what is meant by heat energys
Answer:
heat energy is the form of energy produced by heat
when we burn heat a type of enery is came
The evaporation of the oceans surface water as part of the water cycle is a process caused by A) Magnetism B) axial tilt C) solar radiation D) Earth's gravity
Answer:
(C) Solar radiation
Explanation:
The water cycle is driven by solar energy that produces solar radiation and this drives water from ocean surface , rivers, lakes, soil and plants through transpiration , which then forms clouds and water falls back on earth as precipitation.
Answer:
c i took the test
Explanation:
How could sound waves damage solid objects like a spacecraft?
A student tries to measure the period of a pendulum that is already swinging
left and right. At the moment when the pendulum is fully to the left, she
counts 'One' and starts a stopwatch. She counts successive swings each time
that the pendulum returns to the left. When she counts ‘Ten' she stops the
stopwatch, and sees that it reads 12.0 s.
a. What was her mistake?
______________________________________________________________
b. What is the period of swing of this pendulum?
______________________________________________________________
c. In this particular experiment, explain the likely effect of her reaction time
on her answer.
Answer:
a. The student's mistake was that the student did not swing the pendulum and start the watch at the same time.
b. 1.2 s per swing.
c. The likely effect of her reaction time is that they will should subtract two seconds off the time.
Explanation:
The pupil made the error of not simultaneously starting the watch and swinging the pendulum.
What is pendulum?Pendulum is defined as a body that is suspended from a fixed point and moves back and forth while being pulled by gravity. The pendulum is used to gauge the gravitational pull because the force of gravity causes it to swing back toward its average position. A pendulum's time period can be used to tell the time because it is constant.
The swing of the pendulum is 1.2 sec. per swing. They should take two seconds off the timing due to her presumably slow reaction time. A pendulum's total time should be divided by the quantity of oscillations in order to determine its time period. When compared to a pendulum with a shorter string, the one back and forth cycle of a longer-stringed pendulum requires more time to complete.
Thus, the pupil made the error of not simultaneously starting the watch and swinging the pendulum.
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Students in a science class were provided with this image and asked to identify which color of light would refract the most if white light was passed through a prism?which student below identified the correct color of light with the proper justification?
The identification of the correct color of the light with the proper justification would be by student 4: violet, because it has the highest frequency, therefore the correct answer is option D.
What is Wavelength?It can be understood in terms of the distance between any two similar successive points across any wave for example wavelength can be calculated by measuring the distance between any two successive crests.
As given in the problem, students in a science class were provided with this image and asked to identify which color of light would refract the most if white light was passed through a prism.
Student 4 would correctly identify and justify violet as the appropriate hue of the light since it has the greatest frequency, making option D the right response.
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A dryer runs on 240 V with a resistance of 30.0 Ω. What is the current of the dryer?
Answer:
Current, I = 8 Amps
Explanation:
Ohm's law states that at constant temperature, the current flowing in an electrical circuit is directly proportional to the voltage applied across the two points and inversely proportional to the resistance in the electrical circuit.
Mathematically, Ohm's law is given by the formula;
[tex] V = IR[/tex]
Where;
V represents voltage measured in voltage.
I represents current measured in amperes.
R represents resistance measured in ohms.
Given the following data;
Resistance, R = 30 ohms
Voltage, V = 240V
To find the current;
[tex] I = \frac {V}{R} [/tex]
[tex] I = \frac {240}{30} [/tex]
Current, I = 8 Amps
Therefore, the current of the dryer is 8 Amperes.
Q2 ) Starting from rest on a level road a girl can reach a speed of 5m/s in 10 s on her bicycle, find
A) the acceleration
Answer:
0.5m/s²
Explanation:
Given parameters:
Initial velocity = 0m/s
Final velocity = 5m/s
Time taken = 10s
Unknown:
Acceleration of the bicycle = ?
Solution:
Acceleration is the rate of change of velocity with time.
Acceleration = [tex]\frac{v - u}{t}[/tex]
v is the final velocity
u is the initial velocity
t is the time taken
Insert the parameters and solve;
Acceleration = [tex]\frac{5-0}{10}[/tex] = 0.5m/s²
I need help and I don't understand if you can help me but let it be before 6:00
Answer:
balanced: a train moving at a constant speed, the moon orbiting the earth at a constant speed, a lamp sitting on a desk, an apple hanging on a tree
unbalanced: a skier coming down a mountain, a car accelerating from the start line, a soccer ball after it was kicked, a parachuter falling to ground
Explanation:
all the balanced ones are either moving at a constant speed or are skill
all the unbalanced ones were disturbed by some sort of force causing them to accelerate, go faster, blah blah blah
a metal has a density of 8.0g/cm3 a solid cube of mass 1.0kg is made from this metal how long is each side of the cube?
Answer:
5 cm
Explanation:
We are given that,
The density of metal = 8 g/cm^3
The Mass of the Solid Cube = Mass of the metal = 1 kg = 1000 g
We know that,
Density = Mass / Volume
8 = 1000 / V
[tex]V = 1000/8\\V = 125 cm^3[/tex]
Hence, as the volume of the solid cube is 125 cm^3, its side will be the volume's cube root which is 5 cm
Lorries sometimes have a curved metal sheet fitted on top of the cab. Explain why as fully as you can ?.
Explanation:
A vehicle frame, also known as its chassis, is the main supporting structure of a motor vehicle to which all other components are attached, comparable to the skeleton of an organism.
Until the 1930s, virtually every car had a structural frame separate from its body. This construction design is known as body-on-frame. Over time, nearly all passenger cars have migrated to unibody construction, meaning their chassis and bodywork have been integrated into one another.
Nearly all trucks, buses, and most pickups continue to use a separate frame as their chassis
*
4. True/False: At the aphelion there is the STRONGEST gravitational pull.
10 points
True
False
i think the answer is true i hope u get it correct
What clouds are best associated with thunderstorms?
Answer:
Cumulus Congestus & Cumulonimbus Clouds
A block of cheese Bhangs from the ceiling by rope 1 A wheel of cheese Whangs from the block of
cheese by rope 2
What is the correct free body diagram for the block of cheese B?
URGENT
Answer:
Explanation:
KHAN ACADEMY
The correct free body diagram is option (B). There will only be two forces acting on cheese B.
Given that Cheese B hangs on rope 1. The weight of the cheese is balanced by the tension force on the rope. That is, the cheese experiences a force in the upward direction due to the tension on rope 1.Similarly, a wheel of cheese W hangs from block B by a rope 2. This rope has a tensional force that is balanced by the weight of the cheese W. This causes a downward pull on block B due to the tension on rope 2.By representing the tensional forces by the ropes 1 and 2 as [tex]F_{T1}[/tex] and [tex]F_{T2}[/tex] respectively, the correct free body diagram will be option B.
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an airplane flies 1,592 miles east from arizona to georgia in 3.68 hours. what is the average velocity of the airplane
Answer: Around 433 miles
Explanation:
A boy threw a small bundle toward his girlfriend on a balcony 10.0 meters above him.the bundle stooped rising in 1.5 seconds.how did the bundle travel ?
I need help asappp!!! Help b trcrcrhhvvcc
Answer:
the answer is c. hope this help you out
A 45 kg puggle and a 130 kg puma are at a standoff (staring at each other) with a distance 70 m between them. What is the magnitude of the force of gravity between the puggle and the puma?
Answer:
It should be normal force if it's not right plz forgive me.
Explanation:
The force of gravity between the puggle and the puma is 7.7×10⁻¹¹ Newton.
Given parameters:
Mass of the puggle; m =45 kg
Mass of the puma : M = 130 kg.
Distance between them; r = 70 m.
Then, the magnitude of the force of gravity between the puggle and the puma is; F = GmM/r²
Where, G = universal gravitational constant = 6.6×10⁻¹¹ Si unit.
So, Gravitational force; F = ( 6.6×10⁻¹¹ )×130×45 ÷ (70)² N = 7.7×10⁻¹¹ Newton.
Hence, the magnitude of the force of gravity between the puggle and the puma is 7.7×10⁻¹¹ Newton.
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answer them all please!!
Answer:
Digestive = large instestine
respiratory = lungs
circulatory red blood cell
neurons=nerves
Explanation:
6.) A car traveling 30 m/s north has a momentum of 60,000 kg m/s. What is the mass of the car?
please help!! answer and equation would b great!!
Answer:
The answer is 2000 kgExplanation:
The mass of the car can be found by using the formula
[tex]m = \frac{p}{v} \\ [/tex]
p is the momentum
v is the velocity
From the question we have
[tex]m = \frac{60000}{30} = \frac{6000}{3} \\ [/tex]
We have the final answer as
2000 kgHope this helps you
A ball is thrown vertically upwards with a velocity of 9.8 m/s. Its velocity after 1 second will be
[ Take g = 9.8 ms¯²]
9.8 m/s
19.6 m/s
Zero
2.45 m/s
[tex] \LARGE{ \underline{\underline{ \purple{ \bf{Required \: answer:}}}}}[/tex]
GiveN:
Initial velocity = 9.8 m/s²Accleration due to gravity = -9.8 m/s²Time taken = 1 sTo FinD:
Final velocity of the ball?Step-by-step Explanation:
Using the first Equation of motion,
⇒ v = u + gt
⇒ v = 9.8 + -9.8(1)
⇒ v = 0 m/s
The final velocity is hence 0 m/s.
Note:While solving questions of under gravity motions using equations of motion, remember the sign convection to avoid mistakes.You can consider positive above the ground and negative for towards it.A ball is thrown up into the air with the initial velocity of 18 m/s. A) How high does the ball go? B) Calculate the time needed for the ball to reach its max height.
Answer:
(a) h = 16.53 m (b) t = 1.83 s
Explanation:
Given that,
The initial velocity of a ball, u = 18 m/s
When it reaches to the maximum height, its final velocity v will be 0. Let it goes to a maximum height of h meters.
Finding t using first equation of motion as follows :
v = u +at
Here, a = -g and v = 0
[tex]t=\dfrac{u}{g}\\\\t=\dfrac{18}{9.8}\\\\t=1.83\ s[/tex]
The time needed for the ball to reach its max height is 1.83 s.
Let h is the maximum height. Using second equation of motion to find it :
[tex]h=ut-\dfrac{1}{2}gt^2\\\\h=18(1.83)-\dfrac{1}{2}\times 9.8\times (1.83)^2\\\\h=16.53\ m[/tex]
So, it will go to a maximum height of 16.53 m.
An aeroplane accelerates from rest at a rate
of 25m/s² for 3 s .calculate final velocity
Answer:
The final speed is 75 m/s
Explanation:
Constant Acceleration Motion
It's a type of motion in which the velocity of an object changes uniformly in time.
Being a the constant acceleration, vo the initial speed, vf the final speed, and t the time, the following relation applies:
[tex]v_f=v_o+at[/tex]
The airplane comes from rest (vo=0) accelerating at a=25 m/s^2 for t=3 s.
The final speed is:
[tex]v_f=0+25~m/s^2\cdot 3~s[/tex]
[tex]v_f=75~m/s[/tex]
The final speed is 75 m/s
Based on its location on the periodic table, which element could be used for
electrical wiring?
A. Argon (Ar)
B. Bromine (Br)
c. Aluminum (AI)
D. Phosphorus (P)
Choose the best description of the attraction between you and your classmate.
A. There is no attractive force
B. It was large enough to feel the attraction
C. extremely small (1.8 x 10-8 N)
D. There is not enough information to answer this question
Answer:
The correct option is;
D. There is not enough information to answer this question
Explanation:
The universal gravitational constant = 6.67408 × 10⁻¹¹ 3³/(kg·s²)
For an in between distance of 1 m and equal masses of 60 kg, we have;
[tex]F = G \times \dfrac{m_{1} \times m_{2}}{r^{2}} = 6.67408 \times 10^{-11} \times \dfrac{60 \times 60}{1^{2}} \approx 2.403 \times 10^{-7} N[/tex]
The gravitational attraction ≈ 2.403 × 10⁻⁷ N, which does not correspond with the answers, therefore, the best option is that there is not enough information to answer this question.
Two men are talking while standing next to each other in a parking lot at
the grocery store. One man is 125 kilograms while the other is 75
kilograms. Besides fluid friction, what type of friction do both men have in
common?
The car on a track begins at the 80-cm mark. The car moves in the negative direction at a speed of 5 cm/s. After three seconds, a. What distance has the car traveled? b. What is the displacement of the car? c. What is the car's new position on the track? Please hurry up
Answer:
a) The car travelled a distance of 15 centimeters.
b) The displacement of the car is -15 centimeters.
c) The new position of the car on the track is 65 centimeters.
Explanation:
a) From Mechanical Physics we know that the distance travelled is magnitude of the route covered by the vehicle. If this car travels in a straight line and at constant velocity, then we can calculate the distance traveled by the following expression:
[tex]\Delta s = v\cdot \Delta t[/tex] (Eq. 1)
Where:
[tex]v[/tex] - Speed of the car, measured in centimeters per second.
[tex]\Delta t[/tex] - Time, measured in seconds.
[tex]\Delta s[/tex] - Distance travelled by the car, measured in meters.
If we get that [tex]v = 5\,\frac{cm}{s}[/tex] and [tex]\Delta t = 3\,s[/tex], then the distance travelled by the car is:
[tex]\Delta s = \left(5\,\frac{cm}{s} \right)\cdot (3\,s)[/tex]
[tex]\Delta s = 15\,cm[/tex]
The car travelled a distance of 15 centimeters.
b) The displacement is the vectorial distance between final and initial position. Then, we find that initial and final positions of the car are, respectively:
Initial position:
[tex]s_{o} = 80\,cm[/tex]
Final position: ([tex]s_{o} = 80\,cm[/tex], [tex]\Delta s = 15\,cm[/tex])
[tex]s_{f} = s_{o} -\Delta s[/tex] (Eq. 1)
[tex]s_{f} = 80\,cm-15\,cm[/tex]
[tex]s_{f} = 65\,cm[/tex]
And the displacement of the car is: ([tex]s_{o} = 80\,cm[/tex], [tex]s_{f} = 65\,cm[/tex])
[tex]d = s_{f}-s_{o}[/tex] (Eq. 2)
[tex]d = 65\,cm-80\,cm[/tex]
[tex]d = -15\,cm[/tex]
The displacement of the car is -15 centimeters.
c) The position of the car is its location regarding a point of reference. From point b) we find that the new position of the car on the track is:
[tex]s_{f} = 65\,cm[/tex]
The new position of the car on the track is 65 centimeters.
why are people so rude/
Answer:
Some people have went through some things, but people will be people. I've heard people are born neutral, but are affected by the environment they live in.
Explanation:
HELP ASAP!!! PLEASE!!!
Which of the following is NOT a requirement of a good test?
A) Heritability
B) Validity
C) Standardization
D) Reliability
I could not find the answer online because it is saying an answer choice that is not there please help!!
A) Heritability is NOT a requirement of a good test. Option A is correct.
What is a requirement of a good test?Validity, Standardization, and Reliability are commonly considered requirements of a good test.
A) Heritability refers to the proportion of variability in a trait that can be explained by genetic factors. It is a statistical concept used in the field of genetics and is not a requirement for a good test.
B) Validity refers to the extent to which a test measures what it is intended to measure.
C) Standardization refers to the process of administering a test in a standardized manner to ensure that the results are comparable across different people or groups.
D) Reliability refers to the consistency of the results obtained from a test, i.e., the extent to which a test gives consistent results when repeated under the same conditions.
These three (B, C, and D) are commonly considered requirements of a good test.
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A 7.0 kg cannonball flying rightward at 12 hits a stationary rock. The cannonball keeps moving in the same
S
m
m
direction at 2.0 after the collision but sends the rock flying at 14 towards right
S
S
What is the mass of the rock?
Answer:
5.0 kg
Explanation:
use the equation; (m1v1i) + (m2v2i) = (m1v1f) + (m2v2f)
How can damage to living things occur from exposure to X-rays or gamma
rays?
A. The human body can overheat.
B. The human body can give off thermal energy,
C. Atoms and molecules in the body can be ionized.
D. Bad cases of sunburn can occur.
Answer:
C. Atoms and molecules in the body can be ionized.
Explanation:
The exposure to X-rays or gamma rays can ionized the atoms and molecules present in the living things like humans.
What is X-rays?X-rays are a type of radiation called electromagnetic waves. X-ray imaging creates pictures of the inside of your body.
What is gamma rays?A gamma ray, also known as gamma radiation, is a penetrating form of electromagnetic radiation arising from the radioactive decay of atomic nuclei.
Gamma rays can pass completely through the human body; as they pass through, they can cause ionizations that damage tissue and DNA.
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