Answer:
I say its true
Explanation:
A student bikes 5.00 km East to school in 30.0 min, realizes he forgot his calculator for physics, spends 30.0 min going back going home, and then races back to school in 27.0 minutes.
1.What is the students total distance traveled ?
2. Determine the students average speed ?
3. What is the students total displacement ?
4. Determine the students average velocity ?
Explanation:
Given data
distance = 5km
time taken to travel to school= 30 min
1. the total distance traveled is
from home to school+ school to home+ home back to school
5km+5km+5km= 15 km
2. Determine the students average speed
average speed is the total distance divided by the total time taken
= (5+5+5)/(30+30+27)
= 15/87 km/min
3 What is the student total displacement
the displacement tells how far a place is hence the displacement is 5km (i.e the school is 5km from his home)
4. Determine the students average velocity
a. speed home to school
v= 5/30= 0.166 km/min
b. school back home
v= 5/30= 0.166 km/min
c. speed home to school
v= 5/27= 0.185 km/min
Average velocity = (0.185 + 0.166 + 0.166)/3= 0.517/3= 0.17 km/min
A student puts a beaker of boiling water where it touches a block of ice.
Which two statements are true?
A. Thermal energy will move from the boiling water to the ice.
B. Thermal energy will move from the air to the ice.
O c. Thermal energy will move from the air to the boiling water.
D. Thermal energy will move from the ice to the air.
O
Answer:
Option (A).
Explanation:
When a hot and a cold objects come in thermal contact with each other,exchange of heat takes place between them until thermal equilibrium is reached.
In this process thermal energy flows from high temperature to low.
Therefore, when a beaker of boiling water comes in touch with a block of ice,
Thermal energy starts flowing from boiling water to block of ice until equilibrium is established.
Option (A) will be the answer.
A stone will sink because it is _____ than water
Answer:
Heavier
Explanation:
The stone is a heavy object, therefor, it'll sink fast
Because stone is much smaller than its gravity force
Match each physical property of matter to the appropriate definition
What are the properties and definitions?
Answer:
Theses are the answer
Explanation:
An airplane flies with an unknown velocity due east. The plane
is experiencing wind of 12 m/s due north which produces a
resultant velocity of 35.11 m/s northeast. Determine the
unknown velocity produced by the plane engines.
Answer:
32.99m/s
Explanation:
Using the formula for calculating the resultant velocity according to Pythagoras theorem
R² = 12²+x²
35.11² = 12²+x²
X² = 35.11²-12²
X² = 1232.7121-144
X² = 1088.8121
X = √1088.8121
X = 32.99m/s
Hence the unknown velocity produced by the plane engines is 32.99m/s
The unknown velocity produced by the plane engines will be "32.99 m/s".
Given:
Resultant velocity,
R = 35.11 m/sWind speed,
12 m/sBy using the Pythagoras theorem, we get
→ [tex]R^2= 12^2+x^2[/tex]
→ [tex]35.11^2=12^2+x^2[/tex]
→ [tex]1232.712=122+x^2[/tex]
→ [tex]x^2= 1099.8121[/tex]
→ [tex]x = \sqrt{1088.8121}[/tex]
→ [tex]= 32.00 \ m/s[/tex]
Thus the answer above is right.
Learn more:
https://brainly.com/question/17675290
the center of the sun is powered by which type of energy?
Answer: Its nuclear fusion
Explanation:
Answer:
Pretty sure it's Radiation.
Which has covalent bonds?
A.) glucose
B.) table salt
C.) steel alloy
D.) Iron oxide - rust
Answer:
A.) glucose
Explanation:
Answer:
A. glucose
Explanation:
pay attention to the lesson
This graph shows the displacements and times for the winner of a horse race. What was the average speed of the horse that won the race? 0.05 m/s 20 m/s 45 m/s 285 m/s Coordinate graph titled Displacement versus Time for the Winner of a Horse Race showing Time in seconds on horizontal axis ranging from zero to twenty five and Distance in meters on vertical axis ranging from zero to three hundred. The graph shows a line rising from zero to three hundred after fifteen seconds.
Answer:
The answer is 20m/s
Answer:
it 20m/s
Explanation:
i did the k 12 test
Which of the following are you not likely to see on a graph?
A. Dependent Variable
B.Independent variable
C. A Prediction
D. Units
Answer:
a
Explanation:
It is not possible for a graph to NOT change with the dependent variable never changing.
PLS AWNSER !
Space is essentially a vacuum where there is no matter whatsoever. Would you expect any type of wave (transverse, longitudinal, or surface) to travel through space? Why or why not?
Answer:
Surface.
Explanation:
Sorry, I had a lot of info on this, but "ContentBot" deleted my answer, so just trust me, okay?
What words can you spell out of the periodic table
The town hall building is situated close to Boojho’s house. There is a clock on the top of the town hall building which rings the bell every hour. Boojho has noticed that the sound of the clock appears to be much clearer at night. Explain.
Answer:
At night we experience quietness more. At this time, sounds of object will be heard more clearer
6.
_____is the rate at which an object
changes position
Answer:
Velocity is the rate at which an object changes position
6. An asteroid is traveling in a straight line at a constant speed of 327 m/s. How long will it take for a displacement of 732 km to occur?
A. 0.62 min.
B. 37.3 min.
C. 2.42 hrs.
D. 2.24 sec.
Answer:
the answer is b. 37.3 min..
explain the connection of heat to change in temperature AND states of matter
Answer:
When thermal energy is added to a substance, its temperature increases, which can change its state from solid to liquid (melting), liquid to gas (vaporization), or solid to gas (sublimation).
Explanation:
Which of the following is not a component of fitness? A. Cardiovascular fitness B. Muscular endurance C. Pulmonary endurance D. Body composition
Answer:
C. Pulmonary endurance
Explanation:
I'm pretty sure it's "C" because cardiovascular and pulmonary endurance are the same thing and usually you'd hear cardiovascular more than pulmonary.
Sorry if I'm wrong!
Answer:
c
Explanation:
i just took the test
A 70-kg boy is sitting 3 m from the ground in a tree. What is his gravitational potential energy
m x h x 9.8 m/s squared
70 kg x 3 m x 9.8 m/s squared= 2058 Joules
A wildbeest runs with an average speed of 4.0m/s for 15s . What was the distance travelled in meters
Answer:
60.0m im sorry if im wrong but this is what i got
Explanation:
Answer:
The Answer Is 60 m
Explanation:
Distance d = ?
Time t = 15 s
Average speed vavg = 4.0 m/s
You can rearrange the equation vavg = d/t to solve for distance travelled d.
vavg = d/t
d = vavgt
= (4.0 m/s) (15s)
= 60 m
Definition of displacement
Answer:
the moving of something from its place or position or the occupation by a submerged body or part of a body of a volume which would otherwise be occupied by a fluid
Explanation:
c:
a girl is 8 years older than her younger sister. The sum of their ages is 64 years, what is her age in years
Answer:
let the age of elder sister = x+8
then let the age of younger sister be x
sum of their ages = 64
according to the question,
x+8+x = 64
2x+8 = 64
2x = 64-8
2x = 56
x = 56/ 2
x = 28
so, the age of younger sister is 28 years
and the age of elder sister is x+8= 28+8= 36years
Question 4 (2 points)
(03.07)
Which of the following lines is parallel to x = 4? (2 points)
a.
3y=9
b.
y=4
c.
x=2
d.x = y
Answer:
x=2
Explanation:
.................
The brightest comet on record, the Great Comet of 1843, had a tail that trailed for 205,000,000 mi. Express this distance in scientific notation.
Answer:
2.05 x 108 mi
Hope this helps!
What are some examples of how we use science in or daily lives?
Answer: Science is involved in cooking, eating, breathing, driving, playing, etc. The fabric we wear, the brush and paste we use, the shampoo, the talcum powder, the oil we apply, everything is the consequence of advancement of science. Life is unimaginable without all this, as it has become a necessity.
Explanation:
Answer:
Science is at work in almost every part of our lives from the computer we use to the foods that we consume. For example take the yellow corn that we are use to eating it is actually a result of bio-agriculture.
Explanation:
The Internet Engineering Task Force (IETF) sets standards for webpage design.
a) true
b) false
Which statement describes a histogram?
A. It shows a frequency distribution.
B. It shows how an independent variable affects a dependent
variable.
C. It shows data as proportions of a whole.
D. It shows a line of best fit.
Answer:
A
Explanation
dont ask me
Which of the following are not examples of circular motion?
Check all that apply.
A. race car going around a turn in the road
B. basketball falling toward the hoop after being thrown
C. roller skating down a hill
D. earth going around the sun
E. the path of a soccer ball rolling on the ground
4.0 kg objects mive a distance of 7.8 m under the action of a cinstant gorce of 5.6 N. how much work is dine on object?
Answer:
43.68 J
Explanation:
Distance moved= 7.8 m
Force = 5.6 N
Work Done= Distance moved * Force
= 7.8 *5.6
=43.68 Joules
is the amount of . space that matter in an object occupies. is anything that has.
0.042 kg … ________________grams
Answer:
42 grams
Explanation:
you multiply the value by 1000 to get your answer
What are some symptoms of depression?name three
Answer:
out bursts of anger
irritable
negative outlook on everything
"what's the point" or " it's all my fault" statements
loss of interest in things they enjoy(sex,eating,working,friends,shows,games etc.)
tired easily/ insomnia
uncontrollable emotions
thinking causing physical pain
Explanation:
I.....
Answer:
Trouble concentrating, remembering details, and making decisions
Fatigue
Feelings of guilt, worthlessness, and helplessness
Pessimism and hopelessness
Explanation:
