Answer:
I need to see the answer choices firsts silly
Explanation:
I need to see the answer choice firsts in order to answer because it can be many different answers
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
w
5
4. If it takes 105 calories to warm 100 g of aluminum from 20° C to 25° C, what is the
Specific heat of aluminum?
Answer:
Given parameters:
Amount of heat = 105calories
Mass of aluminium = 100g
Initial temperature = 20°C
Final temperature = 25°C
Unknown:
Specific heat of aluminium = ?
The amount of heat absorbed by a substance is the quantity of heat required to change the temperature of a system by 1°C.
Mathematically;
H = m C (ΔФ)
where H is the amount of heat
m is the mass of the substance
C is the specific heat
ΔФ is the change in temperature
Now to find specific heat capacity, we make it the subject of the formula of the expression;
C = [tex]\frac{H }{m x change in temperature}[/tex]
Change in temperature = Final temperature - initial temperature
= 25°C - 20°C
= 5°C
C = [tex]\frac{105calories}{100g x 5}[/tex] = 0.21cal/g°C
The specific heat of the aluminium is 0.21cal/g°C
Please help me with this problem for physics !
Answer:
2 m/s²
Explanation:
velocity =
[tex] \frac{20 - 0}{10} [/tex]
20/10 = 2
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
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
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.
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:
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.
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In a skateboard race, the winner covered 26 meters in 3.88 seconds . What was his speed?
A hollow circular nylon pipe (see fig) supports a load PA = 1750 lb, which is uniformly distributed around a cap plate at the top of the lower pipe. A second load PB is applied at the bottom. The inner and outer diameters of the upper and lower parts of the pipe are d1 = 2 in., d2 = 2.375 in., d3 = 2.25 in., and d4 = 2.5 in., respectively. The upper pipe has a length L1= 14in., the lower pipe length is L2 = 16 in. Neglect the self-weight of the pipes. -If PA remains unchanged, find the new value of PB (in lb) so that upper and lower parts have same tensile stress.
Answer:
The value of [tex]P_{B}[/tex] is 4586.20 lb.
Explanation:
Given that,
Load = 1750 lb
The inner and outer diameters of the upper and lower parts of the pipe are
[tex]d_{1}=2\ in[/tex]
[tex]d_{2}=2.375\ in[/tex]
[tex]d_{3}=2.25\ in[/tex]
[tex]d_{4}=2.5\ in[/tex]
Length of upper pipe = 14 in
Length of lower pipe = 16 in
We need to calculate the value of [tex]P_{B}[/tex]
Using tensile stress in upper segment
[tex]\sigma_{1}=\dfrac{P_{A}+P_{B}}{A_{1}}[/tex]....(I)
Tensile stress in lower segment
[tex]\sigma_{2}=\dfrac{P_{B}}{A_{2}}[/tex].....(II)
From equation (I) and (II)
[tex]\dfrca{P_{B}}{A_{2}}=\dfrac{P_{A}+P_{B}}{A_{1}}[/tex]
[tex]P_{B}A_{1}=A_{2}P_{A}+A_{2}P_{B}[/tex]
[tex]P_{B}(A_{1}-A_{2})=P_{A}A_{2}[/tex]
[tex]P_{B}=\dfrac{P_{A}A_{2}}{A_{1}-A_{2}}[/tex]
[tex]P_{B}=\dfrac{\dfrac{P_{A}}{A_{1}}}{\dfrac{1}{A_{2}}-\dfrac{1}{A_{1}}}[/tex]
[tex]P_{B}=\dfrac{\dfrac{1750}{\dfrac{\pi}{4}(d_{2}^2-d_{1}^2)}}{\dfrac{1}{\dfrac{\pi}{4}\times(d_{4}^2-d_{3}^2)}-\dfrac{1}{\dfrac{\pi}{4}\times(d_{2}^2-d_{1}^2)}}[/tex]
Put the value into the formula
[tex]P_{B}=\dfrac{\dfrac{1750}{\dfrac{\pi}{4}((2.375)^2-(2)^2)}}{\dfrac{1}{\dfrac{\pi}{4}\times((2.5)^2-(2.25)^2)}-\dfrac{1}{\dfrac{\pi}{4}((2.375)^2-(2)^2)}}[/tex]
[tex]P_{B}=4586.20\ lb[/tex]
Hence, The value of [tex]P_{B}[/tex] is 4586.20 lb.
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
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
definition of motion?
Answer: The action of something moving or being moved
Explanation:
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
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
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
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Answer:
(i) 234 and (ii) 90
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
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.
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.
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
is the change in position of an object
Answer:
Explanation:
In my opinion motion is the correct answer
A sports car and a minivan run out of gas and are pushed to the side of the road. Which is easier to push, and why?
the minivan, because it has more mass and therefore more inertia
the minivan, because it has less mass and therefore less inertia
the sports car, because it has more mass and therefore more inertia
the sports car, because it has less mass and therefore less inertia
Answer:
the last one
Explanation:
Just took the test
The sports car is easier to push because it has less mass and therefore less inertia.
What is mass and inertia?Inertial mass is the property of an object that determines how its motion changes when a force acts on it.
Inertia is the resistance of any physical object to a change in its velocity. This includes changes to the object's speed, or direction of motion. An aspect of this property is the tendency of objects to keep moving in a straight line at a constant speed when no forces act upon them.
The tendency of an object to resist changes in its state of motion varies with mass. Mass is that quantity that is solely dependent upon the inertia of an object. The more inertia that an object has, the more mass that it has. The amount of inertia an object has is determined by its mass. The mass of a substance or object is based on the number and density of atoms in it.
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Muscular strength is BEST described by
A. the ability of a muscle to contract repeatedly
B. the average metabolic efficiency of muscles
C. the force produced in a single maximum effort
D. daily levels of physical activity and exertion
Please select the best answer from the choices provided.
Α
В
C
D
Answer:
C. Muscular strength is the force produced in a single maximum effort.
Explanation:
Muscular has a definition similar to strength but strength is the ability to carry heavy things, Muscular is like having puberty, a(bs). So that is force with strength you can carry with force, in maximum affort.
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
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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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 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
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....
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.
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:
