Answer:
Continental drift describes one of the earliest ways geologists thought continents moved over time. Today, the theory of continental drift has been replaced by the science of plate tectonics.
The theory of continental drift is most associated with the scientist Alfred Wegener. In the early 20th century, Wegener published a paper explaining his theory that the continental landmasses were “drifting” across the Earth, sometimes plowing through oceans and into each other. He called this movement continental drift.
12. If the 50kg rock fell from the 20m high cliff, then what would its velocity be just before it
hits the ground?
Answer:
The velocity is 2.5 before hitting the ground
Explanation:
Mark me as brainliest
2021 edge
in 10 minutes a heart can beat 700 times at this rate in how many minutes will a heart beat 140 times at what rate can a heart beat
A dog is running at an initial speed of 10 m/s. He covers 50 m in 4 seconds. What is the acceleration of the dog?
a.
1.25 m/s2
b.
1.04 m/s2
c.
5 m/s2
d.
3.2 m/s2
EMERGENCY! PLS HELP
An isotope of Cesium-137 has a half-life of 30 years. If 6 grams of Cesium-137 decays over a period of 90 years, how many grams of Cesium would remain?
Answer:
0.75 grams
Explanation:
Today we have 6 grams
In 30 years, 3 grams remain
In 60 years 1.5 grams remain
in 90 years 0.75 grams remain
mathematically It would look like this
m = 6(0.5⁽ⁿ/³⁰⁾) where n is number of years
According to astronomers, how many galaxies are distributed across the observable universe?
A. several thousand
B. 100 billion
C. 1 trillion
D. 50
Answer:actually it's 120 billion so you can choose 100 billion
Explanation:
Answer: 1 billion
Explanation:
Over the 10 second period, how far does Juan run?
Answer:
C. 10
Explanation:
On the graph you can see that at the 10 second mark it is at the 10 meters mark as well.
Daily variations in biological and psychological processes, such as blood pressure and the secretion of hormones, are called:
A. free-running conditions.
B. REM rebound effects.
C. circadian rhythms.
D. delta brain wave activity.
How Biological Rhythms Work
How Biological Rhythms WorkDiurnal (night and day)
How Biological Rhythms WorkDiurnal (night and day)Circadian (24 hours)
How Biological Rhythms WorkDiurnal (night and day)Circadian (24 hours)Ultradian (less than 24 hours)
How Biological Rhythms WorkDiurnal (night and day)Circadian (24 hours)Ultradian (less than 24 hours)Infradian/Circalunar (1 month)
How Biological Rhythms WorkDiurnal (night and day)Circadian (24 hours)Ultradian (less than 24 hours)Infradian/Circalunar (1 month)Circannual (1 year)
HELPPPP
A man is trying to push a box across a table. He pushes on the box with 5 N and the
table provides a frictional force of 1 N. What will be the net force on the box?
1) 4 N
2) 5 N
3) 6 N
4) Not enough information has been given
Answer:
4 Newton
Explanation:
because you minus 1 Newton from 5 newton
The net force on the box is equal to 4N. Therefore, option (1) is correct.
What is the net force?The net force can be described as the vector sum of forces acting on a particle or object. The net force can be defined as a single force showing same the effect of the original forces on the particle's motion. Net force gives the same acceleration as all those actual forces together.
The net force becomes the resultant force. It has the same effect on the rotational motion as all actual forces taken together by the object. Force is a vector quantity as it has a magnitude and a direction.
In the given problem, the applied force is in the opposite direction of the frictional force so we can find the net force by subtracting these two forces.
Given, the applied force to push the box = 5N
The frictional force on the box, = 1 N
The net force on the box = 5N + (-1N) = 4N
Learn more about the net force, here:
https://brainly.com/question/18109210
#SPJ5
A car stops from a speed of 15 m/s in 3 s. How far did it go while stopping?
Answer:
5m/s
Explanation:
15m/s ÷ 3s = 5m/s
How many milliliters are in 3.2 L? (1000 mL = 1L)
Answer: 3200ml.
Please give brainliest.
Answer:
3200ml
Explanation:
[tex](3.2L)\frac{1000mL}{1L} = 3200mL[/tex]
A rocket traveling through space with a constant velocity of 10 m/s fires up a booster. The booster accelerates the rocket at a rate of 5 m/s. What distance in meters has the rocket traveled within 12 seconds after the booster is turned on?
The distance traveled by the rocket after the given time period is 480 m.
The given parameters;
velocity of the rocket, v = 10 m/sacceleration of the rocket, a = 5 m/s²time of motion of the rocket, t = 12 sThe distance traveled by the rocket after the given time period is calculated from the second kinematic equation of as shown below;
s = ut + ¹/₂at²
s = (10 x 12) + (0.5 x 5 x 12²)
s = 120 + 360
s = 480 m
Thus, the distance traveled by the rocket after the given time period is 480 m.
Learn more here:https://brainly.com/question/23243663
During which section was the person moving at the highest speed? What was their speed? Defend your answer.
Where's the person that the question is talking about?
Answer:
d was
Explanation:
Explaining How Temperature Affects the Speed of a Wave
Does sound travel faster in a warm room or a cold room?
Explain your answer
Answer:
Warm Room
Explanation:
Sound, like any wave, is a transfer of energy from one particle to another.
As temperature rises, each particle will have more energy; they will collide into other particles more often.
As the frequency of collisions increase, the speed of which the sound wave is transferred increases.
Which of the following could be evidence that an organism's growth is influenced by the organismis genes?
(Hint identical twins have identical genes. Non-identical twins have about half the same genes.)
Adog breed can be made smaller by breeding together only the smallest dogs.
Identical twins are more likely to be about the same height than non-identical twins,
Chdren are likely to have friends who are about the same height
Identical twins often have slightly different weights at birth
Answers:
A dog breed can be made smaller by breeding together only the smallest dogs.
Identical twins are more likely to be about the same height than non-identical twins,
Explanation:
A particle at the origin is experiencing three forces. The first one has a magnitude of 57 lb and is directed towards (2,-4,5), while the second one has a magnitude of 32 lb and is directed towards (-1,-2,-8). If the net force is 41 lb in the direction of (-5,-1,4), what is the x-component of the third force acting on the particle (in lb)?
The x-component of the third force acting on the particle is 41.2 lb.
The given parameters;
(2, -4, 5) = 57 lb(-1, -2, -8) = 32 lb(-5, -1, 4) = 41 lbThe vector components of the forces is calculated as;
[tex]F_1 = 57, (2,-4, 5) = 57\times \frac{2i -4j+ 5k}{\sqrt{2^2 + 4^2 + 5^2} } = 8.5(2i -4j+ 5k)\\\\F_1 = (17 i -34j + 42.5k)lb\\\\\\ F_2 = 32, (-1, -2, -8) = 32\times \frac{-i -2j-8k}{\sqrt{1^2 + 2^2 + 8^2} } = 8.3(-i-2j-8k)\\\\ F_2 = (-8.3i - 16.6j - 66.4k)lb\\\\\\ F_{net}= 41, (-5, -1, 4) = 41\times \frac{-5i -j+ 4k}{\sqrt{5^2 + 1^2 + 4^2} } = 6.5(-5i-j+ 4k)\\\\ F_{net} = (-32.5i -6.5j+ 24k)lb[/tex]
The x-component of the third force is calculated from the resultant of the forces;
[tex]F_1+F_2 + F_3 = F_{net}\\\\F_3 = F_{net} - (F_1 + F_2)\\\\F_3 = (-32.5i -6.5j + 24k) - (17i -34j + 42.5k) - (-8.3i -16.6j -66.4k)\\\\F_3 = (-32.5 -17 + 8.3)i +(-6.5 + 34+ 16.6)j + (24 -42.5+66.4)k\\\\F_3=(-41.2 i) +(44.1)j + (47.9)k\\\\F_3 = (-41.2i + 44.1 j + 47.9k)lb[/tex]
Thus, the x-component of the third force acting on the particle is 41.2 lb.
Learn more here:https://brainly.com/question/11558676
in loading a long lorry a man lifts boxes each of weight 100N and height of 1.5M.how much energy is transfered when one box is lifted
Explanation:
energy=100×1.5=150 joules
how do sound waves behave as a solid
a. they travel faster in a solid than other mediums
b. they travel slower in a solid than other solids
c. they stop when they hit a solid
d.sound waves behave the same in any medium
Answer:
A. They travel faster in a solid than other mediums
Explanation:
Sound waves travel faster in solids because the density of solids is higher than that of liquids which means that the particles are closer together and sound can be transmitted more easily.
1. Your big brother, despite warning, drops a penny off the observation
deck of the Empire State Building in New York City. The observation
deck is 381 m above the ground. What is the terminal velocity of the
penny? How far has the penny fallen after 3 seconds?
Answer:
The marble will take 8.813 seconds to hit the ground.
Explanation:
The marble will fall according to this motion equation: y(final) = y(initial) + v(initial)×t + 1/2×a×t×t
y(final)=0 m, the marble's final position in relation to the ground
y(initial)=381 m, the marble's initial position in relation to the ground
v(initial)=0 m/s (meters per second), the marble's initial velocity (speed with direction) when fall first begins
t=? seconds, this is the amount of time that passes while falling, the variable in this problem
a=-9.81 m/s/s, the rate at which the velocity of the marble changes, acceleration. On Earth, neglecting friction, acceleration is a constant at negative 9.81 meters per second squared
Plug the values into the equation: 0= 381 + 0t + 1/2(-9.81)(t)(t)
Subtract 381 from both sides and disregard 0t because it has no value and no longer matters: -381= 1/2(-9.81)(t)(t)
Multiply out the equation: -381= -4.905(t)(t)
Divide both sides by -4.905 to isolate the variable: 77.676=(t)(t)
Find the square root of both sides: t=8.813 seconds
If the strength of the sun's magnetic field decreased from its current level, why would the temperature of sunspots increase?
Magnetic field lines emerge from one sunspot and re-enter at the other spot. Also, there are more sunspots during periods of increased magnetic activity. At ...
The temperature of sunspots increases because magnetic field lines emerge from one sunspot and reappear in another. During periods of increased magnetic activity, there are also more sunspots.
What is the sun's magnetic field?The magnetic field of the sun has two poles, similar to a bar magnet. Every 11 years, at the peak of the solar activity cycle, the poles flip.
The magnetic field is carried away from the sun's surface and through the solar system by a solar wind made up of charged particles. The sun is more like a fluid than a solid ball.
Thus, the magnetic field lines emerge from one sunspot and reappear in another. During periods of increased magnetic activity, there are also more sunspots.
Learn more about sun's magnetic field
https://brainly.com/question/14848188
#SPJ2
What happens when acetate rubs with wool
When a Cellulose Acetate rod is rubbed with a woolen duster, friction occurs, rubbing loosely held electrons from the rod onto the duster. So, this time, the rod loses electrons. Since the Acetate rod now has fewer electrons than protons it has become positively charged. Hope this helps!
Answer:
The charge becomes positive.
Explanation:
When rubbed with cellulose acetate the charge of the fur/wool will become negative.
A dog runs 60 meters in 6 seconds. What is the average speed?
a
0.1 m/s
b
10 m/s
c
360 m/s
d
not enough information to tell
Answer:
Distance =60m, Time = 6s, Speed = ?
Speed = distance/time
= 60/6
=10m/s
Explanation:
Hope that this is helpful.
Have a nice day.
a dishwasher has a wattage of 1,500 watt. It takes the dishwasher 100 minutes to complete one wash cycle. How much energy does the dishwasher use to complete one wash cycle
Answer:
ima be honest i don't know the answer im just doing this so brainly can leave me alone sorry lol
Explanation:
blah blah blah blah blah blah blah yada yada yada i answerd this question i guess
TRUE OR FALSE The sun has more gravity than the earth because it is more massive.
Five example of effect of gravitation in our daily life
Five example of effect of gravity in our daily life
Five example of free fall in our daily life
Answer:
The apple
falling to our death
the earth pulling us down
what a rock falls onto our head and we die
when a child falls into a volcano and lives for 2 seconds and then dies
Explanation:
Which statement about magnetic force is FALSE?
What is the acceleration of a car that maintains a constant velocity of 24 m/s for 10 seconds?
a.
24 m/s2
b.
240 m/s2
c.
2.4 m/s2
d.
0 m/s2
please can anybody tell me what is this lab equipment
Answer:
hii there
its a test tube holder
Explanation:
hope it helps
when electricity is passed through aqueous solution of Sodium chloride following reaction takes place. Identify the correct combination of given options. (a). This process is called chlor-alkali process. (b). Chlorine gas is given off at the cathode, Hydrogen gas at anode and sodium hydroxide solution near cathode. (c). chlorine gas obtained in this process can be used as disinfectant. (d). Chlorine gas is given off at the anode, hydrogen gas at cathode and Sodium hydroxide solution formed near cathode. (e). sodium hydroxide solution is called brine. (f). The given equation doesn't obey law of conservation of mass.
Answer:
When electricity is passed through an aqueous solution of sodium chloride, it gives hydrogen, chlorine and sodium hydroxide as a product. The balanced chemical equation is, This process is called as Electrolysis of Brin im in hardvard dont cheat and get good grades and become a graduate in hardvard
Explanation:
A 5.0 kg cannonball is fired horizontally at 68 m/s from a 15-m-high cliff. A strong tailwind exerts a constant 12 N horizontal force in the direction the cannonball is traveling. What is the extra distance (d)?
Answer:
3.7 m
Explanation:
ASSUMING this means extra distance beyond where the cannonball would land WITHOUT the wind assistance but in general ignoring air resistance. Hmmmmmm...tricky
The ball drops from vertical rest to ASSUMED horizontal ground 15 m below in a time of
t = √ (2h/g) = √(2(15)/9.8) = 1.75 s
Without the tail wind, the ball travels horizontally
d = vt = 68(1.75) = 119 m
The tailwind exerts a constant acceleration on the ball of
a = F/m = 12/5.0 = 2.4 m/s²
The average horizontal velocity during the flight is
v(avg) = (68 + (68 + 2.4(1.75)) / 2 = 70.1 m/s
so the distance with tailwind is
d = v(avg)t = 70.1(1.75) = 122.675 m
The extra distance is 122.675 - 119 = 3.675 = 3.7 m
bus travels 6 km east and then 8 km south. What is the displacement?
Answer:
d = √(6² + 8²) = 10 km
Explanation:
displacement is a vector and subject to vector addition.