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
kozerog [31]
3 years ago
8

Can someone explain to me #4.

Physics
1 answer:
nalin [4]3 years ago
4 0
A) We balance the masses: 4(1.00728) vs 4.0015 + 2(0.00055)4.02912 vs. 4.0026This shows a "reduced mass" of 4.02912 - 4.0026 = 0.02652 amu. This is also equivalent to 0.02652/6.02E23 = 4.41E-26 g = 4.41E-29 kg.
b) Using E = mc^2, where c is the speed of light, multiplying 4.41E-29 kg by (3E8 m/s)^2 gives 3.96E-12 J of energy.
c) Since in the original equation, there is only 1 helium atom, we multiply the energy result in b) by 9.21E19 to get 3.65E8 J of energy, or 365 MJ of energy.
You might be interested in
What is the theory of time called?
murzikaleks [220]
I think its Eternalism
7 0
3 years ago
Read 2 more answers
How to Answer questions 12 and 13
zubka84 [21]

12) The weight of the plane is 7.35\cdot 10^5 N

13) The lift provided by the wing is 7.35\cdot 10^5 N

Explanation:

12)

The weight of an object is equal to the force of gravity acting on the object. Near the Earth's surface, it can be calculated as

W=mg

where

W is the weight

m is the mass of the object

g is the acceleration of gravity

In this problem, we know that the mass of the plane is

m = 75 tonnes

Since 1 ton = 1000 kg, the mass in kg is

m = 75,000 kg

Also, the acceleration of gravity is

g=9.8 m/s^2

Therefore, the weight of the plane is:

W=(75,000)(9.8)=7.35\cdot 10^5 N

13)

We can solve this question by applying Newton's second law along the vertical direction of motion. In fact, the net force acting along the vertical direction must be equal to the product between the mass of the plane and the vertical acceleration:

\sum F_y = ma_y

where

\sum F_y is the net force in the y-direction

m is the mass of the plane

a_y is the acceleration in the y-direction

There are two forces acting in the vertical direction:

  • The lift L, acting upward
  • The weight W, acting  downward

So the vertical net force is

\sum F_y = L-W

And the equation becomes

L-W = ma_y

Also, we know that the plane is travelling in level flight, which means that the vertical acceleration is zero:

a_y = 0

Therefore, we get

L-W=0

And so the lift is

L=W=7.35\cdot 10^5 N

Learn more about  forces:

brainly.com/question/8459017

brainly.com/question/11292757

brainly.com/question/12978926

#LearnwithBrainly

4 0
3 years ago
What is the current when a 71-W lamp is connected to 120 V?
vredina [299]
Power = (voltage) · (current)

71 W  =  (120 V) · (current)

Divide each side by (120 V) :

Current = (71 W) / (120 V)  =  0.59167 Amperes

What I want to know is:  Where can I buy a 71-W light bulb ?
5 0
3 years ago
A type of cuckoo clock keeps time by having a mass bouncing on a spring, usually something cute like a cherub in a chair. What f
Paul [167]

Answer:

k = 7.32 N/m

Explanation:

We know that the time period of a spring mass system is given as follows:

T = 2π√(m/k)

T² = 4π²m/k

k = 4π²m/T²

where,

k = force constant = ?

m = mass = 0.019 kg

T = Time Period = 0.32 s

Therefore,

k = 4π²(0.019 kg)/(0.32 s)²

<u>k = 7.32 N/m</u>

8 0
3 years ago
Identify the different parts of the face ​
Vaselesa [24]

Answer:

head

four head

hair

eyes

ears

nose

lips

chick

chin

eyebrow

eyelid

7 0
3 years ago
Other questions:
  • Brycen can cover half a basketball court (about 14 meters) in 4.0 seconds flat! How fast can he run?
    8·1 answer
  • There is a(n) __________ relationship between an object's weight and its mass.
    10·1 answer
  • If a ball is rolling across a floor at a constant speed is it accelerating
    10·1 answer
  • jack wants to find out which laundry detergent cleans the best ( Gain, Tide, or Purex). So, he takes a cotton sheet and cuts it
    11·2 answers
  • An aurora occurs when ____
    11·1 answer
  • Air at 25°C and 5 atm is throttled by a valve to 1 atm. If the valve is adiabatic and the change in kinetic energy is negligible
    13·1 answer
  • A brand of earplugs reduces the sound intensity level by 27 dB.By what factor do these earplugs reduce the acoustic intensity?
    9·1 answer
  • What is the motion and arrangement of molecules in a liquid
    7·1 answer
  • The movement of electrons through a wire is called.....
    10·2 answers
  • The free-body diagram of a crate is shown.
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!