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
Vera_Pavlovna [14]
2 years ago
12

What do signal trainees do

Physics
1 answer:
Evgen [1.6K]2 years ago
8 0

Answer:

A signal apprentice works for a rail company, learning the duties of a signal maintainer through on-the-job training and experience. As part of this apprenticeship, you work on a railway to assist a seasoned signal maintainer as they install, repair, inspect, and test signal equipment.

Explanation:

You might be interested in
Please please help
dsp73

Answer:

true

Explanation:

The law of conservation of charge states that whenever electrons are transferred between objects, the total charge remains the same.

3 0
3 years ago
The acceleration of an object depends upon
aalyn [17]
Its mass and net force acting on it
4 0
2 years ago
Read 2 more answers
The physical and chemical breakdown of food for use by body cells and the elimination of solid wastes are accomplished by which
RSB [31]
The answer is D. Digestive! The digestive system breaks down your food and helps to eliminate waste!
5 0
3 years ago
A 4.0kg bowling ball sliding to the right at 8.0 m/s has an elastic head-on collision with another 4.0 kg bowling ball initially
Kisachek [45]

a)

We use the formula :

m1v1i + m2v2i = m1v1f + m2v2f

Substituting the values in:

4.0kg*8.0m/s + 4.0kg*0m/s = 4.0kg*0m/s +4.0kg*v2f

Calculating this we get:

32.0kg*m/s + 0kg*m/s = 0kg*m/s + 4.0kg*v2f

Rearrange for v2f:

v2f = \frac{32.0kg*m/s}{4.0kg}

This gives us 8.0 m/s as the final velocity of the second ball.

b)

Since the collision is assumed to be elastic it means that the kinetic energy must be equal before and after the collision.

This means we use the formula:

Ek = \frac{1}{2} *m*v^{2}+ \frac{1}{2} *m*v^{2} = \frac{1}{2} *m*v^{2} +  \frac{1}{2}*m*v^{2}

Substituting in values:

Ek = 0.5*4.0kg*(8.0m/s)^2 + 0.5*4.0kg*(0m/s)^2 = 0.5*4.0kg*(0m/s)^2 + 0.5*4.0kg*(8.0m/s)^2

This simplifies to:

Ek= 128J + 0J = 0J + 128J

This shows us that the kinetic energy is equal on each side therefore the collision is Elastic and no energy has been lost.

6 0
2 years ago
The uniform circular motion of a space station can be used to create artificial gravity. This can be done by adjusting the angul
DENIUS [597]

Answer:

The acceleration at the astronaut's head decreases.

Explanation:

Since the centripetal acceleration equals acceleration due to gravity,

a = g = GM/R². since a changes infinitesimally from his foot to his head, we differentiate a with respect to r to get da/dr = -2GM/R³.

So, da, the change in acceleration = -2GMdR/R³ = -2gdR/R = -2 × 9.8/6.4 × 10⁶ m =  -3.0625 × 10⁻⁶dR m/s².

Since dR = height of astronaut = 1.80 m, da = -3.0625 × 10⁻⁶ × 1.8 = -5.5125 × 10⁻⁶ m/s².

So the acceleration at the astronaut's head is g + da = 9.8 - 0.0000055125 = 9.7999944875 m/s².

So the acceleration at the astronaut's head decreases.

3 0
2 years ago
Other questions:
  • How much heat energy is produced by 0.5 Wh of electrical energy ?
    9·2 answers
  • Which evidence did Ottowa scientists collect in researching PCB concentrations in Alaska?
    9·2 answers
  • Which is longer, 10 cm or .01 m?
    11·1 answer
  • Bob is pushing a box across the floor at a constant speed of 1.4 m/s, applying a horizontal force whose magnitude is 65 N. Alice
    5·1 answer
  • Please help!!! A river has a constant current of 3 km per hour. If a motorboat, capable of maintaining a constant speed of 20km
    9·1 answer
  • Four equal masses m are so small they can be treated as points, and they are equally spaced along a long, stiff wire of neglible
    11·1 answer
  • You are asked to construct a mobile with four equal m = 141 kg masses, and three light rods of negligible mass and equal lengths
    9·1 answer
  • Larry sees a group of people weeping, with frowns on their faces and their eyes turned down. Larry their expressions to understa
    13·1 answer
  • what moon phase will occur about 14 days after a first quarter?
    15·1 answer
  • What will happen to people involved in handling Gamma rays if they are not providedwith lead coated apron and equipment without
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!