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3 years ago

What is the period of 60.0 hz electrical power?

Physics

1 answer:

Anarel [89]3 years ago

8 0

Answer:

0.017 s

Explanation:

The period of a periodic signal is defined as the reciprocal of the frequency:

$T=\frac{1}{f}$

where

T is the period

f is the frequency

For the electrical power, the frequency is

f = 60.0 Hz

Substituting into the previous equation, we find the period:

$T=\frac{1}{60.0 Hz}=0.017 s$

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A weather balloon is inflated to a volume of 26.8 LL at a pressure of 744 mmHgmmHg and a temperature of 31.2 ∘C∘C. The balloon r

elena-s [515]

Answer:

43.96 L

Explanation:

We are given that

$V_1=26.8 L$

$P_1=744mm Hg$

$T_1=31.2^{\circ} C=31.2+273=304.2K$

$P_2=385mmHg$

$T_2=-14.8^{\circ}=273-14.8=258.2K$

We know that

$\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}$

$V_2=\frac{P_1V_1T_2}{P_2T_1}$

Substitute the values

$V_2=\frac{744\times 26.8\times 258.2}{385\times 304.2}$

$V_2=43.96 L$

Hence, the volume of balloon at -14.8 degree Celsius=43.96 L

5 0

3 years ago

What is the equivalent resistance of a circuit that contains three 10.0 12

lana66690 [7]

Answer:

Explanation:

The equivalent resistance for three resistors connected in parallel is given as

(1/R)=(1/R₁)+(1/R₂)+(1/R₃)

now we.need to.insert the value of 3 resistances but only 2 are given in the question.

3 0

3 years ago

Read 2 more answers

RP 1 - Specific Heat Capacity GCSE Exam Questions (B.S.G)

Stels [109]

When the temperature of 0.50 kg of water decreases by 22 °C, the energy transferred to the surroundings from the water is -46.2 kJ.

A sample of 0.50 kg of water boils (reaches 100 °C). After a while, its temperature decreases by 22 °C.

We can calculate the energy transferred to the surroundings from the water in the form of heat (Q) using the following expression.

$Q = c \times m \times \Delta T = \frac{4200J}{kg.\° C} \times 0.50kg \times (-22\° C) \times \frac{1kJ}{1000J} = -46.2 kJ$

where,

c: specific heat capacity of water
m: mass of water
ΔT: change in the temperature

When the temperature of 0.50 kg of water decreases by 22 °C, the energy transferred to the surroundings from the water is -46.2 kJ.

Learn more: brainly.com/question/16104165

8 0

2 years ago

If a man does 4500 J of work from a high rise building of 10 m, what is his mass?

GalinKa [24]

Explanation:

The potential energy (Ep) = 4500 J

Ep = m. g. h

=> m = Ep/(g.h)

m = 4500/(10×10)

= 4500/100

= 45

so, the mass = 45 kgs

4 0

3 years ago

Read 2 more answers

Consider the following situation, in which a compass is influenced by not only the force of Earth's magnetic field, but also an

DochEvi [55]

Answer:

1) The angle of deflection will be less than 45° ( C )

2) The angle of deflection will be greater than 45° but less than 90° ( E )

Explanation:

1) Assuming that the force applied has a direction which is perpendicular to the Earth's magnetic field

∴ Fearth > Fapplied hence the angle of deflection will be < 45°

2) when the Fearth < Fapplied

the angle of deflection will be : > 45° but < 90°

6 0

3 years ago