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nignag [31]
3 years ago
14

Please help me ASAP!!

Physics
2 answers:
aniked [119]3 years ago
7 0

Answer:

the ball lose kentic energy and gains potential energy rolling upward

Nataly [62]3 years ago
7 0

Answer:

c

Explanation:

when a ball is rolling down it loses potential and gains kinetic, but in this case since the ball is going upwards it is losing kinetic energy and gaining potentail like a roller coaser

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___________ is used mainly in submarines that remain underwater
marusya05 [52]

Answer: Your correct main answer is a submarine

Explanation:

Submarines are usually used for underwater warfare, and naval submarines are equipped with torpedoes, missiles, and high-powered nuclear weapons. The use of these along with their advanced tracking system helps to target ships and boats from below as well as other enemies. They can also work on targets that are on land.

Pls mark me brainiest

7 0
2 years ago
Read 2 more answers
A car company is testing seatbelts using crash test dummies. The company finds that when cars come to a sudden stop, the crash t
professor190 [17]

Answer: Because of Inertia

Explanation: According to Newton first law, that a body in a linear motion will continue to be in motion except an external for act on it

But also, a body in motion will always like to continue in motion and have a reluctance tendency to stop because of inertia.

the crash test dummies' bodies will continue to move forward even though the car stopped because of inertia.

6 0
3 years ago
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A stone was dropped off a cliff and hit the ground with a speed of 88 ft/s . What is the height of the cliff? (Use 32 ft/s 2 for
bulgar [2K]

To solve this problem we will apply the linear motion kinematic equations, which describe the change in velocity, depending on the acceleration and the distance traveled, that is,

v_f^2 = v_i^2 +2ah

Where,

v_f= Final Velocity

v_i = Initial Velocity

a = Acceleration

h = height

Our values are given as,

v_f = 88 ft/s\\v_i = 0 ft /s\\a = 32 ft/s^2\\

Replacing we have,

vf^2 = vi^2 + 2*a*h

88^2 = 0 + 2*32*h

h= 121 ft

Therefore the height of the cliff is 121ft

5 0
4 years ago
a magnet has a 20 cm magnetic field if a piece of metal is 18 cm from the magnet will it be attracted or not
mina [271]

Answer:

yes

Explanation:

The metal is closer than 20 cm to the magnet which is in the magnetic field.

4 0
3 years ago
A train station bell gives off a fundamental tone of 500 Hz as the train approaches the station at a speed of 20 m/s. If the spe
Brut [27]

Answer: 529.9 Hz

Explanation:

Here we need to use the Doppler equation, so we have:

f' = f*(v + v0)/(v - vs)

Here, f is the frequency = 500Hz

v is the velocity of the wave, = 334m/s

v0 is the velocity of the observer = 20m/s

vs is the velocity of the source = 0m/s

Then we have:

f' = 500Hz*(334m/s + 20m/s)/(334m/s) = 529.9 Hz

8 0
3 years ago
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