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
Nonamiya [84]
3 years ago
8

An element has 4 protons, 5 neutrons, and 4 electrons. What is the atomic mass of the element? 4 5 8 9

Physics
2 answers:
alex41 [277]3 years ago
5 0

at mass = protons+neutrons=9

babymother [125]3 years ago
5 0

Answer:

9

Explanation:

The atomic mass is defined as the sum of number of protons and the neutrons.

The atomic number is defined as the number of protons in the nucleus.

Here, the number of protons are 4

the number of neutrons are 5

So the sum of number of protons and neutrons = 4 + 5 = 9

Thus, the atomic mass of the element is 9.

You might be interested in
A VW Beetle goes from 0 to 60.0 mi/h with an acceleration of +2.35 m/s^2. (a) How much time does it take for the beetle to reach
Firlakuza [10]
Im going to tell you what to do but not the result. So pay close attention: the first thing you need to do is convert miles/h to m/s. Then for the part a) <span>divide the final velocity by the initial velocity. That will give you the amount of it will take to accelerate to the final velocity.Now for the part b you </span>use the formula v=vo+at. I hope this can help you
8 0
3 years ago
What is the momentum of a 72 kg baseball player who slides into home plate
Alina [70]

Answer:

B) 350 kg m/s

Explanation:

momentum or p is given by the equation p= mxv

We have the mass and velocity so we can use the equation directly

p= 72kg x 4.9 m/s

p= 352.8 kg m/s

4 0
2 years ago
In the two-slit experiment, monochromatic light of frequency 5.00 × 1014 Hz passes through a pair of slits separated by 2.20 × 1
asambeis [7]

Explanation:

It is given that,

Frequency of monochromatic light, f=5\times 10^{14}\ Hz

Separation between slits, d=2.2\times 10^{-5}\ m

(a) The condition for maxima is given by :

d\ sin\theta=n\lambda

For third maxima,

\theta=sin^{-1}(\dfrac{n\lambda}{d})

\theta=sin^{-1}(\dfrac{n\lambda}{d})

\theta=sin^{-1}(\dfrac{nc}{fd})  

\theta=sin^{-1}(\dfrac{3\times 3\times 10^8\ m/s}{5\times 10^{14}\ Hz\times 2.2\times 10^{-5}\ m})  

\theta=4.69^{\circ}

(b) For second dark fringe, n = 2

d\ sin\theta=(n+1/2)\lambda

\theta=sin^{-1}(\dfrac{5\lambda}{2d})

\theta=sin^{-1}(\dfrac{5c}{2df})

\theta=sin^{-1}(\dfrac{5\times 3\times 10^8}{2\times 2.2\times 10^{-5}\times 5\times 10^{14}})

\theta=3.90^{\circ}

Hence, this is the required solution.

8 0
3 years ago
Which of the following factors affects the pressure of an enclosed gas?
melamori03 [73]
It would be d all of the above

5 0
3 years ago
Read 2 more answers
A heat engine exhausts 3 000 J of heat while performing 1 500 J of useful work. What is the efficiency of the engine
amid [387]

efficiency=work output/work input×100

since it exhausts(use up)3000j of heat that's the work input and the 1500j is the work input

efficiency=1500/3000×100

=50%

3 0
2 years ago
Other questions:
  • Marta, Cato, and Juan plan a skit to illustrate one of the methods of charging. Marta and Cato are walking together. Each has on
    8·1 answer
  • Will you travel in 3.0 minutes running at a rate of 6.0 m/s
    15·1 answer
  • As she was trying to study, Tanisha asked her roommate to lower the radio. Her roommate had turned the radio up originally from
    7·1 answer
  • What's wrong with the following statement? “The racing car turns around
    11·1 answer
  • Two carts (m1 = m2 = 0.400 kg) are placed on an aluminum track. The first cart is pushed with the initial velocity of 1.5 m/s to
    8·1 answer
  • A tractor pulls a 978 kg wagon at a velocity of 4.9 m/s. How many watts of power are exerted by the tractor motor is the tractor
    10·1 answer
  • HELP ASAP PLSSSS WILL BE MARKED BRAINLIEST
    12·1 answer
  • Habiba and selehadin have measured the voltage across a resistor to be 5.26V and the current flowing through in to be 0.41A they
    6·1 answer
  • In a photovoltaic system, an inverter is required to:.
    6·1 answer
  • On the way to school, the bus speeds up from 20 m/s to 36 m/s in 4 seconds. What distance
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!