PHYSICS HIGH SCHOOL

This is heat or electrical transfer by contact.

Answers

Answer 1

Answer:

Answer:

The correct answer for this problem is conduction.

Explanation:

I just did the test and conduction was the correct answe.

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As the particles in a soup reach the boiling point what do you expect to happen
PLEASE HELP!!!!!!!!!! Because the boy is slowing down, his velocity decreases over time. Use the final and starting velocities in the data table to calculate his average acceleration. Use the equation , where t is time, ux is initial velocity, vx is final velocity, and ax is acceleration. Use time t = 1.6 seconds, which is calculated using values from the table (1.8 − 0.2).
If the frequencies of two component waves are 24 Hz and 20 Hz, they should produce _______ beats per second. A. 2 B. 8 C. 4 D. 12

Direct current is the flow of an electric charge?

Answers

Direct current is the unidirectional flow of an electric charge.

The term 'unidirectional' in the statement means that direct current only moves in one direction. Direct current usually produced by things such as batteries, dynamos, and power supplies

hope this helps

Two objects are connected by a light string that passes over a frictionless pulley as shown in the figure below. Assume the incline is frictionless and take m1 = 2.00 kg, m2 = 7.35 kg, and θ = 50.0°.1) Find the magnitude of the accelerations of the objects. (m/s^2)
2)Find the tension in the string. (N)
3)Find the speed of each object 2.50 s after being released from rest. (m/s)

Answers

Answer:

Part a)

$a = 3.81 m/s^2$

Part b)

$T = 27.2 N$

Part c)

$v_f = 9.53 m/s$

Explanation:

For m2 mass along the inclined plane we can write

$m_2g sin\theta - T = m_2 a$

for m1 mass we can write equation in vertical direction

$T - m_1 g = m_1 a$

so we will have

$m_2g sin\theta - m_1g = (m_1 + m_2) a$

so we have

$a = ((m_2 sin\theta - m_1)g)/(m_1 + m_2)$

now plug in all data in it

$a = ((7.35 sin50 - 2)9.81)/(7.35 + 2)$

$a = 3.81 m/s^2$

Part b)

from above equation

$T = m_1g + m_1 a$

$T = 2(9.81 + 3.81)$

$T = 27.2 N$

Part c)

Speed of the object after t = 2.50 s

$v_f = v_i + at$

$v_f = 0 + 3.81(2.50)$

$v_f = 9.53 m/s$

assume m1 moving down, so m2 is moving up and accelleration direction of each box is the same as its movement.

check forces act on m1
1. tension of the rope T up
2. m1g down
3. moving down with a
f = ma --> m1g - T = m1a ...(1)
or. T = m1g - m1a ... (1.1)

check forces act on m2
1. tension of the rope T up alone the incline. it must be equal to previous one because it is the same segment of the rope.
2. m2gsine(θ) down along the incline
3. moving up with a
f = ma --> T - m2gsine(θ) = m2a ...(2)

replace T from (1.1) to (2)
(m1g - m1a) - m2gsin(θ) = m2a
m1g - m2gsin(θ) = m2a + m1a
a = g(m1 - m2sin(θ))/(m1 + m2)

plug in value you will get the answer. if a is negative, it means direction on our assumption is not correct. it's the opposite (direction).

after get a, you will get T
and velocity use v = u + at

... i cannot post pict. draw the diagram will make you understand this better.

Which of the following is a region where magnetic force will affect other magnets?A-electronic domain
B- magnetic generator
C- magnetic field
D- magnetic charge

Answers

it is c.......ik bc i just got it right on platoweb

In a given circuit, the supplied voltage is 1.5 volts. One resistor is 3 ohms and the other is 2 ohms. Use Ohm's law to determine the current in the circuit. 0.3 amps 1.5 amps 7.5 amps 3.3 amps The purpose of a fuse or circuit breaker is _____. to speed up the current to slow down the current to stop current that is flowing too fast to stop current that is flowing too slow

Answers

Part #1:
You haven't mentioned whether the resistors are in series
or in parallel. It's going to make a difference.

-- If the resistors are in series, then their net effective resistance
is their sum.

   (3 ohms) + (2 ohms) = 5 ohms.

Current in the circuit is

(supply voltage) / (total resistance)

   =    (1.5 volts) / (5 ohms) = 0.3 ampere .

-- If the resistors are in parallel, then their net effective resistance
   is
   (their product) / (their sum)

      = (1 ohms x 2 ohms) / (1 ohm + 2 ohms)

    =    (2 ohms²) / (3 ohms) = 2/3 ohm .

Current in the circuit is

(supply voltage) / (total resistance)

   = (1.5 volts) / (2/3 ohm) = 1.0 ampere .

I guess your resistors are in series, because 0.3 amp
is one of the choices but 1.0 amp isn't.
______________________________________

Part #2.
When it comes to talking about electric current, the terms
"speed up", "slow down", "fast", and "slow" are somewhere
between meaningless and absurd.

The purpose of a fuse or circuit breaker is to shut down a current
that is too great ... too great a magnitude, too many electrons all
trying to crowd their way through the wire at the same time, like
100 lines of ants all carrying bread crumbs through a straw and
back to their hole, when there was only supposed to be one or
two lines.

Speed has nothing to do with it. All electric currents flow through
wires at the same speed, at least in high school. It's a matter of
Amperes, which has nothing to do with speed.

What do all hydrogen atoms and ions have in common?

Answers

They have the same Number of protons

Describe Earth's three global wind belts

Answers

Polar Easterlies: From 60-90 degrees latitude.
Prevailing Westerlies: From 30-60 degrees latitude (aka Westerlies).
Tropical Easterlies: From 0-30 degrees latitude (aka Trade Winds).

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There is little vertical air movement in the __ because of the cold, heavy air at the bottom of the layer.

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What is true for solar, wind, and geothermal energy?

When demonstrating the interference of light waves, the dark fringes that appear represent where the waves interfere _________________. A. Constructively B. Not at all C. Destructively D. A little bit