Answer:
the final velocity of the two blobs after collision is 3.21 m/s.
Explanation:
Given;
mass of first blob, m₁ = 9 kg
mass of the second blob, m₂ = 5 kg
initial velocity of the first blob, u₁ = 5 m/s
initial velocity of the second blob, u₂ = 0
Let the final velocity of the two blobs after collision = v
Apply the principle of conservation linear momentum to determine v;
m₁u₁ + m₂u₂ = v(m₁ + m₂)
9 x 5 + 5 x 0 = v(9 + 5)
45 = 14v
v = 45 / 14
v = 3.21 m/s
Therefore, the final velocity of the two blobs after collision is 3.21 m/s.
Can we have the Doppler effect with light waves? How?
Answer:
Besides sound and radio waves, the Doppler effect also affects the light emitted by other bodies in space. If a body in space is "blue shifted," its light waves are compacted and it is coming towards us. If it is "red shifted" the light waves are spread apart, and it is traveling away from us.
Explanation:
What type of galaxy is pictured?
•elliptical
•irregular
•lens
•spiral
Per Bernoulli's Principle, low velocity = ____ pressure.
A. high
B. medium
C. low
D. no
Answer:
A. high pressure
Explanation:
Bernoulli's equation is given as;
[tex]P_2 + \frac{1}{2} \rho v_2^2 + \rho gh_2 = P_1 + \frac{1}{2} \rho v_1^2 + \rho gh_1\\\\P_2 = P_1 + \frac{1}{2}\rho (v_1^2 - v_2^2) + \rho g(h_1-h_2)[/tex]
Based on the equation above, it can be seen that an increase in velocity (from v₁ to v₂ ) causes a decrease in pressure (P₂), while a decrease in velocity will cause an increase in pressure.
Therefore, Per Bernoulli's Principle, low velocity = high pressure.
Which bar graph shows the reaction rates for a reversible reaction that has reached dynamic equilibrium?
What is the rate at which velocity changes called?
Acceleration occurs when an object changes its_ or _or both
Answer:
Acceleration occurs when an object changes its VELOCITY or DIRECTION or both
Explanation:
What is happening to the water molecules as it changes from ice to liquid water? *
They are losing energy, can’t move only vibrate
They are gaining energy, can move and slide past each other
They are moving at high speeds and are far from each other
They are gaining energy, moving slowly until they evaporate
Answer:
They are gaining energy, can move and slide past each other.
Explanation:
Because as ice melts, the molocules gain energy/heat which warm them up and are able to slide/move apart from each other.
How is speed related to kinetic energy?
Answer:
K.E. = 1/2mv^2
Explanation:
v is velocity (a vector) not speed (a scalar) but they have the same magnitude
How much is the velocity of a body
when it travels 6oo meter in 5 minute ?
Answer:
velocity=2m/s
I hope it's helps you
Answer:
Its average speed, pretending that it traveled at a constant speed, is
v = s / t
= 600 m
5 x 60 s
= 2 m/s
Hope it help...
Havea great day
7) When you place a metal saucepan on the heating element of a stove, heat is transferred from the element to the saucepan by:
A reflection.
B convection.
C conduction.
D radiation.
8) Which of the following can be described as being luminous :
A Streetlights (turned on)
B A road sign
C The moon
D Water
9) In the burning of fireworks during New Year displays, chemical potential energy is converted into:
A heat, light and sound energy.
B light and sound energy.
C sound and heat energy.
D gravitational potential energy and light.
10) Which would be the most appropriate description of how energy is distributed when a torch is turned on?
A 70% light energy, 30% thermal energy
B 70% thermal energy, 30% electrical energy
C 65% light energy, 30% thermal energy
D 40% thermal energy, 55% light energy
Answer:
Explanation:
7.Conduction
Assuming the pot is cold and the heating element is hot: Heat will be transferred from the element to the pan via conduction because they are in contact with one another.
8. C The moon
9. A heat, light and sound energy.
When fireworks explode, chemical energy is transformed into thermal energy, mechanical energy, radiant energy, and sound energy.
10.A 70% light energy, 30% thermal energy
When the flashlight is turned on, the chemical energy is first transformed into electrical energy and then into light energy.
If number 10 is not correct then the answer is C.
AND THIS ONE PLEASE PLEASE PLEASE
Answer:
The answer is D
what are newtons laws of motion?
Answer:
In classical mechanics, Newton's laws of motion are three laws that describe the relationship between the motion of an object and the forces acting on it. The first law states that an object either remains at rest or continues to move at a constant velocity, unless it is acted upon by an external force.
Explanation:
Why the temperature of a resistor increase when a current pass through it
Answer:
So, when an electrical charge passes through a resistor, some of that electrical energy is transferred into heat, increasing the temperature. This extra energy causes the particles in the resistor to vibrate more. With these particles moving more, it is more difficult to for the electrons to move through the resistor.
Velocity is speed with ?
To answer this question click the blank, then click the word in the word bank.
Word Bank:
A:Direction
B:slope
C:acceleration
Answer:
A. Direction
Explanation:
Velocity is the speed of something heading in a certain direction. If speed or direction changes, the velocity changes.
Which statement best explains the difference between light waves traveling through a vacuum and light waves traveling through a medium?
Answer:
The statement which best explains the difference between the light waves travelling through a vaccuum and light waves travelling through a medium is -"When light waves travel through a vacuum, they travel faster than when they travel through a medium."
Explanation:
Light waves are faster in vacuum because The refractive index of vacuum is the lowest since there is no barrier in the way of light propagation in vacuum. Demonstrate that the maximum speed of light in vacuum.
In a vacuum, light flies at 186,283 mph. Light flies at 186,200 mph in the air, or 56 mph slower. In another medium, such as water, light travels at 139,712 mph, or around 3/4 of the speed of light in a vacuum.
LIGHT WAVES -: Light waves are a form of electromagnetic wave that includes both visible and invisible to the naked eye wavelengths on the electromagnetic spectrum. The average human eye can see light with wavelengths ranging from 390 to 700 nanometers, or nm.
Forms of light waves comprises of Radio waves , microwaves , infrared waves , visible light etc.
When light waves travel through a vaccume, they travel faster than when they travel through a medium
What is light wave?A light wave is an electromagnetic wave which travels through the vacuum of outer space. Light waves are produced by vibrating electric charges., An electromagnetic wave is a transverse wave which has both an electric and a magnetic component.
Light waves are faster in vaccum because the refractive index of vaccume is the lowest since there is no barrier in the maximum speed of light in vaccum.
In vaccum light travels at 186283 mph in air 186200 mph in other medium like water at 139712 mph.
Hence light waves travel through a vaccum, they travel faster than when they travel through a medium
To know more about light waves follow
https://brainly.com/question/14015797
What does the root cand mean in the word candescent?
The candescent quality of the room was improved by the southern exposure.
Answer:
Glowing
Explanation:
what happens if one part of the body breaks down
Answer:
all the body parts work together to make your body function properly, so therefore, a lot of other body parts will break down
If 550 J of work is done to pull a box horizontally across the floor 4.6m, what is the force of friction between the box and floor?
The work done is the product of the force and resulted displacement. The frictional force between the box and floor is 119.5 N.
What is force?Force is external factor acting on a body to make a change in the state of an object . According to Newton's second law of motion, force is the product of mass and acceleration.
The work done in physics is the product of force acting on a body and its displacement. Therefore, the force which result in a displacement of the body is said to be work done on the object.
Here, the work done by frictional force is 550 J and displacement is 4.6 m.
Therefore, the force = work done / displacement
= 550 J/ 4.6 m
= 119.5 N.
Hence, the force between the floor and box will be 119.5 N.
To find more on frictional force, refer here:
https://brainly.com/question/1714662
#SPJ2
which element has the highest atomic number,oxygen or aluminum
Answer:
Aluminum has the highest atomic number
An object of mass 4.0 kg is dropped from a height of
1000 m from a helicopter. The air resistance acting
against the parachute exerts a steady upward force of 35 N. Calculate the kinetic energy of the object when it reaches the ground and hence find its velocity.
A turtle moves at an average speed of 0.2m/S towards the finish line that is 80m away from the starting line. A rabbit,racing with the turtle,leaves the starting line 5.4 minutes after the turtle. The speed of the rabbit is 3.6km/h. Which one of them wins the race? Justify
Answer:
5.6mls
Explanation:
A hydraulic press consist of of two
cylinders of cross sectional areas
0.2m2 and 5m². The piston in the
smaller cylinder is pushed down
with a force of 100N through a
distance 0.2m. calculate
Links
(0)
The pressure transmitted
(ii)
The force exerted by the
piston in the larger cylinder.
Answer:
Explanation:
i )
area of small piston = 0.2 m²
Force = 100 N
pressure created on small piston
= 100 / .2 = 500 N/m²
According to Pascal's law , this pressure will be transmitted to larger cylinder .
area of larger cylinder = 5 m²
ii )
pressure = force / area
force in the large cylinder = pressure x area of large cylinder
= 500 x 5
= 2500 N .
Find the energy of a 50kg object that is moving at 4m/s
Identify what happens to the kinetic energy (KE) and gravitational potential energy (PE) of a rock as it falls.
KE and PE both increase.
KE and PE both decrease.
KE increases and PE decreases.
KE decreases and PE increases.
Answer:
KE increases and PE decreases.
Explanation:
POTENTIAL ENERGY (PE):
The potential energy of the rock depends upon the height of the rock, as given by the following formula:
P.E = mgh
Therefore, the potential energy will be highest at the initial point due to the highest height attained by rock. As the rock falls, its height will decrease as a result its potential energy will also decrease.
KINETIC ENERGY (KE):
The kinetic energy of the rock depends upon the velocity of the rock, as given by the following formula:
[tex]K.E = \frac{1}{2}mv^2[/tex]
Therefore, the kinetic energy will be zero at the initial point due to the zero velocity of the rock. As the rock falls, its velocity will increase as a result its kinetic energy will also increase.
Hence, the correct option will be:
KE increases and PE decreases.
pls help meeee!!! will mark brainliest!!
Answer:
water
is missing in above equation
hope it helps
I’ll love you forever if you help me <3
explain the forces of that affect the soccer balls path.
Answer:
yeah its correct
Explanation:
As the ball spins, friction between the ball and air causes the air to react to the direction of spin of the ball. ... Therefore, when a soccer player kicks the ball right of center the ball spins counter-clockwise and the Magnus force acts left, causing the ball to curve left.
Mercury boils at 357C and freezes at -38.9C. Convert these temperatures
to Kelvin.
ANSWER AND I WILL GIVE YOU POINTS
You exert 500 N down on the earth as you jump into the air. How much force does the earth exert back on you?
Answer:
500 Newton itself
Explanation:
Newton's third law of motion
James went to the doctor for a check-up and found his weight to be 1,000 N. How much mass does James have?
Answer:
102.04kg
Explanation:
(1000kg*m/s^2)/(9.8 m/s^2)