awnser these pls they r for middle schoolers lol

Answer:

try this answer out and let see

Answer: inertia

i don't know just want points .-.

sorry

Answer:

a)    F = 2000 N , B)   x = 25 m

Explanation:

a) To solve this exercise we can use the relationship between work and kinetic energy

          W = ΔK

The job is

           W = -F x

the negative sign is because the force of the brakes is contrary to the movement

as the car stops its final kinetic energy is zero

           K = ½ m v²

let's substitute

         - F x = 0 - ½ m v²

            F = ½ m v² / x

Let's reduce the magnitudes to the SI system

           v = 72 km / h (1000m / 1km) (1 h / 3600 s) = 20 m / s

let's calculate

          F = ½ 1000 20²/100

          F = 2000 N

b) x = ½ mv2 / F

let's slow down to the SI system

         v = 36 km / h = 10 m / s

let's calculate

             x = ½ 1000 10²/2000

             x = 25 m

Answer:

What are you asking

Explanation:

Answer:

What are you asking write I don't understand

Answer:

Heat capacity, Q = 2090 Joules.

Explanation:

Given the following data;

Mass = 100 grams

Specific heat capacity = 4.18 J/g°C.

Temperature = 5°C

To find the quantity of heat required;

Heat capacity is given by the formula;

[tex] Q = mct[/tex]

Where;

Q represents the heat capacity or quantity of heat.

m represents the mass of an object.

c represents the specific heat capacity of water.

t represents the temperature of an object.

Substituting into the formula, we have;

[tex] Q = 100*4.18*5 [/tex]

Heat capacity, Q = 2090 Joules.

Answer:

120 mph is 193.1 km/hrs.

distance is s = vt.

193.1*3.5 = 675.85 km

Answer:

420 miles

Explanation:

Time: 3.5 hrs

Velocity: 120 miles/hr

Now Distance=  Speed × Time  

Distance = 3.5 × 120 = 420 miles

Answer:

An object in motion will remain in motion until it experiences an unbalanced force.

Explanation:

This is part of Newton's first law. An unbalanced force is there to offset the object in motion, such as a ball versus a wall. A wall will stop the ball from moving.

Answer:

A) 35 ft

B) 5 ft

C) Net displacement = distance covered by the dog to retrieve the stick - distance covered before the dog starts chewing the stick

Explanation:

A) Total distance covered by the dog = 20 + 15

                                  = 35 ft

B) Since the other distance covered by the dog before chewing the stick, after the retrieval, was in an opposite direction to the initial direction, then;

total displacement of the dog = 20 - 15

                                  = 5 ft

C) Net displacement = distance covered by the dog to retrieve the stick + distance covered before the dog starts chewing the stick

But, displacement involves a specified direction. The distance covered before the dog starts chewing the stick was in an opposite direction to the initial direction.

Thus,

Net displacement = distance covered by the dog to retrieve the stick - distance covered before the dog starts chewing the stick

Answer:

Q= -6900 J

Explanation:

use the formula Q=mC(T_2 - T_1) and sub in givens

Q=mC(T_2 - T_1)

Q= (200 g)(0.444 J/g°C)(22-100)

Q= -6900 J

The negative sign means heat is lost, which agrees with the decrease in temperature

Answer:

Answer:

B

Explanation:

Density=mass/volume

Density=8.5g/17mL

Density=0.5 g/mL

An object has a mass of 8.5 g and a volume of 17 mL, then the density will be 0.5 g/mL. The correct option is b.

The density of matter is a physical quantity that indicates how much mass is contained within a particular volume.

It is defined as a substance's mass per unit volume. In other words, density quantifies how tightly packed a substance's particles are.

We know that:

Density = Mass / Volume

Density = 8.5 g / 17 mL

Simplifying the calculation:

Density = 0.5 g/mL

Therefore, the density of the object is 0.5 g/mL. So, the correct answer is option b. 0.5 g/mL.

For more details regarding density, visit:

https://brainly.com/question/29775886

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Answer:

Laterite is your correct answer

Explanation:

Well i took the quiz and made a %100 meaning i am correct.

The laterite soil is found in warm, humid climates

A variety of rocks weathered under highly oxidising and leaching circumstances to form laterite soil, which is present in the soil layer and is rich in iron oxide.

Given data ,

Let the soil be represented as A

Now , the soil is found in warm, humid climates

The laterite soil is is rich in iron and aluminium, are assumed to have developed in hot, humid tropical climes. Because to the substantial concentration of iron oxide, nearly all laterites have a rusty-red colour.

They develop as a result of prolonged, intensive erosion of the underlying rock material, which most frequently takes place during periods of high temperatures and heavy precipitation that alternate with periods of dry weather.

Hence , Laterite is the type of soil is found in warm, humid climates.

To learn more about laterite soils click :

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Answer:

Explanation:

When vinegar and baking soda are first mixed together, hydrogen ions in the vinegar react with the sodium and bicarbonate ions in the baking soda. The result of this initial reaction is two new chemicals: carbonic acid and sodium acetate. The second reaction is a decomposition reaction.

Answer:

10

Explanation:

Amu denotes for unified atomic mass.

it is mostly used to define the atom's mass and molecules.

we know that

One unit of amu is 1 ÷ 12 of the mass of a nuclide 12C

And 1 u = 1.660 538 921 × 10-27 kg

In the inside we can found that there is 10 nucleons so here the alss of the atoms would be 10 amu  

Answer:

guy above me is right

Explanation:

Answer: C

Explanation: I did the test

We need to use 6 red circles and 8 blue circles to represent the 6 protons and 8 neutrons in the nucleus. Then, we need to place 6 yellow circles around the nucleus to represent the 6 electrons in the atom. Option C is correct.

To create a correct model of a Carbon-14 atom, we need to follow the steps that represent the correct number of protons, neutrons, and electrons in a carbon-14 atom.

Carbon-14 has 6 protons and 8 neutrons, so we need to use a total of 6 red and 8 blue circles in the nucleus. It also has 6 electrons, so we need to place 6 yellow circles around the nucleus.

The correct steps to follow to create a model of a Carbon-14 atom are:

B. steps 1, 4, 6

Step 1:  Use 6 red circles for the nucleus of the atom

Step 4: Add 8 blue circles to the nucleus of the atom

Step 6:  Place 6 yellow circles around the nucleus of the atom

Therefore, we need to use 6 red circles and 8 blue circles to represent the 6 protons and 8 neutrons in the nucleus. Then, we need to place 6 yellow circles around the nucleus to represent the 6 electrons in the atom.

Learn more about Carbon-14 atom here:

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Answer:

500 N

Explanation:

Since the work done on the spring W = Fx where F = force applied and x = compression length = 0.170 m (since the spring will be compressed its full length when the force is applied)

Since W = 85.0 J and we need to find F,

F = W/x

= 85.0 J/0.170 m

= 500 N

So, the  magnitude of force must you apply to hold the platform stationary at the final distance given above is 500 N.

If one of the masses is tripled, then their product is tripled, and the force between them is tripled.  The new force is 750N .

Answer:

[tex]40^{\circ}[/tex]

Explanation:

The incident angle is [tex]20^{\circ}[/tex] so the reflected ray will also be [tex]20^{\circ}[/tex].

The normal divides the angle between the incident and reflected ray. So, the angle between them would be

[tex]\text{Incident angle}+\text{Reflected angle}=20+20=40^{\circ}[/tex]

So, the angle between the incident and reflected rays is [tex]40^{\circ}[/tex].

Answer:

v_kyle = 0.5 m/s

v_jennies = 0.333 m/s

Kyle's Rabbit was the fastest

Explanation:

For the velocity of Kyle's Rabbit:

d = distance covered = 40 m

t = time taken = (1 min)(60s/1 min) + 20 s = 80 s

[tex]v_{kyle} = \frac{d}{t} = \frac{40\ m}{80\ s}[/tex]

v_kyle = 0.5 m/s

For the velocity of Jennies Rabbit:

d = distance covered = 30 m

t = time taken = (1 min)(60s/1 min) + 30 s = 90 s

[tex]v_{jennies} = \frac{d}{t} = \frac{30\ m}{90\ s}[/tex]

v_jennies = 0.333 m/s

It is clear from the results that:

Kyle's Rabbit was the fastest

Answer:

Gravity acts to push the object sideways

Explanation:

projectile motion is a motion that moves along a curved path under the action of gravity only. Hope this helps!

Answer:

Atomic models are important because, they help us visualize the interior of atoms and molecules, and thereby predicting properties of matter.

Explanation:

We study the various atomic models in our course of study because, it is important for us to know, how did people come to the present concept of an atom. How did physics evolve from classical to quantum physics.

All these are important for us to know and thus, knowledge about various atomic models, their discoveries and drawbacks and finally improvements based on scientific evidence present at that time is important for us to understand the underlying theory very well.

Answer:

Most energy drinks contain large amounts of caffeine, which can provide a temporary energy boost. Some energy drinks contain sugar and other substances. The boost is short-lived, however, and may be accompanied by other problems.

Explanation:

Answer:

kinda

Explanation:

Most energy drinks contain large amounts of caffeine, which can provide a temporary energy boost. Some energy drinks contain sugar and other substances. The boost is short-lived, however, and may be accompanied by other problems.

Answer:

A: The mass would be 250kg

Explanation:

In terms of an equation, the momentum of an object is equal to the mass of the object times the velocity of the object. where m is the mass and v is the velocity. The equation illustrates that momentum is directly proportional to an object's mass and directly proportional to the object's velocity.

p= mv

m= p/ v

The explanation to that is:

momentum = mass× velocity

mass= momentum / velocity

THE ANSWER IS A

Hope this helps!

Answer:

Im going to say voltage. It matches with my notes but it says voltage difference so i hope this helps!

Explanation:

Answer:

the pressure exerted at the base of the container is 490 N/m²

Explanation:

Given;

density of water, ρ = 1,000 kg/m³

base of the rectangular container, = 50 cm by 30 cm

height of water in the tank, h = 5 cm = 0.05 m

The pressure exerted at the base of the container is calculated as;

P = ρgh

where;

g is acceleration due to gravity = 9.8 m/s²

P = 1000 x 9.8 x 0.05

P = 490 N/m²

Therefore, the pressure exerted at the base of the container is 490 N/m²

Answer:

stress and fault

Explanation:

yes

Answer:

Stress for the first one and the second faults

Explanation:

Answer:

Wave Speed (m/s)

31.25

Summary

Wavelength (m)6.25

Frequency (hz)5

Explanation:

https://calculator.academy/wave-speed-calculator/#f1p1