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3 years ago

What does m/s/s mean?

Physics

1 answer:

Pani-rosa [81]3 years ago

5 0

Explanation:

There are two answers

m/(s/s)=m

(m/s)/s=m/s²

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Please help on questions D AND E and please show working out as well so I can understand better thank you only QUESTIONS D AND E

tester [92]

Answer:

d. 87,500 J

e. 49,600 J

Explanation:

The total energy is the heat absorbed by the copper plus the heat absorbed by the water.

E = m₁C₁ΔT + m₂C₂ΔT

E = (1 kg) (390 J/kg/°C) (10 °C) + (2 kg) (4180 J/kg/°C) (10 °C)

E = 87,500 J

E = m₁C₁ΔT + m₂C₂ΔT

E = (2 kg) (390 J/kg/°C) (10 °C) + (1 kg) (4180 J/kg/°C) (10 °C)

E = 49,600 J

5 0

3 years ago

Which object(s) formed last in our solar system?

alexira [117]

Answer:

first option bro

Explanation:

by the way if you play free fire give me your uid on the comment section

5 0

4 years ago

Consider a helium balloon with volume 2.1 L.

Anna11 [10]

Answer:

The net force is 26.52 N

Explanation:

Given that,

Volume of balloon = 2.1 L

Density of air = 1.29 kg/m³

Mass = 1.3 g

Density of helium $\rho'= 0.18\times10^{-3}\ g/cm^3$

(a). We need to calculate the buoyant force on the balloon

Using formula of buoyant force

$F_{b}=\rho V g$

Put the value into the formula

$F_{b}=1.29\times\times2.1\times9.8$

$F_{b}=26.54\ N$

(b). We need to calculate the net force

Using formula of net force

$F_{net}=F_{b}-(V\times\rho'+m)\times g$

$F_{net}=26.54-(2.1\times10^{-3}\times0.18\times10^{-3}+0.0013)\times9.8$

$F_{net}=26.52\ N$

Hence, The net force is 26.52 N.

6 0

3 years ago

B.A certain piece of copper wire is determined to have a mass of 2.00 g per meter.

masha68 [24]

Answer:

14cm

Explanation:

Mass per gram of the piece of wire;

2g of the wire is found in 1m

Since

100cm = 1m;

So;

100cm of the wire contains 2g of the wire

To provide 0.28g

Since;

2g of wire is made up of 100cm

0.28g of wire will be contained in $\frac{100 x 0.28}{2}$ = 14cm

14cm of the wire will contain 0.28g

8 0

3 years ago

A portable DVD player requires six 1.5-volt batteries to operate. If the resistance in the circuit is 7.2 ohms, what is the curr

Dafna1 [17]

Answer: The current required will be of 1.25 Ampere.

Explanation:

Voltage of one battery= 1.5 Volts

Voltage required by DVD player to operate, V = 6 × 1.5 = 9 Volts

Resistance offered by the device, R = 7.2 Ohms

V = IR (Ohm's law)

$I=\frac{V}{R}=\frac{9}{7.2}=1.25 ampere$

The current required will be of 1.25 Ampere.

3 0

3 years ago

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