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3 years ago

A 90 kg body is taken to a planet where the acceleration due to

Physics

1 answer:

yawa3891 [41]3 years ago

6 0

Answer:

225 kg.

Explanation:

Since the gravity is 2.5 times than that of the Earth, g on that planet = (10 * 2.5) m/s = 25 m/s.

Hence, the weight of the body would be (90 * 2.5) kg, aka 225 kg.

Hope this helped!

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An oxygen atom can absorb any frequency of light to cause its electrons to increase in energy.

sashaice [31]

Answer:

that's true.

Explanation:

that's the reason why oxygen supports burning.

8 0

2 years ago

Larger animals use proportionately less energy than smaller animals; that is, it takes less energy per kg to power an elephant t

marin [14]

Answer:

Part a)

$Q = 952 cal/day$

Part b)

$P = 46 Watt$

Part c)

$\Delta P = 54 W$

Explanation:

As we know that 5000 kg African elephant requires 70,000 Cal for basic needs per day

so we will have

$m = 5000 kg$

$Q = 70,000 Cal$

so we have energy required per kg

$E = \frac{70,000}{5000}$

$E = 14 cal/kg$

Part a)

now we know that per kg the energy required will be same

so we have mass of the human is 68 kg

so energy required per day is given as

$Q = 68 \times 14$

$Q = 952 cal/day$

Part b)

Resting power is the rate of energy in Joule required per sec

so it is given as

$P = \frac{952 \times 4186}{24\times 3600}$

$P = 46 Watt$

Part c)

resting power given in the book is

$P' = 100 W$

so this is less than the power given

$\Delta P = 100 - 46$

$\Delta P = 54 W$

6 0

3 years ago

A 45-gram object that has a volume of 9 mL has a density of

yanalaym [24]

Answer:

<h2> The answer is </h2><h2>a. 5g/mL</h2>

Explanation:

Given data

mass m= 45g

volume v= 9mL

we know that density=m/v

substituting our given data we have

$density=\frac{45}{9} =5g/mL$

What is Density?

The Density of a body can be defined as the ratio of mass to volume,

Density, mass of a unit volume of a material substance. The formula for density is $Density= \frac{mass}{volume}$ ,

where d is density,

M is mass, and

V is volume.

Density is commonly expressed in units of grams per cubic centimetre.

7 0

3 years ago

Nuclear power doesn't directly emit greenhouse gases, but it does leave behind dangerous nuclear _______.

Morgarella [4.7K]

Answer:

radioactive waste?

Explanation:

6 0

3 years ago

If predators a and b prey upon the same species and predator a is eliminated

marysya [2.9K]

I would think Predator B would get more food from the species since Predator A was Eliminated.

For Example: if two dogs want the same bowl of food, they are going to fight or try and beat one another to it. So if Predator A is gone then Predator B has the species all to himself unsless another Predator comes.

Hope this helped!!

4 0

3 years ago