PHYSICS HIGH SCHOOL

In a series circuit, if one of the bulbs blew out, the other bulb woulda. not be able to light up.
b. stay lit but be very dim.
c. stay lit in the same way.
d. stay lit and be twice as bright as when both bulbs were lit.

Answers

Answer 1
Answer: In a series circuit, there is only ONE path for current to take,
so the current for ALL bulbs must flow through EVERY bulb. 
If one bulb burns out or gets removed from a series circuit,
none of the other ones can light up.  (a).

Strings of Christmas tree lights used to be wired in series.
This was a total bummer ... If ONE tiny bulb burned out,
than ALL of them would go dark, AND there was no easy
way to figure out exactly which one burned out, so the
whole string would usually get thrown away..

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How much force is needed to accelerate a 68 kilogram-skier at a rate of 1.2 m/sec^2?

Answers

Answer: Force = 81.6 N

Explanation:
According to Newton's Second law:
F = ma --- (1)

Where F = Force = ?
m = Mass = 68 kg
a = Acceleration = 1.2 m/s^2

Plug in the values in (1):
(1) => F = 68 * 1.2
F = 81.6 N (The force needed to accelerate the skier at a rate of 1.2 m/s^2)

Answer:

The force needed to accelerate a 68 kilogram-skier at a rate of 1.2ms2 is 81.6 Net forces

Explanation:

QUESTIONS When parking uphill in a car with a manual transmission, you should park with the transmission in A: Neutral. B: Any gear. C: First gear.

Answers

Answer:

option C first gear

Explanation:

we know car is parking in uphill

so is we park park on neutral it will free move that is damage car

so we park car on uphill in first gear and turn wheel away from kerb

and park car on downhill in reverse gear and turn wheel toward kerb

so any gear may be reverse or first

so correct option is C first gear

What is a Vector and a scalar?

Answers

Scalars are quantities that are fully described by a magnitude (or numerical value) alone.
Vectors are quantities that are fully described by both a magnitude and a direction.

Which of these statements about resistance is true? Choose the best answer.A. The greater the resistance, the easier it is for electricity to flow
B. The greater the resistance, the less thermal energy is produce.
C. The greater the resistance, the more electrical energy is produced.
D. The greater the resistance, the more electrical energy is produced.

Answers


'C' and 'D' are the same statement, and none of the 3 choices
is good.

Electrical energy is produced in a generator, a solar panel, or
a battery, not in things with resistance.

From the generator or battery, current flows through a circuit of
one or more components.

The greater the resistance of a component, the more energy is
LOST as the current flows through it.  The component dissipates
the energy in the form of heat.


This question is not worded in the best possible manner, nor is it specific enough. I also notice that C and D are duplicates.
The answer is B.

A is not true because regarding Ohm's law, V = IR, where V=voltage, I=current, and R=resistance. If we hold Voltage as a constant, (which should be mentioned in the question if it was any good) than we can easily notice that (V)/(R) = I, where I represents current. The larger I is, the easier for electricity to flow. Clearly as resistance increases, current decreases, therefore A is not true.

B is true because of the same reason C (and D) is not true: the greater the resistance, the more power it creates. Again, holding Voltage, or V, as constant, the equation for finding the power (electrical power/energy) of a system is (V^2)/(R) = P. We can notice here again that the greater R is, the less P is. The larger P is, the more energy is dissipated by the circuit. Therefore, since R is getting larger, P is getting smaller, and the amount of heat dissipated becomes less with R's increase.

C and D are not true because of what I explained in B, P gets smaller with R's increase.

Energy of a wave is measured in terms of the wave's ?

Answers

Answer: amplitude

Explanation: amplitude is a important measurement, it tells us how much energy a wave is carrying

Energy refers to the speed.So u use the formula speed=wavelength×frequency

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Answers

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