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WINSTONCH [101]
3 years ago
6

suppose a block of lead of mass 0.4kg at temperature of 95°C is dropped in a 2 kg of water originally at 20°C in a container. wh

at is the final temperature if no heat is lost to the container and the environment. ( Specif heat of lead is 128J/Kg°C and and specific heat of water is4184J/Kg°C​
Physics
1 answer:
Kipish [7]3 years ago
8 0
Kg kg kg kg kg gram kg kg kg kg kg
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A soccer ball with a mass of 0.434 kg approaches a player horizontally with a speed of 13.0 m/s. The player kicks the ball with
zaharov [31]

Answer:

a) 15.49

b) Opposite to the ball's initial velocity

c) 258.16N

Explanation:

a)

\Delta p=m \Delta v\\\\\Delta p= (0.434)(13.0-(-22.7)) \\\\\Delta p=(0.434)(35.7)\approx 15.49 kg \cdot m/s

b)

Since the player is kicking the ball in the opposite direction to which it came, the impulse is being directed opposite to the ball's initial velocity.

c)

\Delta p= F \Delta t \\\\\\F=\dfrac{\Delta p}{\Delta t} \\\\\\F=\dfrac{15.49 kg \cdot m/s}{0.06 s}\approx 258.16N

Hope this helps!

7 0
3 years ago
A truck of mass 500kg moving at 4m/s collides with another truck of mass 1500kg moving in the same direction at 2m/s. What is th
VMariaS [17]

Answer:

m1u1+m2u2=(m1+m2)v.

500×4+1500×2=(500+1500)V.

2000+3000=2000V.

5000=2000V.

V=2.5m/s

8 0
3 years ago
a hammer is swung so it exerts a 400 N force on a nail. if the hammer and nail are in contact for 0.35 seconds how much impulse
Anuta_ua [19.1K]

Answer:

140Ns

Explanation:

From Newton's 2nd law of motion

F = ma

F = m∆v/t

==> Ft = m∆v

impulse = Ft = 400 × 0.35 = 140Ns

8 0
3 years ago
How do people in your community deal with loud sound​
Anna35 [415]

Answer: Nothing they mind thier own business instead of being really noisy.

Explanation

Now if someone was screaming they probley would go investagate investigate but something else nah.

8 0
3 years ago
Which of the following planets has the highest surface temperature as compared to the others? Earth Jupiter Mars Venus
bearhunter [10]

The answer is Venus. Being the second planet from the sun, the surface temperature on Venus (864° - 872°F) is enough to melt lead.

8 0
3 years ago
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