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vlabodo [156]
3 years ago
13

2. Each cart below is pushed across a room with the same amount of force. Which cart will result in the greatest change in speed

?
A )A 15 kg cart being pushed with a 200 N force
B ) A25 kg box being pushed with a 200 N force
C )A 45 kg cart being pushed with a 200 N force
D )A 35 kg box being pushed with a 200 N force​
Chemistry
1 answer:
Tanya [424]3 years ago
4 0

Answer: A 15 kg cart being pushed with a 200 N force.

Explanation:

The 15 kg cart is the lightest, so it has the least amount of friction on the ground.

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Answer:

The specific heat capacity of quartz is 0.71 J/g°C.

Explanation:

Heat lost by quartz will be equal to heat gained by the water

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Mass of quartz= m_1=51.9 g

Specific heat capacity of quartz= c_1=?

Initial temperature of the quartz= T_1=97.8^oC

Final temperature = T_2=T  = 19.3^oC

Q_1=m_1c_1\times (T-T_1)

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Specific heat capacity of water= c_2=4.18 J/g^oC

Initial temperature of the water = T_3=17.0 ^oC

Final temperature of water = T_2=T=19.3^oC

Q_2=m_2c_2\times (T-T_3)

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On substituting all values:

-(51.9 gc_1\times (19.3^oC-97.8^oC))=300.0 g\times 4.18 J/g^oC\times (19.3^oC-170^oC)

we get:

c_1 =0.7079 J/g^oC\approx 0.71 J/g^oC

The specific heat capacity of quartz is 0.71 J/g°C.

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