Answer:
gold, silicon
Explanation:
i think this is the write answer
Answer:
Gold is not a compound
Explanation:
In which of the following situations or places would you want to reduce the
force of friction?
I A. Skiing down a hill during a race.
B. Walking down a steep hill.
C. Sitting in the bed of a pickup truck while it turns a corner
D. In the axle of the wheels while you ride your bicycle.
Answer:
D
Explanation:
The correct answer would be in the axle of the wheels while you ride your bicycle.
Options A, B, and C requires that the forces of friction is increased in order to have more control.
However, option D requires that there is a minimal frictional force in the axle of the wheels of a bicycle while riding so that a little effort would be required to keep the bicycle moving.
The lesser the friction, the lower the effort that would be needed to keep the bicycle moving and vice versa.
A scientist adds different amounts of salt to 5 bottles of water. He then measures how long it takes for the water to boil. what is the dependent variable in this experiment?
If the period of a certain wave (wavelength = 4.5 m) is 2 seconds, what is the speed of the wave?
0.44 m/s
1.1 m/s
9.0 m/s
2.3 m/s
Answer:
2.25m/s
Explanation:
wavelength=4.5m
period=2sec
frequency= 1/period
=1/2
speed= wavelength×wave frequency
=4.5×1/2
=2.25 m/s
so, none of the options are correct
Answer:
2.3 m/s
Explanation:
I took the test.
you are on the airplane, about to fly to an exotic location. How do acceleration, speed and inertia work to overcome the forces of gravity and air resistance during the take-off?
Answer:
Make a paper airplane and have him toss it. his arm would be the thrust, the wings would provide lift, the shape of it would minimize drag (air resistance). However, if he put an engine on the same airplane, it would do the same thing as your arm would do.
So thrust, lift, shape.... Inertia is just a by product of the force that pushing you into your seat.
What constant horizontal force is required to drag a 5 kg block along a
horizontal surface with an acceleration of 1 ms-2 if the coefficient of
sliding friction between the block and the surface is 0.5.
Answer:
25N
Explanation:
formula=> Frictional force= coefficient of friction x normal reaction
normal reaction is mass x gravity(10N/kg)
so Frictional force= 0.5x5x10
=25N
but that is the Frictional force not the constant force
to get the constant force, subtract the Frictional force from the weight of the block
weight= mass x gravity
= 5x10
= 50N
50N-25N
=25N
Do you believe the right to property is a natural right? Why or why not?
A camera lens focuses on an object 75.0 cm from the lensThe image forms 3.50 cm behind the lens. What is the magnification of the image?
Answer:
7/150
Explanation:
The following data were obtained from the question:
Object distance (u) = 75cm
Image distance (v) = 3.5cm
Magnification (M) =..?
Magnification is simply defined as:
Magnification (M) = Image distance (v)/ object distance (u)
M = v /u
With the above formula, we can obtain the magnification of the image as follow:
M = v/u
M = 3.5/75
M = 7/150
Therefore, the magnification of the image is 7/150.
Answer:
-0.0466
Explanation:
what are three reasons we should be concerned about the current rapid extinction rate
Answer:
1. Possibility of all life being wiped out
2. Ecosystem being imbalanced.
3. Loss of one species triggers the lost of others as the food chain will collapse.
Answer:
a
Explanation:
Which of the following is a scalar quantity?
O A. 8 km/hr down
O B. 45 ft to the right
O C. 100 ft/min
O D. 25 m/s south
The graph below shows the conservation of energy for a skydiver jumping out
of a plane and landing safely on the ground. Which energy is represented by
line B?
A. Elastic energy
B. Kinetic energy
C. Light energy
D. Potential energy
Answer:
The correct option is:
B) Kinetic Energy
Explanation:
We know that if a body is placed at a certain height, it possesses Potential Energy, which is represented by 'mgh'. In this case, when the skydiver is present in the plane, before jumping, he has potential energy as he is at height 'h'.
As Kinetic energy is given as '(1/2)mv²' dependent on velocity of the object, when the skydiver jumps of the plane, his height starts decreasing, which decreases his Potential Energy. As energy can neither be created or destroyed, but is converted to one form or another, all this Potential energy starts to convert into Kinetic energy. As Potential Energy decreases with distance, Kinetic energy increases. Hence, line B represents Kinetic Energy.
in a car how does an airbag minimize the force acting on a person during a collision
Answer:
It increases the time it takes for the person to stop.
Explanation:
Answer:
It increases the time it takes for the person to stop.
Explanation:
a toy airplane is flying at a speed of 8 m/s with an acceleration of 0.9 m/s^2. How fast is it flying after 2 seconds? A)9.8 m/s B)8.1 m/s C)5.2 m/s D)3.6 m/s
Answer:
A) 9.8m/s this answer is correct.
The acceleration is increasing by 0.9m/s^2 .
so, in each second it will increase by 0.9m/s^2.
Therefore, in 2 second
0.9 * 2
= 1.8m/s
Now,
8 + 1.8
= 9.8m/s
Referring to the above diagram, how high will the ball rise on the right-hand incline?
0 cm
7 cm
15 cm
no way to tell
Calculate the orbital radii for the first six principal quantum numbers
Answer:
Explanation:
Formula for calculating radius is
r=.529A x n^2 where A=10^-10m
So put n=1,2,3,4............
What is the energy conversion in a hair dryer?
A. Heat energy to electric and mechanical energy
B. Potential energy to electric and kinetic energy
C. Electric energy to heat and kinetic energy
D. Light energy to mechanical and electric energy
Answer:
C.Electrical energy to heat and kinetic energy
What is the tendency of a material to oppose the flow of charge?
I think the answer is Resistance. If the link i posted int he comment is right.
You push a cart with mass 15 kg forward , giving it an acceleration of 3 m/s ^ 2 . How much force did you apply ? O A. 0.2N O B. O 18N O D. 45 N
Answer: force = mass x accelegation
Explanation: 15x3 = 45 N
Answer:
A
Explanation:
As your bike coasts downhill, your speed goes from 2 m/s to 4 m/s in 0.5 seconds. What is your acceleration?
A. 4 m/s
B. 1 m/s
C. 2 m/s
D. 8 m/s
Answer:
A.4m/s
Explanation:
(4m/s-2m/s)÷0.5s
=2m/s÷0.5s
=4m/s
A portable electric heater has a resistance of 10 ohms. It plugs into a wall outlet that is 120 V. How much current, in amps, does it draw?
Answer:
12 A
Explanation:
I = V/R = 120 V/ 10 Ohm = 12 A
In a closed system, _____ energy is equal to potential energy plus kinetic energy. A. mechanical B. electrical C. thermal D. chemical
Answer:
Well, Your answer is Mechanical. Because, The Mechanical energy is the sum of the kinetic energy and the potential energy. In the closed systems, The mechanical energy is equel to potential energy plus kinetic energy.
Good Luck!!~
By Itsbrazts
Answer: Mechanical Energy
Explanation: The Mechanical energy of an object is equal to Potential energy plus Kinetic energy.
A 51-kg woman runs up a vertical flight of stairs in 5.0 s. Her net upward displacement is 5.0 m. Approximately, what average power did the woman exert while she was running?
Answer:
510
Explanation:
Power= Rate of doing work i.e work done\time
=force*displacement\time
=mass*g*d\t
=51*10*5/5
=510watt
hydrogen bonding is a strong attractive force. T OR F
Answer:
F
Hope it helps you!
What is the purpose of putting dimples on the surface of materials?
Answer:
Dimples help the golf ball convert spin into lift.
But it was quite an accident that this effect was discovered.
Explanation:
Please i need a Brainliest.
Answer: It depends on the material and its purpose.
Explanation:
at a surface level question, I would assume for the most part, less area available for friction.
How many ohms of resistance must be present in a circuit that has 240 volts and a current of 15 amps?
ОА.
3,600 ohms
О В.
16 ohms
230 ohms
D. 0.063 ohms
Answer:
16 ohms
Explanation:
V= I ⋅ R
where, V is the net potential difference in the circuit, I is the current in the circuit and R is the net resistance of the circuit.
In this case, V = 240 volts, I = 15 amperes.
240 = 15 ⋅ R
⇒ R = 240/ 15 = 16 ohms
Answer:
b-16ohms
Explanation:
If you are using online learning/PLATO the answer is proven to be B-16 ohms
"We the people of the United States, in order to form a more perfect union, establish justice, insure domestic tranquility, provide for the common defense, promote the general welfare, and secure the blessings of liberty to ourselves and our posterity, do ordain and establish this Constitution for the United States of America." - The United States Constitution According to the Preamble, which action would be allowed by The Constitution?"We the people of the United States, in order to form a more perfect union, establish justice, insure domestic tranquility, provide for the common defense, promote the general welfare, and secure the blessings of liberty to ourselves and our posterity, do ordain and establish this Constitution for the United States of America." - The United States Constitution According to the Preamble, which action would be allowed by The Constitution? A) helping businesses pay their workers less B) giving Congress the power to create courts C) granting government the power to seize people's property D) securing the rights of the wealthy over the rights of the poor
The correct answer is B) Giving Congress the power to create courts
Explanation:
One of the principles the Constitution mentions in the preamble is Justice, this is mentioned in "We the people of the United States, in order to form a more perfect union, establish justice..." According to this, a priority is to make the country have justice, which is possible through courts, laws, among others. In this context, the action that would be allowed is "Giving Congress the power to create courts" because this might ensure the justice principle is applied in the U.S.
The voltage in a lightbulb is given by the equation V = IR. In this equation, Vis
the voltage, / is the current, and Ris the resistance. What is the resistance in a
lightbulb with a voltage of 25 V and a current of 0.2 A?
Answer:
R = 125 ohms
Explanation:
V = i * R
R = V / I
V = 25
I = 0.2
R = 25 / 0.2
R = 250 / 2
R = 125 ohms
What are data?
A. Pieces of information recorded in an experiment
B. Sources that summarize a primary source
C. Educated guesses about the outcome of an experiment
D. Variables that are adjusted by the experimenter
SUBNIIT
Answer:
Data is pieces of information recorded in an experiment because data are individual pieces of factual answer recorded and used for the analysis
Explanation:
I hope this will help you :)
an inclined plane makes work easier by increasing the distance and decreasing the____.
Answer:
force
Explanation:
Answer:
force
Explanation:
Why does the pattern of colors repeat in a thin soap film? Please use 2 content related sentences. (ref: p.522-530)
Answer: The pattern of colors that repeat in a thin soap film is a result of the interference of light waves reflecting off the front and back surfaces of the film. The specific colors seen are determined by the thickness of the film, with different wavelengths of light being reflected or refracted at different angles, creating the characteristic rainbow pattern.
why doesn't the skateboarder rolls as high up the ramp each time you go down the ramp
Answer:
Some of her energy transforms to thermal energy.
Explanation: