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3 years ago

11

True or false

2 answers:

IRINA_888 [86]3 years ago

5 0

Answer:

1: false

2:true

Explanation:

number one is false because the upper mantle is known as asthenosphere.

number two is true because at convergent plate boundaries, where two continental plates collide earthquakes are deep and also very powerful. In general, the deepest and the most powerful earthquakes occur at plate collision (or subduction) zones at convergent plate boundaries.

Rainbow [258]3 years ago

3 0

Answer:

false and true is the correct answer

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Please select the word from the list that best fits the definition a puffy white cloud with a flat bottom

ankoles [38]

Cumulus? They are fluffy clouds that have flat bottoms. Is this what you need?

3 0

4 years ago

How does planting high yield crop varieties make farming more sustainable

lakkis [162]

Answer:

The more high yield crops are planted, the more production there will be from plants.

Explanation:

High-yield plants are plants that are genetically modified or modified artificially in a way that makes farming plants more efficient. More crops grow, therefore more money.

The answer is, the more high-yield plants there are, the more efficiency there will be from farming.

5 0

4 years ago

A positive charge of 18nC is evenly distributed along a straight rod of length 4.0 m that is bent into a circular arc with a rad

sergey [27]

Explanation:

Formula for angle subtended at the center of the circular arc is as follows.

$\theta = \frac{S}{r}$

where, S = length of the rod

r = radius

Putting the given values into the above formula as follows.

$\theta = \frac{S}{r}$

= $\frac{4}{2}$

= $2 radians (\frac{180^{o}}{\pi})$

= $114.64^{o}$

Now, we will calculate the charge density as follows.

$\lambda = \frac{Q}{L}$

= $\frac{18 \times 10^{-9} C}{4 m}$

= $4.5 \times 10^{-9} C/m$

Now, at the center of arc we will calculate the electric field as follows.

E = $\frac{2k \lambda Sin (\frac{\theta}{2})}{r}$

= $\frac{2(9 \times 10^{9} Nm^{2}/C^{2})(4.5 \times 10^{-9}) Sin (\frac{114.64^{o}}{2})}{2 m}$

= 34.08 N/C

Thus, we can conclude that the magnitude of the electric eld at the center of curvature of the arc is 34.08 N/C.

5 0

3 years ago

A race car is one lap behind the lead race car when the lead car has 44 laps to go in a race. If the speed of the lead car is 55

masha68 [24]

Answer:

Speed of second car will be 57.17 m/sec

Explanation:

We have given lead car travels = 44 laps

1 laps = 1.34 km = 1340 m

So total distance = 1340×44 = 58960 m

Speed of lead car = 55.9 m/sec

We know that $time=\frac{distance}{speed}=\frac{58960}{55.9}=1054.74sec$

As the second car is 1 lap behind so distance traveled by second car = 45×1340 = 60300 m

So speed of second car will be $speed=\frac{distance}{time }=\frac{60300}{1054.74}=57.17m/sec$

3 0

3 years ago

A sample of iron receives 50.J of heat energy that raises the temperature of the iron

tatiyna

Answer: 0.02kg

Explanation:

The quantity of heat energy (Q) required to heat a substance depends on its Mass (M), specific heat capacity (C) and change in temperature (Φ)

Thus, Q = MCΦ

Since,

Q = 50 joules

Mass of iron sample = ? (let unknown value be Z)

C = 100 J/kg°C

Φ = 25°C

Then, Q = MCΦ

50J = Z x 100 J/kg°C x 25°C

50J = 2500J/kg x Z

Z = (50J/2500J/kg)

Z = 0.02kg

Thus, the mass of the iron sample is 0.02kg

6 0

4 years ago