A physical change does not produce new substances. A physical change may only change the physical properties of a substance. a change in size, shape, or phase of matter.

8 0

2 years ago

A current carrying wire is surrounded by a magnetic field. True or false

Aleks04 [339]

The answer is true because A current carrying wire is surrounded by magnetic field

7 0

3 years ago

An electric heater is operated by applying a potential difference of 78.0 V across a nichrome wire of total resistance 7.00 Ω. a

aleksley [76]

PART A)

Here we know that

potential difference across the wire is

$V = 78 volts$

resistance of wire is

$R = 7 ohm$

now by ohm's law

$V = iR$

$78 = i(7 ohm)$

$i = 11.14 A$

Part b)

Power rating is defined as rate of electrical energy

it is defined as

$P = iV$

now we have

$P = 11.14 ( 78)$

$P = 869.1 Watt$

8 0

2 years ago

What two kinds of motion combine to produce projectile motion?

Vikki [24]

Horizontal and Vertical are the two motions that combine to produce projectile motion.

4 0

3 years ago