Answer:
Q=mc∆tita.
4780J= m × 2445J/kg/°C × 5.43°C
4780J= m× 13276.35J/kg
m= 0.36Kg
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
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
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:
Is this compound Ionic or Covalent? fr2o
Answer:
it is an ionic compound
Explanation:
A 2 kg hammer is 0.4 m above the ground. What is its PE?
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
Please help??!
Which of the following uses repeating vowel sounds?
1.The cold, soulless vacuum of space
2. Cool, blue, moonlit room
3. If loneliness is a disease, love is the cure
4. Windy, whooshing weather
Answer: 4. Windy, whooping weather
Explanation: b/c it is!
Answer:
Windy, whooping weather
Explanation:
thats the answer
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:
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
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
Select the correct answer.
Which hand is negatively charged?
Answer:
b
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.
what kind of mirror do u think s used in the side-view mirror of cars?
Answer:
The Convex Mirror is used.
Explanation:
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.
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
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.
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:
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
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
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!!! :)
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
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 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
Need help big time plz help
Answer: hmm
Explanation:
hmmm
A bomb, originally sitting at rest, explodes and during the
explosion breaks into four pieces of exactly 0.25 kg each.
One piece flies due south at 10 m/s while another piece flies
due north at 10 m/s. The other two pieces travel in
directions.
Answer:
opposite
Explanation:
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]
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! :)
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
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!
PLEASE HELP!!! GIVING BRAINLIEST!! ill also answer questions that you have posted if you answer these correctly!!!! (40pts)
Answer: A
Explanation:
Just speed I think.
Speed is scalar, while velocity is a vector so you would need a direction. For acceleration you would need to know the specific speed at different points in time.
A cheetah can run 140 miles in 2 hours.
The information we can calculate about the cheetah given this information is the "speed" (A).