Answer:
A: High Frequency Wave Wave B: Low Frequency Wave Wave
Explanation:
The high-frequency waves are those that have a range of 3 to 30 MHz and have a longer wavelength that has more energy than a low-frequency wave and the more closer are the crest of the waves the more is frequency.
Low-frequency ranges from 30 to 300 kHz and ranges from 10 to 1 km and is suitable for long-distance communication. Mainly used in aircraft navigation and weather systems.
(Just to help)
Have a good day!
Answer:
A
Explanation:
A force of 50N is applied to a 6 kg object. What is the acceleration of the object?
Answer:
Should be 8.333 m/s^2
Explanation:
50/6 = 8.333
please help! this this timed!!!
Answer:
Thermal heat
Explanation:
The water heats up which it means it is thermal (heat/hot)
(i) 10 m (ii) 20 m (iii) 40 m (iv) 80 m
(c) The maximum potential energy of the object if its mass is 200g 1 mark
(i) 100 J (ii) 120 J (iii) 160 j (iv) 200 J
(d) In the given graph the total mechanical energy will be 1 mark
(i) Same (ii) increases (iii) decreases (iv) will be zero.
(e) In the given graph the kinetic energy 1 mark
(i) Same (ii) increases (iii) decreases (iv) increases then decreases.
Answer:
20m
420=80m
100
increases
increases then decreases
A 1kg skateboard sits at the top of a ramp 20 fr off the ground . How much potential energy does it have ?
Answer:
196J
Explanation:
Given parameters:
Mass of skateboard = 1kg
Height off the ground = 20m
Unknown:
Potential energy = ?
Solution:
The potential energy is the energy due to the position of a body above the ground.
It is mathematically expressed as:
Potential energy = mass x acceleration due gravity x height
Potential energy = 1 x 9.8 x 20 = 196J
which of these statements describe friction
Which below, are the smallest basic units of matter?
molecules
ozone
atoms
vitamin E
A local community has land for a park located along a river. The bank is starting to erode. Citizens want to use ideas based on science to solve the erosion problem. Which idea would best help this community protect the riverbank from eroding?
A. Adding more soil to the bank will protect existing land from eroding away.
B. Watering the bank daily will make existing soil heavier so it will not erode.
C. Building a rock wall along the bank will keep soil in place so water cannot erode it away.
D. Allowing individuals to walk near the edge of the bank will compact the soll so it will not erode,
if there is something other then the answer just comment it.
Answer:
C.
Explanation:
This is to support from being eroded a foundation to that will separate the water from the soil and to avoid it from being eroded.
A circular disc of 0.67 kg mass and radius of 0.3 m rotates with an angular speed of 8 rad/s.
a) Find the moment of inertia of the disc.
b) Calculate the rotational kinetic energy of the disc.
Note: Show the details of your calculations as the final answer alone will not be acceptable.
Answer:
0.67 / 0.3 = 2.23
Explanation:
kg
mass
I REALLY NEED THE ANSWER!!!!
Answer:
vega the first one
pb
p
Explanation:
Compare and contrast the particle motion in each state of matter
Answer:
Gases, liquids and solids are all made up of microscopic particles, but the behaviors of these particles differ in the three phases. ... gas are well separated with no regular arrangement. liquid are close together with no regular arrangement. solid are tightly packed, usually in a regular pattern.
Hope this is fine for youWhat is all cells in a body that arent formed in a reproductive organ???
Explanation:
An organ is made of several types of tissue and therefore several types of cells. For example, the heart contains muscle tissue that contracts to pump blood, fibrous tissue that makes up the heart valves, and special cells that maintain the rate and rhythm of heartbeats.
A .5kg book sits on top of a student's desk which is 9m high. How
much gravitational potential energy does the book have as it sits on the desk?
Answer:
441J
Explanation:
Given parameters:
Mass of book = 5kg
Height = 9m
Unknown:
Gravitational potential energy = ?
Solution:
The gravitational potential energy of a body is the energy due to the position of the body.
It is given as:
Gravitational potential energy = mass x acceleration due to gravity x height
Gravitational potential energy = 5 x 9.8 x 9 = 441J
What are two ways in which ultrasound technology produces images
2. A science book is being pushed across a table. Can the book have a constant speed and a
changing velocity? Explain.
For a particle to execute Simple Harmonic Motion it requires
A. Inertial factor and elastic (spring factor)
B. Torque
C. Inertial factor
D. elastic (spring factor)
Answer:
C
Explanation:
Inertial factor
In a series circuit, the current is _______
at every point around the circuit. Which of the following completes the sentence?
equal
different
In a series circuit, the current is _______
at every point around the circuit. Which of the following completes the sentence?
Answer:In a series circuit, the current is equal at every point around the circuit.
#CARRYONLEARNING #STUDYWELLAnswer:
The option that completes the sentence is;
Equal
Explanation:
A series circuit is a circuit arrangement whereby the components of the circuit are connected in a single chain by joining them end to end, thereby the current flows round the circuit through the singular path of the interconnected component in the circuit and therefore, the current which flows through each component as it flows round circuit, is equal at all points in the circuit.
Therefore, we have that in a series circuit, the current is equal at every point around the circuit.
A person walks 60 meters in 1 minute. Then walks 30 meters in 2 minutes. What is thier average speed over the 3 minute walk?
While driving his sports car at 20.0 m/s through a residential neighborhood, Royston
comes up behind a slow-moving grandma and decides to pass her on the left. If
Royston can accelerate at 6.00 m/s2, how long will it take for him to reach a velocity of
30.0 m/s?
Answer:
1.67s
Explanation:
Given parameters:
Initial velocity = 20m/s
Acceleration = 6m/s²
Final velocity = 30m/s
Unknown:
Time taken = ?
Solution:
Acceleration is the rate of change of velocity with time. It is mathematically expressed as;
Acceleration = [tex]\frac{v - u }{t}[/tex]
v is the final velocity
u is the initial velocity
t is the time taken
6 =[tex]\frac{30 - 20}{t}[/tex]
6 = [tex]\frac{10}{t}[/tex]
10 = 6t
t = 1.67s
The population in the United States in 2015 was 321 million people. It is projected to increase to 438 million people by the year 2050.
If projections are true, the US population will increase
% from 2015 to 2050.
Answer:
Haven't done this but I think it will increase by 73.29% not too anyone correct me if I'm worng
Answer:
C) 20%
Explanation:
The inheritance of genetic traits from parents to children follows predictable rules. Knowing that each parent contributes genes equally to each child, what determines an inherited trait such as eye color? a.Only the interaction between dominant genes. Only the interaction between dominant genes. b.Only the interaction between recessive genes. Only the interaction between recessive genes. c.The interaction between dominant and recessive genes. d.The interaction between dominant and recessive genes. The interaction between dominant and recessive genes does not determine inherited traits. The interaction between dominant and recessive genes does not determine inherited traits.
Answer:
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Explanation:
If a horse ran out of a hospital at 17 miles/hour SOUTHWEST, how far
would the horse go if it ran for 90 minutes?
Answer:
25.5
Explanation:
17/2+17
How Does Exercise Treat Depression?
Answer:
It can help take your mind off of it. and help you get outside and in the world.
Explanation:
PLEASE HELP ME I AM BEGGING YOU :)) 15 POINTS
A student investigated the energy being transferred using the
joulemeter (J).
The reading on the joulemeter was always 20 J lower than the
calculated value.
Name the type of error in the investigation
how much energy must be absorbed by water with a mass of 0.5kg in order to raise the tempature from 30c to 65c
Answer:
62760J
Explanation:
Given parameters:
Mass = 0.5kg = 500g
Initial temperature = 30°C
Final temperature = 65°C
Unknown:
How much energy is absorbed by the water = ?
Solution:
To solve this problem, we use the expression below:
H = m C Δt
H = m x C x (t₂ - t₁ )
m is the mass
C is the specific heat = 4.184J/g°C
t₂ is the final temperature
t₁ is the initial temperature
So;
H = 500 x 4.184 x (65 - 30) = 62760J
In Florida, most of the rocks that are underground are a type of soft, white rock called limestone. If limestone is underwater for a long period of time, it begins to dissolve. Which of these processes most likely causes this change?
A. chemical weathering
B. erosion
C. deposition
D. physical weathering
In Florida, most of the rocks that are underground are a type of soft, white rock called limestone. Long-term submergence in water causes limestone to disintegrate. These processes most likely causes this change is called Physical weathering. Hence, Option D is the correct answer.
What is Physical weathering?Physical weathering is also known as mechanical weathering. It is the weakening of rocks followed by the disintegration due to the physical or mechanical forces including the actions on the rocks by the abrasion, frost chattering, temperature fluctuations and the salt crystal growth. Eventually, after many cooling and heating events, the rocks cracks and break into smaller pieces.
This same mechanical process applies when water freezes and thaws in the cracks of a rock. The chemical composition of the rock, however, remains the same in the process. In Florida, most of the rocks that are underground are a type of soft, white rock called limestone. Long-term submergence in water causes limestone to disintegrate.
These processes most likely causes this change is called Physical weathering. Hence, Option D is the correct answer.
To know more about limestone,
brainly.com/question/15148363
#SPJ2
I need help ASAPP
Thanks+ BRAINLIST only for correct answer for these questions.
Which among the following forms of electromagnetic waves has the highest frequency range?
O Microwave
O Radio waves
O X-ray
O Ultraviolet
Radio waves carry information from a broadcasting station to your radio or television.
-visible light
- sound
-X -ray
- gamma ray
Answer: For the first part the answer is Radio Waves and the second part’s answer is gamma ray.
Can someone help me with this last question
A 30 kg child is in an elevator accelerating down at a rate of -5 m/s2.
a. Calculate the force of gravity on the child.
Answer:
The force is - 150 N
Explanation:
F = 30 • - 5 = - 150
A boy is running at -8 m/s and a girl running at -2 m/s. Who is running faster? How do you know?
Answer:
the girl is running faster because -2 is greater than -8
Explanation:
Which of the following agricultural advancements have had unforeseen adverse effects?
synthetic fertilizers wiping out nearby crops
irrigation causing damaging floods
hybrid plants causing cancer to consumers
use of pesticides increasing insect resistance
Answer:
use of pesticides increasing insect resistance
Explanation:
Pesticides are the chemicals used to kill or stop the growth of insects or pests in crops and plants.
Pesticides are used from a very long time and repeated use of same pesticide allowed insects to get use to of it and evolve themselves in a way that they become resistant to these pesticide, so pesticide do not have any effect on insects.
Hence, the correct answer is "use of pesticides increasing insect resistance".
Answer:
use of pesticides increasing insect resistance
Explanation: