Answer:
false
A hypothesis states a presumed relationship between two variables in a way that can be tested with empirical data. ... The cause is called the independent variable; and the effect is called the dependent variable.
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 sports car accelerates at 2.80 m/s2 along a straight road. At t1 = 5.00s and t2 = 5.50 s it passes two marks that are 35.0 m apart. What is the car's velocity at t0 = 0 s?
Explanation:
Using kinematics,
s = ut + 0.5at².
We have s = 35.0m, t = 0.50s, a = 2.80m/s².
Substitute in the variables, we have u = 69.3m/s.
This u is only the initial velocity at t1. To find the velocity at t0, we apply a different kinematics equation with different values:
We have t = 5.00s, a = 2.80m/s², v = 69.3m/s.
Using kinematics,
v = u + at.
Substitute in the variables, we have u = 55.3m/s.
Hence the car's initial velocity is 55.3m/s.
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
Match each physical property of matter to the appropriate definition
What are the properties and definitions?
Answer:
Theses are the answer
Explanation:
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
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!
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
the center of the sun is powered by which type of energy?
Answer: Its nuclear fusion
Explanation:
Answer:
Pretty sure it's Radiation.
2. A child observes a caterpillar walking on a window sill. The caterpillar walks 18 cm to the left, then 6 cm to
the right, then 10 cm to the left.
b. What is the displacement of the caterpillar?
Answer:
D = 8 cm
Explanation:
It is given that, the caterpillar walks 18 cm to the left, then 6 cm to the right, then 10 cm to the left.
We need to find the displacement of the caterpillar. The attached figure shows the path traveled by the caterpillar. A is the initial position, then it reaches B and finally it reaches C.
Let right side is positive and left is negative. We know that,
Displacement = final position - initial position
= C - A
= -10-(-18)
= 8 cm
Hence, the displacement of the caterpillar is 8 cm.
What do elements in the same group have?
similar properties
the same atomic mass
the same number of electron shells
similar atomic numbers
Answer:
the same number of electron shells
Explanation:
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
0.042 kg … ________________grams
Answer:
42 grams
Explanation:
you multiply the value by 1000 to get your answer
Malia has developed Type II Diabetes. When she eats, her body
does not release the proper amount of insulin needed to balance
her blood sugar (glucose) levels. Which life function is most
threatened by Malia's disease?
Select one:
a. Growth
b. Movement
c. Metabolism
d. Excretion
Answer:
The correct option is c.
Explanation:
Metabolism is a sum of anabolic and catabolic reactions. The body's inability to produce/synthesize enough insulin is the cause of type II diabetes. Generally, metabolism is the process in which most compounds (proteins, carbohydrates and lipids) are produced (anabolism) or broken down (catabolism) in the body. Insulin is a protein that can be produced in less amount due to metabolic disorder in the body.
Maria's disease means she already has an exponentially high amount of blood sugar against the required insulin to balance it out, hence the disease already slowed down her rate of metabolism (catabolism) of blood sugar EXCEPT she decides to increase of metabolism by medication and exercise.
What words can you spell out of the periodic table
Electrons are important to electric current because they are able to (2 points)
O a carry a positive charge with them as they are transferred from one atoſ to the next creating electric current
Oь
change from a positive charge to a negative charge when transferred from the one atom to the next as the atom becomes an ion
Oc move from one atom to another; the atom that loses an electron becomes positively charged and the atom that gains an electron
becomes negatively charged
Od
shift from one atom to another creating a change in the charge of the atom from a negative to a positive
answer: C
Explanation:
move from one atom to another, the atom that loses an electron becomes positively charged and an atom that gains electrons becomes negatively charged
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:
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:
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:
.................
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
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:
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:
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?
The Internet Engineering Task Force (IETF) sets standards for webpage design.
a) true
b) false
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
What area of earth contains semi-solid rock and lava?
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 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
6.
_____is the rate at which an object
changes position
Answer:
Velocity is the rate at which an object changes position
3. What distance will a car, traveling 65 km/hr, cover in 3.0 hrs? (195 km)
Answer:
[tex] \boxed{\sf Distance \ travelled \ by \ car = 195 \ km} [/tex]
Given:
Speed = 65 km/hr
Time = 3.0 hrs
To Find:
Distance
Explanation:
Distance = Speed × Time
= 65 × 3
= 195 km
GiveN:
Speed of the car = 65 km/hrTime taken = 3 hourTo FinD:
We have to find the distance travelled by the body?We know that, Distance is the product of speed of the body and the time taken in the same system of units. Then,
⇛ Distance = Speed × Time
⇛ Distance = 65 km/hr × 3 hrs
⇛ Distance = 195 km
And this is your required answer..[tex].[/tex]
is the amount of . space that matter in an object occupies. is anything that has.
