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Natasha2012 [34]
3 years ago
14

Which of the following information does the electromagnetic spectrum tell us?

Physics
2 answers:
Elodia [21]3 years ago
8 0
A: the wavelength of a wave
OLga [1]3 years ago
4 0
The answer is A your welcome !
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Two objects (38.0 and 17.0 kg) are connected by a massless string that passes over a massless, frictionless pulley. The pulley h
fgiga [73]

Answer:

a) 3.7 m/s^2

b) 231.8 N

Explanation:

Let m1 be mass of the first object (m1 = 38.0 kg) and let m2 be the mass of the second object (m2 = 17.0 kg ). Let a be the acceleration of the two objects. Let F1 be the force of gravity exerted on m1 and F2 be the force of gravity exerted on m2. Let M = m1 +m2

a)

F1 = m1g and F2 = m2g

So Fnet = F1 + F2

Since the pulleys will move in different directions when accelerating...

Fnet = F1 - F2

M×a = m1g - mg2

M×a = g×(m1 -m2)

a = g×(m1 - m2)/M

a = 9.8×(38 - 17)/(38 + 17)

a = 3.7 m/s^2

b)

Looking at the part for m2

Fnet  = T - m2g

-m2×a = T - m2g

T = m2(g - a)

T = 231.8 N

7 0
3 years ago
A rock falls off a cliff. How fast will it be going after falling for 4.33 seconds?
bixtya [17]

Answer:42.43m/s

Explanation:According to vf=vi+at, we  can calculate it since v0 equals to 0. vf=0+9.8m/s^2*4.33s= 42.434m/s

4 0
1 year ago
Which two things determine an objects monentrum
maria [59]
Momentum (in terms of classical mechanics) is defined as p = m*v, where m is the mass and v is the velocity.
8 0
4 years ago
Read 2 more answers
What does the big bang theory suggest
Alika [10]

Answer:

The Big Bang Theory is the leading explanation about how the universe began. At its simplest, it says the universe as we know it started with a small singularity, then inflated over the next 13.8 billion years to the cosmos that we know today.

Explanation: Hope this help! :)

7 0
3 years ago
Two power lines, each 290 m in length, run parallel to each other with a separation of 23 cm. If the lines carry parallel curren
GREYUIT [131]

To solve this problem we will apply the concepts related to the Magnetic Force, which is defined as the product between the currents multiplied by the length where they are transmitted and inversely proportional to the distance that separates them, considering between them, the costs indicated below . We will simply replace the values and obtain the desired value,

F = \frac{\mu_0 I_1I_2 l }{2\pi d}

Here,

\mu_0 = Permeability of free space

I_{1,2} = Current at each state

l = Length

d = Distance of separation

Replacing with our values we have that the force is,

F = \frac{(4\pi *10^{-7})(120)(120)(290)}{2\pi (0.23)}

F = 3.63N

Therefore the magnitude of the force is 3.63N, and  if the currents are in same direction then force is attractive, while if the currents are in opposite direction then force is repulsive ( force is same).

3 0
3 years ago
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