Can you see an apple in the dark?

Answers

Answer 1

Answer: No. Because the color of the apple is red.

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What chromosomes are found in body cells but not sex cells

Which is true about carbon-12 compared with carbon-13

Answers

e mass number of any given atom depends solely on the number of protons and neutrons in its nucleus. The mass number of any atom can be determined by adding the number of protons and neutrons. (Mathematically this is stated as Mass Number = Protons + Neutrons). For instance, a Carbon atom with 6 protons and 6 neutrons will have a mass number of 12AMU. However, a Carbon atom with 6 protons and 8 Neutrons will have a mass number of 14AMU. They are both Carbon atoms, however they each have a different mass number. Atoms of the same element that have different numbers of neutrons, and therefore, different mass numbers, are called isotopes. Isotopic symbols are used to indicate isotopes of the same elements. In the following isotopic symbols the lower number is the atomic number…it is the number of protons. The upper number is the mass number, it represents to sum of the protons and neutrons in the atoms nucleus.

I don't understand these following questions, can someone please help me?1) find the work done by a 25 N force applied for 6 meters
2) calculate the potential energy of a 5 kg object sitting on a 3 m ledge
3) a rock is at the top of a 20 meter tall hill, the rock has a mass of 10 kg. how much potential energy does it have?

Answers

These questions are testing to see if you know
the formulas for work and potential energy ... or
if you know where to find them when you need them.

1). The formula for work is:

   Work = (force) x (distance) .

In this question: Work = (25 N) x (6 m) = 160 joules .
_____________________________

The formula for potential energy is

   PE = (mass) x (gravity) x (height) .

On Earth, gravity = 9.8 m/s²

This information gives you both of the other questions.

#2). PE = (mass) x (gravity) x (height)

       = (5 kg) x (9.8 m/s²) x (3m) = 147 joules

#3). PE = (mass) x (gravity) x (height)

       = (10 kg) x (9.8 m/s²) x (20 m) = 1,960 joules

A skateboarder traveling at 4.45 m/s can be stopped by a strong force in 1.82 s and by a weak force in 5.34 s.The mass of the skateboarder and the skateboard is 53.6 kg.

What is the impulse on the skateboarder?
What is the average force on the skateboarder in each of these stops?

Answers

1) Impulse: $-238.5 kg m/s$

2) Strong force: -131.1 N, weak force: -44.7 N

Explanation:

The impulse exerted on an object is equal to the change in momentum of the object itself.

Mathematically:

$I=\Delta p=m(v-u)$

where

m is the mass of the object

u is the initial velocity

v is the final velocity

For the skateboarder in this problem, we have:

m = 53.6 kg

u = 4.45 m/s

v = 0 (it comes to a stop)

Therefore, the impulse is

$I=(53.6)(0-4.45)=-238.5 kg m/s$

Where the negative sign indicates that the direction is opposite to the motion of the object.

The impulse is also equal to the product between the force applied and the duration of the collision:

$I=F\Delta t$

where

I is the impulse

F is the average force

$\Delta t$ is the time during which the force is applied

The strong force is applied in a time of

$\Delta t = 1.82 s$

Therefore this force is

$F=(I)/(\Delta t)=(-238.5)/(1.82)=-131.1 N$

The weak force is applied in a time of

$\Delta t = 5.34 s$

So this force is

$F=(I)/(\Delta t)=(-238.5)/(5.34)=-44.7 N$

Learn more about impulse:

brainly.com/question/9484203

#LearnwithBrainly

Choose all the answers that apply. In pea plants, round seeds are dominant over wrinkled seeds. If two hybrids (Rr) are crossed: 50 percent will be Rr
25 percent will have round seeds
25 percent will have wrinkled seeds
1/4 will have round seeds
3/4 will have the same phenotype

I REALLY NEED HELP PLEASE

Answers

50 percent will be Rr

25 percent will have wrinkled seeds

The following information should be considered:

In the case when there is peaplants, roundseeds are dominant over wrinkled seeds.
So at the time of two hybrids are crossed so there should be 50% as Rr and 25% should be wrinkled seeds.

learn more: brainly.com/question/18269454?referrer=searchResults

Correct answers:

50 percent will be Rr
25 percent will have wrinkled seeds

| R | r
----------------
R | RR| Rr
---|------------
r | Rr | rr

Light travels fastest when moving through

Answers

a vaccum unlike sound,light can travel through any matter including a great vacuum of nothing (space)

A living thing is called?

Answers

The most scientific word I can think of is an organism.

A living thing is known as an organism, and is also called a biotic factor within an ecosystem. Nonliving things are known as abiotic, or without life :)

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Water Cycle: As _________ get too heavy to hold the liquid, the liquid droplets fall back to Earth.