Answer:
2.25 m
50 N
Explanation:
Given :
[tex]m=10 g=0.01 kg[/tex]
Initial velocity =U= [tex]150 \ ms^{-1}[/tex]
[tex]Time=t=0.03\ s[/tex]
Final velocity =v=0
We know that
[tex]V=U + at[/tex]
[tex]a\ =\ \frac{V-U}{t}[/tex]
Putting the value of V,U and t in the previous equation we get
[tex]a=\frac{0-150}{0.03} \ \\a=-5000 ms^{-2}[/tex]
According the second law of motion
[tex]s=Ut+\frac{1}{2} *\ at^{2}[/tex]
Putting the value of U,t and a we get
[tex]s=150\ *\ 0.03\ +\frac{1}{2} \ *(-5000)\ * 0.03\ *0.03\\s=2.25\ m[/tex]
We know that
[tex]F=mass * acceleration\ \\F=0.01 * 5000\ \\F=50 N[/tex]
Distance of penetration is 2.25 mThe magnitude of the force Is :50 N
The householder installs cavity wall insulation. What would happen to the time taken for the temperature to fall between points A and B?
The time taken decrease
The time taken increases
The time taken stays the same
Answer:
the answers the correct one is: the time increases
Explanation:
When an insulating material is placed in the cavity of a wall the thermal conductivity of the system increases, therefore the temperature changes take longer.
P= dQ / dt = K A dT / dx
when placing insulation the value of k is less
When reviewing the answers the correct one is: the time increases
Transformer is being designed to have 600v output with a 120volt input. If there are to be 800 turns of wire in the input coil. How many turns must there be in the output?
A. 40
B. 400
C. 4000
D. 40000
Hi there "Princess "
Here is ur answer
How wood helps in home insulating?
Please answer fast
Answer:
Wood helps in home insulating because logs have both a proper structure and insulation. Since the log has so much heat storage, its huge mass will have a lot more thermal energy than other materials for insulating.
Evaluate (x +y)0 for x= -3 and y=5.
0 1
2
01
Answer:2.01201
Explanation:
A cyclist and bike have a combined weight mass of 99 kg. Show that the combined mass weight is 990N
Answer:mass =99kg force=990N
Explanation:From f=mg where g=10m/s. Therefore f=99*10=990N
Your cardiovascular system gets better when you increase the time and intensity of your workouts. What should the word in italics be replaced with to make this sentence more precise?
Answer: The word better should be replaces with stronger and efficient.
Explanation:
The cardiovascular system of the body works better if the the body id performing intense workout and the heart becomes more efficient.
The workout sessions provides more oxygen to the heart which makes it stronger and provides more oxygen to the vital organs of the body.
There are less chances of occurring the problems related to the cardio vascular system of the body such as high blood pressure, blockage, et cetera.
What is the advantage of using multiple cylinders in an engine?
Answer:
Temperature stresses are reduced as the multi-cylinder engine has more cooling surface area due to smaller cylinder bore. The intensity of vibration is sufficiently reduced as the primary and secondary forces are balanced. More power strokes per revolution giving smooth torque output.
Explanation:
a bowl of soup has_____? A:both PE and KE B:PE C:neither PE or KE D:KE
Answer:
A.
Explanation:
I need help with the Reasoning to support my claim please.
Question 1
a. Name each of the laboratory equipment labelled V to Z. (5 marks)
b. Mention one use of each of the laboratory equipment
identified in question 'a' above. (5 marks)
Answer:
a. All the laboratory equipment given are very basic equipment used in all the laboratories. Name of each equipment is as follows:
V refers to the tape measure.W refers to dropper.X refers to an inoculating loop.Y refers to a stopwatch.Z refers to the microscope.b. Use of each laboratory equipment identified is:
Tape measures (V) is used to measure the length of objects or distance in a laboratory.Dropper (W) is used to measure unit of drop required to dispensed as one drop or several drops in any experiment.Inoculating loop (X) is used by microbiologists to cultivate microbes on plates and retrieving an inoculum from a culture of microorganisms. Stopwatch (Y) is used to measure the time of any experiment.Microscope (Z) is used to magnify an object to look at it in detail.What is the energy of a photon with a frequency of 2.2 x 1016 Hz? Planck's constant is 6.63 x 10-34 Jos.
O 1.5 x 10-17
8.8 x 10-17
O 1.5 10-16
O 8.8 10-16
Answer: 1.5 × 10^-17
Explanation:
Given the following :
Frequency(f) = 2.2 × 10^16 Hz
Planck's constant(h) = 6.63 × 10^-34
The energy of a photon 'E' is given as the product of frequency and the planck's constant
E = hf
E = (6.63 × 10^-34) × (2.2 × 10^16)
E = 6.63 × 2.2 × 10^(-34 +16)
E = 14.586 × 10^-18
E = 1.4586 × 10^-17
E = 1.5 × 10-17 (2 S. F)
Answer:
C. 1.5 × 10–16 J
Explanation:
Calculate the potential energy of a mass of 5kg raised 4m above the
ground. (g = 10m/s)
Your answer
Answer:
Potential energy = mass × gravity × height
= m × g × h
mass = 5 kg
height = 4m
g= 10m/s²
Potential energy = 5 × 10 × 4
= 200Joules
Hope this helps.
Complete the sentence to describe what a wave is and what it does.
A wave is a
that carries
from one place to another.
Answer:disturbance
A wave is a disturbance that carries energy from one place to another.
Explanation:
edg2020
Answer:
its disturbance and energy for short
Explanation:
a material that is not a mixture; it has the same properties all the way through is called. Its 9 letters long and the second letter is u and the eighth letter is c. Its a crossword clue by the way
Answer: The material that is not a mixture; it has the same properties all the way through is called a substance.
Explanation:
A pure substance is a form of matter that has a constant composition and properties that are constant throughout the sample. Hence, it cannot be separated by physical means. Example: Gold
Mixture is a substance which has two or more components which do not combine chemically and do not have any fixed ratio in which they are present. They can be separated by physical means as well. Example: Air
Thus the material that is not a mixture; it has the same properties all the way through is called a substance.
TV broadcast antennas are the tallest artificial structures on Earth. In 1987, a 72.0 kg physicist placed himself and 400 kg of equipment at the top of one 610 m high antenna to perform gravity experiments. By how much was the antenna compressed, if we consider it to be equivalent to a steel cylinder 0.150 m in radius. a)190 km
b)190 cm
c)190 mm
d)190 μm
Answer: 190μm
Explanation:
Given the following :
Mass of physicist (m1)= 72kg
Mass of equipment(m2) = 400kg
Height of antenna (L) = 610m
Radius(r) = 0.150
Youngs modulus of steel = 2 × 10^11 Nm^-2
Recall the young's modulus(y) formula :
Y = stress / strain
Stress = force (F) / area(A)
Strain = extension(E) / length (L)
Y = (F/A) ÷ (E/L)
Y = F/A × L/E
Y = FL /AE
Y × AE = FL
E = FL / YA
Area(A) = πr^2
A = π × 0.150^2 = 0.070695m^2
Force (F) = mg
(400 + 72) × 9.8m/s^2 = 4625.6N
THEREFORE :
E = (4625.6 × 610) / (2 × 10^11 × 0.070695)
E = 2821616 / 0.14139 × 10^11
E = 2821616 / 14139000000
E = 0.00019956262819152
E = 0.0001995
E = 1.995 × 10^-4m = 199.5 × 10^-6
Approx E = 190μm
Water waves are generated every 5 seconds at a swimming pool. What is the frequency of these waves in Herts?
Answer:
0.2 Hz
Explanation:
Frequency = no. of waves in 1 second
1 wave produced in 5 seconds
1/5 waves are produced in 1 second
Therefore No. of waves in 1 second = 0.2 waves
therefore frequency is 0.2 Hz
Hope it helps...
Arden is making a pros and cons list about genetic engineering for a debate at school. Which part of her list is incorrect?
Pros Cons
Pro 1: Can be used to make medicine Con 1: Genetically modified organisms can affect the environment around them Pro 2: Can create organisms that survive in different environments Con 2: The edited gene is more likely to mutate and cause disease
Pro 1 Pro 2 Con 1 Con 2
Answer:
Con 2
Explanation:
The part of Arden's list that is incorrect would be con 2, that edited gene is more likely to mutate and cause disease.
Genetic engineering is the science of modifying the gene of organisms through the process of biotechnology in order to serve specific needs.
Genetic engineering has a wide variety of applications, including the production of vaccines and drugs in medicine and improved breeds of organisms in agriculture.
However, genetically modified organisms sometimes present ecological and or genetic problems. They can alter the dynamics of population in the environments where they are introduced, affect gene flow, and affect biogeochemistry of the environment.
Edited genes in genetically modified organisms have the same chances of mutation just like every other gene. That a gene is edited does not make it more likely to mutate and cause disease.
Answer:
Con 2
Explanation:
I took the test and got it correct
A wave has a frequency of 450 Hz and a wavelength of 0.52 m. What is the speed of the wave?
Answer:
Explanation:
ave speed is always (frequency) x (wavelength)
Speed = (450 /sec) x (0.52 m)
= 234 m/sec .
what are 3 major areas of society affected by science
Answer:
Science and technology have had a major impact on society, and their impact is growing. By drastically changing our means of communication, the way we work, our housing, clothes, even the length, and quality of life itself, science has generated changes in the moral values and basic philosophies of mankind.
Explanation:
The total distance from a house to a school to is 9.5 km. A student travels all the way from his house to the school and back to his house again. The displacement during this journey is:
9.5 km
19 km
0
explain your answer
Answer:
0
Explanation:
Displacement is a vector from initial to final point. Because initial and final point are the same, so displacement is 0.
A stone is dropped from a tower of height 3600cm.Find the velocity by which it strike the ground.Also,find the time taken to reach the ground.
Answer:
Explanation:
Here h=36m, a=g=10m/s, u=0
Use s=ut+(1/2)at^2
36=0*t+(10t^2)/2
time=2.68 sec
As from the formula of final velovity, v=(2gh)^1/2
v=(2*10*36)^1/2
v=(720)^1/2
v=26.83………This is the final velocity
Answer:
Explanation:
s = vit + 1/2 gt*2
36 = 0 + 1/2 x 9.8 x t*2
t*2 = 7.34
t = 2.7sec
now,
2gs = vf*2 - vi*2
2 x 9.8 x 36 = vf*2 - 0
vf*2 = 705.6
vf = 26.5m/s
As a liquid is added to a beaker, the pressure exerted by the liquid on the bottom
of the beaker
A decreases
B stays the same
C increases
Answer: c) increases
Explanation:
Pressure increases with decreasing height
Henri draws a wave that has a 4 cm distance between the midpoint and the trough. Geri draws a wave that has an 8 cm vertical distance from the bottom of the trough to the top of the crest. Which statement best describes the energy in Henri and Geri’s waves? Henri’s wave has a higher amplitude and more energy. Henri’s wave and Geri’s wave have the same amplitude and the same energy. Henri’s wave and Geri’s wave have the same amplitude, but Geri’s has more energy. Geri’s wave has a higher amplitude and more energy.
Answer:
Henri’s wave and Geri’s wave have the same amplitude and the same energy
Explanation:
The amplitude of a wave is the distance between the midpoint and the trough (or the crest). This is equivalent to half the distance between the trough and the crest. Therefore:
amplitude of Henri's wave: 4 cmamplitude of Geri's wave: 8/2 = 4 cmThe energy of a wave is directly proportional to its amplitude.
Answer:
its letter b
Explanation:
A bus starting from rest moves with a uniform acceleration of 0.1 m s -2 for 2 minutes. Find (a) the speed acquired, (b) the distance travelled.
Answer:
S=720m anf vf=12m/s
Explanation:
acceleration=a=0.1m/s²
time taken=t=2minutes=2×60=120seconds
vi=0m/s
vf=?
distance covered=S=?
by using second equation of motion
S=vit+1/2at²
S=0m/s×120seconds+1/2(0.1m/s²)(120s)²
S=0m/s+1/2×1440m
S=720m
and now we have to find the vf
vf=vi+at
vf=0m/s+(0.1m/s)(120s)
vf=12m/s
i hope it will help you
Find the average velocity if the takeoff velocity of an airplane on a runway is 300 km/hr with an acceleration of 1 m/s2 . A) 30 sec B) 41.7 sec C) 72.2 sec D) 83.33 sec
Answer:
83.33s
Explanation:
velocity=300km/hr ,acceleration =1m/s2
But before we can make this calculation,we have to make sure that both the acceleration and velocity are in the same units.So I decided to Chang the velocity to m/s.
Converting 300km/hr into m/s;
Changing 300km into m=300000m
Changing 1hr into secs=3600sec
Velocity in m/s=83.33m/s
But Time =velocity/acceleration
=83.33/1
=83.33sec
You have to decide what you want. Your question says "Find the average velocity", but the choices you listed are all times, not velocities.
(300 km/hr) x (1 hr / 3600 sec) = 83.33 meters/sec
-- If the airplane starts from rest and accelerates uniformly at 1 m/s², it'll take 83.33 seconds to reach takeoff speed.
-- If it starts from rest and accelerates uniformly to 83.33 m/s, then its average speed is 41.67 m/s no matter what its acceleration may be.
Physics students study a piano being pulled across a room on a rug. They know that when it is at rest, it experiences a gravitational force of 2200 N. When it is being pulled with 1200 N it is sliding across the room in equilibrium, but the students feel like they had to pull harder than 1200 N at first to begin motion.
Answer:
4
Explanation:
hope this helps
Answer:
The static frictional force is greater than the kinetic frictional force, so the static frictional force is greater than 1200 N.
Explanation:
Edge 2021
what is electrophorus's relation with gold leaf electroscope
Answer:
i don't now soooooooory
it is easier to chop with a sharp knife then with a blunt one
Answer:
Explanation:
The pressure exerted by the sharp knife edge is more than that exerted by the blunt one because the area on which force is exerted with a sharp knife is very small. Thus, it is easier to cut with the former than with the latter.
hope it helps
I NEED HELP PLEASE, THANKS! :)
Explain how surface waves can have characteristics of both longitudinal waves and transverse waves.
Explanation:
Usually when we think of waves, we think of transverse waves. These are waves where points move up and down perpendicular to the motion of the wave. Examples include water waves, whipping a rope, or even doing the "wave" in a crowd. You can think of these as "two dimensional" waves.
Longitudinal waves are waves where points move left or right, parallel to the motion of the wave. In other words, there is compression and expansion of the medium. Examples include sound waves, or pulses in a slinky.
An 80-kg hiker climbs to the top of a tall hill and builds up 470,000 J of gravitational potential energy. How high did the hiker climb? meters
Answer:
599 meters is the answer rounded to the nearest whole number and 599.489795918 meters is the complete answer
Explanation:
to find gravitational potential energy you multiply mass x acceleration due to gravity (always 9.8 on earth) x hight
since we know the gravitational potential energy and want to find out the hight, we take the gravitational potential energy (470,000) and divide it by the product of acceleration due to gravity x mass (9.8 x 80)
so how high the hiker climbed is equal to 470,000 divided by (9.8 x 80)
hight = 470,000 / (9.8 x 80)
hight = 470,000 / 784
hight = 599.489795918 meters
as for rounding, if the decimal is less than 5 you round "down" and keep the current whole number, if the decimal is 5 or greater you round "up" and add 1 to get your new number
Answer:
actually its 600
Explanation:
on edge2020
