PHYSICS HIGH SCHOOL

An object moving in a circle at a constant speed is accelerating. Why?A. because it is going faster
B. because it has constant velocity
C. because its direction is changing
D. because the distance it is traveling is changing

Answers

Answer 1
Answer:
"Acceleration" does NOT mean 'speeding up'.  It means any change
in the speed or direction of motion ... speeding up, slowing down, or
moving in a curve.

An object moving in a circle at a constant speed is accelerating, because
when you're moving along a circle, your direction is constantly changing.
Answer 2
Answer:

A. Because it is going faster.

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If vx = 0.40 meters/second and vy = 3.00 meters/second, what is the value of θ?

Answers

θ  is the angle whose tangent is  3/0.4 = arctan (7.5) = 82.4°

(That's the angle above the horizontal.  If that doesn't match
the  θ  in your diagram, too bad !  For some strange reason,
I wasn't able to see your diagram.)

Which of the following best defines the science of separating color wavelengths?a. spectroscopy
b. color-detection
c. photo-chemistry
d. spectrophotometry

Answers

Answer: spectroscopy

Spectroscopy is the separation of the light in the different wavelengths and spectrophotometry measures the intensities of the different components of the light to get the composition of substances.

Answer:

A

Explanation:

I took the test :)

If you squeeze the bottom of a closed tube of toothpaste, the pressure is increased ____.

Answers

The cap will pop of,THE SEAL WILL BREAK, or the tube will explode.
The cap will pop off and it may fly or hurt somebody.

A child on a spinning playground ride is 0.36 m from the center of the ride. The centripetal force on the child is 19 N. What is the mass of the child if the child has a tangential speed of 0.54 m/s?

Answers

Any motion in a curved path represents accelerated motion, and requires a force directed toward the center of curvature of the path. This force is called the centripetal force which means "center seeking" force. The force has the magnitude

F = mv^2 / r

Where f is the centripetal force

M is the mass

V is the velocity

R is the radius

 

19 N = m ( 0.54 m/s)^2 / 0.36 m

Solving for m

M = 23.5 kg

Answer:

23

Explanation:

An earthquake creates a type of wave that shakes the ground. If a large earthquake occurs in Greece, how can the waves be felt across the sea in Italy?

Answers

If a large earthquake occurs in Greece, the waves be felt across the sea in Italy because both of these locations are on top of the same tectonic plate, which shifts during the quake.

What happens to the magnetic domains in a material when the material is placed in a strong magnetic field? Please help and thank you!

Answers

if it is diamagnetic then it magnetise opposite to magnetic field
if paramagnetic it weekly magnetise in direction of magnetic field
if ferromagnetic it strongly magnetise in direction of magnetic field
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