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A hot (70 degrees Celcius) lump of metal has a mass of 250 gm and a specific heat of 0.25 cal/gm-degrees Celcius. John drops the metal into a 500 gm calorimeter containing 75g of water at 20 degrees celcius. The calorimeter is constructed of a material that has a specific heat of 0.10 cal/gm-Degrees Celcius. Once the combination of metal, calorimeter and water reach equilibrium, what will be the final temperature?

Help me solve x and y

Two coins rotate on a turntable. coin B is twice as far from the axis as coin A. What is the angular velocity of coin B?

1. Twice as the angular velocity of A

2. Same as the angular velocity of A

3. Square of the angular velocity of A

4. None of these

The specific heat of a metal can be determined by measuring the temperature change that occurs when a heated piece of metal is placed in an insulated ccontainer made of the same material and containing water. The piece of metal has a mass of 100g and is initially at 100 degrees Celcius. The container has a mass of 200g and contains 500g of water at an initial temperature of 20 degrees Celcius. The final temperature is 21.8 degrees Celcius. What is the specific heat of the metal?

25 *25=?

15*15=?

16*16=?

What is the length of three springs connected in series and parallel? Change in length of the spring is 4cm.

1. (a) How many ohms are there in a 7.85-megohm resistor?

A hollow nickel-steel shaft, whose outside diameter is twice the inside diameter, is to transmit 1492KW at 220 rpm. The shaft is subjected essentially to torsion. Assuming an allowable shear stress of 224Ma, determine the size of the hollow shaft required.  

Equal amounts of energy are added to equal masses of twodifferent metals. The first metal experiences a temperature changeof ΔT₁.

Derive an equation for the temperature increase of the secondmetal compared with the temperature increase of the firstmetal.

A certain amount of heat added to 65 grams of lead causes atemperature change of 15 degrees celsius. Calculate the temperaturechange when the same amount of energy is added to 65 grams ofcopper.

Which of the following unit is Newton?

(A) force

(B) Displacement

(C) distance

(D) energy

Which Metal is in liquid state at room temperature?

Which object has the maximum momentum?

1. A car of mass 100 pounds moving at 80 mph.

2. A car of mass 200 pounds moving at 60 mph.

3. A car of mass 50 pounds moving at 90 mph.

4. A car of mass 150 pounds moving at 50 mph.

If x is the average (arithmetic mean) of m and 9, y is the average of 2m and 15, and z is the average of 3m and 18, what is the average of x, y, and z in terms of m?

A) m+6

B) m +7

C) 2m+14

D) 3m+21

Which of the following is not a unit of mass?

(A) Pound

(B) Dine

(C) Village

(D) kg

Light year is a unit of which of the following physical sign?

(A) Short time interval

(B) mass

(C) Work

(D) distance

PLEASE DO ASAP

Lesson 22

Can someone help me answer these questions please

Determine the range of the following graph:

A car travels along a straight road at a constant speed of 20 meters per second. The car's brakes can decelerate it at a rate of 5 meters per second squared. If the car's driver sees an obstacle and applies the brakes, how far will the car travel before coming to a complete stop?

If 15 is added to a number then it is increased by 20%. Find the Original number?

a. 55

b.65

c.75

d.90

e. None of the above

General Aptitude question from gate.

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If the annual increase in the population be 20% and the present population be 10,000. What will be the population after 3 years hence?

a.16000

b.17280

c.14400

d.17820

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