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
the energy produced by the internal motion of atoms? electrical , thermal, chemical, nuclear
Answer:
Thermal energy, or heat, is the energy that comes from the movement of atoms and molecules in a substance. Heat increases when these particles move faster. Geothermal energy is the thermal energy in the earth. Motion energy is energy stored in the movement of objects. so the answer is thermal energy
According to evidence presented in both the text and video, which statement is the most accurate regarding the relationship between stress and the
immune system?
a.Stress activates foreign invaders that would otherwise lie dormant
b.Stress does not cause illness but restrains the immune system's ability to fight foreign invaders
c.Foreign agents invade the body and make it more susceptible to stressors
d.Stressors wear on the body, causing invading agents such as cancer to generate spontaneously
Answer:
Stress does not cause illness, but restrains the immune system's ability to fight foreign invaders
Explanation:
It's correct :)
Compare the concepts of mass and weight. Name three differences.
Answer:
1a)Mass is the amount of matter in the body.
1b)Weight is the measure of the amount of force acting on a mass due to acceleration and gravity.
2a)Mass can never be zero
2b)Weight can be zero if no gravity acts upon an object. like in space
3a) Mass does not change according to location.
3b)Weight varies according to location.
What is the correct answer! Thank you for your help
Define one solar day
Answer:
the time between successive meridian transits of the sum at a particular place
A spinning wheel on a fireworks display is initially rotating in a counterclockwise direction. The wheel has an angular acceleration of -4.20 rad/s2. Because of this acceleration, the angular velocity of the wheel changes from its initial value to a final value of -26.0 rad/s. While this change occurs, the angular displacement of the wheel is zero. (Note the similarity to that of a ball being thrown vertically upward, coming to a momentary halt, and then falling downward to its initial position.) Find the time required for the change in the angular velocity to occur.
Answer:
The time it takes for the change in the angular velocity to occur is 6.5 seconds
Explanation:
From the question, we have;
The angular acceleration of the wheel, α = -4.20 rad/s²
The final angular velocity of the wheel, ω = -26.0 rad/s
From the information, we have the initial direction of rotation of the wheel = Counterclockwise
The angular displacement while the change occurs = 0 rad/s
Therefore, the initial angular velocity of the wheel, ω₀ = 0 rad/s
We have;
[tex]\alpha = \dfrac{\omega -\omega _0 }{t - t_0}[/tex]
Where;
t - t₀ = The time it takes for the change to occur
[tex]\alpha = \dfrac{\omega -0 }{t - 0}[/tex]
When t₀ = 0, we have;
t - t₀ = t
[tex]\alpha = \dfrac{\omega }{t}[/tex]
[tex]\therefore t = \dfrac{\omega}{\alpha }[/tex]
[tex]\therefore t = \dfrac{-26 \, rad/s}{-4 \, rad/s^2 } \approx 6.5 \, seconds[/tex]
The time it takes for the change in the angular velocity to occur is t - t₀ = 6.5 seconds
An object's speed is 0.8 m/s, and its momentum is 200 kg-m/s What is the mass of the object?
A. 250kg
B. 200kg
C.160kg
D.128kg
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!
the movement of a body between any two points in any direction is called
Answer:
I think is called Motion
but am not sure
Answer:
Maybe its displacement, I'm not sure?
Explanation:
A particle was moving in a straight line at 172.8 km/hr. If it decelerated over 120 meters to come to rest, find the time taken to cover this distance.
Answer:
v=s/t
s=vt
t=s/v
t=(120×10‐³)/172.8
(the distance meters has been changed to kilometres)
t=1/1440 hrs
Given ,
A beta particle emitter is Cobalt - 60. Cobalt - 60 decays to Nickel in an exited state.
Then gamma rays are emitted to bring Nickel to its ground state.
Discuss how you would use a Beta-particle source to investigate the penetration limits of beta-particles in the laboratory.
Which of these two sources, strontium-90 or cobalt-60, would be more suitable to
use for the penetration experiment above. Justify your answer.
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.
Two astronauts (each with mass 70 kg) push off each other in space. One astronaut carries 46.7 kg of equipment and moves away with a speed of 0.3 m/s.
Calculate the velocity of the other astronaut.
Answer:
Kindly, Refer to the attachment...Make
a claim about what might happen to a
population of rabbits in a forest if a new
predator moved to the forest. Cite evidence
to support the claim and explain your
reasoning.
Answer: The rabbits will die off and the things that rabbits eat will overpopulate.
Explanation:
Calculate the work done when lifting a sack of potatoes with a force of 100N vertically
6m.
Answer:
600J
Explanation:
W=Fd so, W=100*6=600J
(b)
Describe how the horizontal forces acting on the car change during the first two seconds
of the acceleration.
Answer:
Driving force increases, friction forces increase, the driving force is bigger than friction 12.
Explanation:
hii please help i’ll give brainliest!!
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.
A 1,500 kg car is at rest on a level track. The driver gives the engine gas and the car begins to accelerate forward. The car moves from 0 m/s to 27 m/s in 8 sec. What is the acceleration of the car?
Answer:
3.375 m/s²
Explanation:
Using equation of motion:
v = u + at
Here, v = 27m/s & u = 0m/s & t = 8 sec
Let the acceleration be a.
=> 27 = 0 + 8(a)
=> 27/8 = a
=> 3.375 m/s²
6. _______________ : when a certain number of waves pass a given point for a certain number of seconds? Group of answer choices A. wavelength C. amplitude D. height B. frequency
Ill give brainly-ist.
Answer:
b
kakanandnanjsnMajdnAnnznnzkkzid
Answer:
Frequency
Explanation:
I just took that test
would this be Newtons 1st, 2nd, or 3rd law
Answer:
Newton's First Law of Motion.
Explanation:
Newton's First Law of Motion states that a body continues its state of motion untill and unless an external force acts on it. Here, the truck moves forward even after the breaks are applied in order to maintain its State of motion.
Brainliest for correct answer :)
Choose The 3rd Option.
.....
The speed of light in air is 3 x 108 m/s. The speed of light in ice is 2.29 x 108 m/s. What is the refractive index from air to ice?
Answer:
η = 1.31
Explanation:
The formula for the refractive index of from air to some other medium is given by the following formula:
[tex]\eta = \frac{c}{v}\\[/tex]
where,
η = refractive index = ?
c = speed of light in air = 3 x 10⁸ m/s
v = speed of light in ice = 2.29 x 10⁸ m/s
Therefore, using these values in the equation we get:
[tex]\eta = \frac{3\ x\ 10^8\ m/s}{2.29\ x\ 10^8\ m/s} \\[/tex]
η = 1.31
Question 3 (1 point)
✓ Saved
3
A group of physics students has been given a small stereo speaker and told to use it
for investigating sound waves. After much experimentation, the students discover
that the speaker works by quickly moving in and out. This process pushes the air
around it in little bursts that travel in the same direction as the speaker's motion.
Based on these observations, how should sound waves be categorized?
6
An electromagnetic wave that has transverse vibrations
A mechanical wave that has longitudinal vibrations
An electromagnetic wave that has longitudinal vibrations
A mechanical wave that has transverse vibrations
Activat
Answer:
Soundwave should be categorized as follows;
A mechanical wave that has longitudinal vibrations
Explanation:
Sound wave should be categorized as longitudinal waves that vibrate the particles of the medium transmitting sound energy layer by layer along a path parallel to the direction of propagation of the wave
Therefore, soundwave should be categorized as a mechanical wave because it is generated and propagated by the vibration of a source and the interaction of the source with the particles of the medium in which the source is located
soundwave is also a longitudinal wave because the direction of vibration of th particles of the medium through which the sound wave is transported is in the same direction as the wave
Therefore, sound wave should be categorized as mechanical wave that has longitudinal vibrations.
The soundwave should be categorized where the mechanical wave that has longitudinal vibrations
What is a sound wave?
It should be categorized at the time when the longitudinal waves should be vibrated the particles with respect to the medium transmitting via layer along with it the path should be parallel to the propagation direction of the wave. Also, it should be categorized as the mechanical wave since there should be the vibration of the source.
Learn more about waves here: https://brainly.com/question/1820914
What would be the mass of an object that has a force of 88N and an acceleration of 12 m/s2?
Answer:
7.33 kg
Explanation:
F = ma
88 N = m(12 m/s^2)
m = 7.33 kg
HELPPP 15 points
If you can hear your sibling playing music in their room when you are in your room with the door closed, this is due to sound wave ____
a. absorption
b. reflection
c. refraction
d. transmission
its not a or b I believe it's d but I'm not positive
What determines the
carrying capacity in an
ecosystem?
A. The number of different species in
the ecosystem
B. Limiting factors
C. Only biotic factors
D. Only abiotic factors
Answer:
Your answer is B. Limiting factors
Explanation:
Brainliest pleaseeee
Do energy drinks actually provide energy?
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.
Which statement correctly describes the relationship between air temperature and air pressure?
-Warm air rises, creating an area of low pressure.
-Cool air sinks, creating an area of low pressure.
-Warm air sinks, creating an area of low pressure.
-Cool air rises, creating an area of low pressure.
if the temperature is constant and the pressure increases, then the volume will ____.
what is the total energy a 60W incandescent light bulb in KWh will consume in 336 hours?
(60 W) x (336 hrs) = 20,160 W-hr
That's 20.16 KWh .
At which latitude would tropical rain forests be most likely?
(giving brainliest)
-10 degrees North
-30 degrees South
-60 degrees North
-90 degrees South
In order to increase the force in an ideal spring by a factor of 5, the compression must increase by a factor of?
Answer:
try this answer out and let see