Answer:
V = 7 m/s
Explanation:
Given that,
Mass 1, m₁ = 4 kg
Speed of the object 1, v₁ = 8 m/s
Mass 2, m₂ = 2 kg
Speed of object 2, v₂ = 5 m/s
After the collision, both objects stick together. Let V be the common velocity. Using the conservation of linear momentum to find it.
[tex]m_1v_1+m_2v_2=(m_1+m_2)V\\\\V=\dfrac{m_1v_1+m_2v_2}{m_1+m_2}\\\\V=\dfrac{4(8)+2(5)}{4+2}\\\\V=7\ m/s[/tex]
So, the velocity of two cars is 7 m/s.
What variables must be known to determine the observed frequency of a wave?
Answer:
The frequency, 'f', of a wave is given by the speed, 'v' of the wave and the wavelength, λ, of the wave
f = v/λ
The frequency, 'f', of a wave is also given by the inverse of the period, 'T', of the wave which is the time it takes the wave to complete an oscillation or a cycle
f 1/T
Therefore, the variables to be known to determine the frequency of a wave includes either, the velocity and the wavelength of the wave or the period of oscillation (the wave cycle) of the wave
Explanation:
Two point sources are simultaneously creating waves with a wavelength of 6 cm. Point X lies between the two sources. It is 9 cm from one source and 15 cm from the other. What wave heights do you expect at point X? A. The waves will never get very high or low. B. The waves may get very high, but will never get very low. C. The waves may get very low, but will never get very high. D. The waves will sometimes get very high and very low.
Answer:
OPTION D (The waves will sometimes get very high and very low) is the answer.
Explanation:
Wavelength = velocity ÷ frequency
As the frequency which measures the number of waves per unit of time is inversely proportional to the wavelength, point X which lies between two sources, and one source is shorter than another, the wave heights at point x will vary as the distances from point X vary too. This means that waves at point X depending on the wave type and source will get very high at times and very low.
Neutrons have a
charge______.
Answer here
Answer:
neutral
Explanation:
A string 1.30 meters in length is oscillating in its first harmonic. The frequency of
oscillation is 7.80 Hz. What is the wavelength of the first harmonic?
Answer:
2.6m
Explanation:
The formula for calculating the wavelength is expressed as;
λ = v/f
v is the velocity
f is the frequency of vibration
Given
f = 7.80Hz
We need to get the velocity
For string;
f = V/2L
7.80 = V/2(1.3)
7.80 = V/2.6
V = 2.6 * 7.8
V = 20.28m/s
Get the required wavelength
λ = v/f
λ = 20.28/7.80
λ = 2.6m
Hence the wavelength of the first harmonic is 2.6m
What is the wavelength of a sound wave that has a speed of 340 m/s and a frequency of 880 Hz?
Answer:
Explanation:Wave length of a sound wave = speed / frequency1) 340 m/s / 880 Hz
Answer:
0.386m
Explanation:
Speed
Wavelength = -----------------
Frequency
340m/s
Wavelength = -------------- = 0.386m
880 Hz
Part G Assume that friction causes the car to lose 37,800 joules of energy as it travels from the top of the first hill to the bottom.
What's the car's velocity at the bottom of the first hill? Use your answer from part C (416,500) and the formula v= to determine the answer.
(This formula is the kinetic energy formula, rearranged to find v.) 2KE
Answer:
29.9 m/s
Explanation:
answer on edumentum
Answer:
Because energy is conserved, the kinetic energy at the bottom of the first hill is the potential energy at the top of the hill, minus energy lost from friction:
KE = 416,500 J – 37,800 J = 378,700 J
To find the velocity of the car, plug the values for KE and m into the formula and solve:
The roller coaster car has a velocity of about 29.9 meters/second at the bottom of the first hill.
Explanation:
edmentum
What happens to the magnetic force as an object gets further away from the magnetic field?
What force can be seen when North Pole is brought near to South Pole
Answer:
Explanation:
The answer is magnetic force
Answer:
Magnetic forces which causes attraction between the two poles
Explain how tangential speed depends on distance.
A lens with f = 35.0 cm is held
42.0 cm from an object. Where
does the image form?
Answer: 210 cm
Explanation:
Look up Thin Lens Equations Calculator- it helps!
Pedro uses a bar magnet to pick up a nail. He then touches the tip of the nail to some staples.
Answer:
B) The nail has become a temporary magnet, while the bar magnet remains a permanent magnet.
Explanation:
I hope this helped you ;)
13. How much work does a 35 N force do to lift a potted plant from the floor to a shelf 6 m high?
F = 35N
Id=6m
Wa
Answer:
W= 210 N
Explanation:
Just use work = Fparallel*d
W= 35*6
W= 210 N
Scott is making a chart to show the difference between chemical reactions and nuclear reactions. Which part of his chart is incorrect? Chemical Reaction Nuclear Reaction Line 1 Happens in the nucleus of atoms Happens between atoms Line 2 Forms new compounds Forms new atoms and radioactive particles Line 3 Involves small amounts of energy Involves large amounts of energy
Answer:
The incorrect part of the chart is;
Line 1
Chemical [tex]{}[/tex] Reaction [tex]{}[/tex] Nuclear Reaction
Line 1 Happens in the nucleus of atoms [tex]{}[/tex] Happens between atoms
Explanation:
The given chart can be presented as follows;
Chemical Reaction [tex]{}[/tex] Nuclear Reaction
1. Happens in the nucleus of atoms [tex]{}[/tex] Happens Between atoms
2. Forms new compounds [tex]{}[/tex] Forms new atoms
3. Involves small amounts of energy [tex]{}[/tex] Involves large amounts of energy
From the above chart, line 1 is incorrect because a chemical reaction happens between the valence electrons of the reacting atoms while a nuclear reaction is the reaction that takes place between the nucleus of two or more atoms or the nucleus of an atom and a subatomic particle to produce one or more than new nuclide of a new atom with a change in the mass of the nucleus being represented by the large amount of energy in the reaction. Therefore, a nuclear reaction takes place in the nucleus of an atom, forms new atoms and involves large amounts of energy
The correct arrangement is presented as follows;
Chemical Reaction [tex]{}[/tex] Nuclear Reaction
1. Happens Between atoms [tex]{}[/tex] Happens in the nucleus of atoms
PLEASE HELP ASAPPPP!!!!!
Katrina replaced the batteries in her camera with rechargeable ones. Later as she was recharging the batteries, Katrina told her mother “I am creating energy so that I can use these batteries again!” What was Katrina actually doing?
removing energy
destroying energy
transforming energy
repairing energy
Which descriptions refer to cumulus clouds? Select three options.
are fluffy
form layers
are usually gray
form 1–1.5 miles above Earth
can extend up to 10 miles into the sky
Answer: are fluffy
form 1-1.5 miles above Earth
can extend up to 10 miles into the sky
Explanation:
Cumulus clouds are referred to as the clouds that have have flat bases and its appearance resembles that of floating cotton.
Cumulus clouds simply shows a fair weather. Cumulus cloud also forms 1-1.5 miles above Earth and can also extend up to 10 miles into the sky.
Answer:
Answer: are fluffy
Explanation:
A construction worker drops a hammer from a 15 m high building. How fast is it going before it hits the ground?
Answer:
12.1 m/s
Explanation:
v^2-u^2=2as
v^2-0=g(15)
a water bomber flying with a horizontal speed of 85m/s at a height of 3000m drops a load on a fire below. How far in front of the target fire should the load be released?
Answer:
2081.65 m
Explanation:
We'll begin by calculating the time taken for the load to get to the target. This can be obtained as follow:
Height (h) = 3000 m
Acceleration due to gravity (g) = 10 m/s²
Time (t) =?
h = ½gt²
3000 = ½ × 10 × t²
3000 = 5 × t²
Divide both side by 5
t² = 3000 / 5
t² = 600
Take the square root of both side
t = √600
t = 24.49 s
Finally, we shall determine the distance from the target at which the load should be released. This can be obtained as follow:
Horizontal velocity (u) = 85 m/s
Time (t) = 24.49 s
Horizontal distance (s) =?
s = ut
s = 85 × 24.49
s = 2081.65 m
Thus, the load should be released from 2081.65 m.
How do the gravitational potential energy and the kinetic energy of the ball change as the ball rolls down the ramp?
Explanation:
The gravitational potential energy is given by :
P = mgh
The kinetic energy of an object is given by :
[tex]K=\dfrac{1}{2}mv^2[/tex]
As the ball reaches the bottom of the ramp, its potential energy decreases and kinetic energy increases.
It imply that, when the ball at the top most height, its gravitational potential energy is maximum and zero kinetic energy and when ball reaches the bottom of the ramp, it will have maximum kinetic energy and zero potential energy.
A 110 kg fire-fighter descends down a pole. He experiences 530N of
friction.
d. Determine the fire-fighters weight
e. Draw an FBD
f. Determine the Fnet
1. Explain how applied heat works between and at critical temperatures.
2. Explain how a refrigerator works to cool down warm objects that would otherwise be i
temperature.
3. Fill in the chart below to identify the name of the process that explains the state of cha
indicated, the states of matter being changed, or the points at which the process occu
Answer:
More heat is required for the change of state.
Explanation:
Applied heat works at critical temperatures because at this point more heat is needed by the substance in order to change the state of substance. At critical temperatures, the substance can't melt if no more heat energy is given to the substance. A refrigerator works to cool down warm objects by absorbing heat from the inside portion of the fridge and provides cool air which cools the inner side of the fridge. The point at which a solid changes into a liquid state is called melting point while on the other hand, the point at which a liquid changes into a gaseous state is known as boiling point of a substance.
Who wants to do my missing physics work
Answer:
WHAT IF I HATE PHYSICS ?A body falling freely on the moon the acceleration due to gravity there is 1.7 m/s2.
a. its displacement at t = 3s
b. the time for it to reach a speed of 25 m/s
c. the time required for it to fall 300 m
d. its speed after falling 70 m
Answer:
a) 7.65 m
b) 14.71s
C) 15.43 m/s
Explanation:
a) s = ut + 0.5at²
s= ?
u = 0
t = 3s
a = 1.7 m/s²
s = 0 + 0.5 × 1.7 × 3²
s = 7.65 m
b) v = u + at
v = 25m/s
u = 0 m/s
a = 1.7 m/s ²
t = ?
v=at
t = v / a
t = 25 / 1.7
t = 14.71s
c) v² = u² + 2as
s = 70m
a = 1.7m/s²
u = 0 m/s
v = ?
v² = 2as
v = √238
v = 15.43 m/s
4
12. The term, bullet, is often incorrectly applied to the:
a. primer, which includes primer powder, gunpowder, the bullet, and the
casing material that holds them all together.
b. cartridge, which includes primer powder, gunpowder, the bullet, and the
casing material that holds them all together.
c. anvil, which includes primer powder, gunpowder, the bullet, and the casing
material that holds them all together.
d. headstamp, which includes primer powder, gunpowder, the bullet, and the
casing material that holds them all together.
Answer:
B. Cartridge, which includes primer powder, gunpowder, the bullet, and the
casing material that holds them all together.
Explanation:
It is right trust me.
PLS HELP, WILL GIVE BRAINLIEST
What subatomic particle has a negative charge and is found outside of the nucleus?
a. electron
b. nucleus
c. neutron
d. proton
Answer:
A
Explanation:
Hope this helps and have a wonderful day!!!
Answer:
A. electron
Explanation:
The electron is the only negatively charged particle in the answers. The proton is positive. The nutron has a neutral charge. The nucleus isn't really a particle. It's a group of protons and neutrons.
examples for each different examples force affects
Explanation:
Examples for effect of force - example
1) Can change the state of an object(rest to motion/ motion to rest):For example, pushing a heavy stone in order to move it. 2) May change the speed of an object if it is already moving. ... 3) May change the direction of motion of an object.
draw the graph of the cooling curve of Naphtalene; hence discuss the cooling curve of Nephtalene
Answer:
soory but i cant under stand it proper can explain
the nearest star to our planet other than the sun , is 4.4 light year away.One light-year is the distance light travels in a year.
* HOW LONG DOES IT TAKE FOR TO REACH US?
* SUGGEST WHY LIGHT-YEAR IS USED AS THE UNIT FOR MEASURING THE DISTANCE BETWEEN DISTANT STARS AND OUR PLANET, RATHER THAN THE UNIT 'KILOMETER,
Answer:
1606
The main reason for using light years, however, is because the distances we deal with in space are immense. If we stick to miles or kilometers we quickly run into unwieldy numbers just measuring the distance to the nearest star: a dim red dwarf called Proxima Centauri that sits a mere 24,000,000,000,000 miles away!
Explanation:
Find the wavelength of a transverse wave the frequency of the wave motion is 3 Hz and the wave travels with a velocity of 48 m/s .
Answer:
16 m
Explanation:
What 2 materials are the planets in our solar system made of?
Please answer this quickly please please please please please please please
they are made up of rock and gas
Answer:
Hydrogen and Helium. 75% Hydrogen and 25% Helium.
Explanation:
If a machine increases force it must apply the force over a long distance? True or false
Answer: The machine must apply the force over a shorter distance. That's because a machine doesn't change the amount of work and work equals force times distance. Therefore, if force increases, distance must decrease
FALSE
HOPE THIS HELPS