2 years ago

Which energy transfer occurs when a cube of ice is placed in a glass of water?

1 answer:

5 0

Acetic acid is a weak acid and sodium hydroxide is strong base. Salts of the two will hydrolyse to give basic solution. So, at neutral point, pH of the solution will be greater than 8.

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To practice Problem-Solving Strategy 7.2 Problems Using Mechanical Energy II. The Great Sandini is a 60.0-kg circus performer wh

sp2606 [1]

Answer:

$v = 15.45 m/s$

Explanation:

As per mechanical energy conservation we can say that here since friction is present in the barrel so we will have

Work done by friction force = Loss in mechanical energy

so we will have

$W_f = (U_i + K_i) - (U_f + K_f)$

here we know that

$W_f = F_f . d$

$W_f = 40 \times 4$

$W_f = 160 J$

Initial compression in the spring is given as

$F = kx$

$4400 = 1100 x$

$x = 4 m$

now from above equation

$W_f = (\frac{1}{2}kx^2 + 0) - (mgh + \frac{1}{2}mv^2)$

$160 = (\frac{1}{2}1100(4^2) + 0) - (60 \times 9.8\times 2.50 + \frac{1}{2}(60)v^2)$

$160 = 8800 - 1470 - 30 v^2$

$v = 15.45 m/s$

3 0

3 years ago

What type of heat transfer is used in a restaurant that uses ovens with fans inside?

Marina CMI [18]

convection

please mark brainliest any other problems or questions feel free to ask

5 0

2 years ago

Scientists believe Earth is about how many billion years old

ehidna [41]

The earth is 4.54 billion years old.

7 0

2 years ago

Read 2 more answers

Seen through a traditional optical telescope, the space between stars and galaxies is pitch black. But, with a radio telescope,

Gemiola [76]

That's the Cosmic Microwave Background (CMB). (D)

It doesn't "provide evidence for the ... Theory". The Big Bang theory is the best explanation (so far) for the CMB and a lot of other observations.

Evidence isn't used to prove theories. Theories are attempts to explain evidence.

8 0

3 years ago

Two parallel copper rods supply power to a high-energy experiment, carrying the same current in opposite directions. The rods ar

mart [117]

Answer:

the maximum allowable current is 7302.967 amperl

Explanation:

The computation of the maximum allowable current is shown below;

Force F = mean ÷ 4π 2 I_1 I_2 ÷d × ΔL

200 N = (10)^-7 (2I × I) ÷ 0.08 × 1.5

200 = 3.75 × 10^-6 I^2

I = √200 ÷ √ 3.75 × 10^-6

= 7302.967 amperl

Hence, the maximum allowable current is 7302.967 amperl

Basically we applied the above formula

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2 years ago