Is burning wood endothermic or Exothermic

Answers

Answer 1

Answer: i think it is exothermic

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an apple in a tree has a gravitational potential energy of 175J and a mass of 0.36g . how high from the ground is the apple
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What are the problems with monoculture farming?

Answers

One pest or disease can wipe out the whole crop population. Leading to lower yields.

A gyre is a set of currents that form:a. a line
b. a loop
c. weather
d. climate zones

Answers

A gyre is a set of currents that form b. a loop. The circulation of gyres are affected by global wind patterns, landmasses, and the planet's rotation. The circulation is also affected by temperature, as warm water goes up and cold water sinks. There are five major gyres in the world: North Atlantic, South Atlantic, Indian, North Pacific, and South Pacific.

Answer:

The answer is B. a loop hopefully this helps!

Planets in our solar system revolve around the Sun because A.
the Sun is the hottest object in our solar system.
B.
the Sun is the brightest object in our solar system.
C.
the Sun is the most massive object in our solar system.
D.
the Sun is the slowest object in our solar system

Answers

C. The sun is the most massive object in our solar system.
It also has a stronger gravitational pull.

C. is the answer i think i searched it.

A photon with a wavelength of 2.29 × 10^–7 meter strikes a mercury atom in the ground state.Calculate the energy, in joules, of this photon. [Show all work, including the equation and
substitution with units.]

Answers

Answer:

Energy of photon, $E=8.64* 10^(-19)\ J$

Explanation:

It is given that,

Wavelength of photon, $\lambda=2.29* 10^(-7)\ m$

It strikes a mercury atom in the ground state. We have to find the energy of this photon. It can be calculated using below relation as :

$E=(hc)/(\lambda)$

Where

h is the Planck's constant

c is the speed of light

So, $E=(6.6* 10^(-34)\ J-s* 3* 10^8\ m/s)/(2.29* 10^(-7)\ m)$

$E=8.64* 10^(-19)\ J$

Hence, the above value is the energy of this photon.

detailed solution is attached

Which is larger, 65mph or 120kph? As a percentage, how much faster is one than the other?

Answers

120 kilometers is equivalent to 74.565 miles,
or 14.71% greater than 65 miles.

65 mph is 104.6067 kph that means that 120 kph is bigger than 65 mph.
104.6067 kph x 115% = 120.3 kph (rounded)
120 kph is 115% faster than 65 mph.

Bena thinks that dissolving more salt in water causes the mixture’s freezing temperature to change. Which is the best type of scientific investigation for Bena to use to study this?

Answers

Entropy and the Second Law of Thermodynamics.
Dissolving salt in water lowers the temperature at which the water freezes, or at which the ice melts.

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