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
Greeley [361]
4 years ago
10

Metals in group 1 on the periodic table most commonly form which type of ion

Physics
1 answer:
givi [52]4 years ago
7 0

Answer:

Group 1 - the alkali metals. The Group 1 elements in the periodic table are known as the alkali metals.

Explanation:

You might be interested in
In our new car, we were able to drive 30 miles in a half an hour. From this information, we can determine the car's
Ronch [10]
Average speed.
(Not velocity.)
5 0
3 years ago
A person sits on a freely spinning lab stool that has no friction in its axle. When this person extends her arms, A. her moment
Andrei [34K]

Answer:

  C. her moment of inertia increases and her angular speed decreases

  D. her moment of inertia increases and her angular speed decreases

Explanation:

The moment of inertia of a body is the sum of the products of an increment of mass and the square of its distance from the center of rotation. When a spinning person extends her arms, part of her mass increases its distance from the center of rotation, so increases the moment of inertia.

The kinetic energy of a spinning body is jointly proportional to the moment of inertia and the square of the angular speed. Hence an increase in moment of inertia will result in a decrease in angular speed unless there is a change in the rotational kinetic energy.

This effect is used by figure skaters to increase their spin rate by drawing their arms and legs closer to the axis of rotation. Similarly, they can slow the spin by extending arms and legs.

When the person extends her arms, her moment of inertia increases and her angular speed decreases.

_____

<em>Note to those looking for a letter answer</em>

Both choices C and D have identical (correct) wording the way the problem is presented here. You will need to check carefully the wording in any problem you may think is similar.

3 0
4 years ago
Two charges 5 c and 15 c are seperated by 10 cm. what is the electric force between them?
icang [17]

Answer:

6.75×10^13N

Explanation:

The electric force between the charges can be determined using coulombs law which states that 'the force of attraction between two charges is directly proportional to the product of the charges and inversely proportional to the square of their distance between them.

Mathematically, F = kq1q2/r² where;

q1 and q2 are the charges

r is the distance between the charges

F is the force of attraction

k is the coulombs constant

Given q1 = 5C q2 = 15C r = 10cm = 0.1m k = 9×10^9Nm²/C²

Substituting the given values in the formula we have;

F =9×10^9×5×15/0.1²

F = 6.75×10^11/0.01

F = 6.75×10^13N

Therefore the electric force between them is 6.75×10^13N

8 0
3 years ago
Mr. Stephenson drives his car from Dallas to Town X, a distance of 437 km. The trip takes 7.27 hours. What is the average speed
Rom4ik [11]
I believe the answer is <span>216396.148556 meters per second</span>
7 0
3 years ago
Read 2 more answers
A brick is dropped from a high scaffold. <br> a. How far does the brick fall during this time?
Alecsey [184]

Answer:

a: after 1 seconds it will have fallen 0.2452

after 2 seconds it will have fallen 0.981

after 3 seconds it will have fallen 2.2072

after 4 seconds it will have fallen 3.924

Explanation:

the formula for acceleration due to gravity is (ignoring friction I think)

g = G*M/R^2

earths gravitational constant is about 9.807

g = 9.807*M/R^2

The average weight of a brick is 5 pounds and I'm going to say it's 10 feet off the ground.

g = 9.807*5/10^2.         g = 0.4905 so every second the brick will go 0.4905 fps faster. (fps means feet per second.)

after 1 seconds it will have fallen 0.2452

after 2 seconds it will have fallen 0.981

after 3 seconds it will have fallen 2.2072

after 4 seconds it will have fallen 3.924

6 0
3 years ago
Other questions:
  • a racing car undergoes a uniform acceleration of 4.00m/s2. if the net force causing the acceleration is 3.00 times 10^3 N, what
    9·1 answer
  • Which simple machines combine to make scissors? A. one lever and two wedges B. two levers and two wedges C. one inclined plane a
    11·2 answers
  • Medical imaging would be best suited for which situation(s)?
    13·2 answers
  • An object falls freely from a height of 25m onto the roof of a
    13·1 answer
  • Explain why hot air goes up
    8·2 answers
  • What was the name of charles lindbergh’s single winged airplane for his solo flight across the atlantic?
    12·1 answer
  • A house at the bottom of a hill is fed by a full tank of water 5m deep and connected to the house by a pipe that is 110m long at
    8·1 answer
  • This is because we see evidence of plate movement in the fact that as we look at rocks farther and farther from the ridge, the r
    15·2 answers
  • Explain why selling cereal by mass rather then by volume be more fair to customers
    5·1 answer
  • What is precision?what is precision? ​
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!