Answer:1.16
2.unbalanced
Explanation:
Answer:
What is the net force on them?
⇒ 16 N
Is this force balanced or unbalanced?
⇒ unbalanced
Will the dog move forward, backward, or remain stationary?
⇒ forward
Explanation:
did it :)
All I need help on, is the first one on the top row. Thanks :))
Answer:
1a)40-27=13
1b) heat
1c)efficiency = W out/W in
so 27/40= 67%
pressure exerted on a surface depends on________
(a) force and pressure
(b) density and area
(c) height and density
(d)Area and density of liquid
Answer:
(a) Force and Pressure
Explanation:
Acc to the formula,
Force = Pressure/Area
Therefore it depends on force and pressure
There are two tall slides at the newly opened theme park, a blue slide and a red slide. The slides have such a height that, if it weren't for friction and air resistance, riders would travel twice as fast at the bottom of the blue slide as they do at the bottom of the red slide. If the red slide is 8m tall, how tall is the blue slide?
Answer:
32 m
Explanation:
By energy conservation, total energy at the top of slide must be equal to the total energy at at the bottom.
therefore
mgh = (1/2)mv^2
v^2= 2gh
[tex]v = \sqrt(2gh)[/tex] ..............(1) i.e., velocity is a function of height of slide.
1st part
Let height of blue slide be H and height of red slide be h.
Let velocity of rider in blue slide= V and red slide= v
At the bottom of slide,
From equation (1)
therefore
[tex]\frac{V^{2}}{v^{2}} = \frac{2gH}{2gh}[/tex]
Given, V= 2v
[tex]\therefore \frac{4v^{2}}{v^2{}} = \frac{H}{h}[/tex]
H = 4h
therefore, height of blue slide is 4 times that of red slide= 4*8=32 m
Speed – time graph of uniform motion is horizontal straight line.
Select one:
a. TRUE
b. FALSE
consequences and application of heat
Answer:
Prolonged exposure to extreme heat can cause heat exhaustion, heat cramps, heat stroke, and death, as well as exacerbate preexisting chronic conditions, such as various respiratory, cerebral, and cardiovascular diseases.
answer please in comment what i am typing
Answer:
Hiiiiiiii........where r u frm??
Which type of electromagnetic waves would the best to use in an object designed to cook food?
А. gamma waves
B. visible waves
C. infrared waves
D. microwaves
Answer:
C. infrared waves
Explanation:
Microwaves are the electromagnetic waves which would the best to use in an object designed to cook food. Thus, the correct option is D.
What are Microwaves?Microwave is a form of electromagnetic radiation with the wavelengths ranging from about one meter to about one millimeter which is corresponding to the frequencies in the range between 300 MHz and 300 GHz, respectively.
Microwaves are used for cooking food faster than the conventional ovens and would not make a mess in the process. This reheats food instantly quickly. It is helpful for the health conscious people. Microwaves also ensure that a person will never burn the food again. Microwaves are also very economical and energy efficient.
Therefore, the correct option is D.
Learn more about Microwaves here:
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A ray diagram is shown.
Answer:
Angle of Refraction ?
Explanation:
My decided answer on this question
Which type of mirror would you use to cook a hot dog and why?
at terminal velocity what will be relationship between drag force and driving force
Answer:
The answer to this question is given below in this explanation section.
Explanation:
"relationship between drag force and driving force"
The velocity at any time during the flight depends on the corresponding acceleration of the vehicle and the balance of forces acting of the vehicle.Forces acceleration and velocity are all vector quantities having both a magnitude and a direction.When describing the motion of an object caused by forces,one must account for both the magnitude and direction.The forces present during coasting flights are the drag and the weight.The weight is constant is magnitude and is always directed toward the center of earth.The magnitude of the drag change the square of the velocity.During ascent the drag is in the same direction as the weight .But during descent the drag opposes the weight.
For the descending rocket the next vertical external force F is equal to the difference between the drag D and the weight W:
F=D-W
The impetus power or energy behind something in motion,as in he was clearly the driving force in the new administration This term transfer the force that sets in motion an engine or vehicle to other enterprises.Gravity is the driving force for an object falling towards the ground.
A skate boarder relies on the ground pushing on the sole of her shoe to drive her skateboard along.
2 Which of the following effectively summarizes paragraph 2?
A The orientation in space, relative to the Sun, is the cause
of Earth's seasonal changes.
1
B There is an imaginary pole running through the center of
Earth from the North Pole to the South Pole, which is called
an axis.
C We also learned that Earth's axis is tilted 23.5
degrees from the perpendicular of the plane of the
ecliptic.
D The northern hemisphere has more daylight hours.
Answer:B
Explanation:
The statement that summarizes the paragraph is northern hemisphere has more daylight hours.
What is Earth?The Earth is part of the nine planet and it comprises of the equator, northern and southern hemisphere.
It is the most suitable place for living because it have water,oxygen and other gases that support life.
Therefore, The statement that summarizes the paragraph is northern hemisphere has more daylight hours.
Learn more about Earth below.
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is there any possibility to make 100% efficient system
Answer:
yes
Explanation:
its awesome
What is a type of light that the sun emits but a light bulb does not?
Gamma ray
X-ray
Ultra violet (UV)
Visible
Infrared (IR)
Microwave
Radio
Household lightbulbs don't emit radio, microwave, X-rays or gamma rays, and only a smidgen of ultraviolet.
The sun emits everything on the list.
The Sun emits many types of light , the ultraviolet, X-ray, and even gamma-ray, radio and infrared parts of the spectrum.
The light bulb emits very small amounts of UV light.
The Sun emits many types of light , the ultraviolet, X-ray, and even gamma-ray parts of the spectrum.But most of the Sun's light is in the infrared, visible, and ultraviolet parts of the electromagnetic spectrum.The Incandescent light bulbs, the most commonly used light bulbs in homes, give off small amounts of UV light. The UV light emitted by these bulbs is so small that it's impossible for human health to be affected in any way.Learn more:
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repeating anyone ineed answers plsss?
Answer:
the answer of question no5 is b
The person with the greatest ___ hits earth first
A. Volume
B. Mass
C. Density
D. Weight
The person with the greatest density will hit the earth first.
What is Density?This is regarded as the mass per unit volume of a substance.
Density = mass/ volume
In objects with different densities, the drag and buoyancy forces will be the
same. They will however have different gravitational force in which the
denser object has more compared to lighter ones.
Read more about Density here https://brainly.com/question/1354972
A solar cell that transforms 300 J of light energy into 45 J of electrical energy and 255 J of wasted energy. whats the efficiency
Answer:
15%
Explanation:
Step one:
Given data
Energy source= 300J
Useful energy = 45J
Waste energy = 255J
Required
The efficiency of the solar system
Step two:
The efficiency is computed by factoring only the useful work and the energy source
Efficiency= 45/300*100
Efficiency= 0.15*100
Efficiency= 15%
Solve for v
when
d = 10 and
t=5
Answer:
asfsdfasasfsda
Explanation:
Answer:
IDEK HOW TO SOLVE
Explanation:
Question 4
1 pts
What is the mass of a rock sitting on a 10 meters high cliff if it has a potential energy of 500
joules?
50 kg
10 kg
5 kg
1000 kg
Answer:
it's answer is 5 kg
hope it helps youAnswer:
5kg is your answer
I hope it helps mate
I will always help you understanding your assingments
have a great day
I am bored
#Captainpower:)
What is radioactive dating? How is it used to determine age of something?
answer 2 question basically please Help!!!
Answer:
Technique of comparing abundance ratio between radioactive isotopes to a reference isotope to determine the age of a material called radioactive dating. It determines the age by having a more abundance of isotopes in the cellular being.
a ball is thrown vertically upwards from the ground. The ball rises and falls back to the ground. Describe the changes in the mechanical energy of the ball as it rises.
Answer:
as the ball is thrown, the enegry rises up, when it falls, the ball relseases all energy
Explanation:
why water molecules are closer together in the liquid state than in the solid state.
Answer:
because of the hydrogen bonds, as water molecules come together they stick to one another for a small, but significant amount of time. This slows them down, and holds them closer to one another. They become a liquid; a different state of matter where the molecules are closer and slower than in a gas.
Answer:
When water is in its solid-state, the water molecules are packed close together preventing it from changing shape.
Explanation:
In general, when considering the states of matter, solids are denser than liquids, and normally liquids are denser than gases.
Hope this helps!
Brain-List?
You can use the curved part of a spoon as a mirror because it
light.
Which best completes the statement?
O reflects
O refracts
O absorbs
O enhances
Answer:
the correct answer is actually refelcts
Explanation:
What is the momentum of a 120 pound bicyclist that is traveling at 25 mph?
How do you score a goal in team handball ?
Answer:a goal is scored by throwing the ball into the goal post and is confirmed by deciding that’s if the ball has hit the tape mark or not
Explanation:
Which of the following statements best describes the relationship between the environment and the collective health of the world? A. The environment does not affect our health. B. When the environment is damaged, our health improves. C. What is good for the environment is good for our health. D. Our collective health is not related to the health of the environment. Please select the best answer from the choices provided. A B C D Mark this and return
Answer:
its C
Explanation:
The statement that describes the relationship between the environment and the collective health of the world is; "what is good for the environment is good for our health."
Humans must maintain a very good interaction with their environment because the interaction between man and his environment is very necessary for healthy living.
Man depends on water, air etc to sustain life. These are part of the natural environment, when these are polluted due to neglect of the environment, human health is adversely affected.
Learn more: https://brainly.com/question/4593618
Visible light is the _______ that our eyes can see.
Answer:
Spectrum because it could respond to a specific color based upon how you humans typically perceive Lights of the wavelength
Answer:
spectrum
Explanation:
Which vector below goes from (0,0) to (-2,4)?
A. c
B. a
C. b
D. d
Answer:
I believe it is A.c
Explanation:
hope its right
Answer:
the correct answer is A with a line on top
Explanation:
I just did the quiz
A person walks 2.00 m east, then turns and goes 4.00 m west, then turns and goes back 1.00 m east.
Answer:
i got -1.00
Explanation:
Answer:
he is 1.0 west in the end.
Explanation:
think of it like a number line and you are starting on 0.
2.0m east is like 2 steps to the left (-2). Then you go back to the right (west) 4 steps (ending up at 2.0 meters). then you take one step back in the other direction where you are now at 1.0m on the right or west of 0.
Quick please I'll give you brainliest.
Answer:
its c
Explanation:
A seismic wave is energy released as the result of rock movement along a fault.
T/F
Answer:
TRUE
Explanation: