Answers
Answer: Brick
Explanation: Because bricks are made of concrete and concrete is a dense building material.
Related Questions
whats another way to say mass is the amount of matter
Answers
Answer:
Mass is an substance which occupies space
Explanation:
Answer: a coherent, typically large body of matter with no definite shape.
Explanation:
The Fitness Gram push-up test is a measure of
A).muscular definition
B).muscular strength
C).muscular endurance
D).flexibility
Answers
Answer:
The answer is B.
Explanation:
I meant B. not C so sorry
Answer:
the push up test assesses C.) muscular endurance
Explanation:
9.) The fastest land animal, the cheetah, can accelerate from 0 m/s to 33 m/s in 3 seconds. What is the cheetah's acceleration?
Answers
Answer:
11 m/s
Explanation:
What happens to the light rays when they hit the specimen?
a) They are focused into a small area towards the objective lens.
b) They are absorbed by the stage.
c) They are reflected, refracted, or absorbed by the specimen.
d) They are diverted to the ocular lens.
Answers
Answer:
C
Explanation:
Ray of light when hits any specimen or object. The light is partially reflected, partially reflected and partially absorbed. It is never completed reflected, refracted or absorbed. Hence, the correct answer would be c.
state Pascal's principle of transmission of pressure
Answers
Answer:
Pascal's law (also Pascal's principle or the principle of transmission of fluid-pressure) is a principle in fluid mechanics given by Blaise Pascal that states that a pressure change at any point in a confined incompressible fluid is transmitted throughout the fluid such that the same change occurs everywhere.
Explanation:
Pascal's law says that pressure applied to an enclosed fluid will be transmitted without a change in magnitude to every point of the fluid and to the walls of the container. The pressure at any point in the fluid is equal in all directions.
David is mowing his lawn. He has been riding on the mower at 50m/hr for 2.5 hours? What is the distance of the area David has mowed
Answers
Answer:
125 metres
Explanation:
Distance = speed × time
Here , speed = 50m/hr
time = 2.5 hr
So,
Distance = 50 × 2.5
=125 m
Answer:
the distance of the area David has mowed = 125 m
Explanation:
given:
He has been riding on the mower at 50m/hr for 2.5 hours?
find:
What is the distance of the area David has mowed
formula = .distance = velocity x time
where velocity = 50 m/hr.
time = 2.5 hours
plugin values into the formula:
distance = 50 m/hr x 2.5 hr.
distance = 125 m
therefore,
the distance of the area David has mowed = 125 m
Two movers use a ramp to load a piano into a truck
• Describe how the potential energy and kinetic energy of the piano change as it sits on the ground, as it is moved into the truck, and as it sits in the truck
Enter your answer in the space provided
Answers
The potential energy increases as the piano change its position as it sits on the ground, as it is moved into the truck, and as it sits in the truck.
What is mechanical energy?The sum of all the energy in motion (total kinetic energy) and all the energy that is stored in the system (total potential energy) is known as mechanical energy.
As given in the problem, two movers use a ramp to load a piano into a truck, we have to describe how the potential energy and kinetic energy of the piano change as it sits on the ground, as it is moved into the truck, and as it sits in the truck.
The potential energy increases as the piano change its position as it sits on the ground, as it is moved into the truck, and as it sits in the truck.
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A firework is fired from the ground straight up on a planet with an acceleration due to gravity of 10.56 m/s/s. The firework will not explode until the moment where it would have started to move back down again. The initial speed of the firework is 90.1 m/s. Use this information to find the height at which the firework explodes and the time it will be traveling upward.
Answers
Answer:
384 m
8.53 m/s
Explanation:
Given:
v₀ = 90.1 m/s
v = 0 m/s
a = -10.56 m/s²
Find: Δy and t
v² = v₀² + 2aΔy
(0 m/s)² = (90.1 m/s)² + 2 (-10.56 m/s²) Δy
Δy = 384 m
v = at + v₀
0 m/s = (-10.56 m/s²) t + 90.1 m/s
t = 8.53 s
In addition to 1 m = 39.37 in, the following exact conversion equivalents are
given: 1 mile = 5280 ft, 1 ft = 12 in, 1 hr = 60 min, and 1 min = 60 s. If a
particle has a velocity of 8.4 miles per hour, its velocity, in m/s, is closest to
Answers
Answer:
3.76 m/s.
Explanation:
Velocity in mile per hour (mph) = 8.4 miles per hour
Velocity in metre per second (m/s) =?
Next, we shall convert 8.4 mph to ft/h. This can be obtained as follow :
1 mph = 5280 ft/h
Therefore,
8.4 mph = 8.4 mph / 1 mph × 5280 ft/h
8.4 mph = 44352 ft/h
Next, we shall convert 44352 ft/h to in/h. This is illustrated below:
1 ft/h = 12 in/h
Therefore,
44352 ft/h = 44352 ft/h / 1 ft/h × 12 in/h
44352 ft/h = 532224 in/h
Next, we shall convert 532224 in/h to m/h. This can be obtained as follow:
39.37 in/h = 1 m/h
Therefore,
532224 in/h = 532224 in/h / 39.37 in/h × 1 m/h
532224 in/h = 13518.51664 m/h
Next, we shall convert 13518.51664 m/h to m/min. This is illustrated below:
1 m/h = 1/60 m/min
Therefore,
13518.51664 m/h = 13518.51664 m/h / 1 m/h × 1/60 m/min
13518.51664 m/h = 225.30861 m/min
Finally, we shall convert 225.30861 m/min to m/s. This is illustrated below:
1 m/min = 1/60 m/s
Therefore,
225.30861 m/min = 225.30861 m/min / 1 m/min × 1/60 m/s
225.30861 m/min = 3.76 m/s
Therefore,
8.4 miles per hour is equivalent to 3.76 m/s.
Unit conversion does not change the real value. The velocity of the particle, when converted to meters per sec, is 3.756.
What is Units conversion?Unit conversion is a way of converting some common units into another without changing their real value. for, example, 1 centimeter is equal to 10 mm, though the real measurement is still the same the units and numerical values have been changed.
In order to convert the unit of velocity, we will first convert miles to meters and then, hours to seconds.
As it is given to us,
1 mile = 5280 ft
1 ft = 12 inches
1 m = 39.37 in
Now, since 1 m = 39.37 inches, therefore
[tex]1\rm\ in =\dfrac{1}{39.37}\ m[/tex]
Converting a mile to meter,
[tex]1\rm\ miles = 5280\ ft \times 12\ inches\times \dfrac{1}{39.38} m\\\\1\ miles = 1609.652\ m[/tex]
Converting hours to seconds
[tex]1\rm\ hour = 60\ minutes \times 60\ seconds\\\\1\ hour = 3600\ seconds[/tex]
Now, converting the velocity we will get,
[tex]1 \rm\ \dfrac{miles}{hour} = \dfrac{1609.652}{3600}\ \dfrac{m}{s}\\\\1 \rm\ \dfrac{miles}{hour} =0.447\ \dfrac{m}{s}[/tex]
Now, as given to us the velocity of a particle is 8.4 miles\hour, therefore,
[tex]8.4 \rm\ \dfrac{miles}{hour} =8.4 \times 0.447\ \dfrac{m}{s}\\\\8.4 \rm\ \dfrac{miles}{hour} =3.756\ \dfrac{m}{s}\\\\[/tex]
Hence, the velocity of the particle when converted to meters per sec is 3.756.
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Which describes an object in projectile motion?
Gravity acts to push the object sideways.
The object moves in a straight path.
The forward velocity of the object is 0 m/s.
The object's inertia carries it forward.
Answers
Answer:
D: The object's inertia carries it forward.
Explanation:
Answer:
The answer is d
Explanation:
Scientists might model volcanic eruptions using a computer model. What is
the biggest benefit of this model?
Answers
Scientific model of volcanic eruptions using computer programming is very helpful to identify their origin and consequences. The biggest benefit of these model is to identify the physical behaviors of magma .
What are scientific models ?Scientific model are used to visualize the complex theories and concepts. There are both theoretical models and visual models. Nowadays complex problems and processes are easily solving using well designed computer programmes and simulations.
By creating a sophisticated computer model based on the most recent physical understanding of magma behavior, its most likely path of least resistance, and statistical information obtained from prior volcanic eruptions, scientists was able to address these issues.
They were able to predict the site of historical events that were not used to fine-tune the model by using historical data collected from Campi Flegrei, a caldera close to Naples, Italy etc.
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Answer:
Using a model is less hazardous than being up close to a real Volcano
Explanation:
a chemical reaction a temperature change may occur because of the breaking or formation of chemical bonds that release excess energy. Since there is a change in temperature why wouldn't this reaction be considered a physical change instead of a chemical change ?
Answers
Answer:
Explanation:
in some reactions we see this as a change in the temperature. ... The study of energy changes (particularly heat) in chemical reactions is known as ... When a chemical reaction occurs, bonds in the reactants break, while new bonds form in the product. ... Physical changes can also be classified as exothermic or endothermic.
How much ground do you travel if you travel for 161.65 seconds at a speed of 58.01
Answers
Explanation:
Hey there!
Given,
Speed (s)= 58.01m /s
Time (t) = 161.65s
Now, Using distance formula.
[tex]d = s \times t[/tex]
Put all values.
[tex]d = 58.01 \times 161.65[/tex]
Multiply them.
[tex]d = 9377.3166m[/tex]
Therefore the distance is 9377.31m.
Hope it helps..
How does wind and water circulate the globe?
Answers
Answer:
The winds pull surface water with them, creating currents.
During a launch, a space shuttle increases its speed starting from 6 seconds to
17 seconds. The space shuttle's speed increased from 25 m/s to 63 m/s. What
was the average acceleration of the shuttle?
Answers
Explanation:
Average acceleration is the change in velocity over change in time.
a = Δv / Δt
a = (63 m/s − 25 m/s) / (17 s − 6 s)
a ≈ 3.45 m/s²
If a distance-time graph contains the point (4, 15), what does that tell you about the runner?
Answers
Explanation:
It is given that there is distance time graph. The slope of any distance time graph will give the speed or velocity of the object.
In the context, it is seen that there is a point in the distance - time graph. And the values of the point in the graph is (4,15).
Now here, the distance is plotted in the ordinate or the vertical y-axis while time is plotted in the abscissa or the horizontal x-axis.
Thus the point (4,15) tells us that the object has traveled 15 units in time equal to 4 seconds.
a driver brings a car to a full stop in 2.0s its acceleration is -11m/s. how far did the car travel while braking
Answers
Answer:
22
Explanation:
how long will it take a running horse to travel 260 m and attain a speed at 12 m/s from rest?
Answers
Answer:
Explanation:
s=vt
t=s/v
s=260 m
v=vf-vi=12-0=12 m/s
therefore
t=260/12=21.67 sec
There is also one question describe the difference between velocity and a acceleration
Answers
Answer: The difference between velocity and acceleration is that velocity is the current speed while acceleration is the increase in speed.
Explanation: Hope this helps.
If velocity is positive, which would most likely yield a negative acceleration?
1. A final velocity that is faster than the initial velocity.
2. A time that is less than half hour.
3. An initial velocity that is faster than a final velocity.
4. A tune that is greater than half hour.
Please help there’s only 52 minutes left...
Answers
Answer:
An initial velocity that is faster than a final velocity.
Explanation:
The most likely yield of a negative acceleration given that velocity is positive is : ( 3 ) An initial velocity that is faster than a final velocity
What is Negative acceleration ?A negative acceleration is rate of change of velocity in the negative direction ( i.e decrease in velocity with time ). A negative acceleration is also known as dacceleration. To achieve a negative acceleration the final velocity has to be less than the initial velocity.
Hence we can conclude that The most likely yield of a negative acceleration given that velocity is positive is : ( 3 ) An initial velocity that is faster than a final velocity.
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Your favorite taco stand is 800 m away, and closes in 15 minutes. How fast do you have to run to make it on
time?
Answers
You must run at least 53.3333333 meters a minute.
So, 800/15=53.33. You have to run at 53.33meters per minute to make it on time
6. Interpret the following graphs and answer the questions below. a Which sounds have a higher frequency than A? b. Which sounds have a lower frequency than A? c. Which sounds all have the same pitch? d. Which sounds are louder than A? e. Which sound has a higher pitch than A, but is at the same volume? f. How would sound D sound compared to A?
Answers
Answer:
a) Frequency is inversely proportional to the wavelength, then the graphs with smaller wavelengths than A have larger frequency than A.
The correct options are: B and C.
b) The opposite as above, in this case the correct options are: D and E.
c) The ones with the same wavelength will have the same pitch:
A and F seems to have the same wavelength.
B and C also seems to have the same wavelength.
d) The vertical height of the peaks are related to the louder sounds, then the sounds louder than A are: B and F.
e) The one that has a higher pitch (or smaller wavelength) and the same amplitude than A is C.
(you need to measure the height of the peaks in both graphs, and see that are equal).
f) D has a larger wavelength than A, so it would sound "lower", and both waves have the same amplitude, so the loudness will be the same.
What is electrical conductors and insulators?
Answers
Answer:
In a conductor, electric current can flow freely, in an insulator it cannot. "Conductor" implies that the outer electrons of the atoms are loosely bound and free to move through the material. ... Most atoms hold on to their electrons tightly and are insulators.
Explanation:
because it is
is anyone good at physics who can help me??
A dog trots from -11 m to 4 m in 14 s . whats is its velocity ?
Answers
Answer:
1.07 m/s
Explanation:
This is a simple speed distance time question.
first, we need to determine the distance between -11 and 4.
(think of a number line).
We add 4 to 11 using absolute value (i.e taking away negatives), and we get 15 m, our distance. We are attempting to find speed, and we have our time.
Speed is distance/time.
Now we have our equation, we plug in our variables.
speed (aka velocity)= 15/14.
speed= 1.07142857143
If we round to 2 place values, our speed is 1.07 m/s.
The velocity of the dog's trots is 1.07 m/s after using the speed-distance-time relationship.
What is the distance?Distance is a numerical representation of the distance between two items or locations. Distance refers to a physical length or an approximation based on other physics or common usage considerations.
It is given that:
A dog trots from -11 m to 4 m in 14 s.
As we know, the speed-distance-time relationship:
Speed = distance/time
The distance = 4 - (-11)
The distance = 4 + 11
The distance = 15 m
Time = 14 seconds
Speed = 15/14
The velocity of the dog's trots is:
Speed = 1.07 m/second or 1.07 m/s
Thus, the velocity of the dog's trots is 1.07 m/s after using the speed-distance-time relationship if the dog trots from -11 m to 4 m in 14 s.
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Differentiate between static friction and sliding friction.
Answers
Answer:
Static friction prevents the motion of an object while sliding friction is a type of frictional motion between two surfaces in contact.
Explanation:
Which of the following is NOT an early sign of heat illness?
Dizziness
Headache
Flushed face
Excessive sweating
Struggling to perform
Answers
Struggling to perform is not an early sign of heat illnesses.
There are times when the body system will be unable to dissipate heat effectively. When this happens, heat illness bounds to occur.
Also, heat illnesses tend to occur when the balance of salt and water in the body becomes unbalanced, the temperature rises unexpectedly or the sweet couldn't keep an individual cool.
Some of the early signs includes Headache, dizziness, Muscle cramps, weak pulse among other related symptoms.
Based on the above explanation, we can see that struggling to perform is not an early sign of heat illnesses.
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Please help me answer this question !
2. Which ocean/sea formed from the rifting of North and South American away from Europe and Africa?
A. Red Sea
B. Pacific Ocean
C. Black Sea
D. Indian Ocean
E.Mediterranean Sea
F. Atlantic Ocean
Byu
Answers
Answer:
probably F. Atlantic Ocean
Explanation:
hope it helps.
The speed and direction of a moving object referred to as which of the following
A. Distance
B.speed
C.velocity
D.time
Answers
Answer:
velocity.
Explanation:
velocity includes both speed and direction of the motion!
difference between simple and complex machine
Answers
Simple Machine: Any of various devices that function in a manner basic to any machine, such as a lever, pulley, wedge, screw, or inclined plane. Complex Machine: A device consisting of two or more simple machines working together.
Can science be certain about evidence collected even no one has ever seen an event? Explain.
Answers
Answer:
Heyo!
Explanation:
Science, they would claim, can describe elements of the natural world but not explain them. For many scientists, this is a distinction without a difference. The Nobel Prize-winning physicist Steven Weinberg, an eloquent advocate for science's place in the realm of ideas, takes this distinction at face value - in order to demonstrate that science does indeed explain something.
Hope This Helped
