Answer:
At most temperatures, silver has lowest resistivity.
However, superconductors have zero resistivity, which is the lowest. Superconductors are real, they are primarily used in very powerful magnets (such as in CERN). Known superconductors require VERY low temperatures which require expensive technology.
There is ongoing research to find compounds that exhibit room temperature superconductivity. If (when?) one or more is found, major changes to electricity as we know it will result. Not only will we be able to make very powerful magnets (for use in very powerful motors, generators, etc.), but the power companies will be able to move electricity from the generator to the user without loss. Today typical power transmission losses are between 8% and 15%. There may also be important benefits to computer and processing capabilities.
Hope this helps! :D
Watching your mother bake bread, you learned that the dough of the bread rises because yeast acts on the sugar and releases gas. You wonder whether the amount of sugar used will affect the size of the bread. That is, if you add more sugar, the size of the bread will be larger. Your mother’s recipe calls for 60 grams of sugar to produce a loaf of bread about 1260 cm3 what is the problem
Answer:
The question is not complete, below is the completed question:
Watching your mother bake bread, you learned that the dough of the bread rises because yeast acts on the sugar and releases gas. You wonder whether the amount of sugar used will affect the size of the bread. That is, if you add more sugar, the size of the bread will be larger. Your mother’s recipe calls for 60 grams of sugar to produce a loaf of bread about 1260 cm3. What is the independent and dependent variables?
Answer:
independent variable: amount of sugar used
Dependent vairable: size of bread
Explanation:
In a scientific experiment, there are two main types of variables; independent and dependent variable:
Independent variable: This is the variable that is completely under the control and manipulation of the experimenter. The values of this variable can be varied at will, and the effect of the variation affects the dependent variable. In this example, the independent variable is the amount of sugar used, because the amount of sugar used is determined by the baker.
Dependent variable: The dependent variable is the variable that changes as a result of the manipulation of the independent variable. It is not directly under the manipulation of the experimenter, and it is the variable that the experiment seeks to study. In this example, the size of the bread is the dependent variable because it depends on the amount of sugar used.
A 25 newton force applied on an object moves it 50 meters. The angle between the force and displacement is 40.0 degrees. What is the value of work being done on the object
an object is moving to the right and speeding up. Its acceleration is
A. positive
B. Negative
C. zero
Answer:
Positive
Explanation:
Answer:
positive
Explanation:
i'm reallt sorry if I'm wrong
Enzo investigated the effect of different types of fertilizers on the growth of bean plants. He hypothesized that fertilizer B would result in the greatest amount of growth. However, the results showed that the control plants without fertilizer had the greatest growth. Why was Enzo's data still valuable even though it did not support his hypothesis?
Answer:
The answer is "In this information, Enzo will be confident that if any fertilizer is required only for plants".
Explanation:
The Beans plants were members of the group of legumes. Legume flowering plant under which the roots form nodules. These nodules require a specific bacterium called bacteria, which fix nitrogen. Its bacterium transforms nitrogen from the atmosphere into the soil's nitrate. Consequently, for some of its growth, beans do not require fertilizer.
the different phases of the moon are caused by the moon's near 28-day_
Answer:
lol
Explanation:
a boat is moving 1.3m/s N while the steam current is pushing the boat 2.2m/s What is the resultant velocity( I also need the givens,and the formula as well as the answer please and thank youuu)
Answer:
6) 2.6 m/s, 31°
7) 9.2 m/s
8) 1.2 s
Explanation:
I'll do #6, #7, and #8 as examples. You can solve #9 using the equation from #7, and #10 using the equation from #8.
6) Take north to be +y and east to be +x.
Given:
vₓ = 2.2 m/s
vᵧ = 1.3 m/s
Find: v
v² = vₓ² + vᵧ²
v² = (2.2 m/s)² + (1.3 m/s)²
v ≈ 2.6 m/s
θ = atan(vᵧ / vₓ)
θ = atan(1.3 / 2.2)
θ ≈ 31°
7) Given:
Δy = -4.3 m
v₀ = 0 m/s
a = -9.8 m/s²
Find: v
v² = v₀² + 2aΔy
v² = (0 m/s)² + 2 (-9.8 m/s²) (-4.3 m)
v ≈ 9.2 m/s
8) Given:
Δy = -6.7 m
v₀ = 0 m/s
a = -9.8 m/s²
Find: t
Δy = v₀ t + ½ at²
-6.7 m = (0 m/s) t + ½ (-9.8 m/s²) t²
t = 1.2 s
What force is needed to accelerate a 75 kg boy 3 m/s squared on a bike?
Answer:
The answer is 225 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × accelerationFrom the question we have
force = 75 × 3
We have the final answer as
225 NHope this helps you
difference between acceleration and decceleration
acceleration is considered to describe an increase or positive change of speed or velocity But deceleation is considered to describe a decrease or negative change of speed or velocity
2. A pitcher threw a baseball straight up at 39 meters per second. What
was the ball's velocity after 2.50 seconds?
The south pole of a magnet is brought near to a solenoid, which is connected to an ammeter. As the magnet is moved towards and away from the point P, the ammeter shows deflection. What magnetic pole is produced at P when the south pole of the magnet is brought towards and away from the solenoid.
Answer:
This question appears incomplete
Explanation:
However, this question seeks to seek our knowledge of Lenz law which states that the current produced by an induced emf (electromotive force) moves/flows in the direction opposite to the change in flux that induced the emf.
From this law, it can be noted from the question that the magnetic pole produced (at P), when the south pole of the magnet is brought towards the solenoid, is the south pole while the magnetic pole produced (at P), when the south pole of the magnet is taken away/changed from the solenoid, is the north pole.
It should be noted that solenoid is an electromagnetic device (and can hence be used to induce emf) that can convert electrical energy to mechanical energy.
What is the mass of the block of iron that has a density of 7.87 g/cm3. Its volume measurements are 2 cm x 10 cm x 5 cm.
1.A storm is moving toward your house at a speed of 30 km/hr. It is now 60 km away from your house. In what time will the storm reach your house?
Carsten is walking down the street while maintaining a constant velocity of 5.0 m/s west. At time t = 0.0 s, Carsten is 250 m west of point A. What is his displacement from the starting position at 60.0 s? *
Answer Format: # units direction
Answer:
550 meters west
Explanation:
Givens: Inital velocity/vi= 5.0m/s, time/t=60.0s, acceleration/a= 0 because a constant velocity means 0 acceleration, inital position/xi=250m
Unknown: final position/xf=?
Formula: xf=xi+vi(t)+1/2at^2
xf=250m+5.0m/s(60.0s)+1/2(0)(60.0s)^2
xf=250m+300m
xf=550m west
its still west because he never chhanged direction therefore his postion kept increasing.
why is lightning seen before thunder is heard?
Answer: Lightning is seen before thunder is heard" is correct about thunderstorms
Explanation:
A "thunderstorm" is a disturbance in weather that is related with lightning, dense clouds, heavy rain, hail or thunder. During a thunderstorm, lightning is always seen before thunder because the speed at which the light travels is faster than that of sound's speed.
Also, thunder's noise could be heard up to 10 km away from lightning flash. The thunder sound lasts for a few seconds. The thunder makes noise because of the rapid and fast expansion of the heating of the air.
Pls mark as brainliest!
Answer:
because light is faster than sound
Explanation:
the speed of light is 299 792 458 m / s
and the speed of sound is 343 m / s
please help 25 points!
How long would it take you to run a 21 km race (a half marathon) if your average speed is 14 km/h?
How much TIME will it take you to finish the race?
a. 1.5 hours
b. 1.5 km/km/h
c. 0.7 hours
d. 0.7 km/hour
e. 294 hours
Answer:
A
Explanation:
t=s/t
t=21km/h:14km/hr
t=21/14* km/km *hr
t=1,5 hr
Answer:
A
Explanation:
To run a 21 km race at a 14 km/h would take 1.5 hours
Roxy is driving down East Capitol Street. She drives 1380 meters in 45 seconds. Assuming she does not speedup or slow down, what is her speed in meters per second? * Your answer
Answer:
30.66667
Explanation:
should be the answer if the calculator is correct
what is my real name
Answer:
Probably Trent or something like that
Answer:
Trent or tranthjhikjhjhuiivd
A 12 V battery produces a current of 6 amps. What is the resistance?
Answer:
The resistance is 2 ohms
Explanation:
Hopes this helps.
A motorcycle travels at a constant 20 m/s for 10 s. How far has it traveled?
write dimention of plane angle work resistance density torgue
Torque : ML^2T^–2
Density : ML^–3
Work : ML^2T^–2
Plane angle: dimensionless quantity
Resistance : M^1 L^2 T^-3 I^-2
Alfredo is trying to measure the speed that cars travel down the street outside of his house. Outside his house there is a stoplight, and then another stoplight about ½ mile down the road. Alfredo says, "I can use my watch with a second hand to time the cars from when they leave the first light and stop at the next light. To find the speed I can just take the ½ mile distance and divide by the time." What are two flaws with Alfredo's plan which will not allow him to see how many cars are speeding on his street? Also explain how you would revise the experiment to avoid these problems
Answer:
drastic assumption that the car moves along the path at the same speed,
hese failures, it would be necessary to take the time of each type of trajectory, accelerated, constant and decelerated, this method is not easy since it implies knowing the distance in each type of movement,
Explanation:
In this exercise Alfredo makes a drastic assumption that the car moves along the path at the same speed, in reality the car when leaving the first traffic light accelerates until it reaches a speed, then remains constant and decelerates to be able to stop at the second traffic light.
To overcome these failures, it would be necessary to take the time of each type of trajectory, accelerated, constant and decelerated, this method is not easy since it implies knowing the distance in each type of movement, another method would be that the two traffic lights were in green so that the vehicle can run with constant speed throughout the trajectory
An Inuit pushes a loaded dogsled with a mass of 600.0 kg over the frictionless surface of hard-packed snow. He exerts a constant 150.0 N force as he does so.
What is the sled's acceleration?
Given parameters:
Mass of Dogsled = 600kg
Force = 150N
Unknown:
Acceleration of the sled = ?
Solution:
Force is a physical quantity and can be expressed as a product of mass and acceleration.
Force = mass x acceleration
Since acceleration is unknown, we input the parameters and solve for it;
150 = 600 x acceleration
Acceleration = [tex]\frac{150}{600}[/tex] = 0.25m/s²
The acceleration of the sled is 0.25m/s²
For sediment to be transformed into rock, which set of processes must take place?
crystallization and solidification
weathering and erosion
compaction and cementation
melting and spreading
Answer:
C. compactation and cementation or A. crystallization and solidification
Explanation:
Answer:
i think its a sorry if im whrong and good luck! :)
a sydiver jumps out of a plane. She fall dowward at a very fast speed. Which force is acting upon it?
Answer:
There will be two forces acting on her: Gravitational force and Air resisitence
What do all muscles have a store of, which is used for fuel?
O A. Oxygen
O B. Protein
O c. Carbohydrates
O D. Glycogen
Answer:
D. Glycogen
Explanation:
the major fuels for muscle are glucose fatty acids, and ketone bodies. muscle differs from the brain in having a large store of glycogen
Answer:
D. Glycogen
Explanation:
About 3/4 of all the glycogen in the body is stored in muscle.
Need help on this question??please
The real advantage to hydrostatic weighing is that it __________.
A.
can be done anywhere with no equipment
B.
gives one of the most accurate measurements of body fat
C.
uses calipers to measure body fat
The real advantage to hydrostatic weighing is that it gives one of the most accurate measurements of body fat.
It should be noted that the real advantage to hydrostatic weighing is that it gives one of the most accurate measurements of body fat.
What is Hydrostatic weighing,?Hydrostatic weighing can be regarded as underwater weighing which is very good and accurate ways to measure body fat.
Therefore, option B is correct.
Learn more about Hydrostatic weighing at;
https://brainly.com/question/2189911
A dog is chasing a cat towards a tree. The cat has a 10-meter lead and runs at a speed of 6 meters per second. The dog runs at a speed of 8 meters per second. The tree is 30 meters away from the dog’s starting position. Which animal will reach the tree first
Answer:
mnnnnnbmbmmmmnnmmmmmmnnnnnnmmm.mm nooooo
Explanation:
awer some folom myy thans for dog
Which Type of relationship is this ?
Answer:
Indirect relationship
Express the number in scientific notation: -8,675,300.0
Answer:
It would be -8.6753 x 10 to the 6th power
Explanation
