Answer:
"One calorie of heat is defined as the amount of heat needed to raise the temperature of one gram of water by one degree Celsius"
Hope this Helps!
Explanation:
One calorie of heat is defined as the amount of heat needed to raise the temperature of one gram of water by one degree Celsius (or one kelvin).
For brainliest and 100 points
Ben is pushing a small trolley 10 N to the north and but Gary is pushing the trolley 5 N to the south. What is the total applied force on the trolley?
5N
2N
20N
40N
Answer:
The total applied force on the trolley is 5 N toward the North.
Explanation:
yes
How much heat does it take to melt a 0.234 kg ice cube at its melting point?
Answer:
Q = M kg* 3.33E5 J / kg = .234 * 3.33E5 = 7.79E4 Joules
As a check (using 80 cal/gm as latent heat of fusion for water)
234 g * 80 cal/gm = 18720 cal
1 cal = 4.19 J
18720 cal * 4.19 J / cal = 7.7E4 J agrees with value found above
If a 20g bullet has a momentum of 8kg calculate its velocity
Explanation:
I hope this helps, you can ask any questions for clarification
A light wave was calculated to have a length of 4x10^-7 m. what would the energy in the wave be?
λ = 5 x 10^-7 m, i.e the wavelength
to find:the energy in the wave.
solution:= c / λ
c =( 3 x 10^ 8 m/s)
f = 3x10^8ms-¹ /5 x10^-7m
= 6x10^14 Hz.
A student measures the voltage and current between two points in an electrical circuit. If the voltage is 220 V and the current is 1.2 A, what is the resistance, according to Ohm's law?
A. 2190
B. 2640
C. 1830
D. 0.0050
Answer:
Your answer is C
Explanation:
V=IxR
220 divide by 1.2=183.0
The answer was probably a type error so it should be C
Applying definitions Samantha ran 90 meters in 35 seconds to catch up with her dog. When she got to him, she played with him for 70 seconds before they walked back in 75 seconds. Did Saman tha travel at constant speed? What was Samantha's average speed?
No, Saman didn't travel at constant speed
v₁ = 90/35 = 2.57 m/s
v₂ = 0
v₃ = 90/75 = 1.2 m/s
Average speed = total distance/time
Average speed = (90+90)/(35+70+75) = 1 m/s
A train travels north at 103 km/hr. Is this an example of speed, velocity, or acceleration?
Answer:
velocity
Explanation:
when a speed is given with a direction it is velocity
Answer:
Velocity
Explanation:
Velocity is the rate, and direction of an objects movement.
Speed is the rate of and objects movement, no certain direction.
Acceleration is the rate when velocity changes over time, it can both increase and decrease, and it has both speed and direction.
I hope this helps! Have a great day!
Your Murderer~
What is the angular speed, in rad/s, of a flywheel turning at 813. 0 rpm?.
Answer:
The angular speed will be 85.13 rad/sec
Explanation:
Why are alloys made from many metals
Answer:
It add strength to the metal, along with other enhanced chemical properties. Hardness, machinability, and corrosion resistance are other properties that can be added or enhanced by creating an alloy.
I hope my answer helps you.
Two thermometers are calibrated, one in degrees Celsius and the other in degrees Fahrenheit. At what temperature are their readings numerically the same
Answer:
To change degrees Celsius in degrees Fahrenheit, the formula is:
F = 1.8C +32F=1.8C+3
Explanation:
C = 1.8C +32C=1.8C+32
C = -40C=−40
T=-40+273.15=233.15\ KT=−40+273.15=233.15 K
1. A woman shuts her summer cottage up in September and returns to June. No one has entered the cottage in the meantime
Explain what she is likely to find, in terms of the second law of thermodynamics.
The hot summer cottage she left in September will still be hot when she returns in June as long as no one enters it (Isolated).
What is second law of thermodynamics?The second law of thermodynamics states that, hot things always cool unless you do something to stop them. Or the total entropy of an isolated system can never decrease.
In other words, not all heat energy can be converted into work in a cyclic process.
Therefore, we can conclude that when the woman returns, the hot summer cottage she left in September will still be hot when she returns in June as long as no one enters it (Isolated).
Learn more about second law of thermodynamics here: https://brainly.com/question/1022530
Use the table to answer the question.
Planet
Estimated Mass of Planet (1024 kg)
Venus
4.87
Mars
0.642
Jupiter
1.898.0
Neptune
102.0
A spacecraft flies within 500.000 km of each of these planets. Which one would gravitationally attract the spacecraft the most?
3
Venus
Mars
Jupiter
Neptune
Answer:
Jupiter is by far the largest.
G = K M / R^2 = K C M since R is given as 5E5 km
G = gravitational attraction
The headlights of a typical car are powered by a 12 v battery. What is the resistance of the headlights if they draw 3.0 A if a current when turned on
Answer:
4 ohms
Explanation:
V = I R
12 = 3 R
R = 4 ohms
Name all the energy transfers that occur to make a solar-powered traffic light work (name what generates the energy, and what kind of energy it turns to):
problem: Asteroid Field.
Answer:
An asteroid is a minor planet of the inner Solar System. Historically, these terms have been applied to any astronomical object orbiting the Sun that did not resolve into a disc in a telescope and was not observed to have characteristics of an active comet such as a tail.
You travel 200 kilometers in the first two hours. During the next hour, you stop for lunch and only travel 25 kilometers. What was your average speed?
Answer:
75 km/hour
Explanation:
Total distance travelled= 200+25 = 225 km
Total time= 2+1 hours = 3 hours
Average speed= Total Distance/Total time = 225/3 = 75 km/hr
A man standing between two walls fires a gun and hears two echo. if he stands 200m closer to one of the wallsand the time differenve between the two echos is 0.176seconds,detrmine the distance between the walls(sped of sound in air is 340m/s)
Answer:
850m
Explanation:
The answer should be 850m
I apologize if it is incorrect-
Have a great day!
Anygays-
Which name is given to the force that stretches the spring with a metal that weights it down
Answer:
gravity
Explanation:
ok what i understand from your query is that a spring balance with a metal piece attached to it is weighing it down, a spring balance is measured in newtons (f=ma), the acceleration part is gravity (-9.81 m/s^2). The metal piece is attached to the string.
hope this answers your question and please take my answer with a grain of salt and refer to some webpages or videos
Hello people ~
Quantisation of charge implies _____
(a) charge cannot be destroyed
(b) charge exists on particles
(c) there is a minimum permissible charge on a particle
(d) charge, which is a fraction of a coulomb is not possible.
(d) charge, which is a fraction of a coulomb is not possible.
Explanation:
Quantisation implies that the charge, which is a fraction of a coulomb is not possible.
charge which is less than that on electron is not possible.everything has a charge (electrons)Basic minimum charge = 1.6 x 10⁻¹⁹
Answer:
Option D
Explanation:
Let's see
According to quantization of charge property
Q=ne wher n is a integerSo
it means that charge should be integer always like 5e,-7e ,3C etc.
But
frcation of coulomb denotes to rational number i e set Q hence its not possible
Hello people ~
On charging by conduction, mass of a
body may
(a) increase
(b) decreases
(c) increase or decrease
(d) None of these
increase or decrease
body gains mass when gets negative charge/electronsbody losses mass when gets positive charge/losses electrons
Thus the mass may increase and decrease due to conduction || varies
g Two point charges -6 C and -8 C charge are 12 cm apart. What is the magnitude of the electric field at a point half-way between the two charges
Explanation:
q1 = -6
q2 = -8
d^2 = (6/100)^2 = 0.0036
k = 1/4*(pi*E) where E js the permittivity of free space
F = (k*q1*q2)/(d^2)
Substitute your values into this equation and solve
An ideal gas, initially at a volume of 2.4 L and
pressure of 5 kPa, undergoes isothermal expansion until its volume is 6 L and its pressure
is 2 kPa.
A) Calculate the work done by the gas during
this process.
Answer in units of J.
B) find the heat added to the gas during this process.
Answer in units of J.
(a) The work done by the gas during this process is -10.8 J.
(b) The heat added to the gas during this process is 10.8 J.
Work done by the gas against an external pressureThe work done by the gas during the isothermal expansion is calculated as follows;
W(net) = ΔP x ΔV
W(net) = (2 kPa - 5 kPa) x (6L - 2.4 L)
W(net) = (-3kPa) x 3.6L
W(net) = -10.8 kPa.L
W(net) = -10.8 J
Heat added to the gasW = - Q
-10.8 J = -Q
Q = 10.8 J
Learn more about isothermal expansion here: https://brainly.com/question/17192821
Hello people ~
Question: A hemisphere is uniformely charged positively. The electric field a point on a diameter away from the centre is directed
(a) perpendicular to the diameter
(b) parallel to the diameter
(c) at an angle tilted towards the diameter
(d) at an angle tilted away from the diameter
As the electric field is present at a point on diameter the electric field intensity at the electric field components are parallel to the diameter hence they cancel out .
So the field is directed perpendicular towards the diameter
Option A
a material used by living things for growth and other life functions is a?
Answer:
I believe it wouled be Nutrients
Explanation:
hope this helps if not please let me know
Whoever is good at physics, can you help me with these questions?
Answer:
i honestly do not know the awnser , im just setting up my brainly account
Answer:
Q)32) What is the unit of intensity of sound
Ans)Decibel
Q)33) Relate amplitude and distance to the intensity and loudness of sound
Ans)The average amount of energy passing through a unit area per unit of time in a specified direction is called the intensity of the wave. As the amplitude of the sound wave increases, the intensity of the sound increases. (i can't find the answer for distance and loudness i can't find it on g....o...o....g....l.....e and my textbook u will have to search it on ur own sorry)
Q)34) What is the pitch of sound
Pitch is the rise and fall of our voice when we speak. It is the characteristic of sound by which we can distinguish the sounds of the same loudness. Types: Pitch is generally of two types, high pitch and low pitch. High Pitch: The higher the frequency of the sound, the higher will be the pitch.
Q)35) How is pitch of sound related to its frequency of sound waves?
The sensation of a frequency is commonly referred to as the pitch of a sound. The pitch of the sound we hear depends on the frequency of the sound wave. A high frequency sound wave has a high pitch, and a low frequency sound has a low pitch.
Q)36) Define the Doppler effect?
The apparent change in the frequency of sound due to the relative motion between the source and the observer is called the Doppler effect.
Q)37) Explain why the doppler effect occurs
The Doppler effect, or Doppler shift, occurs when the movement of an observer relative to a source (or vice versa) causes a change in wavelength or frequency.
Sorry i can't find the last one i will try to search it afterwards
A plane's propeller has a rotational inertia of 2.0kg * m ^ 2 After a clockwise torque of 4.0Nm was applied to the propeller for 4.0s, the propeller has a clockwise angular speed of 24 * (rad)/s What was the initial angular momenturn of the propeller before the torque was applied ?
The initial angular momentum of the propeller before the torque was applied will be 32 kg m²/s.
What is torque?Torque is the force's twisting action about the axis of rotation. Torque is the term used to describe the instant of force. It is the rotational equivalent of force. Torque is a force that acts in a turn or twist.
The amount of torque is equal to force multiplied by the perpendicular distance between the point of application of force and the axis of rotation.
The given data in the problem is;
The rotational inertia is,I = 2.0 kg m²
The clockwise torque is, T = 4.0Nm
The time period is,t= 4.0s,
The angular speed is,ω= 24 * (rad)/s
The initial angular momentum of the propeller is,I₀
The angular acceleration is found by the relation;
[tex]\rm \tau = I \times \alpha \\\\ \alpha =\frac{\tau}{i} \\\\ \alpha =\frac{4.0}{2.0} \\\\ \alpha= 2.0 \ rad/sec^2[/tex]
The initial angular velocity is found as;
[tex]\rm \omega_f = \omega_0 + \alpha t \\\\ \omega_0 = \omega_f -\alpha t \\\\ \omega_0 =24 -[(-2.0)\times 4.0)] \\\\ \omega_0 = 16 \ rad/sec[/tex]
The initial angular momentum of the propeller is found as;
[tex]\rm L_0 = I \omega_0 \\\\ L_0 = 20 \times (1.6) \\\\ I_0 = -32 \ kgm^2/s[/tex]
Hence,the initial angular momentum will be 32 kg m²/s.
To learn more about the torque, refer to the link;
brainly.com/question/6855614
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Answer: 14 kg•m2/s
Explanation:
Trust me it’s from khan
Visible light has a range of wavelengths from about 400-750 nm. Which of these wavelengths is
most likely seen as the color red?
Answer:
600-750
Explanation:
The red color in the visible region lies in the wavelength of 600 – 750 nm. The visible light spectrum is the fraction of the spectrum that is visible to humans.
What is wavelength ?The distance between two successive troughs or crests is known as the wavelength. The peak of the wave is the highest point, while the trough is the lowest.
The wavelength is also defined as the distance between two locations in a wave that have the same oscillation phase.
The length of a wave is measured in its propagation direction. The wavelength is measured in meters, centimeters, nanometers, and other units since it is a distance measurement.
The portion of the spectrum visible to the human light is known as the visible light Spectrum.
Visible light has a range of wavelengths from about 400-750 nm. The red color in the visible region lies in the wavelength of 600 – 750 nm.
To learn more about the wavelength, refer to the link;
brainly.com/question/7143261
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A girl is travelling on her bike at a speed 2.54 m/s. If the girl and her bike have a kinetic energy of 193 J, what is the combined mass of the girl and her bike? Show all your work.
Answer:
About 59.83 kg
Explanation:
The formula for kinetic energy is [tex]KE = \frac{1}{2}mV^2[/tex], where KE = Kinetic Energy in Joules (J), m = mass in kilograms (kg), and V = Velocity in meters per second (m/s).
In this problem, we are given the Kinetic Energy amount as 193 Joules and the Velocity as 2.54 m/s. Let's plug it into our equation
[tex]193 = \frac{1}{2} * 2.54^2m[/tex]Now, let's solve this equation.
Step 1: Simplify both sides of the equation.
[tex]193 = 0.5 * 2.54 * 2.54 * m[/tex] [tex]193=3.2258m[/tex]Step 2: Divide both sides by 3.2258.
[tex]193/3.2258 = 3.2258m/3.2258[/tex] m ≈ 59.830 kilograms.
A bowling ball has a mass of 3 kg & is moving at a speed of 10 m/s.
What is its kinetic energy?
Answer:
150 j
Explanation:
K.E. = 1/2 m v ^2
= 1/2 * 3 * 10^2 = 150 j
You are sitting at a coffee shop and you overhear a conversation at the next table. Two mothers are discussing their teen children and complaining about their behavior- erratic and irrational behavior, displaying little to no logic and reason. One says to the other, I just don’t know who he is. You have just listened to the NPR article and learned about the Endocrine System. You offer the following advice……
Answer:
Explanation:
Our five-year-old, Gabriel, is a very bright, funny, charming little guy. But he still has a lot of tantrums, which we thought would be over by this age. He reacts very poorly to consequences. He will get very threatening and aggressive physically and verbally: slamming doors, hitting, and lashing out verbally. We are constantly negotiating with limit setting. When we hold to the limit, he will escalate and sometimes will have very intense tantrums that can last over 30 minutes. When he is happy, he is the most delightful child. But the second something doesn’t happen exactly how or when he wants it, he is explosive. We are totally exhausted
