Answer:
In part (a)
Explanation:
Work done when climbed upstairs is explained in terms of change in potential energy.
Work=Δ(Mass.gravity.height) or W=m.g.h
Mass and gravity are constant during motion but height differs in part a from part b. The speed of climbing doesn't affect the value of work.
Height (in terms of the number of stairs) in part a is 40 stairs more than in part b.
The functional unit of the kidney is the ________?
Answer:
nephron
Explanation:
I can't really explain this one.
Answer:
nephron
Explanation:
thats what it is
If Earth was with no tilt, would we still have seasons at all? If so, how would they be different?
Answer:
If earth had no tilt, we would have no seasons.
Explanation:
As stated in the answer, if the earth had no tilt we wouldn't have seasons. The earth all around the globe would maintain the same temperature,
And due to the no tilt it would also change our orbit to a bit larger slant, in January when we are at our closest to the sun we WOULD have a mini summer. For the North and South Pole, they would remain cold.
Which triangle side lengths form a right triangle? Choose all that apply.
A. 5,6,7
B. 6,8,14
C. 8,15,17
D. 10,12,15
E. 15,20,25
F. 16,18,20
A light beam approaches a plain mirror at an incident angle of 39
degrees. What is the angle of reflection?
the upper body primal movement patterns are
Answer:
Bend to extend. Bending with a hips back movement, back straight, feet flat and forward. ...
Squat. This is a hips down motion. ...
Lunge. This is a long, linear stride, lowering your back knee to just above the ground, with a completely upright torso. ...
Rotate. ...
Push. ...
Pull. ...
Gait.
Can someone please help me with this?
Answer:
the answer is A.
Answer:
The Answer Is B.
It's Hard To Explain You Just Have To Trust Me
Explanation:
If It's Correct (Which i am certain that it is) can you plz award me with Brainliest
Microwave,radio signal,light,earthquake which does not belong
Answer:
earthquake does not belong to electromagnetic waves
What is TRUE with regard to Bronfenbrenner's social ecological model applied to the context of relationships?
Answer:The affects of proximal factors on a relationship are affected by distal factors
Explanation:
which of the following describes glass?
A. a material that has a low resistance and allows charges to move freely
B. a material that has a high resistance and prevents charges from moving freely
C. a material that has a low resistance and prevents charges from moving freely
D. a material that has a high resistance and allows charges to move freely
Answer:b
Explanation:
Work is the product of force and an object's
A. time
B. momentum
C. displacement
D. space
Answer:
C. displacement
Explanation:
Work is the product of force and an object's displacement. The correct answer is displacement and the correct option is option (C).
The result of a force and an object's displacement is called work. Work (W) is represented mathematically by the equation:
W = F × d
In the International System of Units (SI), the unit of work is the joule (J). When a force is applied to an object and it moves over a predetermined distance in the force's direction, work has been done.
No work is done if the item stays still or if the force and displacement are parallel to one another.
Therefore, Work is the product of force and an object's displacement and the correct option is option (C).
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A tennis ball and a solid steel ball of the same diameter are dropped at the same time. Which ball has the greater amount of force acting on it?
The steel one.
The steel one has more force due to the weight and mass.
An object's mass is a crucial indicator of how much stuff it contains. The gravitational pull of an object is measured by its weight. It is influenced by the object's location in addition to its mass. As a result, weight is a measurement of force.
What ball has the greater amount of force acting on it?The heavier (denser) object will fall quicker if two identically sized but made of different materials objects are present. This is because both objects will experience the same drag and buoyancy forces, but the heavier object will experience a stronger gravitational pull.
Things fall to the earth faster as a result of gravity. Acceleration is a modification of velocity, and velocity is a measurement of the direction and speed of motion. The longer an object is in free fall, the faster gravity makes it tumble toward the ground.
Therefore, solid steel ball have high mass and greater amount of force acting on it.
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What is the net force acting on a .15 kg hockey puck accelerating at a rate of 12 m/s2
Answer:
The net force is 1.8N
Explanation:
Given that the formula for force is Force = mass×acceleration. So you have to substitute the values into the formula :
[tex]force = mass \times acceleration[/tex]
Let mass = 0.15kg,
Let acceleration = 12m/s²,
[tex]force = 0.15 \times 12[/tex]
[tex]force = 1.8[/tex]
Answer:
1.8 Newtons
Explanation:
We want to figure out the net force acting on a 0.15 kg hockey puck that has an acceleration of 12 m/s². To solve this, we must apply Newton's Second Law of Motion which is denoted by the formula: f = ma.
Here, f is the force, m is the mass, and a is the acceleration. Plug our given values in to find f:
f = ma
f = (0.15 kg) * (12 m/s²) = 1.8 Newtons
Thus, the answer is 1.8 N.
~ an aesthetics lover
An object has an acceleration of 18.0 m/s/s. If the net force was doubled and the mass were tripled then the new acceleration would be
Answer:
12.0 m/s²
Explanation:
Newton's second law:
F = ma
Solving for acceleration:
a = F/m
If force is doubled and mass is tripled:
a' = (2F)/(3m)
a' = ⅔ (F/m)
a' = ⅔ (18.0 m/s²)
a' = 12.0 m/s²
The new value of acceleration of object is 12 m/s².
Given data:
The magnitude of acceleration of object is, [tex]a =18 \;\rm m/s^{2}[/tex].
Let F be initial net force and m be the initial mass. Then as per the problem, the new values of each are,
F' = 2F
m' = 3m
Apply the Newton's Second law, which says that the product of mass and acceleration of object given net force. Then,
F = ma
F = m(18)
F/m = 18 .................................................(1)
Now, for new value of net force,
F' = m'a'
2F = (3m) a'
2F/3m = a'
a' =2/3× (18) (From equation 1)
a' = 12 m/s²
Thus, we can conclude that the new value of acceleration of object is 12 m/s².
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Which image illustrates the bending of a wave around the edge of an
obstacle?
Answer:
Explanation:
It’s C
Television satellites use infrared waves to transmit. true or false
Answer: false
Explanation: Because Television satellites use microwaves waves to transmit.
Television satellites don't use infrared waves to transmit.
Which of the following provides the best summary of the process of natural
selection?
A. Population sizes increase with every generation.
B. Individuals pass on their best traits to their offspring.
C. Mutations help an individual survive and reproduce.
D. Well-adapted individuals survive and reproduce.
Answer:
B. Individuals pass on their best traits to their offspring.
Explanation:
because genes are always passed from parents to offspring.
The best summary of the process of natural selection is Individuals pass on their best traits to their offspring. Hence, the correct option is B.
What is the theory of Natural selection?The theory of natural selection gives the mechanism of evolution. It defines the method of different survival and reproduction of individuals due to differences in phenotype.
The theory of natural selection was proposed by Charles Darwin as a way of adaptation and speciation. The variations occur in organisms by random mutations occurring in the genome of individual organisms and this change in mutations may inherit in offspring.
Organisms that are more adapted to the environment are more likely to survive and pass on the genes to future generations. This process cause changes to the generations and diverged over time.
The organisms produce more offspring that are able to survive in the environment. The four factors of natural selection are Variations, Inheritance, Selection, and time.
Thus, the best summary of the process of natural selection is individuals pass on their best traits to their offspring. Hence, the ideal solution is option B.
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A few Physics questions regarding circuits and electricity.
Answer:
7.series
Explanation:
in parallel is like if one bulb stops work all the others will stop too
in series it remains constant or it wont change throughout a series circuit
a force of 20 N acted on a ball thereby imparting an impulse of 70 Ns to the ball. For how long did the force act on the ball?
Answer:3.5 seconds
Explanation:
In a nuclear reaction, which of the following must be conserved?
A. the number of neutrons
B. the count of nucleons
C. charge
D. the number of electrons
Answer:
c
Explanation:
Answer:
c
Explanation:
Science question!! Please help
Answer:
It lasted two hours or 120 minutes, it would be smart to say that he was riding up it during the interval 20-60min and riding down it during the interval 60-80min. This is an assumption made because of his speed, when going up a hill our speed is slower while when riding down it, you gain a lot of speed.
An ohmmeter is a common device for measuring resistance. Using an ohmmeter, you find that a certain material has a very high resistance. This material is most likely what?
conductor
insulator
semiconductor
superconductor
Answer:
An insulator
Explanation:
Insulators have a very high resistance because the electrons of the insulator are bounded strongly with the nucleus. Hence it requires more voltage to move an electron from the valence band to the conduction band.
21. An electric lamp is marked 2 points
240V, 60W. What is its
resistance (?) when it is
operated at the correct
voltage?
O A. 1/960
O B. 1/4
O 0.4
O D. 960
Answer:
The resistance of the lamp is 960 ohms.
Explanation:
We have,
Voltage of electric lamp is 240 V and power is 60 W.
It is required to find the resistance of the lamp.
The power of an electrical device is given by :
[tex]P=\dfrac{V^2}{R}[/tex]
R is resistance
[tex]R=\dfrac{V^2}{P}\\\\R=\dfrac{(240)^2}{60}\\\\R=960\ \Omega[/tex]
So, the resistance of the lamp is 960 ohms.
Identify the magnetic north pole of Earth’s magnet?
Answer:
using magnets
Explanation:
If we hang a magnet with a rope to an object the north pole of the magnet will point to the Earth's north pole
What are the two ways to create plasma?
Answer:
Plasma can be artificially generated by heating a neutral gas or subjecting it to a strong electromagnetic field to the point where an ionized gaseous substance becomes increasingly electrically conductive.
Answer:
By heating a natural gas
Explanation:
Empty spaces are referred to as
Answer:
An unoccupied area or volume. The empty space at the sides of the page is called the "margin". ... Atoms are 99.999999999999% empty space.
Explanation:
Answer:
A vacuum.
Explanation:
A vacuum has an empty space and is used in Science.
Convection currents not only in the Earth's core but in what?
A. Only liquids
B. When a dense substance is warmer than a less dense substance
C. In both liquids and gases
D. Weakly in solids
Answer:
B. When a dense substance is warmer than a less dense substance
Explanation:
How much current must be applied across a 60 Ω light bulb filament in order for it to consume 55 W of power? Unserious answers will be deleted, and reported. (Please show some work)
Answer: current I = 0.96 Ampere
Explanation:
Given that the
Resistance R = 60 Ω
Power = 55 W
Power is the product of current and voltage. That is
P = IV ...... (1)
But voltage V = IR. From ohms law.
Substitutes V in equation (1) power is now
P = I^2R
Substitute the above parameters into the formula to get current I
55 = 60 × I^2
Make I^2 the subject of formula
I^2 = 55/60
I^2 = 0.92
I = sqr(0.92)
I = 0.957 A
Therefore, 0.96 A current must be applied.
75 points!
In a particular chemical reaction, the energy of the reactants is 30 kJ and the energy of the products is 5 kJ. The maximum energy of the system is 40 kJ.
A. Sketch a potential energy diagram for this reaction. Make sure to label the energy of the reactants, the energy of the products, the activation energy, and the enthalpy change for the reaction.
B. What is the activation energy for this reaction?
C. What is the enthalpy change for this reaction?
D. Is this reaction endothermic or exothermic? Explain your answer in two ways: first, using the energy values, and second, by referring to the shape of the graph.
Answer:
The activation energy of a chemical reaction is the energy require to form the activated complex and the activated complex then converted to product. The activation energy is always positive for both endothermic and exothermic reactions.
Explanation:
pls if im worng add a star pls
Determine What is the efficiency of a machine whose work output is 4 joules, and whose work input is 10 joules?
Answer:
The efficiency of the machine is 40 %.
Explanation:
We have,
Output work by the machine is 4 joules and the input work is 10 joules.
It is required to find the efficiency of a machine. The efficiency of a machine is given by the ratio of output work to the input work. It is given as :
[tex]\eta=\dfrac{4}{10}\times 100\\\\\eta=40\%[/tex]
So, the efficiency of the machine is 40 %.
This graph provides data on the amount of water needed to grow four different crops, each used to produce ethanol, a fuel. For each crop, the data shows how many liters of water are needed to produce one liter of ethanol fuel. Which of the following would require using the most water? *
Producing 100 L of ethanol from sugar cane
Producing 200 L of ethanol from sugar beet
Producing 300 L of ethanol from potatoes
Producing 400 L of ethanol from corn
Answer:
Producing 300 L of ethanol from potatoes
Explanation:
From the diagram, one liter of ethanol production from sugar cane requires 2000 liters of water. Hence, in order to produce 100 L of ethanol from sugar cane, 2000 x 100 = 200,000 L of water.
1000 liters of water is needed to produce 1 liter of ethanol from sugar beet. Hence, 200 x 1000 = 200,000 L of water will be needed to produce 200 liters of ethanol.
1000 liters of water is also required to produce 1 liter of ethanol from potatoes, hence, 300 x 1000 = 300,000 L of water would be required to produce 300 L of ethanol from the same material
About 500 liters of water is required to produce 1 liter of ethanol from corn, hence, 400 x 500 = 200,000 L of water would be needed to produce 400 L of ethanol from corn.
In conclusion, producing 300 L of ethanol from potatoes would require using the most water among all the options.