All categories

3 years ago

Becky has a younger sister. If the sister was half Becky's age when Becky was 6, and Becky is now 70, how old is Becky's sister?

Physics

2 answers:

rjkz [21]3 years ago

8 0

Answer:

Explanation:

nikdorinn [45]3 years ago

8 0

Answer:

Explanation:

It's a trick question!

Because the younger sister was half the age of Becky when she was 6. She also has to be half the age of Becky today.

So, 70 ÷ 2 = 35

Hope this helps you out! : )

You might be interested in

the pressure difference between an oil and water pipe is measured by double fluid manometer as shown in figure below for the giv

Ahat [919]

The answer above me is correct

8 0

3 years ago

The component of the external magnetic field along the central axis of a 78-turn circular coil of radius 34.0 cm decreases from

grigory [225]

Answer:

Induced current, I = 18.88 A

Explanation:

It is given that,

Number of turns, N = 78

Radius of the circular coil, r = 34 cm = 0.34 m

Magnetic field changes from 2.4 T to 0.4 T in 2 s.

Resistance of the coil, R = 1.5 ohms

We need to find the magnitude of the induced current in the coil. The induced emf is given by :

$\epsilon=-N\dfrac{d\phi}{dt}$

Where

$\dfrac{d\phi}{dt}$ is the rate of change of magnetic flux,

And $\phi=BA$

$\epsilon=-NA\dfrac{dB}{dt}$

$\epsilon=-78\times \pi (0.34)^2\dfrac{(0.4-2.4)}{2}$

$\epsilon=28.32\ V$

Using Ohm's law, $\epsilon=I\times R$

Induced current, $I=\dfrac{\epsilon}{R}$

$I=\dfrac{28.32}{1.5}$

I = 18.88 A

So, the magnitude of the induced current in the coil is 18.88 A. Hence, this is the required solution.

5 0

2 years ago

The needle in the following diagram rotates around a fixed point in the middle. Based on the information given, what way will th

Ronch [10]

Answer:

nods 40th anniversary rid off e 49en9 snns

3 0

3 years ago

What happens to the mass and volume if density increases

nikitadnepr [17]

They all stay the same regardless

7 0

3 years ago

What is the difference in the positioning of the Sun, Earth and moon for a lunar eclipse versus a full moon?

Lady bird [3.3K]

When the Moon passes between Sun and Earth, the lunar shadow is seen as a solar eclipse on Earth. When Earth passes directly between Sun and Moon, its shadow creates a lunar eclipse. Lunar eclipses can only happen when the Moon is opposite the Sun in the sky, a monthly occurrence we know as a full Moon.

3 0

3 years ago