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
kipiarov [429]
2 years ago
7

An oil droplet is levitated and held at rest in a region where the electric field is 1.4x104 N/C directed vertically downwards.

If the droplet has 3 excess electrons attached, what is its mass
Physics
1 answer:
Ratling [72]2 years ago
8 0

W = m g     weight of drop

W = q E

m = q E / g = = 3 e E / g

m = 3 * 1.6E-19 * 1.4E4 / 9.8 = 6.96E-16 kg

You might be interested in
Eric is creating a timeline of the formation of the solar system. Which sequence best describes the formation of the solar syste
vlada-n [284]

The answer is C. nebular are star nurseries. When the massive gas being collapsing in its own weight. Local areas of gas begin to coalesce under gravity. Due to enormous pressure, nuclear fusion begins and a protostar is formed. The protostar grows into the sun as more hydrogen fuses at the core. The planetesimal materials at the edges of the protostellar discs coalesce to form planets that orbit the star.

3 0
3 years ago
Read 2 more answers
If another vehicle is trying to pass your vehicle,
Vladimir [108]

Answer:

Reduce you're speed, and let the other vehicle pass you

8 0
3 years ago
What is meant by specific latent heat of fussion​
Lunna [17]

Answer:

Boiling point of water is 100 deg C. It takes about 540 cal to change 1 g of water at the boiling point to 1 g of steam at 100 deg C.

5 0
2 years ago
47. A car travels 85 km in the first half hour of a trip. The car continues to travel for 2 more hours and travels 200 km. What
Otrada [13]

Answer: 114 km/h

Explanation:

The formula for determining average speed is expressed as

Average speed = total distance/total time

The car travels 85 km in the first half hour of a trip. The car continues to travel for 2 more hours and travels 200 km. It means that the total distance that the car travels is

85 + 200 = 285 km

The total time spent by the car is

0.5 + 2 = 2.5 hours

Therefore,

Average speed = 285/2.5 = 114 km/h

3 0
3 years ago
A golf ball is rolling in the grass. What must happen to stop the ball from continuing to roll?
slamgirl [31]
The net force must be zero

This is in accordance to Newton's first law, which states that any object in motion will remain in motion and any object at rest will remain at rest unless acted upon by an unbalanced force. An unbalanced force is one where the net force is not zero. If no unbalanced force is applied to a moving object, it will keep moving forever. The reason that we do not observe this in our daily lives is due to friction acting as the unbalanced force.
4 0
3 years ago
Other questions:
  • Two rocks collide in outer space. Before the collision, one rock had mass 11 kg and velocity ‹ 4250, −2950, 2500 › m/s. The othe
    13·1 answer
  • What prominent sea floor fetaure is found in the central altlantic ocean
    15·1 answer
  • Use the fact that the speed of light in a vacuum is about 3.00 × 108 m/s to determine how many kilometers a pulse from a laser b
    9·1 answer
  • The Bohr model was determined ultimately to be flawed. Knowing that "opposites attract (and 'likes' repel)," can you think of an
    12·1 answer
  • action and reaction are equal in magnitude and opposite direction then why they don't balance each other
    15·1 answer
  • An electron (e = 1.6 x 10-19 C) is traveling at 4.00 x 107 m/s due North in a horizontal plane through a point where the earth’s
    12·1 answer
  • Eroded debris that is dropped at the glaciers farthest extent when ice melts at the front of the glacier as seen in the image is
    13·1 answer
  • A quantity of hot water at 91°C and another cold one at 12°C.
    13·1 answer
  • I need help with the problem below
    6·1 answer
  • 4.09 Lab: Sunrise, Sunset
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!