4 years ago

If a skateboarder is moving at 4 meters per second then changes its velocity to 10

Physics

1 answer:

trapecia [35]4 years ago

4 0

Answer:

i was doing this is it actually 0.6

Explanation:

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Sunlight is made up of EM waves. True or False

GrogVix [38]

Answer:

true

Explanation:

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3 years ago

Is there a definite end to our atmosphere?

Irina18 [472]

There is no definite end to earths atmosphere, but technically the border between the outer space and earth gets thinner as you move up from the earths surface. The Karman line is the closest definition there is which describes the end of the earth's atmosphere, it is 100 km above earth's sea level at approximately 1.56 % of total earth's radius. This describes the boundary between the outer space and the atmosphere.

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3 years ago

An isotope has a half-life of 25 days. If you start with 50 grams, how much of the substance

a_sh-v [17]

Answer:

12.5

Explanation:

If the half life is 25 days then in 50 days it will half twice

50/2=25

25/2=12.5

4 0

3 years ago

A square coil, enclosing an area with sides 3.2 cm long, is wrapped with 2,720 turns of wire. A uniform magnetic field perpendic

marishachu [46]

Answer

$\epsilon = -0.74\ V$

Explanation:

given,

Side of square coil = 3.2 cm

Number of turns = 2720

magnetic field in the coil increases to = 0.45 T

time interval = 1.7 s

average induced voltage in the coil = ?

length = 0.032 m

Area = 0.032² = 0.001024 m²

induced voltage

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

$\epsilon = -2720 \times 0.001024 \times \dfrac{0.45}{1.7}$

$\epsilon = -0.74\ V$

The average voltage induced in the coil is equal to $\epsilon = -0.74\ V$

3 0

3 years ago

A 200-kg boulder has 39,200 joules of gravitational potential energy. What height is it at?

ruslelena [56]

Answer:

20 m

Explanation:

P.E=mgh

h=P.E/mg

h=39200/(200*9.8)

h= 20 meters.

6 0

3 years ago