3 years ago

Define relative velocity with an example. A man is going

Physics

1 answer:

makkiz [27]3 years ago

6 0

Answer:

4.24m/s,45 degrees in forward direction

Explanation:

You might be interested in

Fill in the blanks. Beats only occur when the frequency of two objects is _________________ and when those objects are made to _

Iteru [2.4K]

Beats only occur when the frequency of two objects is interfere with one another and when those objects are made to identical amplitudes together.

3 0

3 years ago

An AC voltage source and a resistor are connected in series to make up a simple AC circuit. If the source voltage is given by ΔV

ra1l [238]

Answer:

t = 5.48 × 10⁻³ s

Explanation:

Given:

ΔV = ΔVmax × sin(2πft)

frequency, f = 16.9Hz

thus,

ΔV = ΔVmax × sin(2π×16.9×ft)

Now,

Let 'R' be the resistance

Also according to the ohms law

i = V/R

where,

i = current

V = voltage

hence,

$i=\frac{\Delta V_{max}sin(2\pi \times 16.9\times t)}{R}$

also, given at time 't' the current in the circuit is 55.0% of the peak current

thus

$i=\frac{55}{100}\times \frac{\Delta V_{max}}{R}=0.55\times \frac{\Delta V_{max}}{R}$

thus,

$0.55\times \frac{\Delta V_{max}}{R}=\frac{\Delta V_{max}sin(2\pi \times 16.9\times t)}{R}$

$0.55=sin(2\pi \times 16.9\times t)}$

$0.5823=(2\pi \times 16.9\times t)}$

t = 5.48 × 10⁻³ s (Answer)

8 0

3 years ago

True or False: A change of 1 pH unit represents a tenfold change in the acidity of the solution.

alisha [4.7K]

Answer:

I was also going to ask same question edited:ok i found its true

7 0

3 years ago

Name the instrument used to control current in an electric circuit. Guys please help me

Delvig [45]

The instrument which is used to control current in an electric circuit is rheostat. 

Hope this helps :)

8 0

3 years ago

Can you make predictions about the Moon's appearance?

Digiron [165]

Answer:

answer: no

Explanation:

5 0

3 years ago