1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
antoniya [11.8K]
3 years ago
7

Active transport is a process that uses energy to move materials through a

Physics
1 answer:
Nat2105 [25]3 years ago
5 0
Not good with this but I’m gonna guess cell membrane?
You might be interested in
Which of the following scenarios would be optimal for obtaining a date from radioactive decay using these isotopes: 87Rb, 147Sm,
REY [17]

Answer:

a) 238U, 40K and 87Rb, b)   235U and to a lesser extent 40K , c)  he 235U,

d) possibility is 14C , e)this period would be ideal for 14C , f) 14C should be used since it is the one with the least average life time, even though the measurements must be very careful

Explanation:

One of the applications of radioactive decay is the dating of different systems.

To do this, the quantity of radioactive material in a meter is determined and with the average life time, the time of the sample is found.

Let's write the half-life times of the given materials

87Rb T ½ = 4.75 1010 years

147Sm T ½ = 1.06 1011 years

235U = 7,038 108 years

238U = 4.47 109 years

40K = 1,248 109 years

14C = 5,568 103 years

we already have the half-life of the different elements given

a) meteors. As these decomposed in the formation of the solar system, their life time is around 3 109 to 5 109 years, so it is necessary to look for elements that have a life time of this order, among the candidates we have 238U, 40K and 87Rb if these elements were at the moment of the formation of these meteors, there must still be rations in them, instead elements 14C already completely adequate

b) rock. The formation period is 4.20-108 years, therefore one of the most promising elements is 235U and to a lesser extent 40K since it is more abundant in rocks. The other elements with higher life times have not decayed and therefore will not give a true value and the 14C is completely decayed

c) volcanic ash. Formation time 6107 years, the only element that has the possibility of having a count is the 235U, the others have a life time so long that they have not decayed and the 14C is complete, unbent

d) scarp of an earthquake formation time 5 101 years, The only one that has any possibility is 14C even when it has declined very little, all the others, you have time to long that has not decayed

e) INCA excavation. The time of this civilization is about 10000 to 500 years (104 to 5 102 years), we see that this period would be ideal for 14C since it has some period of cementation, the others have not decayed

f) Tree in Blepharitis. 14C should be used since it is the one with the least average life time, even though the measurements must be very careful because of a period of disintegration. We have such a long time that they have not decayed

8 0
3 years ago
15 points! Answer FAST!
Usimov [2.4K]

Answer:heat brings it up then down

Explanation:

4 0
3 years ago
Determine the stiffness of the spring to hold the 85-kg crate in the position shown.
GalinKa [24]
Correct position spring hold it
5 0
3 years ago
a father and his son are racing down a mountain. if they're traveling at the same velocity who has more kinetic energy​
lakkis [162]

Answer:

I think it's the son

Explanation:

bcs he might love it

8 0
2 years ago
Given a force of 100 N and an acceleration of 10 m/s2, what is the mass?
Drupady [299]
F=ma, so 100=m×10. Solve for m by dividing by 10. The mass is 10 kg.
5 0
3 years ago
Other questions:
  • Is everyone in your class able to hear a quiet sound equally well?
    6·1 answer
  • What is gravity? I need help.
    14·2 answers
  • A power source of 6.0 V is attached to the ends of a capacitor. The charge is 12 C.
    8·2 answers
  • What happens to the density of a given substance if you increase the amount of the substance that you have?
    10·2 answers
  • A concert loudspeaker suspended high off the ground emits 39 w of sound power. a small microphone with a 1.0 cm2 area is 60 m fr
    5·1 answer
  • A rocket ship starts from rest and turns on its forward booster rockets, causing it to have a constant acceleration of 4 \,\dfra
    15·1 answer
  • a car accelerates uniformly from rest to a speed of 65 km/h (18 m/s) in 12s. Find the distance the car travels during this time?
    8·1 answer
  • An object is placed at 0 on a line. It moves 3 units to the rights then 4 to the left and then 6 units to the rigth.the displace
    11·1 answer
  • Your car is initially at rest when your hit that gas and the car begins to accelerate at a rate of 1.464 m/s/s. The acceleration
    6·1 answer
  • Approximately how many Sun's are in the Milky way?
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!