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Maru [420]
4 years ago
11

A 100 g aluminum calorimeter contains 250 g of water. The two substances are in thermal equilibrium at 10°C. Two metallic blocks

are placed in the water. One is a 50 g piece of copper at 66°C. The other sample has a mass of 71 g and is originally at a temperature of 100°C. The entire system stabilizes at a final temperature of 20°C. Determine the specific heat of the unknown second sample.
Physics
1 answer:
Gnesinka [82]4 years ago
4 0
It would be nice if someone can help me
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Express the mathematical formula to calculate the number of images formed when two mirrors are inclined at θ angle.
LiRa [457]

Answer:

The number of images formed by two adjacent plane mirrors depends on the angle between the mirror. If (in degrees) is angle between the plane mirrors then number of images are given by, n = 360 θ − 1.

5 0
3 years ago
A gyroscope flywheel of radius 1.96 cm is accelerated from rest at 13.0 rad/s2 until its angular speed is 2270 rev/min. (a) What
nika2105 [10]

Tangential acceleration of a point on the rim of the flywheel during this spin-up process is 0.2548 m/s².

Tangential acceleration is defined as the rate of change of tangential velocity of the matter in the circular path.

Given,

Radius of flywheel (r) = 1.96 cm = 0.0196m

Angular acceleration (α)= 13.0 rad/s²

The tangential acceleration formula is at=rα

where, α is the angular acceleration, and r is the radius of the circle.

using the formula; at=rα  = (13.0 rad/s²) (0.0196m) = 0.2548 m/s².

The tangential acceleration is 0.2548 m/s².

Learn more about the Tangential acceleration with the help of the following link:

brainly.com/question/15743294

#SPJ4

5 0
1 year ago
A man has power of 90W and mass 60kg runs up a staircase in 40 second. If each step of staircase is 20m high calculate the numbe
Zielflug [23.3K]
Power is calculated by dividing the work done with the time interval of the motion. Work, on the other hand, is force times the distance traveled. Therefore, we can calculate as follows:<span>

Power=W/t = mgd/t
90 = 60(9.81)d / 40
d = 6.12 m

Number of steps = 20/6.12 = 3.27 or 3 steps</span>
5 0
3 years ago
If you want to calculate the acceleration of a car, you should _____ the change in velocity of the car by the time interval.
Neporo4naja [7]

Answer:

Your awnser is B. Increase

Explanation:

5 0
3 years ago
Read 2 more answers
Solve this question with steps
Novay_Z [31]
The problem was too big to type in my phone.

I hope my answer is readable.

P.S After the collision P is also moving in the same direction as Q.

5 0
4 years ago
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