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
aleksandr82 [10.1K]
3 years ago
13

The word “cumulative” means that something builds on itself. Which example best shows how scientific knowledge is cumulative? A.

Watson and Crick worked together to come up with the model of DNA. B. Kepler based his laws of planetary motions off of Newton’s law of gravity. C. Hardy and Weinberg independently came up with a population equation. D. Darwin and his grandfather both worked on the ideas of survivability.
Physics
1 answer:
ioda3 years ago
4 0

Answer:

B

Explanation:

Kepler embodied cummulative knowledge(succession).

You might be interested in
An 80-kg bungee jumper jumps off a bridge. Rubber bungee cords act as a large spring attaching the jumper to the bridge. A bear
inysia [295]

Answer:

The force is F_b =  216 \  N

Explanation:

From the question we are told that

   The  mass of the bungee jumper is  m  = 80 kg

    The spring constant is  k =  20 \  N/ m

    The extension of the rubber bungee cords is  x = 50 m

Generally the weight of the jumper is

      W =  m *  g

=>   W =  80 *  9.8

=>   tex]W =  784  \  N  [/tex]

Generally  the returning force of the rubber bungee cords is mathematically represented as

      F  =  k  *  x

=>     F  =  20   * 50

=>     F  =  1000 \  N

The force to be applied by the bear is

    F_b =  F -  W

=>    F_b =  100 -  784

=>  F_b =  216 \  N

6 0
3 years ago
Un hombre de pie puede ejercer la misma fuerza con sus piernas tanto en la tierra como en la luna. Sabemos que la masa del hombr
Paul [167]

Answer:

The height jumped by the person on the moon is 6 times the height jumped by the person on earth.  

Explanation:

As we know that the acceleration due to gravity on moon is 1/6 of the acceleration due to gravity on earth.

So, it is false.

Let the mass of man is m and the gravity on moon is g' = g/6.

Let the height jumped on earth is h and the height jumped on moon is h'.

So,

m x g' x h' = m x g x h

g/6 x h' = g x h

h' = 6 h  

So, the height jumped by the person is 6 times the height jumped by the person on earth.

6 0
3 years ago
PLLEEEASE HELP!!! How does archimedes' principle explain how much fluid is displaced by an object?
Crank

The concept of Archimedes' principle is that an object immersed in a fluid is buoyed up by a force equal to the weight of the fluid displaced by the object. The fluid displaced has a weight W = mg, where g is acceleration due to gravity. Therefore, the weight of the displaced fluid can be expressed as W = ρVg.

8 0
3 years ago
During a free fall Swati was accelerating at -9.8m/s2. After 120 seconds how far did she travel?
SIZIF [17.4K]

-70560, -9.8/2 = -4.9

120^2 = 14400.

Now you multiply 14400 * -4.9 = -70560m.

4 0
4 years ago
Newton's law of cooling states that the temperature of an object changes at a rate proportional to the difference between its te
alexgriva [62]

Answer:

4.9 minutes

Explanation:

Given; T(t) = Ce^-kt + Ts

Now;

T(t) = 190 degrees Fahrenheit

Ts = 60 degrees

To obtain C;

190 = Ce^0 + 60

190 - 60 = C

C = 130

Hence, to find k when t=11

172 = 130 e^-11k + 60

172 -60/130 = e^-k

e^-k = 0.86

ln(e^-k) = ln( 0.86)

-k = -0.15

k = 0.15

Hence at 122 degrees, t is;

T(t) = Ce^-kt + Ts

122 = 130e^-0.15t + 60

122 - 60/130 = e^-0.15t

0.477 = e^-0.15t

ln (e^-0.15t) = ln (0.477)

-0.15t = -0.74

t = 0.74/0.15

t = 4.9 minutes

5 0
3 years ago
Other questions:
  • an input force of 50 Newtons is applied through a distance of 10 meters to machine with mechanical advantage of 3. If the work o
    8·1 answer
  • What carries the oxygen to every cell of your body
    11·1 answer
  • Why do solid have fixed shape?
    7·2 answers
  • a cell supplies a current 0.9A through a resistance of 2 ohms and a current of 0.3A through a resistance of 7 ohms. what is inte
    11·1 answer
  • A solenoid contains 705 coils of very thin wire evenly wrapped over a length of 15.5 cm. Each coil is 2.50 cm in diameter. If th
    10·1 answer
  • How to find resistance from power and Voltage????
    6·1 answer
  • A material that freely accepts the flow of electrons is called
    9·1 answer
  • Two balls with masses of 2.0 kg and 6.0 kg travel toward each other at speeds of 12 m/s and 4.0 m/s, respectively. If the balls
    8·1 answer
  • To get an idea of how much thermal energy is contained in the world's oceans, estimate the heat liberated when a cube of ocean w
    8·1 answer
  • An elevator accelerates upward at 1.2 m/s 2 . the acceleration of gravity is 9.8 m/s 2 . what is the upward force exerted by the
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!