3 years ago

Use the periodic table to answer the question

Physics

2 answers:

True [87]3 years ago

8 0

Answer: I hope this helps you

Explanation:

Free_Kalibri [48]3 years ago

6 0

Answer:

B. Rubidium has more protons and more electrons than calcium.

Explanation:

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The parents of a new baby believe they brought the wrong child home from the hospital. Gel electrophoresis was performed using D

polet [3.4K]

Would you be able to post the gel electrophoresis results?

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3 years ago

Write an equation for the nth term of the arithmetic sequence: 64, 78, 92, 106, ...

Anna [14]

If 64 is term #1 of the sequence,
then the general term is
<em> T(n) = 50 + 14n </em>.

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4 years ago

A vertical wall (8.7 m x 3.2 m) in a house faces due east. A uniform electric field has a magnitude of 210 N/C. This field is pa

Dominik [7]

Answer:

$\phi=4344.72Nm^2/c$

Explanation:

From the question we are told that:

Dimension of Wall:

$(L*B)=(8.7 m * 3.2 m)$

Electric field $B=210 N/C$

Angle $\theta =42 \textdegree North$

Generally the equation for electric Flux is mathematically given by

$\phi=EAcos\theta$

$\phi=210*(8.7*3.2)*cos 42$

$\phi=4344.72Nm^2/c$

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3 years ago

You compress a spring by a certain distance. then you decide to compress it further so that its elastic potential energy increas

Likurg_2 [28]

Elastic potential energy = 1/2 k * change of x^2
k- coefficient
x - change in length.
to increase energy 1.5 times you have to change x (compress) into $\sqrt{1.5}$ times (it's abot 1.22 or 22%)

5 0

4 years ago

A 7.7 kg sphere makes a perfectly inelastic collision with a second sphere initially at rest. The composite system moves with a

klemol [59]

Answer:

15.4 kg.

Explanation:

From the law of conservation of momentum,

Total momentum before collision = Total momentum after collision

mu+m'u' = V(m+m').................... Equation 1

Where m = mass of the first sphere, m' = mass of the second sphere, u = initial velocity of the first sphere, u' = initial velocity of the second sphere, V = common velocity of both sphere.

Given: m = 7.7 kg, u' = 0 m/s (at rest)

Let: u = x m/s, and V = 1/3x m/s

Substitute into equation 1

7.7(x)+m'(0) = 1/3x(7.7+m')

7.7x = 1/3x(7.7+m')

7.7 = 1/3(7.7+m')

23.1 = 7.7+m'

m' = 23.1-7.7

m' = 15.4 kg.

Hence the mass of the second sphere = 15.4 kg

7 0

3 years ago

Read 2 more answers