If you walked into the building with your cup of coffee at 8:00 in the morning, took a ride up and down on the elevator for fun, and then went home, then ...
When you got to the top:
... Your distance covered = 50 meters
... Your displacement since you started = 50 meters up
When you returned to the bottom:
... Your total distance covered = 100 meters
... Your displacement since you started = zero
Answer:
If you walked into the building with your cup of coffee at 8:00 in the morning, took a ride up and down on the elevator for fun, and then went home, then ...
When you got to the top:
... Your distance covered = 50 meters
... Your displacement since you started = 50 meters up
When you returned to the bottom:
... Your total distance covered = 100 meters
... Your displacement since you started = zero
Explanation:
A boy is pulling a box on the ground by a string to the right. What four forces he using?
Periodic waves with a wavelength of 0.50 meter move with a speed of 0.30 meter in medium A. When the waves enter medium B, they travel at 0.15 meter per second. Calculate the wavelength of the waves in medium B.
Answer:
0.25 m
Explanation:
Refraction occurs when the velocity or wavelength of a wave changes at the interface between two media.
We know that refractive index=
Wavelength in medium A/wavelength in medium B = velocity in medium A/velocity in medium B
Let the wavelength of medium B be a
0.5/a = 0.3/0.15
0.5 × 0.15 = 0.3 × a
a= 0.5 × 0.15/0.3
a= 0.25 m
can a plane mirror firm a real image ? if yes tell me how ?
Answer:
Explanation:
A plane mirror will produce a virtual image of a real object. But it is correct that a plane mirror will also produce a real image of a virtual object.A virtual image An image in a mirror is a virtual object, which can in turn be used to create another image. This can occur when you have more than one optical element in the optical system. Then the object of one component becomes the image of the next optical component.
So the answer is Yes it will!!!!
Answer:
I think u know the answer of this question
Please help, quicklyyyyy
While riding her bike, Ms. Parker average a velocity of 20m/s. If she maintains that velocity for a time of 20 seconds, how far does she rides?
Answer:
400 m
Explanation:
20m/s x 20s = 400m
Witch of these units is NOT used to measure speed? m/s, km/h, mph, km
Answer:
km
Explanation:
Answer:
Km
Explanation:
Speed is measured is distance traveled/time
Which statement best defines the resistance of an electric circuit? (1 point) o It limits the amount of electrical energy that can pass through a circuit. 0 It is the measurement of the rate of electrical energy in a circuit. O It is the amount of electrical energy that is available in a circuit. O It describes how much electrical energy passes in a circuit.
Answer:
it limits the amount of electrical energy that can pass through a circuit
Scenario: The light bulb from the projector went out and the teacher was in the hallway. One student begins pressing buttons on the projector to fix it.
Questions to answer:
1. Was consent given (yes, no, unsure)?
2. What evidence do you have to prove your way of thinking?
3. How can you change the scenario to show that consent was given?
Answer:
1:No
2:The teacher was in the hall so how would the child ask?
3: The child could have went into the hallway and asked the teacher if they could try and fix it.
Explanation:
Sorry if that isn't what your asking!
</3 PureBeauty
Answer:
During lunch your friend asked you to come over after school, so you get on their bus to go home.
Questions to answer:
1. Was consent given (yes, no, unsure)?
2. What evidence do you have to prove your way of thinking?
3. How can you change the scenario to show that consent was given?
Explanation:1:No2:The teacher was in the hall so how would the child ask?3: The child could have gone into the hallway and asked the teacher if they could try and fix it.
A total charge of 7.5 mC passes through a cross-sectional area of a wire in 0.9 s. What is the current in the wire
Answer:
the current in the wire is 0.008333333 A
Explanation:
The computation of the current in the wire is as follows;
Current in the wire is
= Total charge ÷ cross sectional area of the wire
= 7.5 × 10^-3C ÷ 0.9s
= 0.008333333 A
Hence, the current in the wire is 0.008333333 A
We simply applied the above formula so that the correct current of the wire could come
And, the same is considerd and relevant too
Can a molecule of DNA contain 60% thymine? Why
or why not?
Answer:
The possibility of Adenine=40% and Thymine=60% is only in single stranded DNA molecule. In the question, the DNA sample referred is a single stranded DNA. If guanine=10% as guanine will always pair with cytosine, i.e.cytosine is also 10% then adenine and thymine accounts 80% as adenine will always pair with thymine.
A molecule of DNA cannot contain 60% thymine because this amount will surpass 100% in consideration of its complementary base.
DNA:DNA or deoxyribonucleic acid is a biological molecule that stores genetic information in living cells.
DNA is a double stranded molecule that consists of nucleotide bases as follows:
AdenineThymine GuanineCytosineAccording to Chargaff in his rule, the amount of adenine & thymine and guanine & cytosine in a DNA molecule is the same, which must equal 100% overall.
Therefore, if thymine is 60% in the DNA, adenine will also be 60%, which in total has already surpassed 100% without adding the other two bases.
Learn more about DNA at: https://brainly.com/question/1822938
A 1.0 kg ball is thrown into the air with an initial velocity of 30 m/s. What is the kinetic energy of the ball?
Answer:
If this helps, to work out the kinetic energy the formula is K (stands for kinetic energy) = 1/2 (half of) mass and velocity. So the answer is 450 joules.
Explanation:
When your body takes in food, what type of energy does it get from the food?
Answer: Chemical Energy
Explanation:
Glucose and other food molecules are broken down by controlled stepwise oxidation to provide chemical energy in the form of ATP and NADH.
Comparing the reactants and the products of a chemical reaction, which observation can best be used to argue that the reaction is endothermic?(1 point)
The volume of the reactants is greater than the volume of the products.
The total energy of the reactants is equal to the total energy of the products.
There are fewer chemical bonds in the reactants than there are chemical bonds in the products.
The temperature of the reactants is greater than the temperature of the products.
Answer:
D) The temperature of the reactants is greater than the temperature of the products.
Explanation:
All the answers:
1. A) The reactants are unlit charcoal, and the products are charcoal that has already burned and released its energy
2. C) sugar + oxygen → carbon dioxide + water + energy
3. D) iron + oxygen → rusted iron + energy
4. A) an endothermic reaction, because ice absorbs heat to become liquid water
5. D) The temperature of the reactants is greater than the temperature of the products.
We can argue that a reaction is endothermic when the temperature of the reactants is greater than the temperature of the products.
What is an endothermic reaction?An endothermic reaction is a chemical reaction accompanied by the absorption of heat.
Comparing the reactants and the products of a chemical reaction, which observation can best be used to argue that the reaction is endothermic?
The volume of the reactants is greater than the volume of the products. False. There is no relation between the volume and the endothermicity.The total energy of the reactants is equal to the total energy of the products. False. If the total energy is equal, there is no heat (energy) absorption.There are fewer chemical bonds in the reactants than there are chemical bonds in the products. False. We must consider not only the number of bonds, but also their energies, to establish if a reaction is endothermic.The temperature of the reactants is greater than the temperature of the products. True. If the reaction is endothermic and absorbs heat from the surroundings, the temperature of the reactants will be greater than the temperature of the products.We can argue that a reaction is endothermic when the temperature of the reactants is greater than the temperature of the products.
Learn more about endothermic reactions here: https://brainly.com/question/1995950
Bob who has a mass of 100 kg stands ona. Frictionless frozen lake with a 20 kg rock in his hands. He throws the rock forward with a velocity of +5 m/s. What is the velocity of bob after he throws the rock
A. -2 m/s
B. -1 m/s
C. 0 m/s
D. 1 m/s
Answer:
Option B
Explanation:
This involves the conservation of momentum:
m1v1 = m2v2
Now initially neither the rock nor Bob is moving. Then the rock moves forward with a velocity of 5 m/s, having a mass of 20 kg. But Bob moves back by the conservation of momentum, so at what velocity?
0 = 20(5) + 100(vf),
-100 = 100vf,
vf = - 1m/s
A skier is moving at a constant velocity for 20 seconds when he hits a downhill slope of 60 meters and begins to accelerate at 6 m/s^2 for 6 seconds. At the bottom of the hill he begins to stop over 10 seconds
a. What was the skiers constant velocity before going down hill?
b. What was the skier’s acceleration as he comes to a stop?
c. What was the skier’s total distance over the 36 seconds?
d. What was the skier’s average speed during the 36 seconds?
help me please!!!!!..............
Answer:
The car took 3 hours to travel 180 miles
Explanation:
Constant Speed Motion
An object travels at constant speed if the ratio of the distance traveled by the time taken is constant.
Expressed in a simple equation, we have:
[tex]\displaystyle v=\frac{d}{t}[/tex]
Where
v = Speed of the object
d = Distance traveled
t = Time taken to travel d.
From the equation above, we can solve for t:
[tex]\displaystyle t=\frac{d}{v}[/tex]
The car travels at v=60 mi/h for a distance of d=180 miles. The time taken is:
[tex]\displaystyle t=\frac{180\ mi}{60\ mi/h}[/tex]
t = 3 hours
The car took 3 hours to travel 180 miles
You are riding a skateboard and hit a hole in the street, causing you to fly off the board and crash. Which law represents this action? *
Answer:
Newton's first law of motion states that an object at rest will remain at rest and an object in motion will remain in motion unless it is acted on by an unbalanced force. Using unbalanced forces to control the motion of a skateboard demonstrates Newton's first law of motion.
Hope it helps
Answer:
Good question! It's the law of motion.
Explanation:
The answers plz....................
Answer:
The answer would be D
Explanation:
It's quite simple, the Universal Law of Gravitation states that all mass no matter the size, shape, or weight acts equally upon the force of gravity of the gravitational object. Basically, between all sizes, shapes, weights of masses, gravity applies the same gravitational force with all. Gravity with friction would be something else, which is also states in the Theory of Gravitation.
Why is the solar system commonly represented as a scale model?
Please write in complete sentences. I will mark Brainiest to whoever correct.
Someone please help me
What is an isotope? (2 points)
Group of answer choices
Atoms of different elements that have different numbers of neutrons
Atoms of different elements that have different numbers of protons
Atoms of the same element that have different numbers of neutrons
Atoms of the same element that have different numbers of protons
Answer:
The answer is C.) Atoms of the same element that have different numbers of neutrons.
Explanation:
I know this is right because i took the test!
Calculate the magnitude and direction of a vector whose x and y components are given
to be 30 and 40 units respectively.
Answer:
Magnitude = 50 units
Direction = 53.13°
Explanation:
The formula to find out the magnitude of a resultant vector with the help of its x and y components is given as follows:
[tex]Magnitude = \sqrt{x^{2} + y^{2}}\\\\[/tex]
where,
x = 30 units
y = 40 units
Therefore,
[tex]Magnitude = \sqrt{(30 unit)^{2} + (40\ unit)^{2}}\\\\[/tex]
Magnitude = 50 units
Now, the direction of the resultant vector will be given by the following formula:
[tex]Direction = tan^{-1}\frac{y}{x}\\\\Direction = tan^{-1}\frac{40}{30}[/tex]
Direction = 53.13°
What type of device is a refrigerator?
A. A heat pump that uses work to move heat
B. A heat pump that uses heat to do work
C. A heat engine that uses work to move heat
D. A heat engine that uses heat to do work
when a person holds a ball above earth's surface, where is this potential energy stored?
Answer:
in the ball
Explanation:
potential energy is where an object has energy, always, but it isn't always moving, and when you drop the ball, it has kinetic energy.
Please help!!!! Will mark brainliest.
Spiderman, on a strand of web, accelerates upward at 1.3 m/s2. If spiderman has a mass of 76 kg,
what is the force in the strand of webbing?
Answer:
Approximately [tex]8.4 \times 10^{2}\; \rm N[/tex], assuming that [tex]g = 9.8\; \rm m \cdot s^{-2}[/tex].
Explanation:
Let [tex]m[/tex] and [tex]a[/tex] denote the mass and acceleration of Spiderman, respectively.
There are two forces on Spiderman:
Downward gravitational attraction from the earth: [tex]W = m \cdot g[/tex].Upward tension force from the strand of web [tex]F(\text{tension})[/tex].The directions of these two forces are exactly opposite of one another. Besides, because Spiderman is accelerating upwards, the magnitude of [tex]F(\text{tension})[/tex] (which points upwards) should be greater than that of [tex]W[/tex] (which points downwards towards the ground.)
Subtract the smaller force from the larger one to find the net force on Spiderman:
[tex](\text{Net Force}) = F(\text{tension}) - W[/tex].
On the other hand, apply Newton's Second Law of motion to find the value of the net force on Spiderman:
[tex](\text{Net Force}) = m \cdot a[/tex].
Combine these two equations to get:
[tex]m \cdot a = (\text{Net Force}) = F(\text{tension}) - W[/tex].
Therefore:
[tex]\begin{aligned}& F(\text{tension})\\ &= m \cdot a + W \\ &= m \cdot (a + g)\\ &= 76\; \rm kg \times \left(1.3\; \rm m \cdot s^{-2} + 9.8\; \rm m \cdot s^{-2}\right)\\ &\approx 8.4\times 10^{2}\; \rm N\end{aligned}[/tex].
By Newton's Third Law of motion, Spiderman would exert a force of the same size on the strand of web. Hence, the size of the force in the strand of the web should be approximately [tex]8.4\times 10^{2}\; \rm N[/tex] (downwards.)
11. Which has the greater acceleration: a car that increases its speed from 50 km/h to 60 km/h, or a bike that
goes from 0 km/h to 10 km/h in the same time? Explain.
Answer:
they are the same
Explanation:
change in speed is 10km/h for both, and the time is the same for both. they have the same acceleration.
When is the world going to end? Give me your opinions and the reasons why you think that.
Answer:
probably when the next pandemic happens
Katrina pushes off a flat sidewalk on her new skateboard.
What causes her to move?
O A. The force of her push overcomes the forces of gravity and friction
OB. The force of gravity overcomes the forces of her push and friction
o C. The force of friction overcomes the normal force of the skateboard and the force of gravity.
o D. The normal force of the skateboard overcomes the force of her push and the force of gravity
Answer:
The force of her push overcomes the forces of gravity
Explanation:
The force of her push overcomes the forces of gravity and friction. The correct option is A.
What is friction?Friction is basically the force that restricts solid surfaces, fluid layers, and material elements from sliding against each other.
There are various kinds of friction: Dry friction is the force that opposes the relative lateral motion of two in contact solid surfaces.
Friction is defined as the force that opposes the movement of one solid object over another. Friction is classified into four types: static friction, sliding friction, rolling friction, and fluid friction.
Gravity causes objects to accelerate as they fall to the ground. Acceleration is a change in velocity, which is a measurement of the speed and direction of motion.
Katrina pushes her new skateboard off a flat sidewalk. Her push overcomes the forces of gravity and friction.
Thus, the correct option is A.
For more details regarding friction, visit:
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the spot directly above the focus on the surface of the earth
Answer:
EpicenterExplanation:
-The hypocenter is the point within the earth where an earthquake rupture starts. The epicenter is the point directly above it at the surface of the Earth. Also commonly termed the focus.
-The location below the earth's surface where the earthquake starts is called the hypocenter, and the location directly above it on the surface of the earth is called the epicenter. Sometimes an earthquake has foreshocks.
WILL REWARD ASAP Calculate the density of a 25g stone that causes water in a graduated cylinder to
go up by 12.5 ml.
What happens when you call someone using your cell phone?
A. Microwaves travel from your cell phone directly to the cell phone
of the person you are calling.
B. Microwaves reach a cell tower, then fiber optic cables send the
signal to a cell tower near the person you are calling.
C. A system of satellites orbiting Earth receives the microwave
signals and sends them to the person you are calling.
D. Sound waves reach a cell tower, then fiber optic cables send the
signal to a cell tower near the person you are calling.
Answer: B, Microwaves reach a cell tower, then fiber optic cables send the signal to a cell tower near the person you are calling.
Explanation:
Answer:D. Sound waves reach a cell tower, then fiber optic cables send the
signal to a cell tower near the person you are calling.
Explanation: just got it right