# 6 physics short questions

*label*Physics

*timer*Asked: Nov 5th, 2015

**Question description**

**deadline is 6 hour budget is $15 i need answer with complete details how you get answer**

**1-A 20 g
piece of metal has a temperature of 100 C. It is quickly placed in 100 g of
water at 20 C. The final temperature of the metal and water is 30 C. What is
the specific heat of the metal?**

A- 0.19 cal/g C

B- 0.22 cal/g C

C- 0.57 cal/g C

D- 0.71 cal/g C

How can I solve it?

**2-
How much heat is required to completely convert 300 g of ice initial at 0 C to
steam at 100 C?**

Show the work

3-
**A 2000 kg car, traveling at 30 m/s, is brought to a complete stop applying the
brakes. How much heat is generated in this process?**

A- 3.6 kcal

B- 15 kcal

C- 215 kcal

D- 72 kcal

How can solve it

4- **What is the wavelength
of a sound wave with a frequency of 1500 Hz if the speed of sound is 340 m/s? **

Show the work

5- **A tuning fork vibrating
with frequency of 440 Hz produces a fundamental standing sound wave in a pipe
closed at one end. If the speed of sound in air is 330 m/s, what is the length
of the pipe?**

Show work

6- **A typical candy bar has
240 dietary calories. If all of the energy from a candy bar were transferred to
ice at 0 C, how much ice (i.e. how many grams) could be melted to from water at
0 C? **