1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Sergio [31]
2 years ago
7

PLEASE HELP ASAP!!!!!!!1

Physics
1 answer:
ArbitrLikvidat [17]2 years ago
7 0

Age of dino: Mesozoic era

End of earth a dessert: End of the Mesozoic

a layer: Paleozoic

You might be interested in
If the N pole of a magnet is brought near to an unmagnetized iron, nail, then the nail becomes​
Andreyy89

Answer:

The nail also magnatized .

5 0
2 years ago
Match the terms to the correct descriptions. Question 1 options:
faust18 [17]
1) Refraction
2)Reflection
3)Concave
4)Convex

I took the test and got this right so you can believe me :)
Hope this helps
4 0
3 years ago
Read 2 more answers
A closed system’s internal energy changes by 178 J as a result of being heated with 658 J of energy.
statuscvo [17]
Internal energy of the system changes by ΔE = 178 J.
Heat given to the system = Q = +658 J.

According to the first law of thermodynamics, 
ΔE = Q + W
178 = 658 + W 
∴ W = 178-658 = -480 J

Minus sign indicates that work is done by the system. 
7 0
3 years ago
Read 2 more answers
La tensión en newtons necesaria para que una onda transversal cuya longitud de onda es 3.33 cm vibre a razón de 625 ciclos por s
NemiM [27]

Answer:

9.34 N

Explanation:

First of all, we can calculate the speed of the wave in the string. This is given by the wave equation:

v=f \lambda

where

f is the frequency of the wave

\lambda is the wavelength

For the waves in this string we have:

f=625 Hz, since it completes 625 cycles per second

\lambda=3.33 cm = 0.033 m is the wavelength

So the speed of the wave is

v=(625)(0.0333)=20.6 m/s

The speed of the waves in a string is related to the tension in the string by

v=\sqrt{\frac{T}{\mu}} (1)

where

T is the tension in the string

\mu=\frac{m}{L} is the linear density

In this problem:

m=16.5 g = 16.5\cdot 10^{-3} kg is the mass of the string

L = 0.75 m is the its length

Solving the equation (1) for T, we find the tension:

T=\mu v^2 = \frac{m}{L} v^2 = \frac{16.5\cdot 10^{-3}}{0.75}(20.6)^2=9.34 N

8 0
3 years ago
A sound wave with a frequency of 400 Hz is moving through a solid object. If the wavelength of the sound wave is 8 m, what is th
Paraphin [41]

Answer:

v = 3200 m/s

Explanation:

As we know that the frequency of the sound wave is given as

f = 400 Hz

wavelength of the sound wave is given as

\lambda = 8 m

so now we have

speed = wavelength \times frequency

so we will have

v = (8m) \times (400 Hz)

v = 3200 m/s

4 0
3 years ago
Other questions:
  • One horsepower (1 hp) is the unit of power based on the work that a horse can do in one second. This is defined, in English unit
    12·1 answer
  • You are fixing the roof of your house when a hammer breaks loose and slides down. The roof makes an angle of 65o∘ with the horiz
    6·1 answer
  • Which statement is not true?
    13·2 answers
  • Please help me find out this answer
    7·1 answer
  • Can some help me pliz ​
    9·1 answer
  • PLLLLLLLLLLZ HELP The virtual image of a lens is always on the same side of the lens as the object.
    6·1 answer
  • At which position does the diver have the most gravitational potential energy
    11·2 answers
  • Which of these statements best represents the law of conservation of energy
    14·1 answer
  • The physical quantity represented as rate of change of change in position in a
    12·1 answer
  • This is actually Earth Science
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!