Speed equals distance divided by? <br> a. time<br> b. velocity<br> c. size<br> d. motion

In middle ages people believed that abnormal behavior was cause by ?

Svetach [21]

C, they didn't know any better

8 0

3 years ago

Read 2 more answers

What is the speed of a wave that has a frequency of 25Hz and a wavelength of 3m

Arada [10]

The answer to the question is:

75m/s

Just do 25*3

4 0

2 years ago

Five identical quintuplets leave earth when they reach the age of 21, in the year 2121. Each quintuplet goes on a spaceship jour

Elena-2011 [213]

Answer:

Explanation:

This is a problem based on time dilation , a theory given by Albert Einstein .

The formula of time dilation is as follows .

t₁ = $\frac{t}{\sqrt{1-\frac{v^2}{c^2} } }$

t is time measured on the earth and t₁ is time measured by man on ship .

A ) Given t = 20 years , t₁ = ? v = .4c

$\frac{20}{\sqrt{1-\frac{.16c^2}{c^2} } }$

=1.09 x 20

t₁= 21.82 years

B ) Given t = 5 years , t₁ = ? v = .2c

$\frac{5}{\sqrt{1-\frac{.04c^2}{c^2} } }$

=1.02 x 5

t₁= 5.1 years

C ) Given t = 10 years , t₁ = ? v = .8c

$\frac{10}{\sqrt{1-\frac{.64c^2}{c^2} } }$

=1.67 x 10

t₁= 16.7 years

D ) Given t = 10 years , t₁ = ? v = .4c

$\frac{10}{\sqrt{1-\frac{.16c^2}{c^2} } }$

=1.09 x 10

t₁= 10.9 years

E ) Given t = 20 years , t₁ = ? v = .8c

$\frac{20}{\sqrt{1-\frac{.64c^2}{c^2} } }$

=1.67 x 20

t₁= 33.4 years

7 0

2 years ago

Write a scientific explanation to describe where earthquakes and volcanoes most commonly occur and their relation to plate bound

vovangra [49]

Earthquakes and volcanoes most commonly occur around plate boundaries because of the movement from the plate boundaries. The interactions between the plates by moving under, upon, or sliding against other boundaries may cause earthquakes and volcanoes.

4 0

2 years ago

Cross section of a solid circular rod is subject to a torque of t = 2.7 kn⋅m . if the diameter of the rod is d = 8 cm , what is

polet [3.4K]

Shear Stress= Force along the tangent/ Area
= 2700/π*r^2
=2700/3.14*16
=54

3 0

2 years ago

Speed equals distance divided by? a. time b. velocity c. size d. motion