Mintu wants to increase the heat transfer between a metal iron and another piece of metal he wants to shape. He decides to increase the time the two metals are in contact, use a larger metal iron, and use a new metal material with a higher specific heat.
Where is Mintu's error?
Mintu should have decreased the size of the metal iron.
Mintu should have decreased the time he touches the two metals.
Mintu should have chosen a material with a lower specific heat.
Mintu should have chosen a material the same temperature as the iron.
Answer:
C. Mintu should have chosen a material with a lower specific heat.
Explanation:
Sorry I'm late
I took the test and got 100%
Mintu's error is from, Mintu should have chosen a material with a lower specific heat.
Option C is correct
What is specific heat?The amount of heat required to raise the temperature of one gram of a substance by one Celsius degree is known as specific heat.
In conclusion,since Mintu wants to increase the heat transfer between a metal iron and another piece, Mintu should have chosen a material with a lower specific heat.
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Wendy runs 800m East on a straight road and then she turns west and runs back 200m back. What would be the distant she travelled and her displacement.
Answer:
Answer is C
Explanation:
I took it already
is it true or false that Genes contain the DNA that tell each cell in the human body how to operate.
Explanation:
it's true genes contain the DNA
A student has begun training for tryouts for cross country by running a two mile loop through
her neighborhood every evening. Part of the run is a very steep hill. One evening, the
student is running down the hill at a very quick pace when she notices a dog lying in the
middle of her path. To avoid hitting the dog, she tries to stop but has difficulty. With
effort, she is able to stop right before running into to the dog.
Explain why it was so difficult for the student to stop. In your response, be sure to
include:
○ the role of Newton’s first law in making it difficult for the student to stop.
○ the correct use of the term inertia.
○ why some objects in motion have more inertia than others.
Be sure to consider the completeness of your response, supporting details, and accurate
use of terms
Answer:cause they running down a steep hill
Explanation: that's a confusing question
A cyclist travels from A to B along the arc of a circle of radius 25 m as shown.
0 Calculate the distance travelled by the cyclist.
(ii) Calculate the displacement undergone by the cyclist.
A
4
25 m
12nn41
The displacement of the cyclist from point A to B is 39.3 m.
Displacement of the cyclist
The displacement of the cyclist is equal to the change between the final position and initial position of the cyclist. This can also be described as the shortest distance between two positions.
From the given image, the displacement of the cyclist from point A to B can be determined by formula for calculating length of arc,
D = (θ/360) x 2πr
D = (90/360) x 2π x 25
D = 39.3 m
Thus, the displacement of the cyclist from point A to B is 39.3 m.
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help pllzz i dont have much time
Answer:
C hurry
Explanation:
Hello!
Answer:
The answer is C
Wish you luck!!
An object with a mass of 2kg accelerates 3.5m/s2, what is the amount of force being applied to it?
Answer:
Force = 7N
Explanation:
Force = Mass x Acceleration = 2 x 3.5 = 7N
The lava lamp has a light bulb as a heat source at its base. The lamp contains a colored, waxy fluid that can be observed moving in clumps through a clear liquid. A lava lamp filled with orange blobs lit from below. As the clump of colored fluid at the bottom of the lava lamp reaches the top, which has increased? its density its temperature the kinetic energy of its molecules the space between its molecules.
As the clump of colored fluid at the bottom of the lava lamp reaches the top, Its temperature increases. Temperature directs to the hotness or coldness of a body.
What is temperature?Temperature directs to the hotness or coldness of a body. In clear terms, it is the method of finding the kinetic energy of particles within an entity. Faster the motion of particles more the temperature.
Temperature is essential in all areas of Science right from Physics to Geology and also it is important in most parts of our everyday life.
The clump of colorful fluid at the bottom of the lava lamp rises to the top because the clump, as the heavier liquid, absorbs heat and expands, becoming less dense and rising.
Due to this the temperature is increasing.Hence As the clump of colored fluid at the bottom of the lava lamp reaches the top, Its temperature increases
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Answer:
A density
Explanation:
all the others were wrong smh had to redo quiz after all
What is the electric potential energy of a charge that experiences a force of 3. 6 × 10–4 N when it is 9. 8 × 10–5 m from the source of the electric field?.
The electric potential energy of a charge that experiences a force of 3. 6 × 10⁻⁴ N when it is 9. 8 × 10⁺⁵m from the source of the electric field will be 3.528×10⁻⁸ V.
What is electric potential energy?Electric potential energy is the amount of work needed to move a unit charge from a point to a specific point against an electric field.
The given data in the problem is;
F is the electric force= 3. 6 × 10⁻⁴ N
V is the electric potential=?
d is the distance = 9. 8 × 10⁻⁵ m
The electric potential energy is given as the product of the electric force and distance.
V=Fd
V = 3.6×10⁻⁴ ×( 9.8×10⁻⁵)
V = 3.528×10⁻⁸ V.
Hence the electric potential energy of a charge will be 3.528×10⁻⁸ V.
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The star Aldebaran is a red giant star in the constellation Taurus, the Bull. Aldebaran is the eye of the bull and is about 65 light years away. What would happen if Aldebaran were to explode tonight
If Aldebaran were to explode tonight then we will be able to see this explosion on the Earth in approximately 65 years. A light-year is a distance that light travels in one (1) year.
What is a light-year?A light-year can be defined as a unit equal to the distance that light needs to travels in one (1) year on the Earth.
One light-year can be considered as a unit that equates to approx. 9.7 trillion kilometers (km) or 5.9 trillion miles.
In consequence, a light-year is a distance unit instead of a unit of time, and this unit was developed by Otto Ule.
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Which is the most common direction of motion in the solar system, both for orbital revolution and axial rotation?.
Answer:
Clockwise
Explanation:
All of the planets rotate the same way around the sun.
State the five important assumptionns of the kinetic theory of matter
Compare and contrast aerobic physical activity with anaerobic physical activity.
simple, please :)
Answer: ompare and contrast aerobic physical activity with anaerobic physical activity. ... Aerobic physical activity is better for the cardiovascular system than it is for strength endurance, while anaerobic physical activity is better at building strength endurance than it is at increasing cardiorespiratory fitness.
Explanation: hopefully this helped ;)
Answer:
Aerobic physical activity is actvity with motion. Anaerobic activity is the opposite. This means that it is an activity without motion.
2 examples of all 7 wave behaviors
Answer:
radio waves
microwaves
16. A pug puppy is sitting on a skateboard. The pug has a mass of 2.4 kg, and the skateboard has a mass
of 1.3 kg. Assuming the pug stays on the skateboard, what force would give the pug and skateboard an
acceleration of 3.2 m/s?? You may ignore friction. Be sure to follow significant digit rules.
Answer:
12 N
Explanation:
Use Newton's second law:
∑F = ma
F = (2.4 kg + 1.3 kg) (3.2 m/s²)
F = 11.84 N
Rounded to two significant figures, the force is 12 N.
1. The radius of Earth is 6.40 x 10° km. The moon is about 3.84 × 10' km away
from Earth and has a diameter of 3475 km. The Pacific Ocean surface, which
can be considered a convex mirror, forms a virtual image of the moon. What is
the diameter of that image?
Answer: 28.71 km
Explanation:
For the convex mirror (ocean):
Radius of curvature = 6.4*10^3 km
Focal length (f) = R/2 = 3.2*10^3 km
Object distance (u) = -3.84*10^5
Mirror formula: [tex]\frac{1}{u} + \frac{1}{v} = \frac{1}{f}[/tex]
[tex]\frac{1}{u} + \frac{1}{v} = \frac{1}{f}[/tex]
[tex]\frac{-1}{3.84*10^5} + \frac{1}{v} = \frac{1}{3.2*10^3}[/tex]
v = 3173.55km
Magnification, [tex]m = \frac{-v}{u} = \frac{-3173.55}{-3.84*10^5} = \frac{h_{i} }{h_{o} }[/tex]
So, height of image/height of object = 3173.55/3.84*10^5
Diameter of image = 3173.55/3.84*10^5 * 3475
Diameter of image = 28.71 km
Therefore, the diameter of the image is 28.71 km
What factors does the speed of a wave depend on?
The amplitude
The frequency
The wavelength
The medium
Answer:
I think 3 options are correct
The speed of a wave is dependant on three factors: wavelength, frequency, medium..
Hope it helpz~
Answer:
wavelength, frequency, medium
Explanation:
amplitude is the only one not correct.
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The toaster is switched on for 120 seconds the power of the toaster is 850 watts calculate the energy transferred by the toaster. Use the equation energy transferred = power x time
Explanation:
E=PT
so E= 850×120 so E = 102000
(c) A moving train has a kinetic energy of 8.1 x 10(power of 6)J.
The train makes an emergency stop.
It decelerates to rest in a distance of 270 m.
(i) Calculate the average friction force provided by the brakes.
answer
the friction force provided by the brakes is 30000 N.
What is friction force?Friction force is the force that opposes the motion between two bodies in contact.
To calculate the average friction force provided by the brakes, we apply the formula below.
Formula:
K.E = F'd............. Equation 1Where:
K.E = Kinetic energy of the trainF' = Friction force provided by the brakesd = distanceMake F' the subject of the equation
F' = K.E/d............ Equation 2From the question,
Given:
K.E = 8.1×10⁶d = 270 mSubstitute these values into equation 2
F' = (8.1 ×10⁶)/270F' = 30000 NHence, the friction force provided by the brakes is 30000 N
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A 120V Microwave uses 8A of current. It runs for 15 hours over the course of a month. If electrical energy costs $0. 11/KWh, what does it cost to run the microwave for the month
Answer:
1 kw-hr = 1000 w * 3600 sec = 3.6E6 Joules
E = P t = 120 J/C * 8 C/sec * 3600 sec /hr * 15 hr = 5.18E7Joules
where E is energy used by microwave
5.18E7 / 3.6E6 * .11 = $1.58 cost to run for 15 hrs
A roller coaster is moving at 20 m/s at the bottom of a hill. Three seconds later it reaches the top of the hill moving at 10 m/s. What was the acceleration of the roller coaster? SHOW YOUR WORK!
Answer:
acceleration equal to 0.5 m / s
Explanation:
since 20 x 0.5 = 10
When gas in a container expands to three times its volume at constant temperature, the gas pressure?
A) is one third.
B) is one ninth.
C) triples.
D) remains the same
Answer:
A) is one third
because according to Boyle's law pressure is inversely proportional to the volume
What process changes light energy to heat?
refraction
absorption
reflection
Answer:
Absorption and reflection is correct
Explanation:
Answer:
absorption
Explanation:
a good example of this is black tar that's been sitting in the sun for hours, over time it gets more and more hot until it starts burning your feet it's mostly because it absorbs the light and heat from the sun and doesnt release it. hope my example helped :)
Another good example of light getting absorbed from the sun is solar pannels :D
what is sound? what are the types of sound?
Answer:
Sound can be of different types—soft, loud, pleasant, unpleasant, musical, audible (can be heard), inaudible (cannot be heard), etc. Some sounds may fall into more than one category. For instance, the sound produced when an aeroplane takes off is both loud and unpleasant.
.
.
Please mark me as brainlist
Explanation:
sound is a form of energy which produces a sensation of hearing in our ears.
we are different types of sound around us everyday we are the sun for our making parents and friends to sound of Baker's running on the road the barking of dog the sound of elephant the clutter of pants in the kitchen.
radio television guitar animals battles machines Ekta some examples of sound
hope it helps
Which does not utilize the gyroscope effect? question 12 options:
a spiral pass in football
a spinning top
a flying plastic disk
a magnetic compass
A spinning top (also called easily a top) is a specific toy that does not utilize the gyroscope effect during its movement.
What is the gyroscope effect?The gyroscope effect refers to the characteristic that allows an object to maintain a constant direction of axis rotation when it is rotating.
This effect (gyroscope effect) mainly depends on the velocity of the object and its direction.
The gyroscope effect is exploited by many applications such as in missiles or satellites when they are in orbit.
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Which features would the scientists most likely see for samples from multicellular organisms
Answe
common checks
Explanation:
what do you mean by mechanical advantage is 2.5 of a machine?
Answer:
If you are using a machine that has a mechanical advantage of 2.5,you will have increased your EFFORT DISTANCE by 2.5 times. This allows you to REDUCE the EFFORT FORCE needed by 2.5 times.
What is the difference between a comet and an asteroid?.
Answer:
What is the difference between a comet and an asteroid?
Well, the difference between them is the composition which means what they're made of.
Asteroids are made of metals and rocky material.
Comets are made of Ice, dust, and again rocky material.
Hope this helps at least a little:) Have a nice day<3
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What occurs when someone places an ice pack on an injured ankle? Conduction causes the ice pack to lose thermal energy. Conduction causes the ankle to gain thermal energy. Cold from the ice pack is transferred to the ankle. Heat from the ankle is transferred to the ice pack.
Answer:
I think it is C. cold from the ice pack is transferred to the ankle
Explanation:
Hope I helped if I did plz give me brainiest thanks <3
Answer:
Hello
well u have already mentioned the answer in the question itself.....
Conduction causes the ice pack to lose thermal energy. Conduction causes the ankle to gain thermal energy. ... Heat from the ankle is transferred to the ice pack.
The best time to get my RESTING HEART RATE is right after I run.
true or false
Answer:
Your answer is: False
It is called a resting heart rate for a reason : )
Explanation:
Hope this helped : )
Answer: false
Your resting heart beat is when your heart beat is resting or calmed down. After you run, your heart is not so calmed. The answer is false.