Answer:
reviewing the statement we can say that it is FALSE
Explanation:
The Doppler effect is the change in the perceived frequency of a sound wave by the RELATIVE MOTION of the source and the observer.
This effect is very useful for finding the speed of an object.
When reviewing the statement we can say that it is FALSE
How are the ingredients in a mixture of iron filings and sand affected by being combined?
answer choices
1. Both the iron filings and the sand maintain their original physical properties when combined.
2. The physical properties of the sand change but those of the iron filings do not.
3. Neither the iron filings nor the sand maintain their original physical properties when combined.
4. The physical properties of the iron filings change but those of the sand do not.
Answer: Its A. Both the iron filings and the sand maintain their original physical properties when combined.
Explanation:
how much energy is needed to melt 1.25 kg of water at its melting point?
2830 kj
5.23 kj
0 kj
416 kj
Answer:
416 kj
Explanation:
hope it helps
Answer:
416 kj
Explanation:
For this particular problem, we are not dealing with a temperature change, rather, we are dealing with a scenario in which we are melting ice. Hence, we need to use the delta H fusion equation:
q=m⋅ΔHfus
Hope that I could help.
What type of friction must
these boaters overcome to
move their boat through the
water?
A. Static
B. Fluid
C. Sliding
Please help only have a short amount of time left!
Which of the meters illustrated will display the greatest amount of current?
Answer:
I think all will display the same value
Explanation:
Sorry if this is wrong
Answer:
I think it's option a. this is because,it has longer conductivity.
this might be wrong. I am just in jss2 but I read physics
If the distance between 2 charged particles is double, the force between them changes by a factor of?
Answer:
See explanation
Explanation:
Given that;
q1 and q2 are the magnitudes of the two charges while r1 is the distance between the charges.
F1 =kq1q2/r1^2
Then,
F2 = kq1q2/(2r1)^2
F2 = kq1q2/4r1^2
So,
F2 = 1/4 F1
The force between the charges changes by a factor of 1/4.
According to Jean Piaget, in what stage of cognitive development are children able to understand conservation tasks?
Answer:
Preoperational
Explanation:
According to Piaget's theory of cognitive development, the preoperational stage is the second stage. This stage includes children between the age group of 2 to 7 years. Children can understand conservation tasks and learn to manipulate various symbols during this stage.
So, the answer is the preoperational stage.
Answer:
B Preoperational
Explanation:
This is the answer the person above is correct!
This is for edge 2021/2022
Hope this helps!!
10. Bites of some animals can cause
sprain
tetanus
rables
Answer:
an infection, including bacterial and rabies infections.
broken animal teeth embedded in your wound.
foreign objects embedded in your wound.
possible nerve and blood vessel damage.
Calculate the charge that flows through the cell in 1 minute. Each filament lamp has a power of 3 W and a resistance of 12 Ω
Answer:
24 Coulumbs
Explanation:
Given data
time= 1 minute= 6 seconds
P=2 W
R= 12 ohm
We know that
P= I^2R
P/R= I^2
2/12= I^2
I^2= 0.166
I= √0.166
I= 0.4 amps
We know also that
Q= It
substitute
Q= 0.4*60
Q= 24 Columbs
Hence the charge is 24 Coulumbs
Answer:
30C
Explanation:
its basically how the other guy did it but he worked it out with 2W instead of 3W so he got it wrong so its 30C and not 24C
what is fundamental interval
The difference between the values recorded in the thermometer at two fixed points known as Fundamental interval.
weight is derived from which quantity?
Answer:
weight is derived from kilograms(kg)
Projectile Motion
a. Identify the variables (givens and unknown.) Remember to include the units.
B. Which kinematic formula should you use to solve?
C. Solve the problems.
An egg is thrown horizontally off the roof.
Which is 70 meters high, with an
initial velocity of 5.5 m/s. How long does it take to hit the ground? How far
does it go in the x direction?
3 variable
Variable Chart Given and Unknown?
PLEASE HELP ME FAST ITS 25 POINTS
Answer:thx
Explanation:
a sound effect balloon is
Answer:
Hey mate...
Explanation:
This is ur answer...
A balloon sound effect is pop or bang....
hope it helps you,
Follow me
Answer:
Popping sound
Explanation:
It gives a pop sound when it blows off
I WILL MARK BRAINLIEST IF CORRECT!!!!!!
A baseball player throws a ball giving it a change in momentum of 6.5 kg*m/s over 90 ms. What is the magnitude of the ball?
Answer:
72.2N
Explanation:
6.5/0.09=72.2
A woman drives a golf ball off the tee to a speed of 28 m/s. The mass of the ball is 45 g and tIf the angle of the flight was initially 20ofrom the horizontal, how far would the ball go before it landed? (51 m) he time of contact was 6.0 ms.
Answer:
456
Explanation:
impulse = Force x (time of contact)
this isn't really much information but hope this helps !: )
The atmospheric pressure is 1 ATM.What does it mean?
Answer: the atmospheric pressure is generally expressed in terms of the height of the mercury column.at normal temperature and pressure, the barometric height is 760mm at sea level which is taken as one atmosphere. thus atmospheric pressure is also expressed in a unit atmosphere where 1 atm= 0.76m of hg. 9
The foghorn blast from a big ship is a very loud sound . What is the best example of a very high pitched sound
Answer:
Whistle
Explanation:
High pitched sound is a type of sound that has a high-frequency sound wave or outstanding pitch than other sounds in the area of observation.
There are various examples of high pitch sound, some of them include:
Nails scratching on the blackboard, School bell, Rubber shoes squeaking against a basketball court, Fireworks.
The most common high pitch sound and usually the best example is WHISTLE.
What causes seafloor spreading, subduction, and the movement of
tectonic plates?
Answer:
Subduction happens where tectonic plates crash into each other instead of spreading apart. At subduction zones, the edge of the denser plate subducts, or slides, beneath the less-dense one. The denser lithospheric material then melts back into the Earth's mantle. Seafloor spreading creates new crust.
Explanation:
hope it helps i do not know if that is the kind of answer you wanted or not but i tried
7. 10 Kg of water at 90°C is cooled by mixing 20kg of water at 20°C. What
is the final temperature of the mixture?
(3850
Answer:
Please mark me as Brilliant
Explanation:
I shall solve both one by one
Case 1: 1 kg of water at 10° C
Let the final temperature be T° C , where T°C < 30°C.
Heat give out by 4.4 kg of water at 30° C to come down to T°C = 4400 g × 1 calorie/g/°C × (30- T)° C = (4400× 30 - 4400 T) calorie
Heat gained to raise temperature of 1kg of water at 10° to T° = 1000 g × 1 calorie/g/°C × (T -10)° C = 1000 T - 10,000) calorie
Heat gained = Heat lost
1000 T - 10,000 = 1,32,000 - 4400 T; ==> 54 00T = 1.42,000; T = 1,42,000/5400 = 26.3° C.
In case it is 1 kg of water at 10° C mixed with 4.4 kg of water at 30° C, the final temperature of the mixture would be T = 26.3° C.
Case 2: 1 kg of ice.
Ice is essentially at its melting point/freezing point ie at 0° C.
Let the temperature of mixture = T° C
Heat required to melt 1 kg (=1000 g of ice) at 0° C to water at 0° C = 1000 g × 80 calorie/g = 80,000 calorie
Heat require to raise temperature of 1000 g of water at 0° C to water at T° C = 1000g × 1 calorie/g/°C× (T -0)° C = 1000 T calorie
Heat gained = 80,000 + 1000 T
Heat lost by 4.4 kg of water at 30° C to cool to T° C = 4400 g × 1 calorie/g /° C × ( 30 - T)° C = 1,32,000 - 4400 T
Heat gained = Heat lost
80,000 + 1,000 T = 1,32,000 -4400 T
5400 T = 52,000/5400; ==> T = 9.63°C.
In case it is ice, the temperature of the mixture is T = 9.63° C.
Added: around 2 pm
Identify the process shown in the given picture A and B and differentiate between the two processes.
please give answer fast
30 points, brainiest, high school physics problem, please help.
Each lunar cycle has one full moon, in which the relative positions of Earth, the sun, and the moon form in a straight line
Complete Question:
Each lunar cycle has one full moon, in which the relative positions of Earth, the sun, and the moon form in a straight line. Which list represents the position of Earth, the sun, and the moon during a full moon?
Group of answer choices.
A. Earth, sun, moon
B. sun, moon, Earth
C. moon, sun, Earth
D. sun, Earth, moon
Answer:
D. sun, Earth, moon
Explanation:
A lunar eclipse is a phenomenon that occurs when the Earth comes between the Moon and the Sun thereby causing it to cover the Moon with its shadow.
Simply stated, lunar eclipse takes place when the Moon passes or moves through the Earth's shadow thereby blocking any ray of sunlight from reaching the Moon. Thus, the full moon appears deep red (blood moon).
Also, a lunar eclipse would occur only when the Sun, Earth, and Moon are closely aligned to form a straight line known as the syzygy.
There are three (3) types of lunar eclipse and these are;
1. Total lunar eclipse.
2. Partial lunar eclipse.
3. Penumbra lunar eclipse.
Each lunar cycle has one full moon, in which the relative positions of Earth, the sun, and the moon form in a straight line. Thus, the list which represents the position of Earth, the sun, and the moon during a full moon is sun, Earth, and moon
Scattering occurs when a material emits light, and then re-emits the light in different directions.
true or false
What voltage will produce 3 A through a circuit that has 15 ohms of resistance?
GIVEN: FORMULA:
REQUIRED: SUBSTITUTE & SOLVE:
A. 45 V
B. 5 V
C. 45 A
D. 0.2 V
Answer:
formual is
V = IR
V = 3*15
V= 45 V
hope it helps
What does mosquito larvae breathe out of
Answer:
Mosquito Larve commonly called wigglers live in water from 4 to 14 days depending on water temperature
A 2kg watermelon is dropped from a 4m tall roof a) use the appropriate kinematic equations to determine the instantaneous velocity of the watermelon as its strikes the ground below?
Answer:
8.85m/s
Explanation:
The potential energy the watermelon held before dropping is Ep=mgh=2*9.8*4=78.4J.
When it strikes the ground, all of its Ep will transfer into Ek, so 1/2*m*v^2=78.4.
We already knew that m=2, so insert that in, we will get the V^2=78.4 m/s, V=8.85 m/s
some sports or activities you can do to improve your overall health and how physical activity can improve your
physical and emotional health.
Answer:
some sports activities you can yo to improve your over all heath is running and how it can improve your emotional and physical heath is that it will get you heart beat up which will help you lose weight and make you feel better and how it can help your emotional health is that it can help you feel less stress mad angry and a bunch of other things
Explanation:
( the part were it says it will help lose weight is optional
If Speed = Distance / Time, then a marble rolling 49 cm in 7 seconds is
moving at
343 cm/s
.142 cm/s
7 cm/s
not moving at all.
Distance = 49
Time = 7
49/7 = 7
7 CM/S
What is the best definition of solar radiation?(giving brainliest)
-Storing of energy in Earth's oceans
-Energy from the Sun that reaches Earth
-Moisture and heat energy in the atmosphere
-Increased evaporation due to warm water
ANSWER AND I WILL BUY A CAR
If you were to Push on a brick wall with 100 Newtons of force, how much would the wall push back towards you?
Please help me : What braking force is needed to stop a 1,000-kilogram car moving at 10m/s on a time of 1 seconds?