Answer:
Density = Mass/volume. D= 60/30.Divide it and you'll get ur answer as 2
A glass of water with a mass of 0.35 kg rests on the edge of a desk 0.85 m
above the floor. Given that the acceleration due to gravity is 9.8 m/s2, what is
the glass's potential energy?
A. 4.04 J
B. 1.24 J
C. 2.92 J
D. 0.03 J
Answer: c
Explanation:
A glass of water with a mass of 0.35 kg rests on the edge of a desk 0.85 m above the floor. Given that the acceleration due to gravity is 9.8 m/s2. so, the glass's potential energy is 2.92 Joule.
To find the potential energy,
The given values are,
Mass m = 0.35 Kg
Height h = 0.85 m
g = 9.8 m/s²
What is Gravitational Potential Energy?Gravitational potential energy is the energy stored in an object because of its vertical position or height in a gravitational field.
It can be calculated with the equation:
U = mgh Joules.
Where m is the mass of the object,
h is the height with respect to a fixed reference, and
g is the acceleration of gravity, or 9.8 m/s^2.
The glass of water has a mass of m=0.35 kg and it's located at a height of h=0.85 m. Calculating the potential energy:
U = 0.35× 9.8×0.85
U = 2.9155 Joules.
The glass's potential energy is 2.92 Joule.
Hence, Option C is the correct answer.
Learn more about Potential energy,
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anis walks 1 km north and then turns west and walks 2 km. That is the distance
and displacement in km? In m?
Answer:
d = 3 Km =3,000 m
x=2.236 Km = 2,236 m
Explanation:
Distance and Displacement
When an object moves, it describes a certain path from the staring to the ending point. The sum of all the individual path lengths is called distance.
The length of the path measured from the start to the endpoint regardless of the individual paths taken is called displacement.
Anis walked 1 Km north and then 2 Km west. The total distance traveled is:
d=1 Km + 2 Km = 3 Km
d = 3 Km
We can express it in meters, recalling 1 Km = 1,000 m:
d = 3,000 m
The displacement is computed as the length of the segment from the origin to the point located at 1 Km north, 2 Km west. These movements describe a right triangle whose legs are 1 Km and 2 Km. The required displacement is the hypotenuse of the triangle:
[tex]x=\sqrt{1^2+2^2}=\sqrt{5}\approx 2.236\ Km[/tex]
x=2.236 Km
Converting to meters:
x=2,236 m
some people will realize that they are dreaming while the dream is happening. this is called
A. REM
B. semantic dreaming
C. lucid dreaming
D. sleep talking
Answer:
the answer is lucid dreamers ..hope it helped you dear
5750 milliliters converted to Liters
Answer:
5.75 liters
Explanation:
5750 milliliters converted to liters is 5.75
Answer:
5.75 L
Explanation:
Step 1: Find conversion
1000 mL = 1 L
Step 2: Use Dimensional Analysis
[tex]5750 \hspace{3} mL(\frac{1 \hspace{3} L}{1000 \hspace{3} mL} )[/tex] = 5.75 L
Without friction, what happens? Check ALL
that apply.
A. a car would slide off the road when going arounda curve
B. a car would float above the road
C. a car would not be able to brake and stop
name the instrument used to control current in an electric circuit.
Guys please help me
The instrument which is used to control current in an electric circuit is rheostat.
Hope this helps :)
Answer:
or bhai kya haal h
hum bhi india se hi h
a brick of mass of 1 kg and density 2.5gm/cm³ is immersed in water how much mass of water is displace by it.
Answer:
1 kg
Explanation:
.suebebdindnwb....
17
what is
meant by the statement'
Pressure of gas is 13.6cm of Hg'?
Answer:
It ,means, the mercury rises to 13.6 cm in the barometer.
Explanation:
Given that,
The statement' Pressure of gas is 13.6cm of Hg'.
We know that,
(I). The pressure is equal to the force upon area.
(II). The gas pressure is the real force which is applied on the walls of container by the gas.
(III). The gas pressure is measured by barometer.
(IV). The standard atmospheric pressure is 760 mm of Hg and the density of Hg is 13.6 cm.
It means, when the pressure exerted on the wall then the mercury rises to 13.6 cm in the barometer
Hence, It ,means, the mercury rises to 13.6 cm in the barometer.
Question 10 (1 point)
Through which of the following can mechanical waves be transferred the fastest?
Answer:
Helium gas
Explanation:
~ Mechanical waves move more quickly through solids than through gases because mechanical waves propagate with the vibrations of the particles they move through. ... The particles in gases are more spread out than the particles in solids or in liquids, so electromagnetic waves move quickly through gases.
Select the correct answer.
If the amplitude of a sound increases, which statement is true?
O A. The sound energy decreases.
OB.
The wavelength of the sound increases.
O C. The loudness of the sound increases.
OD. The pitch of the sound increases.
Answer:
B is the best answer for the question
Answer:
C
Explanation:
If a ball is thrown horizontally, and the initial horizontal velocity is 5 m/s, what will be the final horizontal velocity? *
Answer:
5 m/s
Explanation:
Assuming no air resistance, the horizontal acceleration is 0 m/s². So the final velocity is the same as the initial velocity.
is the length of the route between two
points.
a
Displacement
b
Position
С
Velocity
d
Distance
Answer:
D. Distance
Explanation:
..........................
Question 4 11 poing, The total distance traveled by an object divided by the total time it takes to travel that distance is called
Answer:
speed
Explanation: because formula for speed is distance over time
An apple has 6 J of energy. The apple sits on a counter 3 m high. What is the mass of the apple?
Explanation:
PE= mgh
6 J= (3m) (9.81 m/s2) (mass)
mass=( 6)/(3×9.81)
mass= 0.20 Kg
The mass of the apple is 0.2 kg
From the question,
We are to determine the mass of an apple that sits on a counter 3m high.
From the given information,
The apple has an energy of 6 J. This energy is the apple's potential energy.
From the formula for potential energy, P.E, we have that
P.E = mgh
Where m is the mass
g is the acceleration due to gravity (Take g = 9.8 m/s²)
h is height
From the question
P.E = 6J
h = 3 m
Putting the parameters into the formula, we get
6 = m × 9.8 × 3
6 = m × 29.4
∴ m = 6 ÷ 29.4
m = 0.20408 kg
m ≅ 0.2 kg
Hence, the mass of the apple is 0.2 kg
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A 3-column table with 4 rows. The first column titled substances has entries aluminum, zinc, chromium, nickel. The second column titled density has entries 2.70 grams per centimeter cubed, 7.13 grams per centimeter cubed, 7.18 grams per centimeter cubed, 8.90 grams per centimeter cubed. The third column titled mass has entries 4.60 grams, 9.81 grams, 6.24 grams, 3.17 grams. Use the information in the table to identify the metal with a volume of 1.38 cm3. aluminum zinc chromium nickel
Answer: The metal with a volume is zinc.
Explanation: Got it right on Edge2020
Answer:
A 2-column table with 4 rows. The first column has entries glass, baby oil, maple syrup, wax. The second column has entries 2.40 grams per centimeter cubed, 0.83 grams per centimeter cubed, 1.37 grams per centimeter cubed, 0.93 grams per centimeter cubed.
Use the information in the table to predict whether each substance will sink or float in water. Note that the density of water is 1.0 g/cm3.
Glass:
✔ sinks
Baby oil:
✔ floats
Maple syrup:
✔ sinks
Wax:
✔ floats
Below is a nuclear equation. What number should go in the place marked (i)?
The nuclear reaction becomes:
U₉₂²³⁸ → Th₉₀²³⁴+ α⁴₂
Thus, here (i) 234 and (ii) 90
What is alpha-decay?Uranium-238 decays to thorium-234 via alpha decay. (The numbers after the chemical names indicate the number of protons and neutrons.) Uranium-238 loses two protons and two neutrons in this process, forming the isotope thorium-234.
Reactors based on thorium are safer since the reaction is simple to stop and does not need to be carried out under intense pressure. When compared to uranium reactors, thorium reactors produce significantly less waste, and the waste produced is far less radioactive and far shorter in duration.
Now, here (i) 234 and (ii) 90
To know more about nuclear reaction refer to
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Answer:
(i) 234 and (ii) 90
A _________ is a graphical representation of association between variables.
A.
scatterplot
B.
regression plot
C.
graphical plot
D.
variable plot
Please select the best answer from the choices provided
A
B
C
D
A solute will dissolve more quickly if the solvent particles are moving faster and therefore collide with the surface of the solid solute pieces more often.
Which condition will cause this to occur?
Answer
Higher Temperatures
The highest point on a wave is:
the crest
the top
the coast
the trough
The highest point on a wave is the crest
is the change in position of an object
Answer:
Explanation:
In my opinion motion is the correct answer
a drag racer starts from the rest and accelerates at 7.4m/s^2.how far will he travel in 2.0 seconds?
Answer:
14.8 m
Explanation:
S= ut + [tex]\frac{1}{2}[/tex]a[tex]t^{2}[/tex]
where u = initial velocity
S= (0 [tex]\frac{m}{s}[/tex])(2[tex]s[/tex]) + [tex]\frac{1}{2}[/tex](7.4[tex]\frac{m}{s^{2} }[/tex])(2[tex]s^{2}[/tex])
S= [tex]\frac{1}{2}[/tex](7.4[tex]\frac{m}{s^{2} }[/tex])(2[tex]s^{2}[/tex])
S=14.8 m
When a person who is meditating tries to focus on a single image, they are practicing which type of meditation?
A.
breathing
B.
mindful
C.
concentrative
D.
transcendental
Answer :-
Concentrative meditation
Answer:
C. is correct on edge2020
Explanation:
hope this helps please mark me the brainliest! peace and love
Brad loves his new motorcycle. He takes it for a spin and travels 70 km in 1.2 h. He then stops to let
everyone admire it for 0.30 h. Finally he zooms off down the highway and travels 100 km. in next 1.0 h.
Calculate motorcycle’s average speed.
Answer:
113.33333333 km/hr
Explanation:
The formula for Average Speed = Distance (Kilometers)/Time(hours)
Total Distance travelled = 70km +100km
= 170km
The Total time is takes to travel that distance = 1.2h + 0.30h + 1h
= 1.50hr
Average speed of the Motorcycle = 170km/1.5hr
= 113.33333333 km/hr
In a skateboard race, the winner covered 26 meters in 3.88 seconds . What was his speed?
Two ants at a picnic find a small piece of cake. Each picks up the cake and tries to carry it
home. The first ant's home is due west and he pulls with a force of 10 N. The second ant's
home is due south and he pulls with a force of 10 N. In what direction is the cake heading?
If the cake can withstand a force of 13.5 N, what do you predict will happen?
Answer:
The ants would just carry it and fight for the way home, so if the other ant loses the cake would just be on that same spot till the ants get more ants from their home.
Please help me with this problem for physics !
Answer:
2 m/s²
Explanation:
velocity =
[tex] \frac{20 - 0}{10} [/tex]
20/10 = 2
Explain how earths lithosphere and asthenosphere work together
Answer:
The lithosphere can affect the atmosphere when tectonic plates move and cause an eruption, where magma below spews up as lava above.
Explanation:
The lithosphere is broken into giant plates that fit around the globe like puzzle pieces. These puzzle pieces move a little bit each year as they slide on top of a somewhat fluid part of the mantle called the asthenosphere.
Erica throws a tennis ball against a wall, and it bounces back. Which force is responsible for sending the ball back to Erica?
OA. the force that the ball exerts on the wall
OB. the frictional for between the wall and the ball
OC, the acceleration of the ball as it approaches the wall
OD. the normal force that the wall exerts on the ball
A roller coaster starts down hill at 15.3 m/s. Five and half seconds later, its speed is 42 m/s. Find the acceleration of the roller coaster.?
Answer:
This is just simple math. Your answer would be 26.7 m/s
Explanation:
The first Tacoma Narrows Bridge in Washington crossed over a strait in Puget Sound. At the time the suspension bridge was built, construction workers noticed that it moved up and down in the wind. Measures to stop the bridge's movement were ineffective, but the bridge was opened to the public on July 1, 1940. The bridge collapsed on November 7, 1940. Luckily, no people were seriously injured. Determine which technological design criteria the Tacoma Narrows Bridge did and did not meet. Explain your answer.
Answer:
Follows are the solution to this question:
Explanation:
When the Tacoma Narrows Bridge was built, it may not have met the technical design requirements and when it didn't solve the problem for long so, the bridge will be unsustainable and fell. or we can say that Due to an aeroelastic flutter caused by high winds, the bridge collapsed. The bridge oscillated rapidly and ultimately dropped. Its collapse of the bridge has lasting impacts on science and technology.
Answer:
When the Tacoma Narrows Bridge was built, it may not have met the technical design requirements and when it didn't solve the problem for long so, the bridge will be unsustainable and fell. or we can say that Due to an aeroelastic flutter caused by high winds, the bridge collapsed. The bridge oscillated rapidly and ultimately dropped. Its collapse of the bridge has lasting impacts on science and technology.
