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Temka [501]
3 years ago
7

Plss help im taking a quiz thx!!!

Physics
2 answers:
Iteru [2.4K]3 years ago
6 0

Answer:

David

Explanation:

Because he is not on the ride with Ben and Justine

ch4aika [34]3 years ago
6 0

Answer:c David

Explanation:

While the other are moving at a constant and David is standing still both of the two on the ride see each other as fixed points and the candy as well. Where David sees the other two moving in relation to his fixed point

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A 1000 Kg car traveling at 10 m/s hits the back of a 5000 Kg truck
insens350 [35]

Answer:

0 m/s

The car becomes stationary

Explanation:

The law of conservation of linear momentum states that the sum of inital and final momentum should be equal and expressed as

m_cu_c+m_tu_t=m_cv_c+m_tv_t

Where m represent the mass, u and v are tge initial and final velocities while subscripts c and t represent car and truck.

Taking forward direction as positive then considering that the truck is originally at rest, we substitute original truck velocity with 0, mass of car and truck with 1000 kg and 5000 kg respectively then final truck velocity as 2 m/s as we take initial car velocity to be 10 m/s

1000*10+(5000*0)=5000*2+1000v

1000v=0

V=0

Therefore, the car finally becomes stationary.

8 0
2 years ago
Question 17 of 25
crimeas [40]

Answer:

D

Explanation:

heat is an energy that transfers from a hot body to cold body

4 0
2 years ago
Radio stations use electromagnetic waves for broadcasting. The chart shows different frequencies of waves used by radio stations
nlexa [21]
Radio Station W as the slower the frequency the longer the wave length
6 0
2 years ago
Read 2 more answers
Please help me it's URGENT (#10 btw and also how do I solve for time​
Afina-wow [57]

Answer:

t = 12s

Explanation:

Given:

v-initial = 0 m/s

x = 360 m

a = 5.0 m/s^2

Solve:

x = (v-initial)t + 1/2(a*t^2)

360 = 0t + 1/2 (5.0t^2)

360 = 2.5 t^2

144 = t^2

t = sqrt(144) = 12

Therefore, it takes 12 seconds.

5 0
2 years ago
Why do you not come to thermal equilibrium on a cold day
Tju [1.3M]

Two physical systems are in thermal equilibrium if no heat flows between them when they are connected by a path permeable to heat. Thermal equilibrium obeys the zeroth law of thermodynamics. A system is said to be in thermal equilibrium with itself if the temperature within the system is spatially and temporally uniform.

Systems in thermodynamic equilibrium are always in thermal equilibrium, but the converse is not always true. If the connection between the systems allows transfer of energy as heat but does not allow transfer of matter or transfer of energy as work, the two systems may reach thermal equilibrium without reaching thermodynamic equilibrium.

3 0
3 years ago
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