Which of the following statements is TRUE concerning forces?
A. Forces in the same direction are added together
B. Forces in the opposite direction are subtracted from one another
C. An overall net force must be present in order for movement to occur
D. All of the above

Answers

Answer 1
The answer is d I took the test

Related Questions

I need help please i really do appreciate it

Answers

Answer:Substances

Explanation:

At 1:00 a.m., someone breaks a window in the back of a store and robs the safe. On the way out, the thief is cut on a piece of broken glass. A forensic team collects and tests a sample of blood left behind by the thief. It is O–. The police bring in a suspect with a cut forearm who was arrested just three blocks from the store. The person resembles someone seen leaving the store at the time of the robbery. A sample of the suspect’s blood is taken and tested for blood type. Once the suspect’s blood is mixed with anti-A serum, it is immediately clear that the suspect is not the person who was cut on the broken glass in the store. How did the test indicate that fact?

Answers

Answer:dd

Explanation:

A person trapped outside during a thunderstorm should

Answers

Answer:

should stay away from trees, water, and tall objects.

Answer: the answer is

stay away from trees, water, and tall objects.:)

Explanation:

Which change of state takes place when a gas loses energy?
A. condensation
B. evaporation
C. molting
D. solidification

Answers

Answer:

Condensation (((((((((((((

the answer is A, condensation.

A sample of gas in a syringe releases heat to its surroundings while the
plunger is pulled out. What are the correct signs of heat and work for this
change?
A. +Q+W
B. --W
O C. +Q, -W
D. -Q. +W

Answers

Answer: b

Explanation:

When heat is released by the system i.e. system loses heat. So, we take it as negative -Q

When the work is done on the system then it is considered as negative work on the system i.e. -W  

In this case, the plunger is pulled out, and work is done on the system. So, we take work as negative work -W

Correct option is b

The answer is D.

-Q +W

A 0.016-kg piece of iron absorbs 1086.75 joules of heat energy, and its temperature changes from 25°C to 175°C. Calculate the specific heat capacity of iron. Equation : c = Q/mt * 2608.2 J/(Kg*°C) 3477.6 J/(Kg*°C) 452.8 J/(Kg*°C) 8.7 J/(Kg*°C)

Answers

Answer:

452.8125J/Kg°C

Explanation:

The quantity of eat absorbed by the iron is expressed as;

Q = mc∆t

Q = 1086.75 joules

m is the mass= 0.016kg

c is the specific heat capacity

∆t is the change in temperature = 175-25 = 150°C

Get c;

From the formula;

c = Q/m∆t

c = 1086.75/0.016(150)

c =1086.75/2.4

c = 452.8125J/Kg°C

Hence the specific heat capacity of iron is 452.8125J/Kg°C

Which statement about plant and animal cells is true?
A. Both have a cell wall to give them support.
B. Both have a large vacuole to store water.
C. Both use mitochondria to release energy.
D. Both use chloroplasts to store energy.

Answers

Answer:

C. Both use mitochondria to release energy

Explanation:

Plant cells have a cell wall, a large vacuole and chloroplasts but animal cells do not.

A combination of the skill-related fitness components can determine one's
Please select the best answer from the choices provided.
True or false

Answers

It is an absolutely correct statement that a combination of the skill related fitness components can determine one's performance in a specific sport.

2. Arrange the following types of electromagnetic waves in order by wavelength, from longest to
shortest: Gamma rays, visible light, infrared radiation, ultraviolet radiation, microwaves, radio
waves, X-rays

Answers

Answer:

Radiowaves >  microwaves> Infrared radiation > visible light > Ultraviolet radiation > x -rays > gamma rays

Explanation:

To solve this problem, we use the electromagnetic spectrum as a reference. On the electromagnetic spectrum, the lesser the wavelength, the higher the frequency and more energetic a wave is.

 Therefore;

  Radiowaves >  microwaves> Infrared radiation > visible light > Ultraviolet radiation > x -rays > gamma rays

So, radiowaves have the longest wavelength and gamma rays have the shortest.

Answer:

Radio, microwave, infrared radiation, visible light, ultraviolet radiation, x-rays and gamma rays.

Explanation:

These electromagnetic waves are arranged from longest to shortest wavelengths.

Have an amazing day!

Which sphere includes rocks and minerals?
A.
atmosphere
B.
biosphere
C.
geosphere
D.
hydrosphere

Answers

Answer:

Geosphere

Explanation:

Answer:

The geosphere may be taken as the collective name for the lithosphere, the hydrosphere, the cryosphere, and the atmosphere.

The lithosphere refers to the land. Land consists of rocks and sand.

Explanation:

An object, 5 cm high, is placed on the principal axis of a diverging lens of focal length 20 cm. The object is 30 cm from the lens.

Use a scaled diagram to locate the image formed by the lens.

Answers

Answer:

The answer is 70 cm

Explanation:

If you add All the numbers together, you receive an 55 cm then you add 15 because the points on the diagram also count.

A squirrel runs at a speed of 9.9 m, with 25 J of kinetic energy. What is the squirrel’s mass?

Answers

Answer:

The mass of the squirrel is 0.51kg

A squirrel runs at a speed of 9.9 m/s with 25 J of kinetic energy.

What is the squirrel’s mass?

Answer: 0.51 kg

6th grade science!!!!!!!!!!​

Answers

Answer:

D. All of the above

Explanation:

Global warming may cause all of the given choices.

Global warming is the rise in surface temperature. This is due to the trapping of heat within the earth surface.

It is as a result of huge amount of greenhouse gases within our atmosphere. They typically permit short wave radiations to escape and they do not allow short wave radiation to pass through. This in turn produces heat.

The heat can melt polar ices and glaciers. This in turn will cause sea levels to rise. Also, the ocean temperature will generally increase due to this.

Which of the following is BOTH an isotope and ion of Chlorine? plz help
a
B
c
D

Answers

Answer:

The answer is C.

Explanation:

because if you look ay the nutrons you can see that it adds to the protons

Answer:

C

Explanation:

Isotopes of Chlorine (Cl) gain an electron when they form ionic bonds. This results in a negative ion (the Chloride ion). ... When the charge on an atom is zero it means the number of protons is equal to the number of electrons. The atom is said to be neutral and there will not be a + or - written after the element symbol.

How many Joules of energy are required to make 50 kg of ice completely melt?
Hv = 226,000 J/kg
Hf = 334,000 J/kg

Answers

Answer:

In order to answer this question, you need the enthalpy of fusion of ice, which is 333.55 J/g (Joules/gram). The enthalpy of fusion is the amount of heat that must be absorbed or lost in order to change physical state.

The number of Joules required to melt the ice = enthalpy of fusion of ice x mass of ice.

1 kg = 1000g

40kg x (1000g/1kg) = 40,000g

Joules needed to melt the ice = 333.55 J/g x 40000 g = 13342000 J or

1.3342 x 107 J

Explanation:

Instead of 40kg input 50kg and get the answer

a physical quantity is defined as mass per uint volume .what is its si unit.​

Answers

a physical quantity is defined as mass per uint volume .what is its si unit.


A physical quantity is a property of a material or system that can be quantified by measurement. A physical quantity can be expressed as the combination of a numerical value and a unit. For example, the physical quantity mass can be quantified as n kg, where n is the numerical value and kg is the unit. A physical quantity possesses at least two characteristics in common, one is numerical magnitude and other is the unit in which it is measured.

which statement best describes the impact of space program on Florida

Answers

Answer:

B

Explanation:

did the test and i dont know the answer lol good luck bud gg

Henry designs an experiment to find out why plants without flowers tend to be wind-pollinated and not animal-pollinated. He takes samples from a variety of plants and studies them in the field. He finds that the evidence supports his hypothesis. Which of these was the hypothesis Henry was testing? Choose the correct answer. Nonflowering plants make less pollen than flowering plants. Nonflowering plants lack the structures to attract animal pollinators. Nonflowering plants grow close to the ground and capture fewer pollinators. Nonflowering plants grow close to the ground because they have no pollen grains.

Answers

Answer:

option 2

Explanation:

you are very welcom

Help for brainlist easy science plz

Answers

Answer:

the pics upside down fam

Explanation:

Answer:Darling, your worksheet is upside down.  

If a 1.3 kg ball is dropped from the top of a 33.7 meter building what is its potential energy before it is dropped?
B) What is the maximum velocity of the ball in problem 1 just before it hits the ground?
C) How much kinetic energy does the ball in problem 1 have after it has fallen 10 m down the building?

Answers

Answer:429.338 J; 25.7 m/s; 127.4 J

Explanation:

Given

mass of ball m=1.3 kg

Height of building H=33.7 m

(a)Potential Energy before dropping [tex]=mgH=1.3\times 9.8\times 33.7=429.338\ J[/tex]

(b)Velocity Just before hitting the ground

[tex]v=\sqrt{2gH}=\sqrt{2\times 9.8\times 33.7}=25.7\ m/s[/tex]

(c)After falling 10 m

Here initial velocity is zero

using [tex]v^2-u^2=2as[/tex]

Here,

[tex]v=\text{final veloity}[/tex]

[tex]u=\text{Initial velocity}[/tex]

[tex]a=\text{acceleration due to gravity}[/tex]

[tex]s=\text{displacement}[/tex]

Putting values

[tex]v^2-0=2\times 9.8\times 10\\v=14\ m/s[/tex]

So, kinetic energy  [tex]\dfrac{mv^2}{2}=\dfrac{1.3\times 196}{2}=127.4\ J[/tex]

What is a heating curve of water?

Answers

Answer:

eye

Explanation:

I hope this helps you out

Which are examples of a Simple machine?
Question 4 options:


Hammer that swings on a nail


Light Switch that flips


Door stop that wedges at the bottom


The wheels on a bike

Answers

Wheels on a bike
Hope this helps

Answer:

the wheels on a bike

Explanation:

do you go to k-12 if you do can you help me please have a good night/day :) ❤

hockey puck slides across the ice with an initial velocity of 7.2 m/s. It has a deceleration of 1.1 m/s2 and is traveling toward the goal 5.0 m away. How much time does the goalie have to stop the puck?

Answers

For this use the formula:

d = Vo * t - (at^2) / 2

Clearing t:

t = d/(v + 0.5*a)

Replacing:

t = 5 m / (7.2 m/s + 0.5 * (-1.1 m/s²)

Resolving:

t = 5 m / (7.2 m/s + (-0.55 m/s²)

t = 5 m / 6.65 m/s

t = 0.75 s

Result:

The time will be 0.75 seconds.

.75 seconds is the amount of time the goalie has to stop the puck

Two resistors are used in an experiment. Resistor 1 had a resistance of 4 ohms and resistor 2 has a resistance of 2 ohms. Which resistor will have the bigger current flowing through it if the potential difference is constant

Answers

Answer:

2ohms resistor

Explanation:

According to ohms law

V= IR

V is the potential difference

I is the current

R is the resistance

Since they have the same potential difference, this shows that they are connected in parallel

Let assume V = 20V

For the 4ohms resistor

I = V/R

I = 20/4

I = 5A

For the two ohms resistor

I = V/R

I = 20/2

I = 10A

This shows that the 2ohms resistor will have the bigger current because the smaller the load, the bigger the current and vice versa

Answer:

2

Explanation:

Please help ASAP please ASAP

Answers

The answer to your question is 185

How much potassium nitrate (KNO3) would dissolve in 50 milliliters of water at 45ºC given that 55g of KNO3 is dissolved in 150mL of water at 45°C.

A. 19.7g
B. 15.1g
C. 18.3g
D. 23.3g

Answers

The answer is C. 18.3g

3) What is the name of the group of elements that are a good conductor of heat?
Metals
Metalloids
Nonmetals
Noble gases

Answers

Answer:

Metals

plz mark as brainliest

What is the main power and purpose of the legislative branch?
i always need help with physics

Answers

Answer:

House and Senate.

Explanation:

declares war, regulates interstate and foreign commerce and controls taxing and spending policies.

Science; 4."Energy cannot be created or destroyed". Explain what this means and give an example to explain your
reasoning.

Answers

Answer:

matter

Explanation:

An equilateral triangle is a triangle with all three sides of equal length. All of the angles in an equilateral triangle are equal.

What is the measure of angle θ in the triangle shown?(Figure 1) Recall that the sum of the angles in a triangle equals 180∘.

Answers

Answer:

60

Explanation:

it's equilateral...all angles are equal...180÷3=60ffs

Each angle of triangle is 60 degree.

What is equilateral triangle ?

If a Triangle having all the three sides of equal length and corresponding angle also to be equal than this triangle is known as equilateral triangle.

By definition of equilateral triangle it is known that all the sides of a triangle are equal and by the angle sum property tells us that a triangle's angles add up to 180. It also tells us that every side of a triangle is the same, and every angle of an equilateral triangle is the same.

Let each angle of triangle be x :

[tex]\begin{aligned} x+x+x&= 180^{o}\\3x&=180^{0}\\x&=60^{o}\end{aligned}[/tex]

Therefore, each angle of triangle is 60 degree.

check and know more about triangle here :

https://brainly.com/question/2773823

#SPJ2

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