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
sertanlavr [38]
3 years ago
6

Question 8 (1 point) How many protons are in an element with an atomic number of 8 and a mass number of 18? a 3 b 8 c 10 d 18

Physics
1 answer:
yarga [219]3 years ago
6 0

Answer: B - 8

Explanation: 8 protons because number of protons is equal to number of atoms in the nucleus.

You might be interested in
A kettle of water contains 1.2 kg of water. Calculate how much energy is required to hear it from water at 10 degrees to its boi
Darya [45]

Answer:

450 kJ

Explanation:

Q = mCΔT

where Q is heat (energy),

m is mass,

C is specific heat capacity,

and ΔT is the temperature change.

Q = (1.2 kg) (4180 J/kg/°C) (100°C − 10°C)

Q = 451,440 J

Q ≈ 450 kJ

6 0
3 years ago
14. Which is the relationship between photon energy and frequency?
yawa3891 [41]

Answer:

The amount of energy is directly proportional to the photon's electromagnetic frequency and thus, equivalently, is inversely proportional to the wavelength. The higher the photon's frequency, the higher its energy.

i hope this helps.

Explanation:

5 0
2 years ago
What is the velocity of a wave with a wavelength of 1.5m and a frequency of 500 Hz
Schach [20]
Wave speed  =  (wavelength) x (frequency)

                       = (1.5 m) x (500 / sec)

                       =       750 m/s .  
4 0
3 years ago
A 4 V power source is connected in parallel to four resistors: 1, 2, 2, and 3. Find the total current.
Keith_Richards [23]

Answer:

Explanation:

Equivalent resistance is 1 / ((1/1) + (1/2) + (1/2) + (1/3)) = 3/7 Ω

I = V/R = 4(7/3) = 28/3 = 9.3 A    

4 0
2 years ago
He lungs and respiratory system work closely with the ___________ system to make sure oxygen reaches all the cells of our body.
vlada-n [284]
Im pretty sure it is answer a

8 0
3 years ago
Read 2 more answers
Other questions:
  • Tony is driving a truck of mass 2.00 × 103 kilograms to the west with a velocity of 14.0 meters/second. He collides with a car o
    9·2 answers
  • How much energy (in kilojoules) is required to convert 200 mL of diethyl ether at its boiling point from liquid to vapor if its
    14·1 answer
  • A uniform disk, a thin hoop, and a uniform sphere, all with the same mass and same outer radius, are each free to rotate about a
    11·1 answer
  • What activity is mainly a strength training excerise?
    6·1 answer
  • Hyperkinetic means too little movement true or false?
    15·1 answer
  • A stationary block resting on the ground is pulled up with a tension force of 100N, but does not leave the ground.
    5·1 answer
  • True or False: A 24 year old motorcycle driver would not be required to wear protective eyewear when riding in Florida.
    9·2 answers
  • What is your mass in kilograms if you weigh 120 pounds
    7·1 answer
  • HELPPPPP
    6·1 answer
  • The half life of uranium-235 is 4. 5 billion years. If 0. 5 half-lives have elapsed, how many years have gone by?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!