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Alex
2 years ago
6

I need help algebra in physics

Physics
1 answer:
Tom [10]2 years ago
8 0

Answer:

A: 0.26

Explanation:

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A car travels 45 km north. It then turns around and travels 30 km south. What is the car's displacement?
natka813 [3]
If the ration supplementary angle is 11:7,find the measure of the larger angle larger angle?
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3 years ago
Waves with higher amplitude transfer ____energy.
natali 33 [55]

Answer:

- Waves with higher amplitude transfer HIGHER energy.

- Waves with higher frequency transfer HIGHER energy.

3 0
3 years ago
A ball is thrown at an angle of to the ground. If the ball lands 90 m away, what was the initial speed of the ball?
andre [41]

Answer:

The initial speed of the ball is 30 m/s.

Explanation:

It can be assumed that the ball is thrown at an angle of 45 degrees to the ground. The ball lands 90 m away. We need to find the initial speed of the ball. We know that the horizontal distance covered by the projectile is called its range. It is given by :

R=\dfrac{u^2\ sin2\theta}{g}

u is the initial speed of the ball.

v=\sqrt{\dfrac{Rg}{sin2\theta}}

v=\sqrt{\dfrac{90\times 9.8}{sin2(45)}}

v = 29.69 m/s

or

v = 30 m/s

So, the initial speed of the ball is 30 m/s. Hence, this is the required solution.                                      

8 0
4 years ago
How can a rocket be propelled forward in space where there is no air to push<br> against?
pychu [463]

Answer:

Explanation:

In space, rockets zoom around with no air to push against. ... When a rocket shoots fuel out one end, this propels the rocket forward — no air is required. NASA says this principle is easy to observe on Earth. If you stand on a skateboard and throw a bowling ball forward, that force will push you and the skateboard back.

3 0
3 years ago
: Consider a transformer used to recharge rechargeable flashlight batteries, that has 500 turns in its primary coil, 4 turns in
Aneli [31]

Answer:

a) 096V  b) 0.0288A  c) 0.3456W

Explanation:

a) Vp/Vs= Np/Ns

 120/Vs= 500/4

Vs= 096V

b) Np/Ns= Is/Ip

500/4= 3.6/Ip

Ip= 0.0288A

c) P= VI

P=(120)(0.0288)

P= 0.3456W

8 0
3 years ago
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