Answer:
At the topmost point where the velocity has only horizontal component whereas the acceleration is vertical.
Explanation:
There is only a horizontal component of velocity at the ap3x of the projectile, and acceleration is vertically downwards owing to gravitation, therefore velocity and acceleration are perpendicular to one another.
What are voltage and current in electricity?
Answer:
Voltage, electric potential difference, electric pressure or electric tension is the difference in electric potential between two points, which is defined as the work needed per unit of charge to move a test charge between the two points.
Contrast series and parallel circuits in terms of what they look like and how they calculate Equivalent resistance
Let's see
For series connection
[tex]\\ \rm\Rrightarrow R_{eq}=R_1+R_2+R_3\dots[/tex]
For parallel connection
[tex]\\ \rm\Rrightarrow \dfrac{1}{R_{eq}}=\dfrac{1}{R_1}+\dfrac{1}{R_2}+\dfrac{1}{R_3}\dots[/tex]
A wire is run through a large piece of paper, forming a perpendicular angle with the paper. A bunch of magentically senstive iron shavings are spread across the paper and a current is run through the wire. Which of the following would be the most accurate description of what would happen?
A. The filings would shape themselves into a square shape around the wire, each corner of the square perpendicular to the central wire
B. The filings would form parallel lines across the paper, each one forming a perpendicular angle with the central wire
C. The filings would shape themselves into a circular shape around the wire, the direction rotating based on the direction of the flow of current
D. The filings would all be attracted magnetically towards the wire and will all be pulled into a central mass in close proximity to the wire and will leave the outer part of the sheet of paper bare
Answer:
Option C
Explanation:
As they are iron shavings they are magnetic i.e they can be attracted by magnet .So when electric current is passed through the wire they would form an electromagnetic field .And the shape is circularThe trait for flower color in a plant has red and white alleles. The red color is the dominant trait. What is the phenotypic ratio for a cross between plants with red (Rr) flowers and red (Rr) flowers?
4 red : 0 white
3 red : 1 white
2 red : 2 white
1 red : 1 white
Answer:
1.4 red : 0 white
Explanation:
Answer: A
Explanation:
Comets that come from the oort cloud have orbits that:
a. decay over time, bringing them closer to the sun each year.
b. have random tilts and orbits, sharing little with each other.
c. have very short orbits for their size and distance from the sun.
d. are evenly distributed between retrograde and prograde.
Comets that come from the Oort cloud have orbits that decay over time, bringing them closer to the sun each year. Option A is correct.
What are comets?Comets are frozen leftovers from the formation of the solar system composed of dust, rock, and ice.
They range from a few miles to tens of miles wide, but as they orbit closer to the Sun, they heat up and spew gases and dust into a glowing head that can be larger than a plane.
Comets that come from the Oort cloud have orbits that decay over time, bringing them closer to the sun each year.
Hence,option A is correct.
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Answer:
B) have random tilts and orbits, sharing little with each other
Explanation:
Hope this helps, have a great rest of your day/ restful night!
Help is appreciated!! :D
Explain the thermodynamics of a heat engine.
Answer:
See below ~
Explanation:
What is Thermodynamics ?Thermodynamics is the branch of science which deals with heat and other forms of energy. Main key terms in this topic include : work, temperature, entropy, etc.
===============================================================
Working of a Heat Engine :The function of a heat engine is to convert heat into mechanical energy.
It does this by bringing a working substance from a higher state temperature to a lower state temperature.
=============================================================
Formula for calculating the efficiency of a heat engine :[tex]e_{max} = W_{max} / Q_{max}[/tex]
- Thermodynamics can be applied to many physical systems, as long as the exchange of energy with the medium is known, regardless of the details of the interactions in those systems.
How much work done if an object is moving to the right and a force of 75. 0n is applied at 125 degrees to the motion while the object travels 7. 50m
Answer:
-322.64 J
Explanation:
75 N * cos 125 * 7.5 = -322.64 J
A mouse eats 20 kJ of energy. The mouse uses 8 kJ of energy moving around. What would most of the leftover energy be turned into? ant is the leftover energy useful or wasted?
Answer:
to be turned into glycogen not wasted
Explanation:
Since the body has a lot of energy left it will turn that energy into glycogen which is a storage form of glucose which will when neccassary will be converted into glucose from the horomone glucagon and be given to the body to be used as energy so the energy is never wasted
* if air is blown with a speed of 15 m/sec across the top of one side of a u-tube containing water, what will be the difference between the water levels on the two sides?
if air is blown with a speed of 15 m/sec across the top of one side of a u-tube containing water, the difference between the water levels on the two sides is 1.3 cm.
What is density?The density is the ratio of the mass and volume of the particular object or liquid.
Applying the Bernoulli's equation across the ends of the tube A and B, we have
[tex]P_{A} = P_{B} - \dfrac{1}{2} \rho Av^{2}[/tex]
Substituting ρ = 1.2 , v = 15 and [tex]P_{B }=P_{0 }[/tex]
[tex]P_{A}= P_{B} -135[/tex]
In the left limb, [tex]P_{A}= P_{C}[/tex]
In the right limb, [tex]P_{D}= P_{o} + \rho g h[/tex]
The pressure at C and D are same.
[tex]P_{D}= P_{C}[/tex]
Substituting from the above equations , we have,
h = -1.3 cm
The height to the left limb is greater.
The difference between the water levels on the two sides is 1.3 cm.
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the period of a 400 hertz sound wave is ___ second
Answer:
0.0025 sec
Explanation:
Period = 1 / frequency = 1/400 = 0.0025 sec
1- The wave length is the distance between the middle of a crest to the middle of the next trough
true
or
false
Answer:
False
Explanation:
Middle of crest to middle of NEXT CREST is wavelength
Explain How did Aristotle's inability to detect parallax lead him to propose a geocentric model of the solar system?
Answer:
Aristotle was blind, therefore could not see change in positions. Aristotle could see no detectable change in the positions of the stars, thought Earth was immovable.
Explanation:
The potential energy of an orange on a tree is 6.0 joules. The orange is 5m high. What is the orange's mass?
0.12 kg.
10 kg
100 g
1 kg
Where does the greatest atmospheric pressure occur.
Answer:
The atmospheric pressure is greatest at the bottom of the atmosphere. This is also where the air has its greatest density. Pressure and density decrease with height in the atmosphere. The earth's gravitational field pulls the mass of the atmosphere towards the earth's surface
The transformer in a stereo amplifier has a primary coil with 200 turns and a secondary coil with 40 turns. When the primary coil is supplied with 120-V AC, what voltage does the secondary coil provide
Answer:
Here is the answer..hope it helps:)
A metal spoon is put in a cup of hot tea and then put it into the mouth. The spoon is not very hot, but the tea is much hotter. Why?
Which statement best describes how ultrasound can produce an image?
Answer:
Choice D
Explanation:
Choice A is incorrect because the sound waves do not form within the body.
Choice B is incorrect because the sound waves echo back, they are not measured on the other side.
Choice C is incorrect because it states that the sound waves bounce off the body. They actually bounce off tissues inside the body, among other things.
calculate the resistance of the 1000 W microwave oven that gets plugged into a 110 v outlet
The resistance of the 1000 W microwave oven that gets plugged into a 110 v outlet will be 10 ohms.
What is resistance?Resistance is a type of opposition force due to which the flow of current is reduced in the material or wire. Resistance is the enemy of the flow of current.
The given data in the problem is;
P is the power= 1000 W
V is the voltage= 110 V
I is the current
R is the resistance
The resistance is found by the formula;
[tex]\rm P = \frac{V^2}{R} \\\\ \rm R = \frac{V^2}{P} \\\\ R = \frac{(100)^2}{10000} \\\\ R= 10\ ohm[/tex]
Hence, the resistance value will be 10 ohms.
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physics 13
physics geniuses where r u need help!!!
----------------------
pls also check other questions!
Answer:
Microphone
Explanation:
Microphone is the device which converts sound into electrical energy by electromagnetic induction
A sample of oxygen gas with a volume of 3.0 m3 is at 100 C. The gas is heated so that
it expands at a constant pressure to a final volume of 6.0m^3 what is the final temperature of the gas?
[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
According to Charles law, if pressure remains constant, volume varies directly with temperature. so we can infer that :
[tex] \qquad\sf{\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}} [/tex]
So, we can use this formula to find out the final temperature of the gas ~
Note : Take temperature in Kelvin ( 100°C = 373 K )
[tex]\qquad \sf \dashrightarrow \: \dfrac{3}{373} = \dfrac{6}{x} [/tex]
[tex]\qquad \sf \dashrightarrow \: x = \dfrac{6}{3} \times 373 [/tex]
[tex]\qquad \sf \dashrightarrow \: x = 2 \times 373[/tex]
[tex]\qquad \sf \dashrightarrow \: x =74 6 \: K[/tex]
Now, convert it to Celsius ~
i.e 746 - 273 = 473° C
So, the final temperature of the gas will be equal to 473° C
What wave on the electromagnetic spectrum has the highest frequency?
Answer:
Explanation:
Answer: Gamma rays
Gamma rays have the highest frequency.
What is an electromagnetic wave?
An electromagnetic wave requires no medium for its propagation.
It consists of a spectrum of different wavelengths.
Different wavelengths of rays have different energies and different frequencies.
Higher frequency rays have the highest energies.
What is gamma-ray?
These are ionized radiations.
Gamma radiations are obtained from the decay of the atomic nucleus.
It has the highest frequency which is why it can penetrate through matter.
It has the smallest wavelength and highest energy.
The frequency of gamma rays is more than 10^19 cycles per second and wavelength less than 100 picometers.
Answer:
Gamma Rays
Explanation:
Each part of the electromagnetic (EM) spectrum comprises photons with distinct energy levels, wavelengths, and frequencies. Gamma rays are the most energetic, have the shortest wavelengths, and have the highest frequencies.
What portion of the electromagnetic spectrum is used for mass spectrometry
The energy of the electromagnetic spectrum is not used in mass spectrography to make measurements.
What is mass spectrometry?In physics and chemistry, mass spectrometry refers to statistical analytical techniques that allow scientists to determine the mass distribution of various types of molecules based on their mass on a substance.
The energy of the electromagnetic spectrum is not used in mass spectrography to make measurements. The process of mass spectrometry is primarily based on the interaction of molecules with a beam of electrons (rather than photons) and the subsequent measurement.
Hence the energy of the electromagnetic spectrum is not used in mass spectrography to make measurements.
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Ip three resistors, r1r1r_1 = 11 ωω , r2r2r_2 = 68 ωω , and r3=rr3=r, are connected in series with a 24. 0 vv battery. The total current flowing through the battery is 0. 20 aa
The three resistances are connected in series, their equivalent is equal to the addition of all the resistances. The unknown value of resistance is 1.74 ohm.
What is resistance?The resistance is the opposition offered to the flow of current.
Given the value of resistance R₁ is 1 ohm, R₂ is 68 ohm and R₃ is R.
The total current flowing through the battery of voltage 24 V is 0.20 Amperes.
From the ohms law, The equivalent resistance is
[tex]R_{eq}[/tex] = Voltage / Current
The equivalent resistance is
[tex]R_{eq}[/tex] = R₁+ R₂+R₃
24 / 0.20 = 1+68+R
R = 1.74 ohm
The unknown value of resistance is 1.74 ohm.
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A 200g air-track glider is attached to a spring. The glider is pushed in 10cm and released. A student with a stopwatch finds that 10 oscillations take 12. 0s. What is the spring constant?
The spring constant will be k= 5.5N/m for a 200g air track glider attached to a spring.
What is spring constant?The spring constant, k, is a measure of the stiffness of the spring. It is different for different springs and materials.
Calculation for What is the spring constant
First step is to calculate the time period
T = 12 second/10
T = 1.2 second
Now let calculate the spring constant using this formula
[tex]k=\dfrac{4\pi ^2m}{T^2}[/tex]
Where,
m=0.2kg
T=1.2second
k represent spring constant=?
Let plug in the formula
[tex]k=\dfrac{4 \pi \times 0.2}{(1.2)^2}[/tex]
[tex]k=\dfrac{39.48\times 0.2}{1.44}[/tex]
[tex]k=\dfrac{7.90}{1.44}[/tex]
k=5.48 N/m
k=5.5 N/m ( Approximately)
Therefore the spring constant will be 5.5 N/m
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What is an animal that lays eggs in nests and some of it's genuses lack the ability
hint: it is 5 letters long
another hint : _ _ r _ s
Answer:
I think is cookoo because i learn it from web
Explanation:
I found it in web so yea
an example of inertia is when your body flies forward when you slam on the breaks.
a,true
b,false
help :
Answer:
A True ( I Think Its True I'm Not Intirely sure)
Explanation:
Answer:
true
Explanation:
True.....when you apply the brakes to slow down, your body's inertia wants ot keep moving forward
Both a transverse wave and a longitudinal wave have.
Answer:
Both waves are mechanical waves
The voltage across two points in an electric circuit is
876 mV. A power source does 1 901 kJ of work
when moving a certain amount of charge between
these two points.
Determine the amount of charge that moved between
between the two points.
Answer:
V=w/q V= 1.2/0.4* 10 ^-3 V = 3 * 10 ^ 3 V = 3000 v
if its not correct let me know so I can figure it out
A string of 5 (Five) 15 ohm Christmas tree lights are connected in parallel. One burns out, the rest will stay lit. Calculate the total resistance when one of the bulbs is out.
Pt 2.
Those five 15 ohm, series connected Christmas tree lights, calculate the total current in the circuit if they are connected to a 115 V source. What would be total power?
Pt. 3
Those five 15 ohm parallel connected Christmas tree lights. Calculate the total current in the circuit if they are connected to a 115 V source. Calculate total Power.
Please list formula and data etc etc
Answer:
r = 15 ohms for a single bulb
1 / R = 1 / r + 1 / r + 1 / r + 1 / r
R = r / 4 = 15 / 4 = 3.75 ohms total resistance
part II
If bulbs are in series R = 5 * 15 ohm = 75 ohm total resistance
P = I V = V / R * V = V^2 / R
P = 115^2 / 75 = 176 watts
part III
If the bulbs are in parallel then
R = 15 / 5 = 3 ohms for the circuit
I = 115 / 3 = 38.3 amps for circuit
P = 115^2 / 3 = 4400 watts
Check: P = I V = 38.3 * 115 = 4400 watts
Which of the following is NOT a sign of extreme dehydration:
A. Severe headache
B. Dry chapped lips
C, Sweating excessively
D. Dark yellow urine
Since dehydration is due to lack of water, sweating excessively is Not a sign of extreme dehydration.
What is dehydration?Dehydration is a condition in which the body lack a enough water necessary for metabolic activities.
Dehydration results in extreme physical conditions of the body such as fatigue.
Some signs of extreme dehydration include:
Severe headacheDry chapped lipsDark yellow urineTherefore, sweating excessively is Not a sign of extreme dehydration.
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