane mirror shows you at the actual distance from the mirror, so if a person stood right next to the mirror, he/she will see your image at a distance of 3 feet but since you are at a distance of 3 ft away from the mirror and the image formed is 3 ft inside the mirror

The image will be at a distance of 6 feet from you

The total distance is 105 kilometers and the total displacement is 15 kilometers east. Option C

To calculate the total distance, we add the distances traveled in each leg of the journey: 60 kilometers (from A to B) + 45 kilometers (from B back to A) = 105 kilometers.

However, displacement refers to the change in position of an object in a straight line from its starting point to its ending point. In this case, since the boat starts and ends at the same point (A), the total displacement is zero.

Hence The total distance is 105 kilometers and the total displacement is 15 kilometers east.

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C is found using the Pythagorean theorem:

C = sqrt(a^2 + b^2)

Answer:

the weight of the air in pound-force (lb-f) is 325.8 lbf

Explanation:

Given;

dimension of the room, = 15 ft by 15 ft by 20 ft

density of air in the room, ρ = 0.0724 lbm/ft³

The volume of air in the room is calculated as;

Volume = 15 ft x 15 ft x 20 ft = 4,500 ft³

The mass of the air is calculated as;

mass = density x volume

mass = 0.0724 lbm/ft³  x  4,500 ft³

mass = 325.8 lb-m

The weight of the air is calculated as;

Weight = mass x gravity

Weight = 325.8 lb-m x 32.174 ft/s²

Weight = 10482.29 lbm.ft/s²

The weight of the air in pound-force (lb-f) is calculated as;

1 lbf = 32.174 lbm.ft/s²

\(Weight =10,482.29\ lbm.ft/s^2\times \frac{1 \ lbf}{32.174 \ lbm.ft/s^2} \\\\Weight = 325.8 \ lbf\)

Therefore, the weight of the air in pound-force (lb-f) is 325.8 lbf

Answer:

Explanation:

charge on each proton = 1.6 x 10⁻¹⁹ C

mass of proton = 1.67 x 10⁻²⁷ kg

Electrostatic force of repulsion Fe = 9 x 10⁹ x ( 1.6 x 10⁻¹⁹ )² / d²

= 23.04 x 10⁻²⁹ / d²

Gravitational  force of attraction = G Mm / d²

M = m = 1.67 x 10⁻²⁷ kg

Gravitational  force of attraction  Fg = 6.67  x 10⁻¹¹ x ( 1.67 x 10⁻²⁷ )² / d²

= 18.60 x 10⁻⁻⁶⁵ / d²

So Fg is far less than Fe and former is attractive , later is repulsive .

Fe > Fg, opposite direction , is the answer .

Answer:

Explanation:

v(t) = 12 sin(913t + 71°) volts

a )  913° = (π / 180) x  913 radians

= 15.92 radians

a ) angular frequency  ω = 15.92 radians / s

b ) ω = 2πn

n = ω / 2π

= 15.92 / 2 x 3.14

= 2.53 Hz

c ) Period = 1 / n

= 1 / 2.53 = .4 s .

d )

Maximum voltage = 12 volt

e) Minimum volts = - 12 volts

g  ) rms volts = V / √2

= 12 / √2

= 8.48 V

h )

Average voltage = 0

j ) Average power

Vrms² / R

= 12 x 12 / 2 x 220

= .327 W.

k )

v(t) = 12 sin(913t + 71°)

v(t) = 12 sin(913x .003 + 71°)

=  12 sin(73.7°)

= 11.5 V .

To find the mass of the object, we can use the formula for kinetic energy:

Kinetic energy (KE) = (1/2) * mass * velocity^2

Given that the kinetic energy is 426 J and the velocity is 13 m/s, we can rearrange the equation to solve for the mass:

mass = (2 * KE) / (velocity^2)

Substituting the given values:

mass = (2 * 426 J) / (13 m/s)^2

mass = (2 * 426 J) / (169 m^2/s^2)

mass = 852 J / 169 m^2/s^2

mass = 5.04 kg

Therefore, the mass of the object is 5.04 kg.

Answer:

B. Containing charged regions

Explanation:

The term i.e. intermolecular forces would be used to explain the attraction forces. Here the interaction would be done between molecules etc that acts between the acts & the other types of particles i.e. neighboring like atoms or ions

So in the given case, the option b would be contributed to the molecules that have intermolecular forces

hence, the option b is correct

Answer:

40 because if it is the same weight then there is no weight to make the ride slower so it 40

Explanation:

There is a zero induced magnetic field in the image shown in A.

We know that the principle of electromagnetic induction states that there would be an induced emf only when there is a change in the induced magnetic flux. In this case, we would have to look at each of the images so as to know where there is no change in the magnetic flux.

The induced current is zero in a conductor when there is no change in magnetic field passing through it as shown in image A.

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Answer:

The equation of D = m/V

Where D = density

m = mass

and V = volume

We are solving for V, so with the manipulation of variables we multiply V on both sides giving us  

V(D) = m  

now we divide D on both sides giving us

V = m/D  

We know our mass which is 600g and our density is 3.00 g/cm^3

so

V = 600g/3.00g/cm^3 = 200cm^3  or 200mL

a cubic centimeter (cm^3) is one of the units for volume. It's exactly like mL. 1 cm^3 = 1 mL

If you wish to change it to L, you'd have to convert

Explanation:

Programmable Array Logic (PAL) has a programmable AND array and a fixed OR array.

Programmable Array Logic (PAL)  is a logic device.

Hence PAL has programmable AND array and a fixed OR array.

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