Answer:
B.C. D. G.
Explanation:
A vector quantity, has both magnitude and direction. A tip to remember is if you can add a direction to it! You wouldnt say 30 pounds north, but you would say 30 mph north.
I hope this helped! Comment if you have any questions! :)
A 31 g block of ice is cooled to -76°C. It
is added to 592 g of water in an 75 g copper
calorimeter at a temperature of 21°C.
Find the final temperature. The specific
heat of copper is 387 J/kg • °C and of ice is
2090 J/kg . °C. The latent heat of fusion of
water is 3.33 x 10 J/kg and its specific heat
is 4186 J/kg °C.
Answer in units of °C.
Answer:
Final temperature is approximately 18.09⁰C
Explanation:
Solution is in the attached pictures
Write the formula for kinetic energy that uses force in its equation. Calculate the kinetic energy generated when a 2500 N force is applied to a car when moving it 200 m. Show work.
Answer:
500000 J
Explanation:
ΔKE =Work = F*d = 2500 N * 200 m =500000 J
Please help! I will give Brainliest! The image shows a cross section of a landscape and a well.
1: Land surface. 2: Unsaturated zone. 3: Groundwater. 4: Saturated zone.
Please Hurry timed test! Which of the layers shown is an aquifer?
1
2
3
4
Answer:
3!
Explanation:
have a nice day
what was a luxury but is now considered a necessity.
Answer:
a cellphone
Explanation:
pls mark brainliest
Answer:
A car
Explanation:
Two sounds are played for you. The first has a frequency of 196 Hz. The second has a frequency of 392 Hz. Which sound will be "higher" to your ear?
A) The First
B) The Second
C) They will sound the same
Answer:
The second one, the higher the hertz the higher the frequency we hear
Explanation:
An acrobat performs with a swing, as shown in the diagram . Which of these most likely happens as the acrobat moves from Point 1 to Point 2?
A. Potential energy decreased and kinetic energy increases.
B. Potential energy increases and kinetic energy decreases.
C. Both potential and kinetic energy increase.
D. Both potential and kinetic energy decrease.
Even on a windy day, most plants can remain upright. Which structure plays the greatest role in providing a plant with this type of support?
A. nucleus
B. mitochondrion
C. cell wall
D. skeleton
Which BEST describes one way igneous rocks form?
A. Sedimentary rocks erode.
B. Sedimentary rocks are compacted.
C. Metamorphic rocks are melted, then cooled.
D. Metamorphic rocks are deposited and cemented.
Pls help! will give brainliest and 75 Points for the correct answers!
Answer:
Well, The first question is C. Both potential and kinetic energy increase. Then, The second question is C. Cell wall. And, The last one is B. Sedimentary rocks ate compacted. Good Luck!
The two major problems with most motor vehicles are that they burn fossil fuels and _____________.
A. Create radioactive waste
B. Create thermal pollution
C. Release chlorofluorocarbons
D. Release greenhouse gases
Answer:
The two major problems with most motor vehicles are that they burn fossil fuels and. Release greenhouse gases ( D)
The two major problems with most motor vehicles are that they burn fossil fuels and release greenhouse gases. Option (D) is correct answer.
What are the greenhouse gases?The Earth's atmosphere naturally contains these gases or compounds. But humans are also responsible for their release. These gases are essential for capturing the heat from the Sun and gradually raising Earth's temperature. Because of the balance between the energy it absorbs and the energy it reflects back into space, the Earth is habitable for people.
The greenhouse effect is the term used to describe how the greenhouse gases in the atmosphere capture and emit radiation. Without this mechanism, Earth would either be extremely cool or extremely hot, which would make life on the planet impossible.
The greenhouse effect occurs naturally. The release of industrial gases into the atmosphere, the burning of fossil fuels, and other improper human activity are all contributing to an increase in greenhouse gas emissions.
As a result, this has contributed to global warming.
Learn more about greenhouse gas here:
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Are plants carnivores
Ture or False
Answer:
False they are producers and they don' eat anything only produce and provide
Explanation:
PLS I NEED THIS QUICK!!!!WILL GIVE BRAINLY!
you decide to push on a brick wall with all your might for 5 minutes. you push so hard that you begin to sweat. however, the wall does not move. if you end up pushing with a force of 500 newtons, how much work did you do?
Answer:
2500
Explanation:
Identify the following equation: H2 - 2H+ + 2e
A. oxidation
B. reduction
C. redox
D. none of the above
Answer:
(A.) H2 --> 2H+ 2 e- (oxidation)
Explanation:
A. oxidation is the removal of electron(s) from a substance. This is the case here, since AFTER the reaction you can see that there were electons "removed" from H2.
H2 --> 2H+ 2 e- (oxidation)
B. reduction is the addition of electron(s) to a substance
1/2 O2 + 2 e- + 2H+ --> H2O (reduction)
By the way:
Biochemical reactions often involve the transfer of complete hydrogen atoms, meaning an electron and a proton.
The substance oxidized (H2) is electron donor.
The substance reduced (O2) is electron acceptor.
Just remember this:
Prior to the reaction, the e donor is always reduced.
Prior to the reaction, the e acceptor is always oxidized.
A solar flare is a very high energy event on the surface of the sun. Which wavelength is best to observe such an event?
- visible light
-microwaves
-xray
-infrared
Two source charges are placed close together. The electric field vectors close to the charges all point toward the charge on the right and away from the charge on the left. A positive test charge is released in the middle. Which way will the test charge move?
A.
to the right
B.
to the left
C.
up
D.
down
Which of the following is a homogenous mixture?
Answer:
Blood
Explanation:
Homogenous means the same type and a box with toys, spaghetti and meatballs, and trail mix all have variety.
Answer:
B is the correct answer
What are the two ways to create plasma?
Answer:
Plasma can be artificially generated by heating a neutral gas or subjecting it to a strong electromagnetic field to the point where an ionized gaseous substance becomes increasingly electrically conductive.
Answer:
By heating a natural gas
Explanation:
Plz Help! Will give brainliest!!
If the work output of a simple machine is 40 J and the work input is 50 J, the percent efficiency is _____%.
A. 5/4
B. 10
C. 80
D. 90
Answer: 80%
Explanation:
Answer:
C.80
Explanation:
Alex has to pick up a 20 N stack of documents and raise them 5 meters from the floor.
A. How much work does Alex do on the stack of documents as he lifts it?
B. While Alex is holding the documents, what type of energy do they have relative to the floor?
C. Alex gets tired and drops the documents to the floor. As the stack falls, what type of energy does it possess?
Answer:
1.Work done=100 joules
2.potential energy
3.kinetic energy
Explanation:
W=Force x distance
w= 20 N x 5 M
W = 100 JOULES
What is the net force acting on a .15 kg hockey puck accelerating at a rate of 12 m/s2
Answer:
The net force is 1.8N
Explanation:
Given that the formula for force is Force = mass×acceleration. So you have to substitute the values into the formula :
[tex]force = mass \times acceleration[/tex]
Let mass = 0.15kg,
Let acceleration = 12m/s²,
[tex]force = 0.15 \times 12[/tex]
[tex]force = 1.8[/tex]
Answer:
1.8 Newtons
Explanation:
We want to figure out the net force acting on a 0.15 kg hockey puck that has an acceleration of 12 m/s². To solve this, we must apply Newton's Second Law of Motion which is denoted by the formula: f = ma.
Here, f is the force, m is the mass, and a is the acceleration. Plug our given values in to find f:
f = ma
f = (0.15 kg) * (12 m/s²) = 1.8 Newtons
Thus, the answer is 1.8 N.
~ an aesthetics lover
Which of the following gives the best description of the motion of electrons in a conductor?
A.
The electrons in conductors usually move in straight lines.
B.
The electrons in conductors are able to move about freely.
C.
The electrons in insulators are unable to move about freely.
D.
The electrons in conductors usually move in regular patterns.
Answer:
The correct answer is B. The electrons in conductors are able to move about freely.
Explanation:
The conductive materials are those that have an atomic structure that favors that the electrical charges can be easily moved inside. That is, a conductive material is one that allows the transport of electric charge, presenting little resistance to the movement of electric charge or electrons when an electric field is applied.
The arrangement and freedom of movement of the electrons along the atomic structure is what favors the circulation of electricity through the conductor.
So, the correct answer is B. The electrons in conductors are able to move about freely.
Which is NOT a subjective feeling experience? A) Happy B) Sore C) Angry D) Sad
Answer:
b sore
Explanation:
because it's a physical feeling I think
2. Which is a possible unit of mass?
gram
liter
meter
Answer:
Gram
Explanation:
Meter is a unit used to measure length and liter is used to measure liquids therefore using process of elimination the answer has to be gram
What happens at the condensation point?
Answer:
Dew point is the temperature at which condensation happens. ... When warm air hits the cold surface, it reaches its dew point and condenses. This leaves droplets of water on the glass or can. When a pocket of air becomes full of water vapor, clouds form.
Explanation:
Answer:
Dew point is the temperature at which condensation happens. ... When warm air hits the cold surface, it reaches its dew point and condenses. This leaves droplets of water on the glass or can. When a pocket of air becomes full of water vapor, clouds form.
Explanation:
The temperature at which a material changes from a gas to a liquid; the same as the boiling point. Condensation is the process by which water vapor (gas) in the atmosphere turns into water (liquid state). It is the opposite of evaporation. ... As the surrounding temperatures fall (cool), the water vapor turns into very tiny particles of water and ice crystals.
What is the advantage of the SI unit over CGS units?
Help me ...
answer it as fast as you can...
Answer:
The advantage of the SI unit over CGS unit are:
S.I has broader base. It has seven base units and two supplementary units.S.I is metric.S.I is coherent.S.I is rational, i.e. it gives one unit for one physical quantity .e g. for energy of any type i.e, mechanical or heat or electrical.There is only one unit Joule(J) but in M.K.S system unit for mechanical energy is joule.HOPE IT WILL HELP YOU
Units of measurements
The advantage that SI unit has over CGI is that it has only one unit for each measurement
Explanation:
CGS: Also known as Gaussian units
Length is measure in cm (centimeter)
Mass is measured in g (gram)
Time is measured in s (second).
SI unit: The International System of Units
Length is measure in meter (m)
Mass is measured in kilogram (kg)
Time is measured in seconds (s)
In summary with the SI unit student do not need to store any conversion factors in memory
Terry can ride 30 miles in 2 hours. If his riding speed is
reduced by 3 mph (mile/hour), how far can he ride in 1.7 hours?
miles
Answer: 20.4 miles
Explanation:
Here we need to use the equation:
Velocity = Distance/Time.
Initially we have that he can travel 30 miles in 2 hours, so the velocity is:
V = 30mi/2h = 15mph
Now, we reduce the velocity by 3 mph, so the new velocity is 15mph - 3 mph = 12mph.
Now we want to know the distance traveled in 1.7 hours with this velocity, this is.
Velocity*Time = Distance
12mi/h*1.7h = 20.4 miles
What is a terrestrial planet? Please help fast
Answer:
the planet where there is life living on its surface is terrestrial planet
During which two phases would surfer’s most likely benefit
A. New and Full Moon
B. New moon and Waxing Crescent
C. Full Moon and Waxing Gibbous
D. 1st Quarter and 3rd Quarter
The phases where surfer’s most likely benefit include D. 1st Quarter and 3rd Quarter.
Surfers will benefit include during the 1st Quarter and 3rd Quarter because there's tidal change. Tidal change is when coastal areas experience two low and high tides.
The benefit of surfing during this period is that it helps jack the waves. Waves transmit energy and this is important to surfers.
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the magnification priduced by a spherical mirror is +1/4.what type of image is formed?
Explanation:
As the magnification is positive , thus the image formed is inverted and real
3. Which of the following is an example of a
supplemental restraint system?
(a) air bag
(c) lap and shoulder belt
(b) safety belt
(d) antilock brakes
Answer:
A) air bag is your answer
Answer:
air bag
Explanation:
Any of several restraining systems in a vehicle, such as an airbag, in addition to the seatbelts.
What effect does force have on the motion of an object?
Answer:
When a force acts on an object that is stationary or not moving, the force will cause the object to move, provided there are no other forces preventing that movement. If you throw a ball, you are pushing on it to start its movement. If you drop an object, the force of gravity causes it to move.
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ASAP pls answer Right please I have soooo much work they overwork me
What needs to be the relation between the two forces to cause the upper magnet to float without moving?
Answer:
If it points the other way, the fields subtract, for a lower energy, and so the magnet prefers to turn to point in this way. Magnets in uniform fields feel torques which make them turn around if they are not pointing in the right direction, but there is no net force making the magnet want to levitate.
Explanation:
