Answer:
sorry i cant figure this out
Explanation:
An ambulance siren has a frequency of 650 Hz and is moving away from you at 35 m/s. What frequency will you perceive? Use 346 for the speed of sound.
590 Hz is the answer to the question
An ambulance siren has a frequency of 650 Hz and is moving away from you at 35 m/s. What frequency will you perceive? Use 346 for the speed of sound.
Answer:
59.71 Hz
Explanation:
Frequency: 650 Hz
Velocity: 35 m/s
Speed of sound: 346
f = f(v / v + speed of sound)
f = 650(35 / 35 + 346)
Evaluate and you would perceive a frequency of 59.71 Hz
How do two ions of the same element differ?
Answer:
In the electrons
Explanation:
The charge of ions of an element is determined by the amount of negative charged electrons are present. The protons and neutrons in the nucleus do not change.
Answer:
it is possible to use two icons in css content one below content 10px;color #99999
estion 3
What is the velocity of a 1120 kg car that has the momentum of 53,760 kg*m/s?
mentum
Answer:
Velocity = 48 m/s
Explanation:
Given:
Mass = 1,120 kg
Momentum = 53,760 kg(m/s)
Find:
Velocity
Computation:
Velocity = Momentum / Mass
Velocity = 53,760 / 1,120
Velocity = 48 m/s
PLS HELP WITH THIS DENSITY QUESTIONS AND WHEN SHOWING STEPS PLS USE GRASS
Calculate the density of aluminum if you have a piece of aluminum that has a volume of 48.9 cm³.When the piece is measured it is found to have a mass of 132 g.
A small amount of copper is found to have a mass of 27 g. Calculate the density of copper if the volume of the sample is 3.0 cm³.
The volume of a piece of iron is 65 cm³. If the piece of iron has a mass of 512 g. Calculate the density of the sample of iron.
A stick of cedar wood has a mass of 1.2 kg. It has a volume of 3243 cm³ . What is the density of cedar wood?
Zinc has a density of 7.14 g/cm³. If you are given 50 g of zinc calculate the volume of the sample.
A block of aluminum occupies a volume of 15.0 mL and weighs 40.5 g. What is its density?
Mercury metal is poured into a graduated cylinder that holds exactly 22.5 mL. The mercury used to fill the cylinder weighs 306.0 g. From this Information, calculate the density of mercury.
What volume of silver metal will weigh exactly 2500.0 g. The density of silver is 10.5 g/cm³
Answer:
Explanation:
Density = mass/volume
132g/(48.9 cm³) = 2.7 g/cm³
(27 g)/(3 cm³) = 9 g/cm³
512 g/(65 cm³) = 7.9 g/cm³
1.2 kg/(3243 cm³) cm³ = 1200 g/(3243 cm³) = 0.37 g/cm³
Someone please help me!!! Please explain and I will mark brainliest!!!
R=10+15+30
55 is the answer to the question
Rafe is placing his car on a lift to change the oil and oil filter. He needs to drive up the lift 1.5 meters and the lift raises his car 0.4 meters. What is the IMA (ideal mechanical advantage) of Rafe’s car lift?
Answer:
104 IMA
Explanation:
What do you know about muscular fitness activities?
Answer:
Examples of muscle-strengthening activities include:
lifting weights.
working with resistance bands.
heavy gardening, such as digging and shovelling.
climbing stairs.
hill walking.
cycling.
dance.
push-ups, sit-ups and squats.
Explanation:
Give reason.
1. Graph paper is used to measure the area of an irregular object.
6. A car accelerates from rest to 5m/s in 20 s. The force from the engine is 2000N. The force of air resistance and friction acting is 1000N. What is the cars mass?
Answer:
net force= 2000-1000=1000
a=v-u/t=5/20=1/4
m=?
m=f/a
=1000÷1/4=4000kg
what is first law of motion
Answer:
newton's first law hope this helped
Could someone pls help at #9?
Answer:
Substance 3 is the answer
What is the speed shown in the graph? which number do i start on?
Answer:
4 m/s
Explanation:
speed = distance/time
speed= 20/5 = 4
similarly for all no. the answer is constant,i.e. 4
Leigh Ann is learning about the differences between inherited traits and learned behaviors in organisms. For example, she knows that being able to read is learned while having straight or curly hair is inherited. How does a person inherit a trait such as hair texture?
A. Through the storage of extra fat during birth
B. Through DNA that is passed from parents to offspring
C. Through the breakdown of different proteins during birth
D. Through different viruses that are passed from parents to offspring
Answer:it the letter b I was just finished with this test
Explanation:
10 points to whoever answers!!!
What is the formula for work? What is the formula for power?
Answer:
power= work done /time.
Answer:
W = Force * distance
Power = W/ time
Explanation:
Is a hockey player moving at a constant velocity across frictionless ice, balance or unbalance
Answer:
Balanced
Explanation:
An unbalanced force will cause a change in the velocity, either the speed or direction, thus if the object is moving at a constant velocity that indicates that there is no acceleration or change in velocity which means that the forces are balanced.
4
(a) Which arrow shows the amplitude of the wave?
(1 mark)
Answer:
hmmm, where is the image?
but still let me tell you
Explanation:
amplitude of a wave is the maximum displacement of a particle from its rest position
so the arrow should be from the middle of the wave to the top of the crest or to the bottom trough,
from the middle
okay?
hope this helps, but be sure to add the image next time
A scientist heats a red powder. Upon heating, a liquid and a gas form.
Which type of substance is the red powder?
O A. anion
B. an isotope
O c. an element
O D. a compound
Answer:
Compound
Explanation:
5. What is crystallisation ? Describe the crystallisation of copper sulphate.
it is a process in which the structure in solution is in the form of crystal. crystallization of copper sulphate refers to the process in which copper sulphate is heated at minimum temperature.
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mark me as brainlist
We all have different strengths and weaknesses. How can you support others when they are better at something than you? How can you encourage others when you are better at a skill than they are?
Answer:
Tara zombix online magandang laro to
Which orgen in the urinary system regulates the water content and remove the toxic waste products from the blood?
Answer:
The Kidneys
Explanation:
The Kidneys remove the toxic stuff that you dont need anymore. Therefore the kidneys rather than the everything else removes blood and toxic waste.
On Earth, the gravitational field strength is 10 N/kg. Calculate E for a 4 kg bowling ball that is being
held 2 m above the ground
Answer:
People are exposed to sources of radiation in all aspects of everyday life. Radioactive sources can be very useful but need handling carefully to ensure safety.
Explanation:
10. CALCULATE: Find the amount of power used in each of the following examples. Show your calculations. a. You use a force of 10 N to move a box 100 m in 10 seconds. b. An athlete lifting weights does 900 J of work in 1 second. C. A truck does 30,000 J of work in 15 seconds. d. A fumiture mover uses a force of 150 N to push a large trunk 5 m across the floor in 5 seconds
Answer:
please find attached pdf
Explanation:
A scientist performed an investigation involving a reaction that produced AI, (SO )3. How many sulfur atoms are
represented in this formula?
Answer:
D
Explanation:
Because you add them all up it equals 9
In the Bohr model of the Hydrogen atom , the radius of the orbit from the nucleus increases with decreasing the quantum number n.
true or false?
Answer:
true
Explanation:
it is true as I guess
A object covers 900 km in 10 hours, calculate the speed of the object in km/h and m/s
Answer:
Speed = 90km/h
Speed= 150m/s
Answer:
speed is the distance divided by the time
so 900/10= 90km/h
to convert into meters per second
divide by 3.6
90/3.6=25m/s
Explanation:
5kg of copper ball and I kg of water are at the same temperature of 31 C. Which
substance loses more heat energy, when both of them are cooled upto 30°C
Answer:
r
Explanation:
24 How long does it take for the Earth to orbit the Sun?
A one day
B one week
C one month
D one year
Answer:
365 days
So The Final Answer is a Year
D is the answer
Explanation:
Answer:
C one month
Explanation:
Chemical changes occur as energy is transferred when molecules- - or - to form one or more new substances
Answer:
Correct options are C. As food is digested, molecule bonds are broken, allowing new molecules to form that can be used by our bodies.
D. Energy stored in organic fuels are used for heat and electricity/ When batteries are connected to a circuit, a reaction occurs inside the cell producing electrical energy.
Explanation:
The breakdown of food leads to the release of chemical energy which was first stored in food. This energy is used to drive necessary functions of the body. A series of chemical reactions are involved in the breakdown of food and changing them into useful components for the cell.
Chemical energy is stored in circuits. When the battery is connected to a circuit, the chemical energy gets transferred into electrical energy.
Answer:
change, combine
Which of the following is an advantage of circuit breakers over fuses.
A.) It is easier to trip a fuse.
B.) Circuits get hot.
C.) Tripped circuit breakers do not need to be replaced.
D.) Fuses need to be replaced
One of the advantage of circuit breaker over fuses is tripped circuit breakers do not need to be replaced as fuse does power is in rapid restoration with breakers.
What are circuit breakers?A circuit breaker is an electrical device similar to electrical switches designed to protect the circuit from damges created by over current or short circuit.
Circuit breakers can be operated manually or automatically for saving the electrical network and components. Fuse is another saftey device to provide protection from overcurrent. It is operating automatically and it melts when over current is passed.
Even though fuses can be easily operated and less expensive, power cannot be restored after tripping the fuse whereas, tripped circuit breakers need not be replaced and easily restore the energy as soon.
To find more on fuses, refer here:
https://brainly.com/question/24222914
#SPJ3
Which compound most likely has atoms held together by covalent bonds?
A. Lithium fluoride, LiF
B. Methane, CHA
C. Sodium chloride, NaCl
D. Magnesium chloride, MgCl2
Answer:
Meth CH4
Explanation:
Breaking bad
Answer:
B, Methane CH4
Explanation:
4p3x !
