Answer:
1 * 10^-7 [J]
Explanation:
To solve this problem we must use dimensional analysis.
1 ergos [erg] is equal to 1 * 10^-7 Joules [J]
[tex]1[erg]*\frac{1*10^{-7} }{1}*[\frac{J}{erg} ] \\= 1*10^{-7}[J][/tex]
Which energy conversion takes place when a solar cell is used to light a street lamp?
A.
solar energy → light energy
B.
solar energy → electric energy → light and heat energy
C.
solar energy → light and heat energy
D.
heat energy → light energy
E.
heat energy → light energy → electric energy
Answer:
B. solar energy → electric energy → light and heat energy
Explanation:
The solar energy received from the solar rays is transformed into electrical energy, through a photovoltaic process that is part of the solar panel and other elements. Then the electric energy generates currents that pass through the electrical circuit and this transformation generates light in electric bulbs. Since energy conversion processes are never 100% efficient for the electric energy in the bulb is transformed into heat, for that reason the electric bulb emits part of its energy in the form of light and heat.
At an altitude of 6679 km above the center of the Earth the International space station can complete one orbit and 1.5 hours determine the average speed of the ISS explain why you should calculate speed in this case and not velocity
If the mass of block B is 2kg, the gravitational force exerted on block B is most nearly which of the following?
0.2N
2N
20N
P.S The acceleration is 10m/s^2 but I have no idea how to get that, so could someone explain that to me.
Answer:
20 N.
Explanation:
The following data were obtained from the question:
Mass of block B (m) = 2 Kg
Acceleration due to gravity (g) = 10 m/s²
Gravitational force (F) =..?
Force is simply defined as the product of mass and acceleration i.e
Force = mass (m) × acceleration (a)
F = ma
Thus, we can say that the gravitational force on block B will be the product of the mass of block B and acceleration due to gravity i.e
Gravitational force (F) = mass of block B (m) × acceleration due to gravity (g)
F = mg
Mass of block B (m) = 2 Kg
Acceleration due to gravity (g) = 10 m/s²
Gravitational force (F) =..?
F = mg
F = 2 × 10
F = 20 N
The, the gravitational force exerted on block B is 20 N
Gravitational force exerted on block B is 20 N
Given that;
Mass of block = 2 kg
Acceleration = 10 m/s²
Find:
Gravitational force exerted on block B
Computation:
Gravitational force = ma
Gravitational force exerted on block B = Mass of block × Acceleration
Gravitational force exerted on block B = 2 × 10
Gravitational force exerted on block B = 20 N
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A triangle has a base of 10 cm. Its other two sides are both 13 cm long
Calculate the area of the triangle
Answer:
1/2 base height answer is 65 cm
10 points
You will need to refer to your periodic table to answer this
question.Which of these groups (columns) in the periodic table is made
up primarily of elements that are gases at room temperature?"
Group 1
Group 2
O Group 17
O Group 18
Answer:Hhvhvhvgvhvh
Explanation:
Which of the following reactions best illustrates the Law of Conservation of Mass?
A. H2O2 → H2O + O2
B. Na + CuS → Na2S + 2 Cu
C. K + AgCl → KCl + Ag
D. NaOH + 2 HCl → NaCl + H2O
Answer:
A
Explanation:
Mass does not change no matter what!!! In this instence it is all still there. hope it helps
In the reaction, K + AgCl → KCl + Ag, the masses are constant before and after the reaction. Hence, this illustrates the Law of Conservation of Mass. So, option (C) is correct.
The given problem is based on the chemical analysis for the law of conservation of mass. As per the law of conservation of mass, "In a chemical reaction, the mass of reactant can neither be created, nor be destroyed. But it can change its phase".
In the chemical reaction,
K + AgCl → KCl + Ag
Clearly in the potassium and silver chloride, the mass of reactant (potassium and silver chloride) remains same (or constant) while forming a product (potassium chloride and Silver). Which is not observed in other given chemical reactions.
Thus, we can conclude that in the reaction, K + AgCl → KCl + Ag, the masses are constant before and after the reaction. Hence, this illustrates the Law of Conservation of Mass. So, option (C) is correct.
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A student pulls a rope attached to a box of books and moves the box down the hall. The student pulls with a force of 185 N and an angle of 21.0° above the horizontal. The box has a mass of 45.0 kg and the coefficient of kinetic friction between the box and the floor is 0.27. Find the acceleration of the box.
1.2 m/s2
4.1 m/s2
2.8 m/s2
3.8 m/s2
Answer:
wow that's a lot well.....
urgent please help. it’s kinematic equations
Answer:
Explanation:
Key Points
The four kinematic equations involve five kinematic variables:
Each equation contains only four of the five variables and has a different one missing.
It is important to choose the equation that contains the three known variables and one unknown variable for each specific situation.
Answer:
A:
The displacement is 0 meters because it just moved back to its original position.
The distance traveled(in meters) is just the speed times the time, which is 18 m/s * 3600 s = 64800 meters.
B:
In this case, the displacement and the distance traveled are the same because the object didn't change direction.
The distance traveled(in meters) and the displacement is just the speed times the time, which is 16 m/s * 15 s = 240 meters.
C:
In this case, the displacement and the distance traveled are the same because the object didn't change direction.
We can use the equation (Final Velocity)^2 = (Initial Velocity)^2 + 2*Acceleration*Distance.
Now we can plug the known values: (5)^2 = (20)^2 + 2*(-4)*d, and now we solve for d: 25 = 400 + -8d -> -375 = -8d -> d = 46.875 meters.
D:
Again, in this case, the displacement and the distance traveled are the same because the object didn't change direction.
We can use the equation Distance = (Initial Velocity) * (Time) + 1/2 * (Acceleration) * (Time)^2.
Plugging in the values we know, we get d = 0*20 + 1/2*3.7*20^2 -> d = 740 meters.
E:
Again, in this case, the displacement and the distance traveled are the same because the object didn't change direction.
We can use the equation Distance = (Initial Velocity) * (Time) + 1/2 * (Acceleration) * (Time)^2.
Plugging in the values we know, we get d = 12*26 + 1/2*1.5*26^2 -> d = 819 meters.
If you have further questions please don't hesitate to ask.
I really hoped this helped you, and if it did, could you please consider giving me a brainliest? :)
What two types of energy does a rock have as it rolls down a hill? (APEX)
A. Sound energy
B. Nuclear energy
C. Potential energy
D. Kinetic energy
E. Magnetic energy
Answer:
C. Potential energy
D. Kinetic energy
Explanation:
Billy Sue is speeding down a country road in his new monster truck at a constant 32 m/s when he goes over a hill and spots a cow standing in the middle of the road. The cow is 45m in front of him. If he reacts immediately upon viewing the cow, and his braking acceleration is 20 m/s 2 , can he stop in time to avoid hitting the cow?
Answer:
He won't stop on time, the distance his car traveled during the braking is greater than 45 m.
Explanation:
Given;
initial velocity of Billy's car, u = 32 m/s
his braking acceleration, -a = 20 m/s
his final velocity when the car stops, v = 0
Apply the following kinematic equation to determine the distance traveled by Billy's car during the braking acceleration;
v² = u² + 2as
0 = 32² + (2 x -9.8)s
0 = 32² - 19.6s
19.6s = 32²
s = (32²) / (19.6)
s = 52.25 m
The distance traveled is greater than 45 m, thus Billy's car will hit the cow.
A flowerpot exerts a force of 20 N on a table.
Which force prevents the flowerpot from pushing through the table and landing on the
ground?
• a 20 N force of Earth pushing up on the flowerpot
• a 20 N force of the table pushing up on the flowerpot
• a 40 N force of Earth pushing up on the flowerpot
• a 40 N force of the table pushing up on the flowerpot
Answer:
a 20 N force of the table pushing up on the flowerpot
Explanation:
According to the Newton's third law of motion every force has equal and opposite reaction force.
Here in this case flower pot is exerting a force of 20N on the table so table will also react with the same amount of force (20N) but in the opposite direction of the action force.
which of the following is the best answer for the Earth revolving around the Sun instead of crashing into it?
You jump off a cliff and accelerate at 9.8 m/s ^ 2 due to gravity. How far do you fall in 4.0 seconds?
Answer:
According to my calculations you will fall untill you are stopped by an equal force
A pillow is thrown downward with an initial speed of 6m/s after 4 seconds, the pillow velocity is what?
Answer:
4 seconds is -45.2 m/s.
Explanation:
PLEASE HELP ME
A fire damaged several of
the apartments next to the one where the fire started.
Damage may have been reduced by controlling the transfer of thermal energy
with the use of better -
A. conduction
B. convection
C. insulation
D. radiation
Answer:
im pretty sure it is C. Insulation
Explanation:
because it says reduced, and basically ur insulating the fire.
Which technology is used to service space vehicles and other equipment?
space probe
space station
space satellite
space observatory
The answer isn’t probe. I believe it’s space station. Someone please answer
Answer:
You're correct it is space station
Explanation:
Did the quiz
The ability of a material to be drawn into a thin wire is called ___________________________.
YALL PLEASE HELP
Answer:
Explanation:
The ability of a material to be drawn into a thin wire is called ductility
Carl buys 48 boxes of soda. how many cans did Carl buy if each box holds 12 cans of soda?
Answer:
576
Explanation:
48*12=576
hope this helps
Describe one of the customs that Darwin had to participate in at sea as new sailor.
Answer: Describe one of the customs that Darwin had to participate in at sea as new sailor.
Explanation: At 26, Darwin had come to the archipelago, which straddles the Equator some 600 ... Darwin's revolutionary theory was that new species arise naturally, by a ... What was supposed to be a 6-hour excursion became a 51-hour nightmare as we ... Darwin, who ventured onto several smaller ones, were like “a sea petrified
What is the process used to separate the mixture of flour and rice?
A student is using a sound machine to produce the sound waves presented in the data table below. How could the student manipulate the sounds to make them match in pitch but make sound wave #1 louder than sound wave #2?
Answer: Make the frequency higher for number 1 and have the same amplitude.
Explanation: Wavelength and frequency are directly related so if you change one of those then you can't keep the other one the same. You would need to raise the frequency which would make 1 louder and keep amplitude the same for both so that 1 is louder.
To make the sounds match in pitch while making sound wave 1 louder than sound wave 2 : Increase the frequency for wave #1 while setting their amplitudes at the same value
The wavelength of a sound wave is inversely proportional to its frequency therefore when the frequency of wave 1 is increased its wavelength decreases with equal proportion.
Since the increase in frequency results to a decrease in wavelength. therefore to make wave 1 louder, both waves we will have to set the amplitude values of the waves at the same amplitude.
Hence we can conclude that to make the sounds match in pitch while making sound wave 1 louder than sound wave 2 ; Increase the frequency for wave #1 while setting their amplitudes at the same value.
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PLEASE SOMEONE ANSWER!!! thank you so so so much!!!!
Answer:
As much I know the gravity on moon is 1.62m/s२.
#1 What materials is each part of the flashlight made of? (A flashlight will include wires,a light bulb,a lens, a reflector ,and an exterior casing.) #2 For each part,why was that material chosen? #3 For each part,would material have worked as well?
Explanation:
Question 1
1.The wires are made of conducting materials e.g copper
2. A light bulb is made of filament material e.g tungsten with gases enclosed in a glass material
3.The lens is made of transparent glass material
4 The reflector is made of plastic with silver lining
5. The exterior casing of most flash lights are made of plastic
Question 2.
1.Copper is used to conduct electric current from the battery to the bulb
2.The tungsten filament ignite the gases and causes it to glow
3. The lens covers the lamp on your flashlight so that the glass on the lamp
/bulbs does not get broken.
4.The reflector redirects the light rays from the lamp, creating a steady beam of light, which is the light you see emitting from the flashlight.
5. The exterior cases houses the entire assembly and makes the flash light handy for use
How much force would you have to apply
to a 16kg box with in order to make it
accelerate at 4m/s??
Answer:
64
Explanation:
in the game of croquet, a player moves a ball around a course by striking the ball with a mallet all the players take turns striking there own balls the photo shows some kind of result of one kind of play.
what most likely causes the motion of the purple ball in the photo.
Answer:Kinetic energy from the mallet is transformed first to the orange ball and then to the purple ball.
Explanation:
The speed of sound is 343 m/s in air at room temperature. What is the wavelength of a B-flat musical note that has a frequency of 466 HZ? What would happen to the wave length if you increased the frequency to 932 Hz?
Answer:
1398
Explanation:
sorry if imam wrong
Can someone help me please step by step
Answer:
12 1/2 cups
Explanation:
first, figure out how many times twelve goes into 60 (5 times)
then multiply 2.5 by 5 for the correct serving size
2.5×5=12.5
There are many forms of energy. All energy falls into one of two categories, either potential or kinetic energy. A Newton's Cradle, with the pendulums at different points along its path, involves kinetic energy being transformed into potential energy.
Use scientific reasoning to explain in detail how the kinetic is transformed into potential energy in the Newton's Cradle example. Be sure to explain the differences and similarities between kinetic and potential energy in your response.
Answer:
the difference is when object is in rest its potential when object is in motion its kenitic energy
The detail how the kinetic is transformed into potential energy in the Newton's Cradle example is discussed in the answer.
What is Newton's Cradle example?The Newton's Cradle is an apparatus that uses spheres in motion to show how momentum and energy are conserved. One of the stationary spheres at the end is lifted and released, striking them and sending a force through them that forces the final sphere higher. In order to recreate the effect in the other way, the final sphere swings back and collides with the virtually stationary spheres.
In Newton's Cradle, one or many balls have to rise at the staring. Tis provides potential energy. When the balls fall, this potential energy transfers into kinetic energy. When balls of Newton's Cradle collides, kinetic energy transfers from one ball to another, that's why they moves simultaneously.
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What is an ocean ridge?
If your just asking what it means, its a mid-ocean ridge or mid-oceanic ridge is an underwater mountain range, formed by plate tectonics.
i.the heater has power output of 3kw
What does the 'k' stand for in 'kW'?
How much energy (in joules) does the heater deliver in one second?
ii.
How much energy (in joules) does the heater deliver in 7 minutes?
Answer:
2
cos
(
x
)
−
√
3
=
0
2
cos
(
x
)
-
3
=
0
5
3
y
+
5
2
=
5
5
3
y
+
5
2
=
5
x
−
4
≥
0
Explanation:hopefully this helps you