PHYSICS HIGH SCHOOL

C12H22O11 + 11H2SO4 12C + 11H2SO4 + 11H2OHow do you know the concentrated sulfuric acid is a catalyst?

Answers

Answer 1
Answer: By looking at the equation 
C12H22O11 + 11H2SO4 12C + 11H2SO4 + 11H2O
we can conclude that the concentrated sulfuric acid is a catalyst because
the sulfuric acid doesn't react with the reactant and it is not consumed.

Hope this helps! If you have any other questions or would like further explanation just let me know!! :)
Answer 2
Answer:

Answer:no

Explanation:

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When 10 N force applied at 30 degrees to the end of a 20 cm handle of a wrench, it was just able to loosen the nut. What magnitude of the force would require to just loosen the nut, if the force apply perpendicularly at the end of the handle

Answers

Answer:

5N

Explanation:

To get the magnitude of the force would require to just loosen the nut, if the force apply perpendicularly at the end of the handle, we will have to resolve the force perpendicular to the wrench. Torque is the turning effect of a body or force about a point. It is similar to moments.

Torque = Force * radius

Note that the force must be perpendicular to the wrench. On resolving the force perpendicularly to the wrench, we will have to resolve the force to the vertical.

Fy = Fsinθ

Fy = 10sin30°

Fy = 10 * 0.5

Fy = 5N

Torque = Fy * r

Given Fy = 5N and r = 20cm = 0.2m

Torque = 5 * 0.2

Torque = 1Nm

Hence the magnitude of the force would require to just loosen the nut, if the force apply perpendicularly at the end of the handle is 5N

A truck is moving around a circular curve at a uniform velocity of 13 m/s. If the centripetal force on the truck is 3,300 N and the mass of a the truck is 1,600 kg what's the radius of the curve.

Answers

The radius of the curve is 81.93 metres. We can work this out byconsidering the centripetal force (Fc) = mass x centripetalacceleration.
Fc = m x u (squared)
R = mu (squared) over Fc = 1600 x (13 squared) over 3300
R = 81.93 metres

The Correct answer to this question for Penn Foster Students is: 81.94m

A car speeds up from rest to +16 m/ s in 4s. calculate the acceleration

Answers


The magnitude of acceleration is (change in speed) / (time for the change).

Change in speed = (speed at the end) - (speed at the beginning) =

                                   (16 m/s)  -  (0)  =  16 m/s .

Time for the change  =  4 s .

Magnitude of acceleration = (16 m/s) / (4 s) = 4 m/s per sec = 4 m/s² .
16 m/s - 0 m/s divided by 4s
= 16 m/s divided by 4s
= 4 m/s
The acceleration is 4 m/s squared

In a given circuit, the supplied voltage is 1.5 volts. One resistor is 3 ohms and the other is 2 ohms. Use Ohm's law to determine the current in the circuit. 0.3 amps 1.5 amps 7.5 amps 3.3 amps The purpose of a fuse or circuit breaker is _____. to speed up the current to slow down the current to stop current that is flowing too fast to stop current that is flowing too slow

Answers



Part #1:
You haven't mentioned whether the resistors are in series
or in parallel.  It's going to make a difference.

-- If the resistors are in series, then their net effective resistance
is their sum.

           (3 ohms) + (2 ohms) = 5 ohms.

Current in the circuit is

                      (supply voltage) / (total resistance)

                 =            (1.5 volts) / (5 ohms) = 0.3 ampere . 


-- If the resistors are in parallel, then their net effective resistance
   is   
                   (their product) / (their sum)

        = (1 ohms x 2 ohms) / (1 ohm + 2 ohms)

        =              (2 ohms²) / (3 ohms)  =  2/3 ohm .

Current in the circuit is

                      (supply voltage) / (total resistance)
          
                 =   (1.5 volts) / (2/3 ohm)  =  1.0 ampere .

I guess your resistors are in series, because 0.3 amp
is one of the choices but 1.0 amp isn't.
______________________________________

Part #2.
When it comes to talking about electric current, the terms
"speed up", "slow down", "fast", and "slow" are somewhere
between meaningless and absurd.

The purpose of a fuse or circuit breaker is to shut down a current
that is too great ... too great a magnitude, too many electrons all
trying to crowd their way through the wire at the same time, like
100 lines of ants all carrying bread crumbs through a straw and
back to their hole, when there was only supposed to be one or
two lines.

Speed has nothing to do with it.  All electric currents flow through
wires at the same speed, at least in high school.  It's a matter of
Amperes, which has nothing to do with speed.

What is a normal force?

Answers

is the component perpendicular to the surface on contact  of the  contact force  

what is conduction, convection and infrared radiation in relation to heat transfers?

Answers

Conduction . . . . .
You put a spoon into a cup of really hot coffee.  After a couple of minutes,
the top of the spoon is too hot to handle.  The spoon CONDUCTED the heat
from the hot liquid up to the other end. 
No material moved. The heat just flowed through the material.

Convection . . . . .
You put a pot of cold water on the stove and turn on the heat.  The flame
heats the water at the bottom of the pot.  The heated water rises from the
bottom, and cold water from the top sinks to the bottom.  Hot fluid rising,
cold fluid sinking, that's CONVECTION.
Material moved, carrying heat from place to place with it.

Radiation . . . . .
-- You come into the house on a cold day, and there's a fireplace burning
across the room.  Looking at the fire, you feel heat on your face, but not on
your back, and the room is still cold.
-- The sun produces a lot of heat. Somehow, it gets to the Earth, although
there's nothing in space to carry it.
-- Heat, light, and radio don't need anything to carry them. They can RADIATE
through empty space, as electromagnetic waves.
When the waves are heat, they're called Infrared waves.
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