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2 years ago

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Ball 1, with a mass of 100 g and traveling at 10 m/s, collides head-on with ball 2, which has a mass of 300 g and is initially a

t rest. What are the final velocities of each ball if the collision is (a) perfectly elastic

1 answer:

qaws [65]2 years ago

5 0

There is 4000 balls in the earth of the world why is that so hard for you

You might be interested in

the shock absorbers in a car act as a big spring with k= 21900 N/m. when a 92.5 kg person gets in, how far does the spring stret

r-ruslan [8.4K]

Answer: 0.04139m

Explanation:

First, we need to calculate the weight of the man which will be:

Weight = mass × acceleration due to gravity

Weight = mg

Weight = 92.5 × 9.8

Weight = 906.5N

Then, we calculate the force which will be:

F = kx

mg = kx

x = mg/k

x = 906.5/21900

x = 0.04139m.

The spring stretched for 0.04139m.

4 0

3 years ago

In air, the 57 GHz radio wave has a shorter<br> wavelength compared to the 64 GHz radio wave.

dalvyx [7]

Answer:

False

Explanation:

Higher frequency signals have shorter wavelengths. Hence, the 64 GHz signal will have a shorter wavelength than the 57 GHz signal.

Frequency and wavelength are inversely proportional meaning as frequency increases wavelength decreases and as frequency decreases wavelength increases.

Cheers.

6 0

3 years ago

Holden is trying to determine the velocity of his race car. He went 20 meters east, turned around, and went 40 meters west. He t

kotegsom [21]

(15 meters east) / (5 sec) = 3 meters/ sec east

3 0

3 years ago

Read 2 more answers

Cross product and its properties

bearhunter [10]

The length of the cross product of two vectors

The scalar triple product of the vectors a, b, and c

The volume of the parallelepiped determined by the vectors a, b, and c is the magnitude of their scalar triple product.

<u>Explanation</u>:

The length of the cross product of two vectors is | a $\times$ b | = |a| |b| sin θ

The length of the cross product of two vectors is equal to the area of the parallelogram determined by the two vectors (see figure below).

Anticommutativity:

| a $\times$ b | = - | b $\times$ a |

Multiplication by scalars:

(ca) $\times$ b = c (a $\times$ b) = a $\times$ (cb)

Distributivity:

a $\times$ (b + c) = (a $\times$ b) + (a $\times$ c)

The scalar triple product of the vectors a, b, and c:

a . (b $\times$ c) = (a $\times$ b) . c

The magnitude of the scalar triple product is the volume of the parallelepiped of the vectors a, b, and c.

The vector triple product of the vectors a, b, and c is given as

a $\times$ (b $\times$ c) = (a.c) b - (a.b) $\times$ c

4 0

3 years ago

Which scientist(s) discovered the basis for the base-pair rule, which states that the amounts of adenine and thymine match, as d

Nadusha1986 [10]

Answer:

Erwin Chargaff.

Explanation:

Rule of Chargaff was that any cell organism from the DNA should maintain a ratio of 1:1, this ratio rule is called base pair rule.

And this ratio is maintain between pyrimidine and purine bases and the amount of cytosine should be equal to guanine and also the amount of thymine should be equal to adenine.

Both type of DNA strands show this pattern and this rule was discovered by a chemist who belong to Austria, named was Erwin Chargaff.

6 0

3 years ago