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Elena-2011 [213]
3 years ago
7

HELP PLEASE!!!!!!!!!!

Biology
2 answers:
bija089 [108]3 years ago
8 0

Answer:

130 s or 2 min and 10 sec

Explanation:

x \:  = vt

260 = 2t

t = 130 sec

vfiekz [6]3 years ago
5 0

Answer:

2 min 10 s

Explanation:

Simply use unitary method.

Spiderman flies 2km in 1s.

For 1km, its 1/2 s.

For 260 km, it takes 1/2 *260 s

=130 s

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When the source of a wave is moving relative to an observer of the wave, which of the following is true?
galina1969 [7]

Answer:

Observers ahead of the wave observe an apparent increase in wave frequency  

Explanation:

This is the Doppler Effect. The frequency of a wave increases when the source approaches the observer and decreases as the source recedes.

B, C, and D are wrong. Observers behind the source notice a decrease in frequency.

4 0
3 years ago
What is Mary and Jim’s hypothesis?
elena55 [62]

Answer:

In this case, the scientist want to test the presence of the limonite in the yellow rocks, So, proposed hypothesis should include the color of rock they want to observe and the posssible outcome, which need to be tested. So, a proposed hypothesis can be: The rocks, which have yellow color are made up of mineral lime.

8 0
3 years ago
Suppose you have an X ray of an arm, which is taken because the doctor suspects a bone is broken. You also have a drawing showin
Vesnalui [34]

Answer:

An X-ray is done to diagnose the position of bones in the body whether its broken or not or in right place or not.

An X-ray machine is turned on to provide a visual of the bones showing bone condition. When the machine is turned on, X-ray travel through the body tissues, and due to the presence of calcium in bones, they absorb more X-rays, thus bones appear white against the black background of a radiograph.

These white bones on the radiograph will show the position of bones whether it's broken or not.

So, both the visuals that is X-ray and drawing showing visuals (the bones appear white) contribute valuable data to the given situation.

5 0
3 years ago
Explain how the process of meiosis relates to the way in which a child
prisoha [69]
Meiosis is a process where a single cell divides twice to produce four cells containing half the original amount of genetic information. That means that they will never be a copy of their parents because of their different genetic material. Characteristics, such as eye color, hair type and color, the shapes of facial features, and height and build, and attribute the combinations of these to the portions of DNA inherited from each parent which makes them different but still carry the DNA of their parents.
8 0
3 years ago
What can you determine about mechanical energy from this graph?​
Pachacha [2.7K]

Answer:

What can be determined from the graph includes;

a) The Mechanical Energy M.E. = 1.0

b) The initial K.E. =  1.0, The initial P.E. = 0

c) The period for the kinetic energy = The period for the potential energy = 0.25

d) The frequency of oscillation of the kinetic and potential energy = 4 Hz

e) The object starts with its maximum velocity

Explanation:

The equation between kinetic energy, K.E., potential energy, P.E. and total mechanical energy, M.E. is given as follows;

M.E. = K.E. + P.E. = Constant

From the graph, we  have;

a) M.E. = K.E. + P.E. = 1.0

b) At time t = 0,

The initial K.E. = M.E. = 1.0, P.E. = 0

At time t = 0.125,

P.E. = M.E. = 1.0, K.E. = 0

c) The period for the kinetic energy, K.E. = The period for the potential energy, P.E. = 0.25

d) The frequency of oscillation of K.E. and P.E. = 1/T = 1/0.25 = 4 Hz

e) The object starts in motion with maximum velocity at time t = 0.

7 0
3 years ago
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