Answers
Answer:
G
Explanation
The acceleration of gravity is constant, and = 9.8 m/s² , no matter what mass of the object is. Initial speed for both objects = 0 m/s. So, after 2 sec the objects will have the same speed and the same distance.
Answer G: speed=v, distance =d.
Related Questions
What is the advantage of the SI unit over CGS units?
Help me ...
answer it as fast as you can...
Answers
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
6. Two positive charges, each with 6.0 x 10^-6 C, are 0.75 meters apart.
What force exists between the two charges?
Answers
Answer: F = 5.76x10^-1 N
Explanation:
The force between two charges is:
F = k*q1*q2/r^2
where k = 9x10^9 N*m^2/C^2 is the Coulomb's constant.
q1 and q2 = 6x10^-6 C
and r is the distance between the charges, here r = 0.75m
then the force is:
F = ( 9x10^9 N*m^2/C^2)*6x10^-6 C*6x10^-6 C/(0.75m)^2 = 576x10^-3 N
F = 5.76x10^-1 N
We have a positive force, this means that we have a repulsive force.
A student is conducting a physics experiment and rolls four different-
sized marbles down identical ramps. The marbles have the following
masses:
Marble A: 1.0 gram
Marble B: 1.5 grams
Marble C: 2.0 grams
Marble D: 2.5 grams
Assuming the marbles reach the same speed, which will have the
greatest kinetic energy at the bottom of the ramp?
Answers
Answer:
I think the answer is C
Explanation:
Its heavy but not too heavy
F.
Using this formula m = =, If a car is pushed with a net force
of 5000N, resulting in an acceleration of 3.5m/s2, what is the
mass of the car?
a 1438.5kg
b 1428.6kg
c 1328.6kg
d 1421.6kg
Answers
Answer:
C
What is the answer please help her
Which two gases in the atmosphere are essential to life on Earth? *
Nitrogen and Helium
Oxygen and Carbon Dioxide
Neon and Argon
Hydrogen and Helium
Answers
Answer:
Explanation:
Oxygen and carbon dioxide
The structure of a main sequence star like our sun can hold for a long time because
A. Gravitation fore is counterbalanced by thermal expansion forces
B. The immense volume of matter
C. The rotational force
Answers
Answer: B
The immense volume of matter
Explanation:
Stars are formed by cloud and dust, draw together by gravity.
But the longevity of a main sequence star lives depends on how massive it is. An enormous massive star burns faster due to its enormous material it contains and higher core temperatures caused by greater gravitational forces. While a less massive star will burn slowly and stick around the sun for a very long period. The structure of a main sequence star like our sun can therefore hold for a long time because of the immense volume of matter of star.
Two identical speakers are 3.50 m and 5.20 m from a listener. What is the lowest frequency (n = 1) that would cause constructive interference there? PLS HELP!
Answers
For constructive interference the path difference must be an integer number of wavelengths. The lowest frequency for this would be the longest wavelength with the path difference equal to one wavelength.
Path length difference(m) = 5.20 - 3.50 = 1.70m.
λ =2m ⇒ f = v/λ
λ/2 =1.70
λ = 3.40m
Taking speed of sound as v = 340m/s:
f = v/λ = 340/3.40 = 100Hz.
What is constructive interference?"When two waves of identical wavelength are in phase, they form a new wave with an amplitude equal to the sum of their individual amplitudes."
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Answer:114
Explanation:
for Acellus
What is the net force acting on a .15 kg hockey puck accelerating at a rate of 12 m/s2
Answers
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
what was a luxury but is now considered a necessity.
Answers
Answer:
a cellphone
Explanation:
pls mark brainliest
Answer:
A car
Explanation:
A hockey puck moving at 28 m/s is caught by an 80,00 kg man who was at
rest. The man and puck move together after the collision. The pucks mass is
0.16 kg. What is the final velocity?
A. 0.06 m/s
B. 4.5 m/s
C. 1.36 m/s
D. 8 m/s
Answers
Answer:
A
Explanation:
all the work is in the attached file :D
Balance chemical reactions: please help question attached
Answers
hope this helps!
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
Answers
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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Based on the table, which isotope is best suited for use as a radioactive tracer for the body’s use of calcium? calcium-40 calcium-45 calcium-47 calcium-49
Answers
Answer:
calcium-47
Explanation:
Just did the test. Good Luck!
The isotopes of calcium are artificially produced to use them as a radioactive tracers. Calcium 47 is best suited for use as a radioactive tracers for body's use of calcium.
What is radioactive tracer?A radioactive tracer consists of a chemical compound in which one or more atoms are replaced by a radioisotope.
Out of the six isotopes of calcium, calcium 47 is the most suitable isotope.
Calcium-47 consists of the half-life of about five days. This duration is long enough for biological investigations.
Thus, Calcium 47 is best suited for use as a radioactive tracers for body's use of calcium.
Learn more about radioactive tracer.
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Identify the following equation: H2 - 2H+ + 2e
A. oxidation
B. reduction
C. redox
D. none of the above
Answers
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.
Which of the following are major problems with fission reactors? maintaining high temperatures disposal of hot water disposing of radioactive waste obtaining fuel
Answers
Answer:
hot water
Explanation:
Answer:
a
Explanation:
5. Coal, petroleum, natural gas, propane, and uranium are examples of
energy sources.
A. nonrenewable
B. renewable
C. biomass
D. Geocentric
Answers
Answer:
Nonrenewable
Explanation:
Coal, petroleum, natural gas, propane, and uranium are examples of nonrenewable energy sources.
What is energy sources?Energy sources are forms of potential energy that can be used to perform work.
What is nonrenewable energy sources?A nonrenewable resource is a natural substance that is not replenished with the speed at which it is consumed. It is a finite resource. Fossil fuels such as oil, natural gas, and coal are examples of nonrenewable resources.
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4. Convert this distance( 9cm)into MILES, using the scale provided:
Answer:
Answers
2. Which is a possible unit of mass?
gram
liter
meter
Answers
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
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
Answers
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.
Which of the following is a claim of special relativity?
A. All laws of physics apply to frames of reference that are changing
speed.
B. All laws of physics apply to frames of reference that are
accelerating
C. All laws of physics apply to frames of reference that are not
accelerating.
D. All laws of physics apply to frames of reference that start from
rest.
SUSM
Answers
HELP ASAP
this is for science, and if i get the questions right, I pass, but the teacher never taught us the lesson, idrk y. so i really need help:( Im giving away 20 points so please give me your best answers ;)
1. As an astronaut travels from the surface of Earth to a position that is four times as far away from the center of Earth, based on the Law of Gravity which of the following statement is true?
a. mass remains the same and the gravitational pull from Earth decreases
b. weight remains the same and the gravitational pull from Earth changes
c. weight increases and the gravitational pull from Earth stays the same
d. mass decreases and the gravitational pull from Earth increases
2. A satellite is sent into orbit around the Earth, In which of the following situation would the gravitational force be the greatest?
A. 1200 lb satellite orbiting 150 miles above Earth’s surface
b. 850 lb satellite orbiting 150 miles above Earth’s surface
c. 850 lb satellite orbiting 1500 miles above Earth’s surface
d. 1200 lb satellite orbiting 1500 miles above Earth’s surface
3. High and low tides are the regular pattern of rising and sinking ocean-water levels. They are caused when the sun’s gravity and the moon’s gravity pull on ocean water. The moon’s gravity has a greater effect on Earth’s oceans than the sun’s gravity. Why would the moon have a greater effect than the sun?
a. The moon has less mass than the sun.
b. The moon is closer to Earth than the sun.
c. The moon is not as hot as the sun.
d. The moon has less mass than Earth.
4. Which statement about the universality of gravity is false?
a. The gravitational force between two objects depends only on their masses.
b. Any two objects that have mass also have a force of gravity acting between them, no matter how far apart they are.
c. The gravitational force between two objects increases if the objects move closer together.
d. The gravitational force between two objects increases if mass is added to one object.
Answers
Answer:
1)a- mass never changes as you move from the earth
2)actually am not sure I haven't been taught that too
3)b
4)a-it doesn't depend only on mass but also weight
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
Answers
Answer:
The second one, the higher the hertz the higher the frequency we hear
Explanation:
Create a series circuit with a 10-volt battery and four 10-ohm resistors, as shown. Measure the current. A. Based on the voltage and current, what is the resistance of the circuit? (Hint: Use Ohm’s law.)
Answers
Answer:
0.25 A
Resistance= 40 ohms
Explanation:
The first, and perhaps most important, the relationship between current, voltage, and resistance is called Ohm's Law, discovered by Georg Simon Ohm and published in his 1827 paper. Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points. Introducing the constant of proportionality, the resistance, one arrives at the usual V=IR. Any Electrical device or component that obeys “Ohms Law” that is, the current flowing through it is proportional to the voltage across it ( I α V ), such as resistors or cables, are said to be “Ohmic” in nature.
Since we are not in a laboratory, we can not experimentally measure the current but it can be calculated from ohm's law.
Given that the four resistors are connected in series and
Req= R1 + R2 + R3 + R4
Since all are four ohm resistors
Req= 10 + 10+10+10 = 40ohms
Then;
V= 10 V
R= 40ohms
I= ???
From;
V=IR
I= 10/40
I= 0.25 A
Answer:
See the attachment for circuit and position of ammeter in the circuit to measure the current.
40ohms
Explanation:
Ammeter in always connected in series with other elements in the circuit.
Measured current= 0.25A
According to ohm's law
V=IR
10= (0.25) R
R= 40 ohms
If several forces are exerted on a system, calculate the work done by each force, then multiply the results.
Question 4 options:
True
False
Answers
Answer:
false, each force might have a different about and a different direction
False because each force might have a different about and a different direction.
What is force?A force in physics is an effect that has the power to alter an object's motion. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.
The vector sum of all the forces equals the net force. In other words, the net force is the sum of all forces, it is obtained by combining all forces as vectors. The net force is the sum of the force vectors A + B + C for the situation of the three forces on the force board.
Work done due to force is given as,
Work done, W = F.S cosФ
Where F is force a vector quantity, S is displacement and Ф is angle between them.
When forces are exerted in different direction than net force is calculated using vector sum.
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I need help if you can help me to get 10 points.
Answers
Answer:
It allows the reader to feel more connected to her purpose
Explanation:
If Cooper is using personal examples for her argument, she is allowing the reader see more of her point of view, which can also lead them to feel connected to her purpose
Hope this helps :)
Which is NOT a subjective feeling experience? A) Happy B) Sore C) Angry D) Sad
Answers
Answer:
b sore
Explanation:
because it's a physical feeling I think
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
Answers
As SCUBA divers go deeper underwater, the pressure from the weight of all the water above them increases tremendously which compresses the gases in their blood. What happens to the volume of gas in their blood as the diver rises quickly to the surface?
A.
As a diver rises, the pressure on their body decreases which allows the volume of the gas to decrease.
B.
As a diver rises, the pressure on their body increases which allows the volume of the gas to decrease.
C.
As a diver rises, the pressure on their body decreases which allows the volume of the gas to increase.
D.
As a diver rises, the pressure on their body increases which allows the volume of the gas to increase.
Answers
Answer: A.
As a diver rises, the pressure on their body decreases which allows the volume of the gas to decrease.
Explanation:
The problem is that a diver, experiences an increased pressure of water compresses nitrogen and more of it dissolves into the body. Just as there is a natural nitrogen saturation point at the surface, there are saturation points under water. Those depend on the depth, the type of body tissue involved, and also how long a diver is exposed to the extra pressure. The deeper a diver go, the more nitrogen the body absorbs.
The problem is getting rid of the nitrogen once you ascend again. As the pressure diminishes, nitrogen starts dissolving out of the tissues of the diver's body, a process called "off-gassing." That results in tiny nitrogen bubbles that then get carried to the lungs and breathed out. However, if there is too much nitrogen and/or it is released too quickly, small bubbles can combine to form larger bubbles, and those can do damage to the body, anything from minor discomforts all the way to major problems and even death.
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
Answers
Answer:
3!
Explanation:
have a nice day
David drinks a glass of water in his kitchen. The water is at room temperature, and David
decides to make it colder by adding ice. Which of the following describes why the ice cubes
will melt?
A. Liquid water is reacting with solid water to absorb energy.
B. Water is evaporating from the surface of the water.
C. Slow-moving molecules move out of the ice.
D. Heat from the water moves into the ice.
Answers
Answer:
I think it's C
Explanation:
