PHYSICS HIGH SCHOOL

What is a caliper used for?to make a precise measurement of volume
to make a temperature measurement with low precision
to make a volume measurement with low precision
to make a precise measurement of length

Answers

Answer 1

Answer:

Answer;

To make a precise measurement of length

Explanation;

Calipers are used to make a precise measurement of length such as diameters of circular solids, such as the diameter of a pipe.

All calipers may be used to take the same measurements, that is the inside, outside, depth and the step measurements.Those calipers such as vernier caliper that can be used to measure the external size of an object have a pair of jaws.
Vernier caliper is a type of caliper that is used to precisely measure outside dimensions such as length, width, or diameter.

Answer 2

Answer:

a caliper is used to make a precise measurement of length within tubing or on nuts/bolts, or anything really

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True or false: Nicolaus Copernicus devised the first comprehensive Sun-centered model.

Answers

Answer:

True

Explanation:

Copernican heliocentrism is the astronomical model developed by Nicolaus Copernicus and published in 1543.

A long solenoid has 1400 turns per meter of length, and it carries a current of 4.9 A. A small circular coil of wire is placed inside the solenoid with the normal to the coil oriented at an angle of 90.0˚ with respect to the axis of the solenoid. The coil consists of 42 turns, has an area of 1.2 × 10-3 m2, and carries a current of 0.45 A. Find the torque exerted on the coil.

Answers

Answer:

The torque on the coil is $1.955* 10^(- 4)\ N-m$

Solution:

No. of turns per meter length, n = 1400 turns\m

Current, I = 4.9 A

Angle, $\theta = 90.0^(\circ)$

No. of turns of coil, N = 42 turns

Area, A = $1.2* 10^(- 3)m^(2)$

Current in the coil, I' = 0.45 A

Now,

To calculate the exerted torque on the coil:

The magnetic field, B produced inside the coil is given by:

$B = n\mu_(o)I$

$B = 1400* 4\pi times 10^(- 7)* 4.9 = 8.62* 10^(- 3)\ T$

Now, the torque exerted is given by:

$\tau = I'NAB$

$\tau = 0.45* 42* 1.2* 10^(- 3)* 8.62* 10^(- 3) = 1.955* 10^(- 4)\ N-m$

Answer:

$T\approx 1.95* 10^(-4) N.m$

Explanation:

Given:

A long solenoid having

no. of turns per meter, n =1400

current, I = 4.9 A

A small coil of wire placed inside the solenoid

angle of orientation with respect to the axis of the solenoid, $\theta=90\degree$ °

no. of turns in the coil, N = 42

area of the coil, $a= 1.2* 10^(-3) m^2$

current in the coil, $i =0.45 A$

We have for torque:

$T=n.i.a.B. sin\theta$ .......................(1)

∵ $B=\mu_(0) .n.I$ ................................(2)

where:

B= magnetic field

$\mu_0=$ The permeability of free space = $4\pi*10^(-7) T.m.A^(-1)$

Substitute B from eq. (2) into eq. (1) we have:

$T=n.i.a.(\mu_0.N.I ).sin\theta$

putting the respective values in above eq.

$T=42* 0.45* 1.2* 10^(-3)* 4\pi*10^(-7) * 1400* 4.9* sin 90^(\circ)$

$T\approx 1.95* 10^(-4) N.m$

Identify some common fuels

Answers

On a worldwide scale, the most common fuels are wood, grass, peat, coal, and animal fats and oils.

Coal, Wood, Petroleum, Natural Gas, Kerosene, Diesel, LPG (Liquefied Petroleum Gas), CNG (Compressed Natural Gas), Coke etc. are some commonly used fuels.

A toaster with a power rating of 1,000 watts is plugged into a household voltage of 120 volts. How much current runs through the toaster? A) 120,000 amps
B) 880 amps
C) 8.3 amps
D) 0.120 amps

Answers

Answer : I = 8.33 A

Explanation :

It is given that,

Power rating of the toaster, P = 1000 watts

Household voltage, V = 120 volts

We know the relation between power, voltage and the current is :

$P=V* I$

$I=(P)/(V)$

$I=(1000\ W)/(120\ V)$

$I = 8.33\ A$

8.33 A of current runs through the toaster.

Hence, this is the required solution.

C) 8.3 i believe i wouldnt take me 100%

20 miles per hour north is an example of ______A) acceleration
B) velocity
C) deceleration
D) speed

Answers

B. It's an example of velocity due to the fact that it has a measurement of speed, divided by time, and has a specific direction. Acceleration doesn't have any direction on it, but has speed divided by time. C and D have a different mode of measurement despite of the fact that it still needs meters/miles/km.

Caleb likes to take his fork and bang it on different surfaces to make different sounds. Based on Piaget's substages, we can assume that Caleb is: a) In the sensorimotor stage b) In the preoperational stage c) In the concrete operational stage d) In the formal operational stage