Answer:
The great thing about exercise is that it’s never too soon or too late to start. Fitness can support healthy growth and development in children and reduce the risk of cognitive decline and delay the onset of dementia in older people. You don’t have to join a gym or spend lots of money on equipment to get fit.
Explanation:
Can we determine what causes change and what are the effects on living and non-living systems?
Answer:
Life Science Living things cause changes on Earth. Living things function and interact with their physical environments. Living things cause changes in the environments where they live; the changes can be very noticeable or slightly noticeable, fast or slow.
Explanation:
Please mark me as brainliest
why does one end of a nail is wide while the other end is sharp?
How do scientists use the evidence they gather?
A. The evidence helps scientists write new laws for people to follow.
B. The evidence helps scientists come up with explanations about
the natural world.
C. The evidence proves that scientists are always right.
D. The evidence supports scientists' personal opinions about politics.
SUNT
Answer: B
The evidence helps scientists come up with explanations about
the natural world.
When making a research, scientists use the scientific method to collect enough evidence in an experiment related to a hypothesis, the results aiming to support or contradict a theory.
Ella has 80 marshmallows and she gives some to her friend. how many marshmallows did Ella give her friend? She now has 65 marshmallows.
Answer:
15 marshmallows to her friend.
Explanation:
Answer:
80 - 65 = 15
Explanation:
Ella starts off with 80 then gives some to her friend. She now has only 65 meaning she lost 15 marshmallows. Therefore we would do 80 - 65 = 15.
What is the weight of a 215 kg moose?
didn't you just say it's 215
Answer:
Explanation:215 Kilograms =
473.99386 Pounds
(rounded to 8 digits)
How is the potential energy effected as a ball lying on top of a 20 m tall building rolls down to the next
building which is 10 m tall
Answer:
Since the gravitational potential energy of an object is directly proportional to its height above the zero position, a doubling of the height will result in a doubling of the gravitational potential energy. A tripling of the height will result in a tripling of the gravitational potential energy.
A substance with high specific heat heats and cools quickly.
TRUE
FALSE
Answer:
False
Explanation:
Something with high specific heat cooling down would take longer to heat up.
A ball is thrown vertically upward with an initial velocity of 29.4 meters per second. What is the maximum height reached by the ball?
Answer:
The maximum height reached is approximately 44.1 meters
Explanation:
The upward (vertical) velocity of the ball = 29.4 meters per second
The equation of the vertical motion of the ball under gravity, is presented as follows;
v² = u² - 2 × g × s
Where;
v = The final velocity of the ball = 0 at maximum height
u = The initial vertical velocity with which the ball was thrown= 29.4 m/s
g = The acceleration due to gravity ≈ 9.8 m/s²
s = The height reached by the ball = [tex]s_{max}[/tex] at maximum height
∴ 0 = 29.4² - 2 × 9.8 × [tex]s_{max}[/tex]
29.4² = 2 × 9.8 × [tex]s_{max}[/tex] = 19.6·[tex]s_{max}[/tex]
[tex]s_{max}[/tex] = 29.4³/19.6 = 864.36/19.6 = 44.1 meters
[tex]s_{max}[/tex] = The maximum height reached = 44.1 meters.
The maximum height reached by the ball is 43.2 meters.
Using the formula:
v² = u² + 2gH
where v is the final velocity, u is the initial velocity, g is the acceleration due to gravity and H is the height.
At maximum height, v = 0. Given that u = 29.4 m/s, g = -10 m/s (moving upward). Hence:
0² = 29.4² + 2(-10)H
20h = 29.4²
h = 43.2 meters
The maximum height reached by the ball is 43.2 meters.
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What was the narrator referring when he said that the flood risk to tokyo sounded like something out of a disaster movie?
Answer:
A flood could hit Tokyo so quickly that the levee could break. In a short amount of time, this breach, or break, could cause severe damage to Tokyo’s infrastructure, like a flood in a Hollywood disaster movie. Because Tokyo is home to a large population, a flood could cause massive damage to homes, businesses, and life.Explanation:
Please answer correctly.
Will give the brainliest!
Urgent!!!
Answer:
A. Piccolo
B. The flute would usually have the highest pitch, but because the piccolo is half the size of a flute, it's higher pitched. The piccolo in C has a range from D5 – C8 which is pretty high pitched. This means that the piccolo's range is an octave above that of the flute.
C. The human ear naturally picks out higher notes, so when piccolos play extremely high, we can hear them more easily than the other instruments in a band or orchestra.
D. I'm sorry but I don't know this one.
A rock is thrown downward from the top of a cliff with an initial speed of 12 m/s. If the rock hits the ground after 2.0 s, what is the height of the cliff?
The required height of the cliff is 4.4 m.
Given data:
The magnitude of initial speed of rock is, u = 12 m/s.
The time interval of hitting is, t = 2.0 s.
The given problem is clearly resolved using the concept and fundamentals of second kinematic equation of motion. As per the second kinematic equation of motion we have,
[tex]h =ut+\dfrac{1}{2}(-g)t^{2}[/tex]
Here,
h is the height of cliff.
g is the gravitational acceleration.
Solving as,
[tex]h =(12 \times 2)+\dfrac{1}{2}(-9.8) \times2^{2}\\\\h = 4.4\;\rm m[/tex]
Thus, we can conclude that the required height of the cliff is 4.4 m.
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Which line on the graph represents the accumulation of stable atoms during the decay of a radioactive substance?
Answer:
B. Orange Line
Explanation:
Edge 2021
Describe the motion of the box:
A)The box will not move because the forces acting on the box are balanced.
B)The box will move 75N to the right, because the forces are unbalanced.
C)The box will move 75N to the left, because the forces are unbalanced.
Answer:
B
Explanation:
because that's the answer
A ball is thrown vertically upward with an initial velocity
of 29.4 meters
per
second. What is the maximum height
reached by the ball? [Neglect friction.]
O a
29.4 m
O b
14.7 m
O c
88.1 m
O d
44.1 m
Answer:
D
Explanation:
First we define our variables
V0=29.4
a=-9.8
V=0
We have to find the maximum displacement , which I will define as X
We use formula v^2=v0^2+2aX
All we do is substitute our values
0=29.4^2-19.6X
29.4^2=19.6X
X=29.4^2/19.6=44.1
nm
m
s
7 km
ug um t
kg
ms
mg ns us g mm
Arrange the above units in three columns as below.
The units in each column should be in order, with the
largest at the top.
mass
length
time
largest →
unit
Tides can be used to convert kinetic energy into what kind of energy?.
Answer:
As most economies witness rapid expansion, demand for power is projected to increase significantly. Though most economies have invested in fossil fuels, renewable and sustainable sources present great possibilities for cheap and reliable electricity. One energy resource that ranks among the top renewable and sustainable sources is tidal energy.
Tidal energy or tidal power is a form of renewable energy obtained due to alternating sea levels. The kinetic energy from the natural rise and fall of tides is harnessed and converted into electricity. Tides are caused by the combined gravitational forces of the moon, sun, and earth. However, tides are influenced most by the moon. The moon’s gravitational force is so strong that it tugs the ocean into a bulge. The high and low tides create tidal currents, which are essential in the generation of this kind of energy, mostly prevalent in coastal areas.
Based on Newton’s law of universal gravitation, complete the following table. Distance increases mass increases distance decreases mass decreases.
When mass increases and distance reduces, gravity rises. Gravity also lowers when the distance between two points grows and the mass decreases.
What is Newton's law of gravitation?Newton's law of gravity states that each particle having mass in the universe attracts each other particle with a force known as the gravitational force.
Gravitational force is proportional to the product of the masses of the two bodies and inversely proportional to the square of their distance.
When mass increases and distance reduces, gravity rises. Gravity also lowers when the distance between two points grows and the mass decreases.
Hence we may deduce that when mass rises and distance reduces, gravity increases. Gravity also lowers when the distance between two points grows and the mass decreases.
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Potential energy is the energy an object has because of its
A net torque of magnitude 600 Nm is ex-
erted on the rotor of an electric generator for
31 s.
What is the magnitude of the angular mo-
mentum of the rotor at the end of 31 s if it
was initially at rest?
Answer in units of kg mº/s.
2
Find the mass of 250 mL of water. The density of water is 1 g/mL.
Answer:
The answer is 250 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volumeFrom the question
volume = 250 mL
density = 1 g/mL
So we have
mass = 250 × 1
We have the final answer as
250 gHope this helps you
Wave length of a infra red wave
Answer:
780 nm - 1000 µm.
Explanation:
i surched it up
Which statement is a description of Charles's law?
The temperature and volume of a gas are directly proportional when pressure is constant.
• The temperatung and volume of a gas are inversely proportional when pressure is constant.
The volume and pressure of a gas are directly proportional when temperature is constant.
O The volume and pressure of a gas are inversely proportional when temperature is constant.
Answer:
the temperature and volume
Photosynthesis Assignment
Use the diagram below to show the cycle of photosynthesis. Include the Sun or energy, carbon dioxide, chlorophyll, water, oxygen and glucose or carbohydrates. Show what happens to each of the elements in carbon dioxide, oxygen and water. Use arrows to show the movement of the substances and label the arrows.
Here are the ways.
First sunlight enters leaves' chlorophyll .Water comes through rootsCarbon dioxide from atmosphereAll combine to form carbohydrates and oxygen After evaporation the tree releases water to atmosphere.Which comes down as rainFirst sunlight enters leaves' chlorophyll . Water comes through roots and Carbon dioxide from atmosphere. All combine to form carbohydrates and oxygen. After evaporation the tree releases water to atmosphere which comes down as rain.
What is photosynthesis?Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's activities.
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#SPJ2
Which does not utilize the gyroscope effect?
Question options:
a spiral pass in football
a spinning top
a flying plastic disk
a magnetic compass
A guitar string vibrates with an unknown frequency. If the the guitar string is played along with a 440 Hz tuning fork, a beat frequency of 5 Hz is heard. What are the possible frequencies the guitar string could be vibrating at?
This question involves the concept of the beat frequency.
The possible frequencies of the guitar string could be "445 Hz" (or) "435 Hz".
Beat FrequencyWhen two sounds with a very minor difference in their frequency are played, they produce a frequency equal to the absolute value of the difference between their frequencies. This frequency is known as beat frequency.
[tex]f_b=|f_1-f_2|[/tex]
where,
[tex]f_b\\[/tex] = beat frequency = 5 Hzf₁ = frequency of first guitar string = 440 Hzf₂ = possible frequencies of other string = ?Therefore,
5 Hz = |440 Hz - f₂|
f₂ = 440 Hz ± 5 Hz
f₂ = 445 Hz (OR) 435 Hz
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A sound wave is produced when a medium begins to .
A sound wave is produced when a medium begins to vibrate. When an entity vibrates, a pressure wave is formed, which causes sound.
What is a sound wave?When an object vibrates, a pressure wave is created, which produces sound. The particles in the surrounding medium (air, water, or solid) vibrate as a result of the pressure wave.
The vibrations of the particles move nearby particles, allowing the sound to travel further through the medium.
Hence a sound wave is produced when a medium begins to vibrate.
To learn more about the sound wave refer to the link;
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Answer:
vibrate
Explanation: slaaauyy
What type of image is produced when the object is closer to the lens than the focal point?
diminished or enlarged
virtual or real
upright or inverted
Explanation:
Real images are those where light actually converges, whereas virtual images are locations from where light appears to have converged.
If an object has two forces acting on it, how can the net force equal zero?
Physical Science
Answer:
If they have the same net force
Explanation:
Explanation: The net force is the total amount of force acting on an object. It becomes 0 when the forces are equal, canceling each other out (or balancing them - same thing).
Select the correct answer. What do scientists use to determine the temperature of a star? A. Thermometer B. Distance from Earth C. Composition D. Color.
Answer:
Color
Explanation:
Thus, for stars, considering them as “black bodies”, we can get an approximate figure for their temperature by measuring their dominant frequency (color). Technically scientists measure the brightness of the blue light and that of red light from the star, and from this they can calculate the temperature of the star.
Answer: color answer D
Explanation:
How is the centripetal force related to the tangential velocity of the mass?.
Answer:
The force is proportional to the square of the tangential velocity of the mass. How many different masses are we going to perform this experiment with?
Explanation: