**Answer:**

There are four types of orbitals that you should be familiar with s, p, d and f (sharp, principle, diffuse and fundamental). Within each shell of an atom there are some combinations of orbitals

A 66 kg student stands on a very light, rigid board that rests on a bathroom scale at each end as shown in (Figure 1).

The **reading **on the **scale** is** **equal to the **weight **of the **student **which is** 646.8 N.**

The given parameters;

The **reading **on the **scale **is determined by applying** Newton's second law **of motion as follows;

[tex]R = ma+ mg\\\\R = m(a + g)\\\\R = m(0 + g)\\\\R = mg[/tex]

*The student is at rest and not accelerating, a =0*

[tex]R = 66 \times 9.8\\\\R = 646.8 \ N[/tex]

Thus, the **reading **on the **scale** is** **equal to the **weight **of the **student **which is** 646.8 N.**

The complete question is below:

A 66 kg student stands on a very light, rigid board that rests on a bathroom scale at each end as shown in (Figure 1). what is the reading on the scale?

Learn more about ** Newton's second law **here: https://brainly.com/question/3999427

An 50 kg student runs and jumps onto a 25 kg tire swing, which is initially at rest, and rides the swing up into the air. The swing (and the student) then rises a vertical distance of 1.5 m. What was the initial speed, in m/s of the swing? Remember the acceleration due to gravity near Earth's surface, g = 9.81 m/s^2

A. 29 m/s

B. 5.4 m/s

C. 1.7 m/s

D. 15. m/s

E. 3.8 m/s

Will mark brainliest

**Answer:**

Option B, 5.4m/s

**Explanation:**

Using the formula v² = u ² - 2gh

v = 0(final velocity is zero at maximum height), u = ?, g = 9.81m/s², h = 1.5m

0² = u² - 2×9.81×1.5

0 = u² - 29.43

29.43 = u²

u = √29.43

= 5.42m/s

How long will it take a projectile to hit the ground if it is launched at 4.2 m/s off a 12.6 m high platform?

**Answer: 3**

**Explanation: **

I think you are supposed to divided in those problems? I'm not sure but if you aren't then please let me know. The equation I did was:

12.6 / 4.2 = 3

Hope this helps!! :)

Mass can be measured with a triple

beam balance in units of

Resources

A. grams

B. Newtons

C. cubic centimeters

D. millimeters

**Answer:**

It can be measure by grams

Imagine that you are going to visit your friend. Before you get there, you decide to stop at the variety store. If you walk 200 m (N) from your home to the store, and then travel 600 m [S] to your friend's house, what is your total displacement?

**Answer:**

400m

**Explanation:**

**Brainliest? :))**

Let your initial displacement from your home to the store be

Dd

>

1 and your displacement from the store to your friend’s house

be Dd

>

2.

Given: Dd

>

1 = 200 m [N]; Dd

>

2 = 600 m [S]

Required: Dd

>

T

Analysis: Dd

>

T 5 Dd

>

1 1 Dd

>

2

Solution: Figure 6 shows the given vectors, with the tip of Dd

>

1

joined to the tail of Dd

>

2. The resultant vector Dd

>

T is drawn in red,

from the tail of Dd

>

1 to the tip of Dd

>

2. The direction of Dd

>

T is [S].

Dd

>

T measures 4 cm in length in Figure 6, so using the scale of

1 cm : 100 m, the actual magnitude of Dd

>

T is 400 m.

Statement: Relative to your starting point at your home, your

total displacement is 400 m [S].

I'll give brainlest

*the first pic is for Alberto and second for the mouse*

Question 1

Alberto created a graph to illustrate his trip. Answer the questions below.

A. How does Alberto's motion change at point B?

B. What is Alberto's speed from point C to point D?

C. What happens at point D? (1 point)

Question 2

Answer the question below about Smokey The Mouse.

A. Use inertia to explain how a balanced force will affect his motion. (Newton's 1st Law)

B. What are two ways Smoky can increase his speed? (Use Newton's 2nd Law to help you)

C. What is an example of an action and reaction at work in this picture? (Use Newton's 3rd Law to help you)

**Answer:**

The mouse exerts a force on the ground and the ground exerts an equal and opposite reaction force on the mouse.

At point B, Alberto's distance covered increases with time, equal distance is covered in equal time interval. The speed increases uniformly. At the point C to D, the distance covered with time remains the same. At the point D, equal distance is no longer covered in equal time intervals.

According to the law of inertia, an object will remain at rest or in a state of uniform motion unless it is acted upon by an unbalanced force. This means that smokey mouse will continue moving uniformly unless a force acts on it.

From Newton's second law; F = ma and a = F/m. F = force , m= mass, a = acceleration. This implies that smokey mouse can increase its speed by;

Increasing the force acting on the mouse

Decreasing the mass of the mouse

Action and reaction is encountered as the mouse is walking. The mouse exerts a force on the ground and the ground exerts an equal and opposite reaction force on the mouse.

**Explanation:**

Question 5. One 1,5V battery runs a portable MP3 player that draws 5,7mA of current

for about six hours before it runs out.

a) What is the resistance If the portable MP3 player?

b) How much power is dissipated in the portable MP3 player?

c) Find the energy delivered by the portable MP3 player?

First, convert the values of the units to S.I units (otherwise the final answer may be wrong):

P.D = 1.5 volts

Current = 5.7 x 10^-3 amps

Time = 21600 seconds

a) To find resistance, you can use the equation V=IR and rearrange it to find the resistance.

Resistance = p.d / current

Resistance = 1.5 / 5.7x10^-3

Resistance = 263.2 ohms (rounded to 1dp)

b) To find power, you can use the following equations to calculate power:

P=VI

P=I^2 R

P = V^2 / R

P = E/T

You can use any of the equations and still get the right answer, however it's best to use the equations which have the values that you already know from the questions.

I used P=VI:

Power = p.d x current

Power = 1.5 x (5.7x^-3)

Power = 8.55 x 10^-3

c) To find energy, you can use the equation E=PT.

Energy = power x time

(Using the value of power from the previous question)

Energy = (8.55x10^-3) x 21600

Energy = 184.68 joules

Hope this helps :)

P.D = 1.5 volts

Current = 5.7 x 10^-3 amps

Time = 21600 seconds

a) To find resistance, you can use the equation V=IR and rearrange it to find the resistance.

Resistance = p.d / current

Resistance = 1.5 / 5.7x10^-3

Resistance = 263.2 ohms (rounded to 1dp)

b) To find power, you can use the following equations to calculate power:

P=VI

P=I^2 R

P = V^2 / R

P = E/T

You can use any of the equations and still get the right answer, however it's best to use the equations which have the values that you already know from the questions.

I used P=VI:

Power = p.d x current

Power = 1.5 x (5.7x^-3)

Power = 8.55 x 10^-3

c) To find energy, you can use the equation E=PT.

Energy = power x time

(Using the value of power from the previous question)

Energy = (8.55x10^-3) x 21600

Energy = 184.68 joules

Hope this helps :)

Jeremiah rides his bicycle 4 miles in 30 minutes. If he maintains this rate, how far will he ride in 3 hours?

**Answer:**

24 miles.

**Explanation:**

3 hours=180 minutes

180÷30=6

6x4=24

alcohol thermometer cannot measure the thermometer of boiling water ,why?

**Explanation:**

The contents of alcohol are less toxic and will evaporate quickly as compared to the mercury-in-glass thermometer. Since, alcohol starts boiling at 80℃ while the boiling point of mercury is 375℃. ... So, an alcohol thermometer cannot measure the temperature of boiling water as it has the limit to measures up to 80℃.

Energy stores in food would be considered what

**Answer:**

Energy stored in food is consider as carbohydrate,protein,fats,etc.

explain maximum and minimum thermometer working(answer only for points will be reported)

**Explanation:**

Which of these ALL require direction? Force, Time, Acceleration Displacement, Velocity, Force Mass, Time, Speed Speed, Velocity, Distance

PLS ANSWER QUICK!!!!

**Answer:**

force, acceleration, displacement, velocity requires direction

what is momentum?

what is period of an oscillating body?

what is friction?

**Answer:**

**Explanation:**

Momentum is the quantity of motion of a moving body, measured as a product of its mass and velocity.

The period of an oscillating body is the smallest interval of time in which a system undergoing oscillation returns to the state it was in at a time arbitrarily chosen as the beginning of the oscillation.

Friction is a force between two surfaces that are sliding, or trying to slide, across each other. Friction always slows a moving object down. The amount of friction depends on the materials from which the two surfaces are made. The rougher the surface, the more friction is produced.

Ali kicks a soccer ball upward at 45° angle

with an initial speed of 32 m/s. What

expression should Ahmed use to calculate

the magnitude of the ball's initial velocity

the horizontal direction?

Select one:

a. 32 sin(45°) m/s

b. 32 cos(45°) m/s

c. 32 tan(45°) m/s

d. 45 m/s

**Answer:**

the answer is 32sin(45°)m/s

I keep people warm I come in many different colors, styles, and materials. many people use me when they sit on a couch

**Answer:**

a seat

**Explanation:**

The phrase “seat value” is used in the **hospitality **and bar sectors to describe how much money each seat or square foot of customer area must **generate **to justify its existence.

An **area** to sit is a seat. The phrase may also refer to headquarters in a more general meaning as well as extra **elements **such a back, armrest, and head restraint.

Being in the centre **allows **you to benefit from both the advantages of both front and back seating while balancing out their extremes. While you're still close enough to be paying **careful **attention to the lecture, the middle rows will relieve you of the pressure and expectations of the front.

By remaining seated, **students** help avoid physical **altercations**. There is more time spent on task when pupils are seated.

**Environmental **psychology, which gives people the **impression **that they have some degree of influence over their daily lives, is the driving force behind all of this behavior.

Therefore, **seat **used by people.

Learn more about **seat **here:

https://brainly.com/question/19261993

#SPJ2

describe the components of soil

Soil contains air, water, and minerals as well as plant and animal matter, both living and dead. These soil components fall into two categories. ... Other, less common minerals include calcium, magnesium, and sulfur. The biotic and abiotic factors in the soil are what make up the soil's composition.

Facts about soil: Soil is a mixture of organic matter, minerals, gases, liquids, and organisms that together support life.

What does soil do to our earth: Advances in watershed, natural resource, and environmental sciences have shown that soil is the foundation of basic ecosystem function. Soil filters our water, provides essential nutrients to our forests and crops, and helps regulate the Earth's temperature as well as many of the important greenhouse gases.

Facts about soil: Soil is a mixture of organic matter, minerals, gases, liquids, and organisms that together support life.

What does soil do to our earth: Advances in watershed, natural resource, and environmental sciences have shown that soil is the foundation of basic ecosystem function. Soil filters our water, provides essential nutrients to our forests and crops, and helps regulate the Earth's temperature as well as many of the important greenhouse gases.

*Soil is a material composed of five ingredients — minerals, soil organic matter, living organisms, gas, and water. Soil minerals are divided into three size classes — clay, silt, and sand (Figure 1); the percentages of particles in these size classes is called soil texture.**Soil contains air, water, and minerals as well as plant and animal matter, both living and dead. These soil components fall into two categories. ... Other, less common minerals include calcium, magnesium, and sulfur. The biotic and abiotic factors in the soil are what make up the soil's composition.*

What process primes a molecule to change in a way that increases its activity, produces motion, or does work

**Answer:**

cellular respiration.

explanation: cellular respiration, the process by which organisms combine oxygen with foodstuff molecules, diverting the chemical energy in these substances into life-sustaining activities and discarding, as waste products, carbon dioxide and water.

pls help it's due today

**Answer:**

Breh seriously. Ugh fine.

1.B

2.D

3.C

4.C

5.D,A and B

6.A,C and D

A wave traveling at 230 m/sec has a wavelength of 2.1 meters. What is the frequency of this wave?

**Answer:**

**Explanation:**

The frequency of the wave when given it's velocity and wavelength only can be found by using the formula

[tex]f = \frac{c}{ \lambda} \\ [/tex]

where

c is the velocity of the wave in m/s

[tex] \lambda[/tex] is the wavelength in meters

From the question we have

c = 230 m/s

[tex] \lambda[/tex] = 2.1 m

[tex]f = \frac{230}{2.1} = 109.523809... \\ [/tex]

We have the final answer as

109.52 HzHope this helps you

If you have a train traveling 750 m in 63

seconds how fast is the train travelling?

**Answer:**

**The train would be moving 47,250 mph **

Explain how energy changes in the spring toy below when it goes downstairs.

Given what we know, we can confirm that the **spring toy **uses the transfer of **potential gravitational **energy into **kinetic energy **of motion in order to fall down the **stairs**.

Therefore, we can confirm that the **spring toy **uses its position at the top of each stair as a source of **potential energy**, which using the **momentum **from the last fall, it transfers into the **kinetic energy **of motion as it falls, all through the help of **gravity**.

To learn more about **energy **visit:

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What is the work done in lifting 60 kg of blocks to a height of 20m

Answer:

The answer is 1200

Explanation:

The region of the globe directly beneath the Sun is warmer because it ____. A. sees more intense wavelengths reaching the surface B. is closer to the Sun C. has more yearly daylight than other parts of Earth D. receives direct sunlight

The answer is A. Sees more intense wavelengths reaching the surface

Which of the following is a completely elastic collision?

A. a ball rebounds against a wall, reversing its direction, but at only half the speed.

B. Two balls collide, stick to each other, and move together after the collision.

C. Two balls collide and move at a right angle to each other after the collision at a reduced speed.

D. Two balls collide head on, each reversing its direction and traveling at half the speed.

E. A ball with velocity v collides with a ball at rest; after the collision the first ball is at rest and the second ball has velocity v.

I will mark brainliest

Hi there!

**Answer E. **

For a collision to be completely elastic, there must be NO LOSS in kinetic energy.

We can go through each answer choice:

A. Since the ball rebounds at half the initial speed, there is a loss in kinetic energy. This is NOT an elastic collision.

B. A collision involving sticking is an example of a perfectly INELASTIC collision. This is NOT an elastic collision.

C. A reduced speed indicates that there is a loss of kinetic energy. This is NOT elastic.

D. The balls traveling at half the speed after the collision indicates a loss of kinetic energy, making this collision NOT elastic.

E. This collision indicates an exchange of velocities, characteristic of an elastic collision. We can prove this:

Let:

m = mass of each ball

v = velocity

We have the initial kinetic energy as:

[tex]KE = \frac{1}{2}mv^2 + 0 = \frac{1}{2}mv^2[/tex]

And the final as:

[tex]KE = 0 + \frac{1}{2}mv^2 = \frac{1}{2}mv^2[/tex]

*Thus, Kinetic energy is CONSERVED. This collision is ELASTIC.*

A vertical spring stretches 9.6 cm when a 1.3 kg block is hung from its end. (a) Calculate the spring constant. This block is then displaced an additional 5.0 cm downward and released from rest. Find the (b) period, (c) freque

**Answer:**

F = - K x

a) K = 1.3 kg * 9.8 m/s^2 / .096 m = 133 kg/sec^2

b) ω = (K/m)^1/2 angular frequency of SHM

ω = (133 / 1.3)^1/2 = 10.1 / sec

f = 2 π ω = 6.28 * 10.1 / sec = 63.5 / sec

P = 1/f = .0157 sec

A crane does 9,500 J of work to lift a crate straight up using a force of 125 N. How high does the crane lift the crate? 0. 013 m 76 m 9,400 m 1,200,000 m.

The **distance covered **as the** crane does work** is** 76 m**.

Recall that the **work done** in lifting the crane is the product of **force and distance covered. **In this case, we are talking about the distance through which the crane is raised. Therefore;

Work done = Fs

F = **Force **applied

s = **Distance **covered

**Substituting **values;

Work done/Force applied = Distance covered

Distance covered = 9,500 J/125 N

Distance covered = **76 m**

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A 50.0 kg crate is pulled 375 N of force applied to a rope. The crate slides without friction.

After being pulled 3.07 meters the crate has a velocity of 5.61 m/s. What is the angle (degrees) made by the rope with the horizontal?

Hi there!

We can use the work-energy theorem to solve.

Recall that:

[tex]\large\boxed{W = \Delta KE = \frac{1}{2}mv_f^2 - \frac{1}{2}mv_i^2}[/tex]

The initial kinetic energy is 0 J because the crate begins from rest, so we can plug in the given values for mass and final velocity:

[tex]W = \frac{1}{2}(50)(5.61^2) = 786.8025 J[/tex]

Now, we can define work:

[tex]\large\boxed{W = Fdcos\theta}}[/tex]

Now, plug in the values:

[tex]786.8025 = Fdcos\theta\\\\786.8025 = (375)(3.07)cos\theta[/tex]

Solve for theta:

[tex]cos\theta = .6834\\\theta = cos^{-1}(.6834) = \boxed{46.887^o}[/tex]

What is the minimum number of overload units such as heaters, trip coils, or thermal cutouts allowed for a three-phase AC motor's protection

The **minimum number** of overload units for a **three-phase** AC **motor's **protection is THREE (3). It is a **polyphase **motor.

**Three-phase motors** are **polyphase **motors, which can be **induction **motors or **synchronous **motors.

A **three-phase motor **is organized to run on three-phase **alternating current **(AC) electrical power, which is required for diverse industrial devices that use a lot of electrical energy.

These motors (**three-phase motor**) are composed of a **stator **(the outer part), a **rotor **(rotating part), and the **enclosure **(the external skeleton).

Learn more about three-phase motors here:

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Which particles within the atom are electricity charged?

a. Electrons only.

b. Neutrons only.

c. Protons only.

d. Electrons and protons.

e. Protons and neurons.

**Answer:**

I think b sorry if wrong

**Explanation:**

it b sorry if wrong

**Answer:**

**Given that these particles make up atoms, they are often referred to as subatomic particles. There are three subatomic particles: protons, neutrons and electrons. Two of the subatomic particles have electrical charges: protons have a positive charge while electrons have a negative charge:**

Carlos wanted to know how positive and

negative charges affect balloons. The

balloons shown below are part of his

investigation.

**Answer:**

it Give only one of them a positive or negative charge

**Answer:**

Rubbing the balloon against hair or wool causes electrons to move from the hair or wool to the balloon. The balloon's negative charges are attracted to the positive charges in the can, and so the can rolls toward the balloon.

When you take a hot shower, theashower curtain sometimes movesinto the shower towards you. Whydoes this happen?
what is the direct object in the sentence Aaron painted his house white.
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