Answer:
R = K L / A resistance proportional to length and inversely proportional
to area
R2 / R1 = A1 / A2 = A1 / (4 A1) = 1 / 4
R2 = R1! / 4
A train is running at a speed of 60 m/s . what will this speed be in km/h ?
Speed in m/s=60m/s
Speed in km/h
[tex]\\ \sf\longmapsto 60\times \dfrac{5}{18}[/tex]
[tex]\\ \sf\longmapsto \dfrac{300}{18}[/tex]
[tex]\\ \sf\longmapsto 16.6km/h[/tex]
PLEASE ANSWER NEED HELP!!!!!!!! PLEASE THE CORRECT ANSWER!!!!!!
Tonya has been working a lot and has not been able to maintain healthy habits, like diet and exercise, as well as she normally does. This has meant a lot of late nights and eating take-out instead of preparing meals herself. What is the likely result of this change in behavior?
A.
She is at high risk for obesity.
B.
She will probably gain a little weight.
C.
If she is young, there will be no impact.
D.
If she is exercising at all, the effects will be minimal.
PLEASE NO LINKS
Tonya has been working a lot and if she is not able to maintain her healthy then she will probably gain a little weight. Hence, option B is correct.
What is Diet?Diet, in the context of nutrition, refers to the items that a person frequently eats and drinks (or a group). A regulated diet, or one that satisfies a person's physical needs, may be used during a specific illness therapy or health condition management.
For instance, a diabetic's diet may be limited to a variety of foods and beverages that help control blood sugar levels. Numerous fiber, non-starchy fruits, and vegetables are included in the diet suggested for diabetic patients. Because starchy foods are high in carbohydrates, eating a lot of them could raise your blood sugar levels.
If Tonya has been working a lot and is not able to maintain healthy habits as she normally does then she will gain some weight. But she must make sure to start a healthy lifestyle as soon as possible because in a long run this habit can affect her health very badly.
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Suppose that you push on a heavy desk, but it does not move. What force opposes your push? How do you know that the opposing force balances the focus that you excerpt? (section 3 friction a force that opposes motion standard standards)
Answer:
friction doesn't let the desk move.
Explanation:
the law of motion states any object in motion should stay in motion.
Amelia is writing an explanation of the difference between potential and kinetic
energy. Which of the following would be an example Amelia could use to represent
potential energy?
O A swing moving back and forth
O A soccer ball sitting on top of a hill
O A hot air balloon rising slowly
O A car traveling down the road
A soccer ball sitting on top of a hill.
Kinetic energy is energy that possesses due to its motion. Basically, a moving object has kinetic energy.
Potential energy is the energy held by an object due to its position relative to other object. Which means it has the possibility (potential) to become kinetic energy, but at that moment where it’s not moving, it’s potential energy.
What is the speed of a jet plane that travels 3000 meters in 10 seconds?
Answer:
300 m/s
Explanation:
Name Jenner
Projectile Motion Test
Brad kicked a soccer ball as hard as he could. The ball landed
40 meters away from where he kicked it. The ball was in the
air for 8 seconds.
Answer:
so i can only help u with what u give me.i think this is a math problem so the answer would be....the ball traveled 5 meters per sec
Please help if you can!
Answer:
Illuminated
Explanation:
I think but not sure
if 770 grams of metal requires 155 calories of energy to raise its temperature by 10 kelvin what is its specific heat
The specific heat capacity of the metal of mass 770 g which required 155 calories to raise its temperature by 10 kelvin is 0.02 Cal/gK
From the question given above, the following the following data were:
Mass of metal (M) = 770 g
Heat (Q) required = 155 calories
Change in temperature (ΔT) = 10 K
Specific heat capacity (C) =?The specific heat capacity of metal can be obtained as illustrated below:
Q = MCΔT155 = 770 × C × 10
155 = 7700 × C
Divide both side by 7700
C = 155 / 7700
C = 0.02 Cal/gKTherefore, the specific heat capacity of metal is 0.02 Cal/gK
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what makes something magnetic?
Is vaping bad for u?
Random
Answer:
yes
Explanation:
it damages your lungs
Answer:
yes it can mess you lungs up real bad
Whats three things that determine the amount of potential energy
Referring to the diagram in Sample Problem 2.8, determine the speed at points C and D.
What type of energy does the horse have because of its motion?
A. Elastic
B. Kinetic
ООО
C. Gravitational
D. Potential
is the horse running/moving? if so then kinetic i believe
Lichens are not single organisms, but algae and fungi that function together. The algae use photosynthesis to make food for both organisms. The fungi produce digestive chemicals and absorb nutrients for both organisms.
How does the biological activity of lichens cause weathering in rocks?
Answer options with 4 options
A.
Lichens cause friction as they grow, which weathers the rocks.
B.
Lichens produce chemicals, which dissolve and weather the rocks.
C.
Lichens take in water, which freezes in cracks and weathers the rocks.
D.
Lichens absorb heat during photosynthesis, which weathers the rocks.
Answer please
Answer:
The correct answer is B
Lichens produce chemicals which dissolve and weather the rocks.
The main source of energy for living things on earth is what?
block a of mass 4m is attached by a light string to block b of mass 2m. the string passes over a pulley with negligible friction and of negligible mass. block a is held a distance h above the ground, as shown. the blocks are released from rest, and block a reaches the ground two seconds later. the value of h is most nearly
The kinematics and Newton's second law allow us to find the height from which the block system descends is:
y = 6.54 m
Given parameters
Body mass m1 = 4 kg The mass of the body on the ground m² = 2 kg The descent time t = 2sTo find
Body height
Newton's second law gives a relationship between the net force, the mass, and the acceleration of the body.
∑ F = m a
Where the bold letters indicate vectors, F is the force, m the mass and the acceleration of the body.
Kinematics studies the movement of bodies, looking for relationships between position, velocity and acceleration
y = v₀ t + ½ a t²
In the attached we have a free body diagram of the system, let's write Newton's second law.
T - W₁ = m₁ a
-T + W₂ = m₂ a
Let's solve the system of equations.
W₂ - W₁ = (m₁ + m₂) a
a = [tex]\frac{m_2-m_1}{m_2+m_1} \ g[/tex]
Let's calculate
a = [tex]\frac{2 -4}{ 2 +4} \ 9.8[/tex]
a = -3.27 m / s²
The negative sign indicates that the heaviest body is descending.
Now we can use kinematics to find the height, as the system comes out of rest the initial velocity is zero, when he reaches the ground his height is zero.
y = y₀ + v₀ t + ½ a t²
0= y₀ + 0 +½ a t²
Let's calculate
y₀ = ½ 3.27 2²
y = 6.54 m
In conclusion, using kinematics and Newton's second law we can find the height from which the block system descends is:
y = 6.54 m
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A 1000 kg race car rounds a curve with a radius of 50 m.
Find the magnitude of the centripetal force acting on the car
when it rounds the curve at 15 m/s.
Answer:
5644556677888777766554433
what are 10 main things that make up out observable universe
Answer:
Spaghetti.
Explanation:
Which kind of boundary is caused by unequal density of the tectonic
plates? *
5 points
What is it ?
Answer:
Convergent plate boundaries
Explanation:
if they are of unequal density, One plate usually sinks beneath the other in a subduction zone.
explain how cold water masses form
A 1.8 kg book has been dropped from the top of the football stadium. Its speed is 4.8 m/s when it is 2.9 meters above the ground?
Answer:
71.89 Joules.
Explanation:
The method of measuring distance in space using parallax is equivalent to surveyors on Earth doing _______________. The smaller the parallax of an object, the greater its __________. When we measure parallax, the distance between the two observers (or two vantage points) is called the ___________. The first parallax to a star was not measured until 1838 because the stars are so _______________. The distance at which a star has a parallax of one second of arc is called a __________. In 1989, astronomers launched a satellite called __________ to measure parallax even better from outer space.
Answer:
Triangulation
Distance
Baseline
Far away
Parsec
Hipparcos
Astronomers are known to estimate the distance of nearby objects in space through the use of stellar parallax, or trigonometric parallax.
They often measure a star's movement using the background of more distant stars as Earth revolves around the sun.
With the use of Parallax, one can get the best way to have the distance in astronomy,
Triangulation is often used instead of parallax to know the terrestrial distances by forming triangles with a predefined base and measuring the angles formed with the other two sides.
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The soccer player is running at a speed of 4 m/s when he slides on the ground, coming to a stop in a distance of 2 m. What was his acceleration?
Water near the surface of a swimming pool is slightly warmer than the water at the bottom. The warm water rises because of ....
a. conduction
b. convection
c. radiation
d. contraction
Answer:
B. Convection
Explanation:
I hope this helped!
Answer:
convection
Explanation:
warm air rises when conevetion happens so thats the answer
8 kg cat is running with a velocity of 4 m/s. What is the cat's momentum?
Answer:
Kinetic energy = (1/2) (mass) (speed)²
Kinetic energy = (1/2) (8 kg) (4 m/s)² =
(4 kg) (16 m²/s²) =
64 (kg-m/s²) (m) = 64 newton-m = 64 joules
A cat of mass 8 kg moving with a velocity of 4 m/s, then the momentum of the cat's movement will be equal to 32 kg m/s.
What is momentum?The momentum is the result of a particle's velocity and its mass. Force and motion, meaning it has both magnitude and the direction. According to Isaac Newton's second equation of motion, the force acting on a particle equals the time rate of increase of momentum.
The impulse, which is the product of the force and the intervals (the impulse), is equal to the difference in momentum, according to Newton's 2nd law, if a steady force operates on a particle for a specific amount of time. On the other hand, a particle's momentum is the amount of time needed for a consistent action to fight it to rest.
As per the data provided in the question,
Mass of the cat, m = 8 kg
Velocity of the cat, v = 4 m/s.
[tex]Momentum(p) = Mass(m)*velocity(v)[/tex]
p = (8 kg) × (4 m/s)
p = 32 kg m/s.
Therefore, the momentum of the cat is 32 kg m/s.
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please help me I don’t understand
Answer:
A and B are false.
C and D are plausible. I would bet on D.
OIOIOIOIOI
Is it possible to be in 2 places at once??!?!?!??!?!??!?!?!?
PLZ HELP PLZZZZZZZZZZZZZ
Answer:
No
Explanation:
NO
Answer:
ok i don't think you could but if you were cut in half you could soo I say yes you could
Explanation:
describe the appearance of the substance before the phase change?
Answer:when matter changes to from one state (solid, liquid, gas, plasma) to another
Explanation:
Question 1
Analyze this: A rightward force of 80 N is applied to a 5.00 kg object to accelerate it to the right. The friction force
between the object and the surface is 30 N. Complete the diagram
The only part of the diagram that remains is the force that moves the object forward which is 50 N.
We know that the net force is obtained using the relation;
Net force = -Frictional force + Rightward force
The frictional force is negative because its direction is opposite to that of the forward force.
We have the following information from the question;
Frictional force = 30 N
Rightward force = 80 N
Mass = 5.00 kg
Net force is obtained from;
5a = 80 - 30
5a = 50
a = 10 m/s^2
Net force = 50 N, This the force that moves the object forward.
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We are able to understand body weight and usually start wanting to "grow up" at 10 years old. OA. True ОВ. False
Answer:
true
Explanation:
for some I different some start at 9
