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Alex777 [14]
3 years ago
5

the weightlessness that an astronaut feels in space is due to increased air resistance A. True B. False

Physics
1 answer:
mariarad [96]3 years ago
8 0
False, it's due to the absence of gravity.
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Lena is playing with a remote-controlled car in her backyard. She knows that the car uses a wheel and axle to move. What is the
melomori [17]

Answer:

C. chemical energy from the batteries

Explanation:

Remote-controlled car or commonly called RC cars are toy vehicles that are controlled or propelled to move from a distance by a wire-connected remote that sends radiowaves to the receiver. According to this question involving the remote-controlled car Lena is playing with, a transmitter from the remote propels the wheel and axle to make the car move.

The car contains a battery cell that uses it's chemical energy as a source of power for the wheel and axle system. Hence, the chemical energy from the batteries of a remote-controlled car powers the wheel and axle to make the car move.

7 0
3 years ago
Wave energy can only be transmitted through a material medium. wave energy can only be transmitted through a material medium.
S_A_V [24]
The correct answer is False.
In fact, electromagnetic waves (which carry energy), do not need a material medium to travel, because they can travel in vacuum as well. So, wave energy can be transmitted also through vacuum.
3 0
3 years ago
A typical carbon atom has six protons, six neutrons, and six electrons. Which of these has the least amount of mass?
Butoxors [25]

One proton or one neutron have very close to the same mass.

Their mass is about the same as the mass of 1,840 electrons !
So six electrons have roughly the same mass as 0.0033 of one
proton or one neutron.

Yes, these masses are very tiny.  None of them was ever measured
until the 20th Century.  But all of them have now been measured,
very precisely and accurately.  This is very impressive, and should
give us a lot of admiration for scientists of the past hundred years.
It would be very interesting to look around online and find out
how they did it.

6 0
3 years ago
Is diet Pepsi heterogeneous or is it homogeneous
Lana71 [14]
Heterogeneous because it has less amount of sugar than the regular Pepsi has
6 0
3 years ago
Read 2 more answers
. A grindstone increases in angular speed from 4.00 rad/s to 12.00 rad/s in 4.00 s. Through what angle does it turn during that
ZanzabumX [31]

Answer:

\theta=32rad

Explanation:

In an uniformly accelerated circular motion, the angle traveled by the object is given by:

\theta=\frac{\omega_f+\omega_0}{2}t

Here \omega_f is the final angular speed, \omega_0 is the initial angular speed and t is the time of the motion. Replacing the given values:

\theta=\frac{12\frac{rad}{s}+4\frac{rad}{s}}{2}(4s)\\\theta=32rad

5 0
4 years ago
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