Which of the following planets orbits the fastest around the sun?

An object is moving at a constant velocity of 4 m/s. What is it's initial velocity?

AysviL [449]

Answer:

How does sperm cells get out of the genitals of the male's? What produces the sperms? Why does women have to hope on the genitals?

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Explanation:

4 0

3 years ago

The data in the table above show how far

Taya2010 [7]

Answer:c

Explanation: because if you work it in a paper it should like lil wit is straight the numbers are going up by 16

6 0

2 years ago

A solid sphere of mass 8.6 kg, made of metal whose density is 3,400 kg/, hangs by a cord. When the sphere is immersed in a liqui

creativ13 [48]

Answer:

A. $1900 kg/m^3$

Explanation:

We are given that

$m=8.6 kg$

Density, $\rho_s=3400 kg/m^3$

Tension,T=38 N

We have to find the density of liquid.

$T=mg-\rho_l Vg$

$g=9.8 m/s^2$

Volume,V= $\frac{m}{\rho_s}$

$38=8.6\times 9.8-\rho_l\times \frac{8.6}{3400}\times 9.8$

$\rho_l\times \frac{8.6}{3400}\times 9.8=8.6\times 9.8-38$

$\rho_l=\frac{(8.6\times 9.8-38)\times 3400}{8.6\times 9.8}$

$\rho_l=1867kg/m^3\approx 1900 kg/m^3$

Option A is true.

4 0

3 years ago

At t = 0, a car registers at 30 miles/hr. Forty seconds later, the car’s velocity is now at 50 miles/hr. Assuming constant accel

madreJ [45]

Answer: Choice A) 0.44 miles

=================================================

Work Shown:

1 hour = 60 minutes

1 minute = 60 seconds

1 hour = 60*60 = 3600 seconds

40 seconds = 40*(1/3600) = 40/3600 = 1/90 hours

The car travels 1/90 of an hour. Let t = 1/90.

The initial velocity is vi = 30 mph.

The final velocity is vf = 50 mph.

Apply one of the kinematics equations as given below.

x = distance traveled

x = 0.5*(vi+vf)*t

x = 0.5*(30+50)*(1/90)

x = 0.44444444444444 which is approximate

x = 0.44

The car traveled roughly 0.44 miles. This matches with choice A.

I'm assuming choice A is supposed to say 0.44 instead of 0.442; otherwise, I think your teacher made a typo by putting that 2 in there. Each of the other answer choices are accurate to 2 decimal places, so it would make sense that choice A is also accurate to 2 decimal places as well.

If 0.442 was intended by your teacher, and it's not a typo, then the answer would be E) None of the choices given.

8 0

3 years ago

if only conductive heat loss was significant for a house then by what percentage would you lower the heat loss fi the temp was r

Maslowich

I think the conductive heat loss is proportional to the DIFFERENCE
between the inside and outside temperatures. In other words, if it's the
same temperature inside and outside, then no matter what that temperature
is, no heat flows through the walls of the house in either direction.

You said it's 20° outside, and you turn the thermostat down from 70° to 60°.
So you'd be reducing the DIFFERENCE between the inside and outside
temperatures from 50° to 40°.

From 50 to 40 is a decrease of (10/50) = 20%. So your heat loss ... and
the amount that gets added to your heating bill ... becomes 20% less for
each hour that the inside and outside temperatures stay like this.

7 0

2 years ago