Answer:
Tension, Friction, normal force and gravitational force.
In air, a sound wave with a frequency of 200 Hz has a wavelength of about 1.5 meters. What is the wavelength of a wave if the frequency is increased to 600 Hz?
Answer:
see below
Explanation:
first of all, you find the speed of sound in air
which is
speed = frequency x wavelength
so
speed = 200 x 1.5
speed = 300 m/s
speed remains the same in the same medium
so you can use speed and frequency to find wavelength
speed = frequency x wavelength
300 = 600 x wavelength
wavelength = 0.5 m
hope this helps, please mark it brainliest
In Alaska, salmon feed on tiny plants called phytoplankton. During late summer, salmon gather in rivers to reproduce. Grizzly bears visit these rivers to feed on the large number of salmon. Phytoplankton are . Both the salmon and the grizzly bears are . Grizzly bears are .
Answer:
-->Phytoplankton are AUTOTROPHS
--> Both the Salmon and the grizzly bears are CONSUMERS.
--> Grizzly bears are SECONDARY CONSUMERS.
Explanation:
In an ecosystem, which is the basic functioning unit of nature, the biotic components is made up of all the living organisms in it. These organisms are divided into two main groups which includes:
--> The AUTOTROPHS: These are organisms that are able to use sunlight or chemical energy to manufacture their own food from simple inorganic substances. Since Autotrophs are the only organisms that can produce food in an ecosystem, they are also known as PRIMARY PRODUCERS. Example of autotrophs includes Phytoplankton( all green plants).
-->HETEROTROPHS: These organisms cannot manufacture their own food rather they feed on ready-made food which comes from the tissues of organisms in their environment. In an ecosystem, Heterotrophs are known as the CONSUMERS. Example of Heterotrophs includes all animals (salmon and the grizzly bears).
These biotic components of the ecosystem forms a feeding pathway through which energy and nutrients are transferred step by step among organisms. This is called a FOOD CHAIN. This feeding pathway follows a certain pattern:
--> it begins with a primary producer (Phytoplankton)
--> the primary producer is eaten by a primary consumer (salmon)
--> the primary consumer is eaten by a secondary consumer (grizzly bears)
That is the reason both the Salmon and the grizzly bears are CONSUMERS but while salmon is a primary consumer, grizzly bears are SECONDARY consumers.
Answer:
correct answer below
Explanation:
For a total of 8 hours, Mackenzie rode her motorcycle down a freeway at 60 kilometers per hour. There was a car behind her for one-quarter of that time. How far did Mackenzie ride while the car was behind her? Write the answer as a whole number.
In a hydraulic device, the surface area of the small piston is 1 cm2 and the surface area of the large piston is 8 cm2. If 10 N of force is put on the small piston, how much force will be exerted on the large piston.
Question 8
If you use a force of 48 N to push a box 2 m across the floor, how much work did you do?
Answer:
96 Joules
Explanation:
The formula for work is Fnet times displacement (F x d = w) which, in this case, 48N is the Fnet and 2m as the displacement. Then all we need to do is multiply these two and we get 96 Joules.
What is one force listed below which helps to stop the
motion of a sled moving down a snowy hill on its own?
A.) Air Resistance
B.) Applied Force
C.) Gravity
D.) Buoyancy
Answer:
applied force
Explanation:
An applied force is a force that is applied to an object by a person or another object. If a person is pushing a desk across the room, then there is an applied force
A car moving at a constant speed changes direction. Is the car accelerating? How do you know?
Answer:
No
Explanation:
Acceleration is the rate of change in velocity. Here the car maintains a constant speed, no change in velocity
An unknown element has 5 protons, 5 electrons, and 6 neutrons what is the atomic mass of this element
The atomic mass is the protons + the neutrons.
So your answer would be 5 + 6 = 11.
Please mark Brainliest! :)
If a cup of coffee is at 90°C and a person with a body temperature of 36'C touches it,how will heat flow between them
Answer:
the heat always transfers from high temperature to low temperature body without aid of any external energy to this law the heat transfers from cup of coffee to the person body until both bodies reaches to the equilibrium state
Explanation:
Two football players run down the field. One has a mass of 70 kg and the other has a mass of 100 kg. Which player will be harder to tackle?
Answer:
The one with larger mass because of the momentum he has.
Explanation:
Momentum= mass x Velocity
As mass increase momentum increase.
Select the correct answer.
Which hand is negatively charged?
Answer:
b
Explanation:
Why are some telescopes placed in space?
There is no gravity in space so bigger, heavier mirrors or lenses can be used
Some types of electromagnetic radiation cannot penetrate Earth's
atmosphere
Space telescopes are less expensive that ground telescopes
Telescopes in space are able to get significantly closer to astronomical
objects
Answer:
to get around the Earth's atmosphere so that we can get a clearer view of the planets, stars, and galaxies that we are studying.
Explanation:
2. A book with a mass of 2 Kg is resting on a shelf 1.5 m off the floor. How much gravitational
potential energy does it have:?
Answer:
Book of mass 2 kg is lifted from floor to the table. The height between floor and the table is 1.5 m. Calculate the work done by gravitational force.
i hope this helps.......
A person is listening with his ear against the rail for an oncoming train. When the train is 1.65 km away, how long will it take him to hear the sound of the whistle?
Answer:
Time = 0.317 seconds.
Explanation:
Given the following data;
Distance = 1.65km to meters = 1.65 * 1000 = 1650 meters
We know that the speed of sound in steel is equal to 5200m/s
To find the time to hear the sound of the whistle;
Time = distance/speed
Substituting into the equation, we have
Time = 1650/5200
Time = 0.317 seconds.
Therefore, it will take him 0.317 seconds to hear the sound of the whistle.
A neutral oxygen atom has 8 protons and 8 electrons. It gains 2 electrons when it chemically combines with magnesium to form magnesium oxide (MgO). What is the charge of oxygen in magnesium oxide?
Answer:
in this ionic compound, oxygen has 2 excess electrons and magnesium has two electrons missing.
Explanation:
When oxygen is mixed in a chemical reaction, it acquires two electrons from magnesium, to become an ion with 2 negative .
Mg + O → MgO
Therefore, in this ionic compound, oxygen has 2 excess electrons and magnesium has two electrons missing
How much power is generated if 375 J of work is done in 15 s?
Answer: 25 watt
Explanation:
Given,
Work= 375 j
Time= 15
So, power = W÷t
= 375 ÷ 15
= 25 watt
Describe how we know the plates once formed a supercontinent and how we know this.
*at least 10 sentences*
thank you so much for your help :)
Answer:
How did scientists “discover” Pangea and other supercontinents of the past?Nowadays, they can study the geologic record and use radioactive dating, seismic surveys, and other technologies to construct maps of how the world looked at various points in Earth's history.
The force of gravity is twice as great on a 2-kg rock as on a 1-kg rock. Why then, dose the 2-kg rock not fall with twice the accelleration?
Answer:
because all objects fall at a rate of 9.8m/s²
A 6 kg bowling ball at rest is accelerated to a speed of 3 m/s. what is the momentum?
Answer:
18kgm/s
Explanation:
momentum of a body is given by:
M=mv, where m and v are the mass and speed respectively.
thus from the question ,simply ,
Momentum= 6•3=18kgm/s
Is this compound Ionic or Covalent? fr2o
Answer:
it is an ionic compound
Explanation:
A lorry pulls forward after initially being stationary, it takes the lorry 80m to reach a speed of
5m/s, calculate the lorry's acceleration.
Answer:
a=f/m
Explanation:
an object can still run with nonzero velocity even the net force acting on the body is zero true or false?
Answer:
This is true fact.
Well done bud keep up the hard work at school
true As a non-zero net force
If an ocean plate and a land mass plate converge , which one will sink
Answer:
The ocean plate will sink because it is much more dense than the continental plate.
Let me know if this helps!
3. Suppose a free-fall ride at an amusement park starts at rest and is in free fall.
a. What is the velocity of the ride after 2.3 s?
b. How far do people on the ride fall during the 2.3-s time period?
Answer:
[tex]v = 22.54m/s[/tex] --- Velocity
[tex]h = 25.921m[/tex] --- Distance
Explanation:
Given
[tex]u = 0m/s[/tex] --- Initial velocity
Solving (a): Velocity after 2.3s
To do this, we use the first equation of motion
[tex]v = u + at[/tex]
Where
[tex]t = 2.3s[/tex]
[tex]a = g = 9.8m/s^2[/tex]
So, the equation becomes:
[tex]v = 0 + 9.8 * 2.3[/tex]
[tex]v = 0 + 22.54[/tex]
[tex]v = 22.54m/s[/tex]
Solving (b): Distance covered in 2.3s
We make use of:
[tex]h = ut + \frac{1}{2}gt^2[/tex]
This gives:
[tex]h = 0 * 2.3 + \frac{1}{2}*9.8 * 2.3^2[/tex]
[tex]h = \frac{1}{2}*9.8 * 5.29[/tex]
[tex]h = 25.921m[/tex]
Reference frame definitely changes when what also changes?
Explanation is in the file
tinyurl.com/wpazsebu
Answer:
C) Position
Explanation:
just answerd right on edg
which continent had to move the furthest to get to where it is today based on where it was in Pangaea.
Asia I think that's right
Which type of resources do we have a limited supply of?
Explanation:
The resources that we value—time, money, labor, tools, land, and raw materials—exist in limited supply. There are simply never enough resources to meet all our needs and desires.
Explanation:
Time, money, labor, land , and raw materials
PLEASE HELP FILL IN TWO OPTIONS I WILL MARK BRAINLIEST IF RIGHT!
Answer:
Your answers are Continental crust and Mountain range.
Explanation:
Continental crust is the first blank, and Mountain range the second.
I hope I helped, and I always appreciate Brainliest!!! :)
what kind of mirror do u think s used in the side-view mirror of cars?
Answer:
The Convex Mirror is used.
Explanation:
Need help big time plz help
Answer: hmm
Explanation:
hmmm