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madam [21]
4 years ago
15

PLEASE ANSWER List: What are the three types of joints in the human body?

Physics
1 answer:
horsena [70]4 years ago
4 0
1.Synovial joint
2. pivot joint
3. Hinge joint
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A railroad car of 2000 kg coasting at 3.0 m/s overtakes and locks with an identical car coasting on the same track in the same d
serg [7]
The key is in "they lock together". This tells you this is a complete inelastic collision and therefore you can use the formula:
m1*v1+m2*v2=v(m1+m2)
Plug in numbers:
2000*3+2000*2=v(2000+2000)
so v=2 m/s, obviously in the same direction of motion in which they were both moving.
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4 years ago
Give one real-life example of the Doppler Effect and explain what causes this phenomenon. Please write at least 3 complete sente
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Dipper effect of an oncoming train get louder as it approaches and sound diminishes as it goes away sound traveling
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3 years ago
A linear accelerator uses alternating electric fields to accelerate electrons to close to the speed of light. A small number of
diamong [38]

Answer:i

9E13 ELECTRONS

Explanation:

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7 0
3 years ago
42,43 and 44 please
Mariana [72]
42) The sailboat travels east with velocity v_e=30 mph, while the current moves south with speed v_s=30 mph. Since the two velocities are perpendicular to each other, he resultant velocity will be given by the Pytagorean theorem:
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and the direction is in between the two original directions, therefore south-east. So, the correct answer is
D) 42 mph southeast

43) Since the light moves by uniform motion, we can calculate the distance corresponding to one light year by using the basic relationship between velocity, space and time. In fact, we know the velocity:
v=300,000,000 m/s=3 \cdot 10^8 m/s
and the time is one year, corresponding to:
t=32,000,000 s=3.2 \cdot 10^7 s
therefore, the distance corresponding to one light year is:
S=vt=(3\cdot 10^8 m/s)(3.2 \cdot 10^7 s)=9.6 \cdot 10^{15}m
Therefore, the correct answer is D.

44) For the purpose of the problem, we can assume that the light travels instantaneously from the flash to us (because the distances involved are very small), so the time between the flash and the thunder corresponds to the time it took for the sound to travel to us.
The speed of sound is
v=1100 ft/s=750 mph=335 m/s
And since the time between the flash and the thunder is t=3 s, the distance is
S=vt=(335 m/s)(3 s)=1005 m=0.62 miles
Therefore, the correct answer is A) 3/5 mile.
6 0
3 years ago
A land breeze usually originates during the _____.
Nadusha1986 [10]
<span>evening and flows toward the water</span>
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3 years ago
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