Answer:
A sonar device sends pulses of sound waves down through the water. When these pulses hit objects like fish, vegetation or the bottom, they are reflected back to the surface. The sonar device measures how long it takes for the sound wave to travel down, hit an object and then bounce back up.
What are the following amounts of energy in joules?
i. 20 kJ
ii. 10 MJ
iii. 2.5 MJ
iv. 0.5 kJ
help me!!!
Answer:
Explanation:
20 kJ = 20000 joules
10mj = 10000000 Joules
2.5mj = 2,500,000 joules
0.5kj = 500 joules
If object A is half the mass of object B, then is it possible for them to have the same momentum
Of course !
Object-A just has to move twice as fast as Object-B.
when a human cannon ball shoots in the air for 9 seconds, she travels 37 meters before ut lands. Caculate the speed
Answer:
9.1 mph
Explanation:
Please help Best answer gets BRAINLIEST
A skier waits at the top of a 11.7m hill. He then skis down the slope at an angle of 27 degrees above horizontal. What will his velocity be at the bottom of the hill? Show work
Answer:
v = 3.89 m / s
Explanation:
For this exercise let's use the concept of conservation of mechanical energy
starting point. In the highest part of the mountain
Em₀ = U = m g h
final point. In the lower part
Em_f = K = ½ m v²
how energy is conserved
Em₀ = Em_f
mgh = ½ m v²
v = [tex]\sqrt{ 2gh}[/tex]
let's use trigonometry to find the height
sin θ = h / L
h = L sin θ
we substitute
v = [tex]\sqrt{ 2g L \ sin tea}[/tex]
let's calculate
v = [tex]\sqrt{2 \ 9.8 \ 1.7 \ sin 27}[/tex]
v = 3.89 m / s
If a resistance is added in series to a circuit, the circuit resistance is then
Answer:
greater
Explanation:
If a resistance is added in series to a circuit, the circuit resistance is then: greater
To what temperature will a 50.0 g piece of glass raise if it absorbs 5275 joules of heat and its specific heat capacity is 0.500 J/g°C? The initial temperature of the glass was 20.0 degrees C.
*Include your units!
Round your answer to the nearest whole number.
Answer:
231 C final temperature, 211 C change in temperature
Explanation:
To solve this problem you you use the q=MCΔT equation, where q is heat, m is mass, c is specific heat, and ΔT is change in temperature. Since we're given heat and solving for temperature we rearrange the equation to q/(M*C)=ΔT. At this point we simply plug in the given values to get a ΔT of 211, but this is simply the change in temperature so you add the initial to this to get the final temp.
PLEASE NO FILES. Ill give brainliest! 1. Which item below describes a quick change to
Earth's landscape?
A. a stone becoming smooth
B. dirt moving down a steep hill
C. flat land becoming a canyon
D. a glacier flattening the land below it
Answer:
B i think
Explanation:
plz let me know if wrong
Answer:
Yes it is B
Can you please mark Brainliest
how does 3rd class lever make our work easier
Answer:
the third class lever makes our work easier as effort is located at the middle, load at first and fore is applied at the buttom. which helps in accelerating work.
hope it is helpful to you
As you turn on the stove, you notice that your water changes temperature from 67 degrees F to 93 degrees F. How many degrees of change is that in degrees C?
Answer:
14.44 degrees of C change
Explanation:
67 to 93 F is 26 degrees F change
C = 5/9 F
26 * 5/9 = 14.44 C change
An air craft heads. north at 400 km/hrs relative to the wind the air craft velocity is 300 km/hrs due north .find the velocity of the wind to the ground.
Answer:
325
Explanation
seio na:
Which statement describes a difference between insulators and conductors?(1 point)
Insulators have high conductivity, while conductors have low conductivity.
Insulators can transmit electric current, while conductors cannot.
Insulators are made of metallic materials, while conductors are not.
Insulators have high resistance, while conductors have low resistance.
Answer:
The "Insulators have high resistance, while conducters have low resistance".
The difference between insulators and conductors is insulators have high resistance, while conductors have low resistance.
What is insulator?An insulator is a material that does not allow easy passage of electric current through it. In other words, these materials have high resistance to the flow of current.
What is conductor?A conductor is a material that allows easy passage of electric current through it. In other words, these materials have low resistance to the flow of current.
Thus, the difference between insulators and conductors is insulators have high resistance, while conductors have low resistance.
Learn more about Insulator here: https://brainly.com/question/1472743
Research shows that continents move at an average rate of 2.3 cm per
year. Which two theories could be supported by this evidence?
Raisin theory
Expanding Earth theory
Contracting Earth theory
Theory of continental drift
SUBMIT
theory of continetal drift sumbit
What electromagnetic waves are used in these applications?
Diagnosing illnesses:
Warming and cooking food:
Transmitting data from remote controls to televisions:
The electromagnetic waves are used in these applications are:
Diagnosing illnesses: X-rays.
Warming and cooking food: infrared waves.
Transmitting data from remote controls to televisions: Radio waves.
What is electromagnetic waves?The oscillations between an electric field and a magnetic field produce waves known as electromagnetic waves, or EM waves. In other words, magnetic and electric fields oscillate to form electromagnetic (EM) waves.
When an electric field interacts with a magnetic field, electromagnetic waves are created. Therefore, they are referred to as "electromagnetic" waves. An electromagnetic wave's electric field and magnetic field are perpendicular to one another (at right angles). Additionally, they are perpendicular to the EM wave's direction. An electromagnetic wave can pass through any medium, including vacuum, solid materials, and air. It can spread or move from one area to another without the use of a medium.
Learn more about electromagnetic wave here:
https://brainly.com/question/3101711
#SPJ5
A sound wave of a clock. what is the type of wave longitudinal, transverse or torsional
Answer:
transverse
Explanation:
Identify the medium for the following waves:
ripples
The sound waves from a radio speakers
Seismic waves
Answer:
The sound waves from a radio speakers
Explanation:
Electric field shows the strength and what of an electric field
Answer:
a region in which particles with an electric charge will experience a force
Explanation:
let me know if its wrong . sorry if it is
Please help!! I will give brainliest!
Q: Is the direction important when calculating speed? Explain.
Answer:
Depends.
Explanation:
Whether the object is going left or right, the speed will stay the same until friction eventually stops it. However, if, for example, we're talking about an object going straight before veering right, then yes, speed does matter. An object will normally have to speed up or slow down momentarily when changing direction to keep itself sustained on the ground.
So, honestly? It really depends on what we're talking about!
Hope this helped!
Source(s) used: None.
3. Conduction will occur between objects at different temperatures that are
A separated, but not in contact with each other
B in contact with each or separated
C in contact with each other, but not separated
Emma is making jelly. In order to make it dissolve quickly, should Emma put the block of jelly in whole, or
break it into cubes? Explain your answer.
[2 marks]
Answer:
Break it into cubes. When you make the thing that is dissolving smaller, the surface area of the thing dissolving it is larger, making the jelly more exposed.
Which of the following is/are true of a vector? Check all that apply.
1. Velocity is a vector quantity.
2. Distance is a vector quantity.
3. The magnitude of a vector cannot be zero unless all of its components are zero.
4. A vector can have positive or negative magnitudes.
5. Vectors indicate quantity and direction.
Answer:
3
Explanation:
Question 3 of 10
Jake lifts a backpack with a force of 30 N to a height of 1 meter in 4 seconds.
How much work does he do on the backpack?
A. 120 N
B. 30 N
C. 15 N
D. 60 N
Answer:
30N
Explanation:
helpp me
An object starts from REST and ends up reaching 3500 J of Kinetic Energy. How much work was done?
A ball of mass 0.5 kg is swinging at a small angle from a light string of length 0.25 m. What is the period of this pendulum? Round answer to two significant digits.
Answer: 1.0
Explanation:
not sure why but that is the correct answer
Answer:
1.0
Explanation:
Correct answer on Khan Academy
Magnetic field lines are more concentrated at the poles of the magnet
True
False
Answer:
True! UwU
Explanation:
the magnetic field is strongest near to the poles of the magnet were the lines of flux are more closely spaced.
1. The diameter of the spool on a fisherman's reel is 6 cm when it is fully
wrapped with fishing line. After casting his lure 16 meters away into the
water, there is enough line left on the spool such that the spool has a
diameter of 4 cm. The fisherman then reels in the line, turning the bail (the
metal part that wraps the fishing line around the spool) at a constant speed
of 16 rad/s. How long does it take him to reel in the fishing line?
4cm -443
so just adda nd then dibvid e3 webri
What is always true about the total amount of oxygen and carbon dioxide in the test tube?
What is the genotypes for HH or hh called?
what is the characteristics of sound
Answer:
Sound wave can be described by five characteristics: Wavelength, Amplitude, Time-Period, Frequency and Velocity or Speed.
Answer:
Sound wave can be described by five characteristics:
Wavelength,
Amplitude,
Time-Period,
Frequency and Velocity or Speed.
The minimum distance in which a sound wave repeats itself is called its wavelength.
Explanation:
good luck
The diagram below shows a 1.0 x 105newton truck at rest on a hill that makes an angle of 8.0° with the
horizontal. What is the component of the truck's weight parallel to the hill? (hint: the weight was already
calculated, also you can use the work area to help you solve this.]
Answer:
[tex]it \: is \: mg \sin(8.0 \degree) \\ = 1.0 \times 10 {}^{5} \times \sin(8.0 \degree) \\ = 9.9 \times 10 {}^{4} newtons[/tex]
The component of the truck's weight parallel to the hill is 13,917.31 N.
The given parameters:
Weight of the truck, W = 1.0 x 10⁵ NInclination of the hill, θ = 8⁰The component of the truck's weight parallel to the hill is calculated as follows;
[tex]W_x = mg \times sin(\theta)\\\\W_x = W \times sin(\theta)\\\\W_x = 1\times 10^5 \times sin(8)\\\\W_x = 13,917.31 \ N[/tex]
Thus, the component of the truck's weight parallel to the hill is 13,917.31 N.
Learn more about parallel forces here: https://brainly.com/question/9719731
A spring oscillates with a period of
0.228 S. What is its frequency?
(Unit = Hz)
Answer:4.39
Explanation:For acellus students the answer is 4.39