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
Nady [450]
3 years ago
12

A physics student is riding on a train traveling north. Having read about inertia, the student performs an experiment with a gol

f ball. He reaches over the aisle and drops the ball from rest. Instead of hitting the floor directly below the student’s hand, it hits to the north, i.e., forward of that position. Which of the following might be the cause for this to happen?
(A) The train is moving at constant
(B) The train is speeding up. veloeity
(C) The train is slowing down.
(D) Whatever the cause, it cannot be any of the answers given.
Physics
1 answer:
mario62 [17]3 years ago
5 0

Answer:

(C) The train is slowing down.

Explanation:

Since the ball seems to move <em>forward, </em>the train is slowing down. This is because Newton's 1st Law, objects inside the train tend to keep their previous state of movement, that is, the velocity before the train start slowing down, thus appearing to move forward in relation with the train itself.

You might be interested in
An electric travel blanket uses a car's 12V supply. The current is 3A.
snow_lady [41]

For electrical devices . . .

           Power dissipated = (voltage) x (current) =

                                             (12 V)  x  (3.0 A) = 36 watts .

1 watt means 1 joule per second

           (36 joule/sec) x (60 sec/min) x (10 min)  =  21,600 joules

5 0
3 years ago
When the liquid line is restricted, the supply of refrigerant to the metering device is reduced. What is the effect on suction p
Nimfa-mama [501]

Answer:

The suction pressure decreases and the superheat increases when the liquid line is restricted and the supply of refrigerant to the metering device is reduced.

Explanation:

1. The five components of refrigeration are:

  • Fluid refrigerant
  • Compressor
  • Condenser coil
  • Evaporator coil
  • Expansion device.

       The compressor limits the vapor released by the refrigerant. This            

       causes a rise in pressure (in refrigerant), which then pushes the  

       vapor into the coils on the outside of the refrigerator.

2. Now when the cooler air meets the warm gas present in the coils, it

   gets converted into liquid form.

3. Thus, when the liquid form is at high pressure, the refrigerant then  

   cools down as it flows through the coils placed in the fridge ( in both

   freezing and normal sections).

4. The refrigerant also absorbs the warm air present in the fridge, which  

   causes it to evaporate and flow back through the compressor and the

   cycle repeats in the same form.

Thus, when the liquid line is restricted and the supply of refrigerant to the metering device is reduced it causes a decrease in suction pressure and an increase in superheat.

Learn more about refrigeration here:

<u>brainly.com/question/9046279</u>

#SPJ4

8 0
2 years ago
A human being can be electrocuted if a current as small as 55 mA passes near the heart. An electrician working with sweaty hands
evablogger [386]

Answer:

The lethal voltage for the electrician under those conditions is 126.5 V.

Explanation:

To discover what is the lethal voltage to the electrician we need to find out what is the voltage that produces 55 mA = 0.055 A when across a resistance of 2300 Ohms (Electrician's body resistancy). For that we'll use Ohm's Law wich is expressed by the following equation:

V = i*R

Where V is the voltage we want to find out, i is the current wich is lethal to the electrician and R is his body resistance. By applying the given values we have:

V = 0.055*2300 = 126.5 V.

The lethal voltage for the electrician under those conditions is 126.5 V.

4 0
3 years ago
Read 2 more answers
A roller coaster car speed is 4 m/s, but 3 seconds later its speed is 22 m/s. What is its average acceleration?
Juli2301 [7.4K]
The velocity increased from 4 m/s to 22 m/s in 3 seconds. 18 m/s in 3 seconds so the average acceleration is change in velocity divided by time. 18 m/s divided by 3 seconds = 6 m/s^2
6 0
3 years ago
An advantage of parallel circuits is that they A) stop transmitting all current if even one resistor breaks. B) form a single pa
svetoff [14.1K]

Parallel circuits allow current to flow even if some paths are cut, because a parallel circuit has more than one current-carrying path through it.

4 0
3 years ago
Read 2 more answers
Other questions:
  • Technician A says that the diameter of a bolt is the same as the wrench size used to remove or install the fastener. Technician
    11·1 answer
  • The superheroine Xanaxa, who has a mass of 67.5 kg , is pursuing the 70.3 kg archvillain Lexlax. She leaps from the ground to th
    5·1 answer
  • A mass of 267 g is attached to a spring and set into simple harmonic motion with a period of 0.176 s. If the total energy of the
    9·1 answer
  • A father racing his son has 1/3 the kinetic energy of the son, who has 1/4 the mass of the father. The father speeds up by 1.5 m
    7·1 answer
  • Select all the correct answers.
    14·2 answers
  • Suppose a well-designed optical instrument is composed of two converging lenses separated by 14 cm. The focal lengths of the len
    8·1 answer
  • What happens when two oceanic plates collide?
    14·2 answers
  • A. 1 and 2 &gt; 3 and 4 = 4 and 5
    13·1 answer
  • A force AB of length 100m and weight 600N has its centre of gravity 4.0 m from the end, and lies on horizontal ground calculate
    9·1 answer
  • RIDDLE
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!