Two sound waves (wave X and wave Y) are moving through a medium at the same speed. If wave X has a greater frequency than wave Y, then wave X
Answer:
Wave X has a shorter wavelength.
Explanation:
The relation between the speed of a wave, its wavelength and frequency is given by :
[tex]v=f\lambda[/tex]
It can be seen that the relationship between the frequency and wavelength is inverse.
In this problem, it is mentioned that two sound waves (wave X and wave Y) are moving through a medium at the same speed. The frequency of wave X is greater than wave Y. Then it would mean that wave X have shorter wavelength than wave Y (due to inverse relation).
Pollen is one celled, or unicellular. It is used for reproduction in many types of plants. The bee is collecting nectar and, while doing that, is transferring the very tiny pollen grains The bee and the flowering plant are multicellular organisms, but they both have many things in common with the unicellular pollen What is one feature NOT shared by all three! All are made of one or more cells. The cells of each contain genetic material The cells of each contain exactly the same parts A cell membrane controls what goes in and out of the cells 9 Hierarchical Organisation SA PREP ITEST PREP PAX 1-877.816-0808 PHONE 1-877.377.953 Read Our Blog Meet Our Teachers Privacy Policy O USA Testprep LC 2030 A Rights Reserved
Answer:
This question is unclear, however, the answer to the initial clear part is:
The cells of each contain exactly the same parts
Explanation:
Thee three organims/structures mentioned in this question are: bees, flowering plants and pollen. Based on the information provided in the question, they all contain one (unicellular) or more (multicellular) cells.
However, considering the fact that bees are made up of animal cells while pollen and flowering plants are made up of plant cells, the cells of each will not contain exactly the same parts. For example, bees do not have chloroplasts in their cells while flowering plants do.
write the chemical name and chemical formula for four hydrogens and two nitrogen
Answer:
2 moles of H2Nsuperscript(-) or NHsubscript2 , amide group!
I hope it will be useful.
A. about 1.8
B. about 9.1
C. about 18.1
D. about 28.3
Please help me
Answer:(b)
Explanation:
Given
GK=16 units
KH=y units
using Sine rule
[tex]\frac{\sin G}{y}=\frac{\sin H}{16}\\\frac{\sin 30^{\circ}}{y}=\frac{\sin 62^{\circ}}{16}\\y=16\times \frac{\sin 30^{\circ}}{\sin 62^{\circ}}\\\\y=16\times \frac{0.5}{0.883}\\y=9.06\ \approx \ 9.1\ units[/tex]
An elevator car has a mass of 750 kg, and its three passengers have a combined mass of 135 kg. If the elevator and its passengers ride to the ground floor, 20.7 m below, find the change in gravitational potential energy of the car and its passengers. Show all your work.
Answer:
The change in gravitational potential energy is -1.80x10⁵ J.
Explanation:
The change in gravitational potential energy is given by:
[tex] \Delta E_{p} = E_{p_{f}} - E_{p_{i}} [/tex]
[tex] \Delta E_{p} = mgh_{f} - mgh_{i} [/tex]
Where:
"i" is for final and "f" for final
m: is the mass
g: is the gravity = 9.81 m/s²
h: is the height
For the car and the passengers we have:
[tex] \Delta E_{p} = m_{T}g(h_{f} - h_{i}) = (750 kg + 135 kg)9.81 m/s^{2}(0 - 20.7 m) = -1.80 \cdot 10^{5} J [/tex]
The minus sign is because when the elevator car and the passengers are up they have a bigger gravitational potential energy than when they are in the ground.
Therefore, the change in gravitational potential energy is -1.80x10⁵ J.
I hope it helps you!
What is the velocity of a toy car that rolls 350 cm towards a wall in 4.8 seconds?
A. 0.73 cm/s towards the wall
B. 1,680 cm/s towards the wall
C. 354.8 cm/s towards the wal
l D. 72.9 cm/s towards the wall
Answer:
D. 72.9 cm/s towards the wall
A ball having a mass of 0.20 kilograms is placed at a height of 3.25 meters. If it is dropped from this height, what will be the kinetic energy of the ball when it reaches 1.5 meters above the ground?
A.
1.2 joules
B.
2.2 joules
C.
3.4 joules
D.
3.6 joules
E.
4.3 joules
Answer:
C.
3.4 joules
Explanation:
Answer for Plato and edmentum
what is kepler-10b ?
Answer:
is the first confirmed terrestial planet to have been discovered outside the solar system by the kepler space telescope
Explanation:
Answer:
tumko hy matlab hai mera
A key falls from a bridge that is 45 m above the water. It falls directly into a model boat, moving with constant velocity, that is 12 m from the point of impact when the key is re- leased. What is the speed of the boat
Answer:
4m/s
Explanation:
The motion is in downward direction, and the boat is moving with constant velocity, the position of the boat horizontally is 12m before the key fall.
The height difference "h"= ( y- y°)= 45 m
We can determine the needed time the key requires to reach the water using the expression from Newton's law
h= v(o) + 1/2 at^2
g= acceleration due to gravity= 9.8m/s^2
h= v(o) + 1/2 gt^2 -------------------------eqn*)
V(o)= 0 for the key= initial velocity
h= height that the key falls= 45m
If we substitute the above values into eqn(*) we have
We can make t^2 subject of the formula since v(0)= 0
t^2= h/(1/2 g)
= 45/(1/2× 9.8)
t^2= 45/4.9=9.18
t= √9.18
t=3.03 secs
Since the boat was moving with constant velocity,
Then Velocity= distance/ time
= 12/3.03
Velocity= 4m/s
Hence, the speed of the boat is 4m/s
Answer:
The person above me is correct. The speed of the boat is 3.6363m/s, or also 4m/s.
We know these following values from the key:
d = 45 , g = -9.8 (its because its falling) , vi = 0
With this, we can plug and chug using kinematic equations.
Doing so will get you 29.69 for Vf and 3.03 for time.
Now, we want the speed from the boat -- speed is defined as the distance over time. We know the distance from the boat is 12m, but now we know the time, which is 3.03.
-This time is correct because we know the boat was at "0m" when the key was at the start, but after it dropped, it was at 12m. So by finding out the time it took for the key to drop, it also tells us the amount of time it took the boat to travel 12m.
So this means we can divide 12m by 3.03s, or you can round it to 3. Whatever really works;
12/3.03 should get you something like 3.63 repeating
if you rounded, you will get 12/3, which is 4.
A kayak took 5 hours to finish its trip on a river. If it traveled at an
average speed of 18 mph (mile per hour), what was the distance of the
trip?
miles
The distance of the trip that Kayak travelled at an average speed of 18 mph in 5 hour is 90 miles
How do I determine the distance?First, we shall obtain the eqaution to determine the distance. This can be obtained as follow:
Speed is defined as:
Speed = distance / time
Cross multiply
Distance = speed × time
With the above formula, we can obtain the distance. Details below
The following data were obtained from the question:
Time = 5 hourSpeed = 18 mphDistance =?Distance = speed × time
Distance = 18 × 5
Distance = 90 miles
From the above calculation, we conclude that the distance traveled is 90 miles
Learn more about distance travelled:
https://brainly.com/question/26156790
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4. During which three months is the difference the same between average high temperature and average low temperature?
Answer:
1 Inch and 20 F
Explanation:
how do you get the net force
The net force on a body is the resultant of all the force acting on the body, which can be calculated by the vector addition of all the forces as the force is a vector quantity.
Generally, the components of the forces in a single direction (x,y, and z) added together, then the resultant of all the forces can be determined which is the net force.
For example if f1, f2,..fn are n forec action on the body as
f1 = a1 i + b1 j + c1 k
f2= a2 i + b2 j + c2 k
fn = an i + bn j +cn k
Then the net force, F, action on the body
F= f1 + f2+ ... +fn
F= (a1 i + b1 j + c1 k) + (a2 i + b2 j + c2 k)+...+(an i + bn j +cn k)
F=(a1+a2+...an)i+(b1+b2+...+bn)j + (c1+c2+...+cn)k which is the net force.
In this way, the net force can be determined.
HELP PLEASE!!!
a crane lifts a 3,000 kg beam of concrete from the ground to a height of 50 m. what work is being done on the concrete?
Answer:
1,470,000Joules
Explanation:
Work done = Force * distance moves in the direction of the force
Given
mass = 3000kg
distance = 20m
Get the force
F = mg
F = 3000(9.8)
F = 29400N
Get the work done
Work done = 29400 * 50
Work done = 1,470,000Joules
Hence 1,470,000Joules work has been done on the concrete
Calculate the magnitude of the gravitational force between Goku with a mass of 62 kg and King Kai’s planet with a mass of 1.458x1015 kg if the distance between their centers of mass is 31 m.
Answer:
6227.866 N
Explanation:
F = G . m(goku) . m(planet) / d²
F = 6.674 x 10-¹¹ x 62 x 1.458 . 10¹⁵ / 31²
F = 6227.866 N
Calculate the displacement of a motorcycle that accelerates forward from rest to 7.0 m/s in 3.5 s.
I need solution and statement.
Answer:
12.25 meters
Explanation:
s=1/2(v+u)t
s= displacement
v= final velocity
u= initial velocity
t= time
7m/s+0m/s divide by 2= 3.5 m/s velocity Times 3.5 seconds= 12.25 meters
why do students in uganda need to study physics
Answer:
1.To acquire problem solving skills like simple repairs at home,simple instruction etc. 2. To acquire skills of operating and using equipments.Explanation:
I hope l helped you ❤❤❤Answer:
1. Ability of problem solving.
2. Physics gives u a job.
3. Physicists can become engineers.
4. Physics puts your math to use.
5. Physics is versatile.
6. Physics makes things possible.
1. A limiting factor for using nuclear energy is the
produced
O A. flooding
O B. pollution
O C. waste
O D. heat
Answer:
waste
Explanation:
took da test. nhgvgg
State the meaning of specific heat capacity of copper is 380 J/kg°C.
Answer:
Specific heat capacity means that in order to raise copper by 1C per kg, it needs 380J of heat energy.
the diagram shows a force being applied to a lever to lift a heavy weight. What change would enable the heavy weight to be lifted with a smaller force
Move the force to the right.
A 4.0 kg object will have a weight of approximately 14.8 N on Mars. What is the gravitational field strength on M
Answer:
Gravitational field strength =weight/mass
Explanation:
14.8N/4.0kg
3.7N/kg
How do labels protect us at the grocery store? Will gove Brainliest to RIGHT answer :)
to guide us on where stuff are or what the stuff are called and used for
why is an inflated balloon likely to burst if you leave it near a window with the sun streaming in it?
Answer:
Because the plastic of the balloon will eventually get to such I heat the radiation from the sun would cause it to pop
Explanation:
that is my answer
Answer:
because the heat melts the rubber and when it does it pops when it gets to hot
Explanation:
A force of 0.8 newton causes a spring to extend by 4 cm. What is the spring constant?
20 N per meter
56 N per meter
32 N per meter
40 N per meter
Answer:
20 N per meter
Explanation:
k = Fe
f = 0.8N
e = 4cm change to m = 4 ÷ 100 = 0.04
0.8 ÷ 0.04 = 20 N per meter
how much kinetic energy does an object at rest have ?
Answer:
None
Explanation:
Because an object only has kinetic energy when in motion.
Answer:
0
Explanation
If its at rest there is no kinetic energy
What happens if all the heat energy contained in a body is removed? and what will be it's temperature?Explain
Answer:
If all the heat energy contained in a body is removed and changes in its temperature is described below in detail.
Explanation:
It moves from a body at a greater temperature to a body at a cheaper temperature. All element survives as solids, liquids, or gases. The material can transfer from one station to another if warmed or cooled. When heat is provided to a body its heat increases: When a physical body, hard, liquid. When heat is provided is stopped to a body its temperature decline.
When we dissolve a substance in water, a -------- is formed
Answer:
solution
Explanation:
Answer:
When a substance dissolves in water, you can’t see it anymore, it’s still there, but has mixed with the water to make a transparent liquid called a solution. The bonds in salt compounds are called ionic because they both have an electrical charge—the chloride ion is negatively charged and the sodium ion is positively charged.
Explanation:
Two persons (each on a skateboard) are initially standing still and facing each other before pushing off of each other. One person (50 kg) moves backwards at 1.1 m/s. Calculate the velocity of the second person (65 kg).
Answer:
The second person will have a velocity of 0.85 m/s in the opposite direction of the first person.
Explanation:
Law Of Conservation Of Linear Momentum
The total momentum of a system of bodies is conserved unless an external force is applied. The formula for the momentum of a body with mass m and velocity v is:
P=mv.
If we have a system of bodies, then the total momentum is the sum of them all
[tex]P=m_1v_1+m_2v_2+...+m_nv_n[/tex]
If a collision occurs, the velocities change to v' and the final momentum is:
[tex]P'=m_1v'_1+m_2v'_2+...+m_nv'_n[/tex]
In a system of two masses, the law of conservation of linear momentum is:
[tex]m_1v_1+m_2v_2=m_1v'_1+m_2v'_2[/tex]
According to the conditions of the problem, two persons standing on a frictionless surface are initially at rest (v1=0, v2=0). Their masses are m1=50 Kg and m2=65 Kg. After the push, one person (say m1) moves backward at v1'=-1.1 m/s. We can calculate the speed of the other person by solving for v2':
[tex]\displaystyle v'_2=\frac{m_1v_1+m_2v_2-m_1v'_1}{m_2)[/tex]
Substituting:
[tex]\displaystyle v'_2=\frac{50*0+65*0-50(-1.1)}{65)[/tex]
[tex]\displaystyle v'_2=\frac{55}{65}[/tex]
[tex]v'_2=0.85 \ m/s[/tex]
The second person will have a velocity of 0.85 m/s in the opposite direction of the first person.
__________ skids occur when you suddenly press too hard on the accelerator and the drive wheels lose traction.
Answer:
Power Skids
Explanation:
Power Skid like the question suggested, is a skid that occurs when you suddenly press too hard on the accelerator and the drive wheels lose traction. Power Skid is one of the 4 types of Skids. The other 3 includes;
Cornering skid
Blowout skid and
Braking skid.
Power skid occurs mostly as a result of insanely high speed and or acceleration,when the accelerator is pressed on too suddenly causing the vehicle to be driven beyond its capabilities, and then to skid, ultimately.
Calculate the current in each 10.0 Ω resistor in the series circuit and in the parallel circuit if the power supply is 60.0 V.
Answer:
Explanation:
Step one:
given data
the current in each 10.0 Ω
The power supply is 60.0 V.
Required:
current in the series and parallel circuit arrangement
Step two:
The drawing looks like a ladder with 4 rungs.
One rung is a 60-volt battery.
The other 3 rungs are the 3 resistors.
a). The equivalent resistance is the reciprocal of (1/10 + 1/10 + 1/10).
That's the reciprocal of 3/10, or about 0.3ohms.
b). I = V/R = 60 /0.3... = 200 Amperes.
Answer:
for series: i=v/r
V=60volts
R=30ohms (added ohms of the 3 resistors)
i=60volts/30ohms
i=2amps
for parallel: i=v/r1 + v/r2 ...
v=60volts
r1=10
r2=10
r3=10
i=60/10+60/10+60/10
i=6+6+6
i=187
Explanation:
https://phys.libretexts.org/Bookshelves/University_Physics/Book%3A_University_Physics_(OpenStax)/Book%3A_University_Physics_II_-_Thermodynamics_Electricity_and_Magnetism_(OpenStax)/10%3A_Direct-Current_Circuits/10.03%3A_Resistors_in_Series_and_Parallel
two porters are available to carry a long timber wood.out of them one is weak.how to do you make less load to the weak one? write with reason.
Answer:
Please find the answer in the explanation.
Explanation:
Given that two porters are available to carry a long timber wood.out of them one is weak. how do you make less load to the weak one?
We can make the weak one to carry less load through two different ways or means.
First, if we can locate the centre of gravity and centre of mass of the long timbre wood, the week one can carry the other end away from the center of gravity and centre of mass.
Second, the strong porter can carry the long timbre wood almost to the fulcrum and allow the weak one to support at the other end. By doing this, the weak one will only carry light portion of the load.