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iren [92.7K]
3 years ago
10

What are the 3 units we use to measure the universe??

Physics
1 answer:
ioda3 years ago
6 0
If you mean what types of measurements are used to measure in outer space, I believe it’s light-year, astronomical unit and intergalactic measurements, but I’m not completely sure.

Hopefully this helps...
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. A student times a car traveling a distance of 2 m. She finds that it takes the car 5 s to
AveGali [126]
No, the car travels 1 metre in 5s at the start which is 0.2m/s, while the second meter it travels one metre in 8 seconds which is 0.125 m/s, the speed changes therefore it is not constant during the two metres the car travels
3 0
3 years ago
The scalar product of two vectors 2N,4N is 4 angle between them
Angelina_Jolie [31]

Answer:

60°

Explanation:

The scalar product of two vectors with an angle ∅ between them is defined as:

\overrightarrow{a}\cdot \overrightarrow{b}=|a||b|cos\phi

Solving for angle ∅:

\phi= cos^{-1}(\frac{\overrightarrow{a}\cdot \overrightarrow{b}}{|a||b|})=cos^{-1}(\frac{4}{8})

7 0
3 years ago
Paula has walked in a straight line, 30.5° north of west, for 1650 meters. How far south and east should she walks to return to
olchik [2.2K]
The answer is A.
Sy = 1650 x sin30.5 = 837.4 m toward south
Sx = 1650 x cos30.5 = 1421.7 m toward east
8 0
3 years ago
A child weighs 300 N. What is the child's mass
vekshin1
Weight / g = mass 300N/9.8m/s^2= mass 30.6kg
3 0
3 years ago
- A 9,300 kg. railroad car traveling at a velocity of 15m/s strikes a second boxcar
VARVARA [1.3K]

Answer:

13950kg

Explanation:

If we make the system both railroad cars, we know that the momentum of the whole system doesn't change because the forces are internal.

Let a be the mass of the second car.

The original momentum is 9300*15 kg*m/s+ a*0 kg*m/s = 139500 kg*m/s

After sticking together, the momentum is (9300+a)kg*6m/s, which should be equal to 139500 kg*m/s

Therefore (9300+a)*6 = 139500

9300+a = 23250

a = 13950 kg

5 0
3 years ago
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