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
defon
3 years ago
13

Dinosaurs emerged during what time period

Physics
1 answer:
swat323 years ago
6 0
Dinosaurs lived between 230 and 65 million years ago, in a time known as the Mesozoic Era<span>. This was many millions of years before the first modern humans, Homo sapiens, appeared. </span>
You might be interested in
To initiate a nuclear reaction, an experimental nuclear physicist wants to shoot a proton into a 5.50-fm-diameter 12C nucleus. T
Fantom [35]

Answer:

V_1= 3.4*10^7m/s

Explanation:

From the question we are told that

Nucleus diameter d=5.50-fm

a 12C nucleus

Required kinetic energy K=2.30 MeV

Generally initial speed of proton must be determined,applying the law of conservation of energy we have

            K_2 +U_2=K_1+U_1

where

K_1 =initial kinetic energy

K_2 =final kinetic energy

U_1 =initial electric potential

U_2 =final electric potential

mathematically

   U_2 = \frac{Kq_pq_c}{r_2}

where

r_f=distance b/w charges

q_c=nucleus charge =6(1.6*10^-^1^9C)

K=constant

q_p=proton charge

Generally kinetic energy is know as

         K=\frac{1}{2}  mv^2

Therefore

         U_2 = \frac{Kq_pq_c}{r_2} + K_2=\frac{1}{2}  mv_1^2 +U_1

Generally equation for radius is d/2

Mathematically solving for radius of nucleus

         R=(\frac{5.50}{2}) (\frac{1*10^-^1^5m}{1fm})

         R=2.75*10^-^1^5m

Generally we can easily solving mathematically substitute into v_1

   q_p=6(1.6*10^-^1^9C)

   K_1=9.0*10^9 N-m^2/C^2

   U_1= 0

   R=2.75*10^-^1^5m

   K=2.30 MeV

   m= 1.67*10^-^2^7kg

   V_1= (\frac{2}{1.67*10^-^2^7kg})^1^/^2 (\frac{(9.0*10^9 N-m^2/C^2)*(6(1.6*10^-^1^9C)(1.6*10^-^1^9C)}{2.75*10^-^1^5m+2.30 MeV(\frac{1.6*10^-^1^3 J}{1 MeV}) }

    V_1= 3.4*10^7m/s

Therefore the proton must be fired out with a speed of V_1= 3.4*10^7m/s

8 0
3 years ago
A spring has a spring constant of 330 n/m. how far is the spring compressed when 150 newtons of force are used?
pishuonlain [190]

Answer:

I think its B

Explanation:

5 0
3 years ago
If the original pressure is 5 atm and original volume is 100 L, and the new volume is 20 L, what is the new pressure?
Nana76 [90]
P1V1=P2V2
5*100=P2*20
500=20P
P=25
7 0
3 years ago
The atmosphere of Neptune and Uranus have a blue color because of which gas?
AURORKA [14]
The gas that gives Neptune and Uranus its amazing blue color is methane 
7 0
3 years ago
Read 2 more answers
Which object has the greatest momentum...and why
damaskus [11]
The formula for momentum is p=mv where p is the momentum (kgms-1), m is the mass (kg) and v is the velocity (ms-1). So, to work out the momentum, we just multiply these numbers together and work out which is the largest.

1) 12kgms-1
2) 10kgms-1
3) 27kgms-1
4) 16kgms-1

Therefore the object with the greatest momentum is 3 - a 9kg mass moving at 3m/s
7 0
3 years ago
Read 2 more answers
Other questions:
  • The three forces acting on a hot-air balloon that is moving vertically are its weight, the force due to air resistance and the u
    5·1 answer
  • When a substance has changed into something new or different so that the original substance is gone, as in digestion, radioactiv
    9·2 answers
  • . The inner and outer surfaces of a 4-m × 7-m brick wall of thickness 30 cm and thermal conductivity 0.69 W/m-K are maintained a
    5·1 answer
  • An atom that changes so that it has an<br> electrical charge is a(n)
    8·1 answer
  • Write examples of adaptation in mangrove .? <br>what are the adaptation of rainforest.?​
    8·1 answer
  • A couch is pushed with a force of 82 N and moves a distance of 6 m across the floor. How much work was done in moving the couch?
    15·1 answer
  • Cuantas veces salta un jugador en un partido medio de voleibol?​
    6·1 answer
  • What are the characteristics of low energy waves? (2 points)
    13·1 answer
  • A ball takes 10s to roll 40 m what is the average speed of the ball
    8·1 answer
  • If the car is traveling at a velocity of 15 m/s, what is the approximate centripetal acceleration of the car?.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!