Concave mirror is used to make to solar heater because it can converge light of sun in a small area
hope it helps
Newton's First Law is:
Question 1 options:
Force= Mass x Acceleration
An object in motion will stay in motion unless acted upon.
For every action there is a reaction.
Answer:
it's option 2
Explanation:
Newton's first law states that, if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force
caves are formed from?
Answer:
caves are mainly formed by water or in some other cases limestone.
Please help I’ll give 15 points
Answer:
note duration are measured in beats
5 WILL PAY YOU CASH APP IF YOU ANSWER
Which sentence supports this claim: Training their dogs to provide pet therapy is a fast-growing trend among dog-owners today.
The main job of a pet therapy dog is to allow people it doesn’t know to pet it and play with it.
In 2010, about 24,000 therapy dogs were registered with Therapy Dogs International.
The first known therapy dog was a Yorkshire Terrier named Smokey who comforted wounded soldiers.
Dogs make good therapy pets because they usually crave lots of attention and affection.
Answer:
Dogs make good therapy pets because they usually crave lots of attention and affection.
Answer: In 2010, about 24,000 therapy dogs were registered with Therapy Dogs International
Explanation:
Z. solid
Y molten
X. solid and liquid
W. solid, rocky
What is the name of the layer of the Earth that is labeled with the letter X?
OA
mantle
ОВ.
outer core
OC. inner core
OD. Crust
Answer:
mantle
Explanation:
The mantle has properties of solids only.
How long would it take for a car to travel 500m if it was moving at a constant speed of 50.0 km/h?
can somebody definee newton1 word to word pls
Answer:
One newton is a unit of force equal to the force needed to move a one kilogram mass by one meter per second per second. Word originsThis word is named for Sir Isaac Newton (1642-1727), the great English mathematician and physicist who discovered gravity.
Explanation:
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A 0.5 kg mango falls 22 m from a tree, what is the potential energy of the mango?
A book that weighs 0.35 kilograms is kept on a shelf that’s 2.0 meters above the ground. A picture frame that weighs 0.5 kilograms will have the same gravitational potential energy as the book when it’s raised to a height of ____
meters.
(Use PE = m × g × h, where g = 9.8 N/kg. )
Answer:
E p = m · g · h
E p ( book ) = 0.35 kg · 9.8 m/s² · 2 m = 6.86 J
E p ( picture frame ) = 6.86 J
( same gravitational potential energy as the book )
6.86 = 0.5 · 9.8 · h
6.86 = 4.9 h
h = 6.86 : 4.9
h = 1.4 m
Answer: 1.4 M
a student is supplied with the following pieces of equipment:
• a small metal ball
• table tennis ball
• metre rule
• stop clock
• calculator
• light gate
• data logger
describe how the student can use this, or other additional equipment, to determine an accurate value for the acceleration of free fall (g). the student need not use all the equipment. show clearly what measurements should be taken and how the students should use these in determining (g). describe one source of error and how this might affect the value of (g).
(6 marks/year9/gcse)
Explanation:
Use a meter stick, small metal ball, stopwatch, calculator.
Have the students mark off a vetrtical distance from which to drop the metal ball. Ready the stopwatch, and start when the object is dropped and stop when the object contact the ground. Repeat 5 times and average the stopwatch times.
Now, use the formula d=vo+(1/2)at^2
There's no initial velocity, so d=(1/2)at^2
We know time and distance, so we can solve for a, acceleration.
2d=at^2
(2d)/(t^2)=a
Now, input the numbers gathered in the experiment in meters and seconds.
One source of error is human error (stopwatch timing)
Air resistance (although pretty negligible)
How to calculate the period of a wave?
Answer:
The wave velocity and the wavelength are related to the wave's frequency and period by vw=λT or vw=fλ. The time for one complete wave cycle is the period T. The number of waves per unit time is the frequency ƒ. The wave frequency and the period are inversely related to one another.
Explanation:
T = 1 / f is the formula to calculate the period of a wave.
What is the period of the wave?The time it takes for two successive crests (one wavelength) to pass a specified point. The wave period is often referenced in seconds.
The calculation of period of wave is:
The formula for period is T = 1 / f ,
where "T" is period – the time it takes for one cycle to complete, and "f" is frequency.
To get period from frequency, first convert frequency from Hertz to 1/s.
Period refers to the time for something to happen and is measured in seconds/cycle.
In this case, there are 11 seconds per 33 vibrational cycles.
Thus the period is (11 s) / (33 cycles) = 0.33 seconds.
Therefore,
T = 1 / f is the formula to calculate the period of a wave.
Learn more about period of the wave here:
https://brainly.com/question/14588679
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A burning candle is placed 20 cm in front of a concave mirror of focal length 10cm. find the nature and position of the image formed
Answer:
:)
Explanation:
u = 20 cm
f = 10 cm
Object is at centre of curvature
So , image will be formed at centre of curvature and the nature will be real and inverted
Image will be of same size as of object
Last question guys help
Answer:
I think the first reply me if I'm wrong sorry hehe
what are the effects of ultraviolet sun rays????
Answer: UV rays, either from the sun or from artificial sources like tanning beds, can cause sunburn. Exposure to UV rays can cause premature aging of the skin and signs of sun damage such as wrinkles, leathery skin, liver spots, actinic keratosis, and solar elastosis. UV rays can also cause eye problems.
Explanation: Uv means ultraviolet
1. Infer how the height of the lines on a seismograph change with an increase in
earthquake magnitude.
Answer:
his movement is proportional to the intensity of the earthquake,
Explanation:
An earthquake is a record of the intensity of an earthquake as a function of time.
Where the intensity is plotted on the y-axis, which corresponds to the vertical movement of the detector, this movement is proportional to the intensity of the earthquake, therefore the intensity increases the amplitude of the oscillation increases.
And the in x corresponds to time
The lines on a seismograph indicate the magnitude of an earthquake. The lines from the seismograph are indicative of seismic waves that the seismograph has recorded.
When there is a straight line on the seismograph, it means there are no earthquakes. However, if the lines become wiggly, it means that the ground is shaking.
How Earthquake Magnitude is measuredThe magnitude of the earthquake is determined from the logarithm of the amplitude of waves recorded by the seismographs.
In order to understand the amplitude of waves, you'd have to be versed with the anatomy of waves. Once the logarithm is computed (after adjustments for the distance between the seismographs and the epicenter of the earthquakes), it is checked against the Richter Magnitude Scale in order to place the earthquake in a category.
For example, an earthquake may be considered moderate if the adjusted amplitude of the waves recorded on the seismograph records 5.3 on the Richter Scale. On the other hand, a rating of 6.3 is considered a strong earthquake.
See the link below for the Anatomy of Waves:
https://brainly.com/question/15663649
See the link below for more about Readings from the Richter Scale:
https://brainly.com/question/922783
PLEASE HELP!!! GIVING BRAINLIEST!! ill also answer questions that you have posted if you answer this correctly!!!! (70pts)
Answer:
Rolling = Riding a bicycle on a sidewalk
Static = Pushing a car unsuccessfully
Sliding = Pulling your computer across the bed
Fluid = Throwing a soccer ball to your friend
Answer: Rolling = Riding a bicycle on a sidewalk
Static = Pushing a car unsuccessfully
Sliding = Pulling your computer across the bed
Fluid = Throwing a soccer ball to your friend
Explanation:
What is happening in this image ?
Answer:
A mirror is scattering light.
6. A suitcase weighing 120 N sits on a counter 1.8 m high
in the airport. How much gravitational potential
energy does it have?
Answer:
216 J
Explanation:
h = 1.8
a = 9.8
m = 12.2
GPE = HAM = 216
The gravitational potential energy of a suitcase weighing 120 N sits on a counter 1.8 m high in the airport is 216 Joules.
What is Gravitational Potential Energy?Gravitational potential energy is the energy which is present inside the body of an object which is at rest. This energy is transformed into kinetic energy as soon as the object changes its state of rest to motion.
The gravitational potential energy of an object can be calculated through the formula:
GPE = m × g × h
where, GPE = Gravitational Potential Energy,
m = mass of the object,
h = height covered by the object
w = m × g
where, w = weight of the object
So, the gravitational potential energy of the object is:
GPE = 120 × 1.8
GPE = 216 Joules
Therefore, the gravitational potential energy of the suitcase is 216 Joules.
Learn more about Potential energy here:
https://brainly.com/question/12807194
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Which of the following elements is the most chemically reactive?
A.Iron
B.Fluorine
C.Boron
D.Argon
Answer:
B) Fluorine
Explanation:
The most reactive element is fluorine, the first element in the halogen group. The most reactive metal is francium, the last alkali metal (and most expensive element).
Which of these waves probably has the largest wavelength?
Answer:
I think it's the last one
Explanation:
good luck
Answer: The last one...8 waves per second
Explanation:
One of the smallest planes ever flown was the Bumble Bee II, which had a mass of 180 kg. If the pilot’s mass was 70 kg, what was the velocity of both plane and pilot if their momentum was 20,800 kg∙m/s to the west?
Answer:
no one help you this is bad app
3) Magnets are used to separate steel cans from aluminum cans in recycling plants. How can
they be used for this?
(Will give brainliest if it's a proper answer)
Answer:
Since steel contains iron (a magnetic metal), the magnets will attract the steel cans since aluminum is not magnetic. This is used to separate the steel cans from the aluminum cans so they can be recycled separately.
A uniform meter rule is balanced by 80N and 20N from its ends. Find the position of its pivot from the 20N end. Show your working please
Answer:
80 cm
Explanation:
From the diagram attached,
Sum of clockwise moment = sum of anticlockwise
ΣACW = ΣCW
20x = 80(100-x)
Solve for x
20x = 8000-80x
20x+8x = 8000
100x = 8000
x = 8000/100
x = 80 cm.
The position of its pivot from the 20 N end is 80 cm.
I WILL MARK BRAINLIEST IF CORRECT!!!
Answer:
I'm fairly sure that the answer is "100 m/s"
Explanation:
Fnet=ma
a=Fnet/m
a=4 N / 0.040 kg
a=100 m/s
please check my work before you submit, i don't wanna let cha down :)
resistors - defibrillator - resistance - increases - energy - decreases -capacitors.
1_______________ is the difficulty of passing electric current through a conductor. It 2_______________ as the wire becomes longer and 3_________________ as the wire becomes wider.
4________________ are electric devices used to transform energy into heat or light.
5________________ are similar to batteries. They can store 6_______________. But they charge up quicker and can discharge the all the energy faster than a second. A 7_________________ is an example of a capacitor function.
Answer:
1. Resistance.
2. Decreases.
3. Increases.
4. Defibrillator.
5. Capacitors.
6. Energy.
7. Resistor.
Explanation:
Resistance is the difficulty of passing electric current through a conductor. It increases as the wire becomes longer and decreases as the wire becomes wider.
Defibrillator are electric devices used to transform energy into heat or light.
Capacitors are similar to batteries. They can store energy. But they charge up quicker and can discharge all the the energy faster than a second. A resistor is an example of a capacitor function.
Someone fires a 0.04 kg bullet at a block of wood that has a mass of 0.5 kg. (The block of wood is sitting on a frictionless surface, so it moves freely when the bullet hits it). The wood block is initially at rest. The bullet is traveling 300 m/s when it hits the wood block and sticks inside it. Now the bullet and the wood block move together as one object. How fast are they traveling?
Answer:
22.22m/s
Explanation:
The momentum before a collision = momentum after collision so...
work out the momentum of the first object (the bullet)
its p = mv
0.04 kg × 300 m/s = 0.54 kg × v
rearrange this to find v which is 0.04 x 300 = 12
so 12 = 0.54 x v
12/0.5 = v
v = 22.22m/s
hope this helps!
A test charge of 0.16 C experiences a force of 0.04 N. What is the electric field strength?
Answer:charge and a 0.04 C charge are separated by a distance of 3.0 m. At what position between the two charges would a test charge experience an electric field intensity of zero? Answers 1. The magnitude of the electric field
Explanation:
Series Circuits and Parallel Circuits
How similar?
How different?
Answer:
series circuits have a line of several electrical patterns parallel curcuits are seperated
Explanation:
hope this helps..
A toddler pushed a 4-kg toy car at a constant speed against a ground frictional force of 8 N.
Then, the toddler pushed the toy car with the same force on a marble ground with no frictional
force against the toy car, what is the acceleration (in m/s2) of the toy car?
A. 0
B. 1
C. 2
D. 4
Please help me please and you will get the brainlist
Answer:
4. Force = 178.6 Newton.
5. Acceleration = 2.28 m/s².
6. Force = 178.6 Newton.
Explanation:
4. Given the following data;
Acceleration = 3.8 m/s²
Mass = 47kg
Force = mass * acceleration
Force = 47 * 3.8
Force = 178.6 Newton.
5. Given the following data;
Force = 785N
Mass = 345kg
Acceleration = force/mass
Acceleration = 785/345
Acceleration = 2.28 m/s²
6. Given the following data;
Acceleration = 6m/s²
Force = 32N
Mass =force/acceleration
Mass = 32/6
Mass = 5.33 kilograms