Calculate the average speed of a car which moves 200 km in 10 hours.

Answer:

The cost per week of electricity is Rm 46.8

Explanation:

Electrical Power and Energy

The electrical power consumed by an appliance connected to a voltage V and carrying a current I is given by:

P = V.I

The energy consumed by an electrical appliance of power P during a time t is:

E = P.t

The electrical equipment in an office takes I=13 A when connected to a V=240 V supply.

The power consumed is:

P = 240 V * 13 A

P = 3,120 Watt

Converting to Kilowatt:

P = 3,120/1,000 KW

P = 3,12 KW

If the equipment is used t=30 hours each week, the energy is:

E = 3.12 KW * 30 h

E = 93.6 KWh

Since the cost of each KWh is Rm 0.50, the weekly cost of electricity is:

C = 93.6 * 0.50 = 46.8

The cost per week of electricity is Rm 46.8

Answer:

true

Explanation:

noble gases are octet meaning they they have eight electrons in their outer shell so the are stable

A boy drops a stone of mass 0.5 kg into a well. The stone takes 2 seconds to reach the bottom of the well. then depth of the well is 19.2 m.

Momentum is defined as mass times velocity. it tells about the moment of the body. it is denoted by p and expressed in kg.m/s. mathematically it is written as p = mv. A body having zero velocity or zero mass has zero momentum. its dimensions is [M¹ L¹ T⁻¹]. Momentum is conserved throughout the motion. According to conservation law of momentum initial momentum is equal to final momentum.

A boy drops a stone of mass 0.5 kg into a well

according to kinematics,

s = ut + 1/2at²

initial velocity of the stone is zero

s =  1/2×9.8×2²

s =  1/2×9.8×2²

s =  19.2 m

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The center of mass of the system is at (2,2).

To find the center of mass, we need to use the formula:

Plugging in the given values, we get:

Therefore, the center of mass is located at (2,2).

The center of mass is a point in a system where the entire mass can be assumed to be concentrated. It is the average position of all the mass in the system, calculated by taking the weighted average of the positions of individual masses.

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Given the satatement:

The force on a current carrying wire in a magnetic field is proportional to the current, the length of wire in the field, and the field strength.

Let's detetrmine if the statement is true of false.

The magnetic force on a current carrying wire is proportioal to the following:

(a) current in the wire

(b) Strength of the magnetic field (B)

(c) Length of wire

Hence, we can say that the force on a current carrying wire in a magnetic field is proportional to the current in the wire, the length of the wire in the field, and the strength of the magnetic field.

Therefore, the given statement is True.

ANSWER:

True

Answer:

Explanation:

If launch spot is origin and UP the positive direction.

s = s₀ + v₀t + ½at²

s = 0 + 24.5(1.00) + ½(-9.81)(1.00²)

s = 19.595

rounding to the 3 significant digits of the question numerals

s = 19.6 m  upward

Answer:

Explanation:

d

A rock, a book and a can of soda all have the same mass. They each contain the same amount of matter.

Hence, the correct option is D.

Since the rock, book, and can of soda all have the same mass, it means that they contain the same amount of matter, regardless of their size or the material they are made of.

Mass is a measure of the amount of matter in an object, so if their masses are equal, it implies that the quantity of matter is the same in each of them.

The size, shape, and material composition can be different for each object, but their masses remain the same in this scenario.

Hence, A rock, a book and a can of soda all have the same mass. They each contain the same amount of matter.

Hence, the correct option is D.

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Answer:

a) v = 4.9 m/s at 62° above the horizontal

b) h = 0.94 m above the board or 4.94 m above the water

c) v = 10 m/s at 77° below the horizontal

Explanation:

Assume UP and FOREWARD are positive and the diving board is the origin.

Ignore air resistance.

s = s₀ + v₀t + ½at²

In the vertical

-4 = 0 + vy₀(1.3) + ½(-9.8)(1.3²)

vy₀ = 4.281 m/s

in the horizontal

3.0 = 0 + vx₀(1.3) + ½(0)(1.3²)

vx₀ = 2.307... m/s

v = √(4.281² + 2.307²) = 4.863...

tanθ = 4.281 / 2.307

θ = 61.680...

v² = u² + 2as

s = (v² - u²) / 2a

h = (0² - 4.281²) / 2(-9.8) = 0.9350...

v² = 4.863² + 2(9.8)(4)

v = 10.1019...

cosθ = 2.307/10.1019

θ = 76.798

(a) The initial velocity of Samuel is 4.02 m/s

(b) The maximum height reached by Samuel is 0.55 m

(c)  The final velocity when he enters the water is 5.20 m/s

The given parameter:

(a) The initial velocity of Samuel is calculated as;

\(h = v_o_y t + \frac{1}{2} gt^2\\\\\)

Assume downward motion to be in negative direction

The vertical component of the velocity is calculated as;

\(4 = 1.3\times v_0_y + 0.5\times 9.8\times 1.3^2\\\\4 = 1.3v_{0y} + 8.281\\\\1.3v_{0y} = 4- 8.281\\\\1.3v_{0y} = -4.281\\\\v_{0y} = \frac{-4.281}{1.3} \\\\v_{0y} = -3.293 \ m/s\\\\v_{0y} = 3.293 \ m/s \ \ \ (downwards)\)

The horizontal component of the velocity is calculated as;

Assume forward motion to be in positive direction

\(x = v_{0x}t \\\\3 = 1.3v_{0x}\\\\v_{0x} = \frac{3}{1.3} \\\\v_{0x} = 2.308 \ m/s\)

The resultant of initial velocity is calculated as;

\(v_0 = \sqrt{v_{0y}^2 + v_{0x}^2} \\\\v_0 = \sqrt{3.293^2 + 2.308^2} \\\\v_0 = \sqrt{16.17} \\\\v_0 = 4.02 \ m/s\)

(b) The maximum height reached by Samuel is calculated as;

\(v_f_y^2 = v_0_y^2 + 2gh\\\\at \ maximum \ height \ v_{fy} = 0\\\\0 = v_0_y^2 + 2gh\\\\-2gh = v_0_y^2\\\\h = \frac{v_0_y^2}{-2g} \\\\h = \frac{(3.293)^2}{-2\times 9.8} \\\\h = -0.55 \ m\\\\h = 0.55 \ m \ (downwards)\)

(c) The final velocity when he enters the water;

The height traveled before he hits the water, h = 0.55 m

\(v_f^2 = v_{0}^2 + 2gh\\\\v_f^2 = (4.02)^2 + (2\times 9.8\times 0.55)\\\\v_f^2 = 26.94\\\\v_f = \sqrt{26.94} \\\\v_f = 5.20 \ m/s\)

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Answer:

\(\large \boxed{\mathrm{C. \ \ \frac{500}{7 \times 15 \times 8} \ g/cm^3 }}\)

Explanation:

\(\displaystyle \sf Density = \frac{mass}{volume}\)

\(\displaystyle \rho = \frac{m}{V}\)

\(\sf mass=500 \ g\)

\(\sf volume \ of \ a \ cuboid=width \times length \times height=( 7 \times 15 \times 8) \ cm^3\)

\(\displaystyle \rho = \frac{500}{7 \times 15 \times 8}\)

Answer:

C I did USA testprep

Explanation:

Use the kinetic energy formula:

KE = 1/2 m v^2

m= mass = 49 kg

v = speed

and the potential energy formula:

PE = m g h

g = 9.8 N

h= height = 6 m

PE = 49 x 9.8 x 6 = 2,881.2 J

Since PE = KE

2,881.2 J = KE

2,881.2 = 1/2 x 49 x v^2

2,881.2 = 24.5 x v^2

2,881.2 / 24.5 = v^2

117.6 = v^2

√117.6 = v

v= 10.84 m/s

False - Every object which is not transparent and translucent reflect light. In order to see colours, the object absorb light and reflect the light we see.

Answer:

1030.3504 units

Explanation:

Disk radius = 7 inches

Density at distance x = p(x) = \(\sqrt{10x}\)

Calculate the mass of the two-dimensional object

M = 2\(\pi\)\(\sqrt{10} * (\frac{2}{5} ) *(7)^{\frac{5}{2} }\) = 1030.3504 units

Answer:

hsjdsdddwqdqwdd

Explanation:

Answer:

120 v

Explanation:

The two resistors have an equivalent of    20 * 30 /(20+30) = 12 ohms

  10 amps of current in the circuit

v = ir

  = 10 * 12 = 120 volts

Here is another way:

The two resistors are in prallel so the voltae across both is the same

  use the one on the right      v = ir     =   4 x 30 = 120 v

Explanation:

The force of attraction between two charged objects is given by Coulomb's law:

F = k * (q1 * q2) / r^2

where:

F is the force of attraction

k is Coulomb's constant, which has a value of 9.0 x 10^9 N*m^2/C^2

q1 and q2 are the charges of the two objects

r is the distance between the two objects

In this case, we have two balloons with the same charge of +4.0 x 10^-6 C each, and they are held at a distance of 0.41 m from each other. Plugging these values into Coulomb's law, we get:

F = 9.0 x 10^9 N*m^2/C^2 * [(+4.0 x 10^-6 C)^2] / (0.41 m)^2

F = 1.92 x 10^-3 N

Therefore, the force of attraction between the two balloons is 1.92 x 10^-3 N.

Answer:

c

Explanation:

In Asch's study referenced above, all the questions are answered below.

It states that conformity to land use objective contributes to economic stability in a residential community.

In areas that were not developed all at once or not well planned, individuals purchase vacant lots and set about building on their own homes. These areas suffer from the not having sense of conformity.

Asch measured number of times each individual has conformed to the majority views.  About 32% of individual participated who were placed and conformed with incorrect majority. Over 12 critical trials, 75% of individuals conformed at least once and 25% never conformed.

The reason for individuals to participate is because they have been interviewed after the experiment. Most of the people did not believe in conforming. They still go along due to group fear of being ridiculed. Some believed the group's answers were not correct.

There were two reasons to conform, one is to fit in the group and believed the groups are better informed than they are.

When compared, mostly the answers are found to be incorrect and not satisfying and conformity has increased.

The more difficult is the task, one goes for conformity. When an individual is allowed to answer in private, the conformity decreases.

There is a need to conform because there are fewer groups not so powerful as there is no fear of any rejection.

Thus, all the questions are answered.

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The temperature gradient in the flow of direction is 294525 W.

A temperature gradient is the gradual variance in temperature with distance. The slope of the gradient is consistent within a material. A gradient is established anytime two materials at different temperatures are in physical contact with each other.

Q= T/( L/ KA)

Q= ( 1500 − 450) / 0.15 / 9.35v * 4.35)

   = 294525 W

Units of measure of temperature gradients are degrees per unit distance, such as °F per inch or °C per meter.

Many temperature gradients exist naturally, while others are created. The largest temperature gradient on Earth is the Earth itself. Q= T/Ka.

Therefore, The temperature gradient in the flow of direction is 294525 W.

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Answer:

10x10=100

snoopy ofc :)

Answer:

Labrador Retriever.

hope it will help you

Add 6 and 5, then multiply by 4 is the same as 4(6 + 5). TRUE

4 times greater than 80 + 25 is the same as 4 x (80 + 25). TRUE

Subtract 15 from 42 is the same as 15 − 42. TRUE

9 times greater than 11 + 12 is the same as 9 + 11 + 12. FALSE

9 (11+12)

8 times greater than 21 + 15 is the same as 8(21 + 15). TRUE

Answer:

Prefixed naming convention. All metric units are clearly related to each other using prefixes. ...

The frictional force involved when a penny sinks to the bottom of a wishing well is primarily due to viscous drag or fluid friction. As the penny moves through the water, it experiences resistance from the surrounding fluid. This resistance is caused by the frictional forces between the water molecules and the penny's surface.

Answer:

Because the molecules of matter in a gas are spaced far apart, sound moves slowest through a gas. Sound travels faster in liquids than in gases because molecules are packed more closely together.

Explanation:

7.53 m

We are given:

Initial Horizontal Velocity of the Ball = 4.6 m/s

Initial Vertical Velocity of the Ball = 0 m/s

Height from which ball is kicked = 13.4 m

Time taken by the ball to reach the ground:

The ball has an initial vertical velocity of 0 m/s

it also has a downward acceleration of 10 m/s² due to gravity

Solving for the time taken:

s = ut + 1/2(at²)                 [second equation of motion]

replacing the values

13.4 = (0)(t) + 1/2 (10)(t²)

13.4 = 5t²

t² = 13.4/5                  [dividing both sides by 5]

t² = 2.68

t = 1.637 seconds     [taking the square root of both sides]

Horizontal distance covered by the ball:

Since there are no horizontal opposing forces on the ball,

the ball will more horizontally at a velocity of 4.6 m/s until it hits the ground

We calculated that the ball will hit the ground in 1.637 seconds

Distance covered:

s = ut + 1/2 (at²)                            [seconds equation of motion]

s = ut                                            [since a = 0m/s² in the horizontal plane]

replacing the values

s = 4.6 * 1.637

s = 7.53 m

Hence, the ball landed 7.53 m from the cliff

Answer:

0.5x35=17.5

Explanation:

You throw 0.5 kg the ball leaves your hand with

A speed of 35

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:

The type of evidence that was collected based on the information is a forensic evidence.

From the information, it was stated that Detective Lauren arrives at a crime scene of a drive by shooting. Crime Scene Investigator Molly collected bullet casings. The evidence was collected from the curb of the sidewalk using gloves and placed into baggies.

Therefore, the location where evidence was found is a crime scene.

The person who collected the evidence is Crime Scene Investigator Molly collected bullet casings.

The evidence was collected from the curb of the sidewalk using gloves and placed into baggies.

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Answer:

C

Explanation:

 Phobias are a common thing among people for different reasons, people may be triggered by them for different reasons and have a state of shock or something related to that matter. When you may interact with that type of phobia you may have, you will have a type of reaction. However, it depends quite on your personality. Phobias also mean a fear of something.