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Soloha48 [4]
4 years ago
5

Welding, cutting, or heating in any enclosed spaces involving which of the following metals should be performed with local exhau

st ventilation or employees should be provided air line respirators:
Physics
1 answer:
sweet [91]4 years ago
4 0

steal aluminum iron

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our lab partner wears a new pair of sneakers to lab and, rather than performing the required experiments, you decide to measure
Dafna1 [17]

Answer:

The coefficient of static friction between your partner and the floor is 0.55

Explanation:

Given:

Mass m = 59 Kg

Frictional force F_{s}  = 318.3 N

From the formula of frictional force,

 F_{s} = \mu_{s} mg

Where \mu _{s} = coefficient of static friction, g = 9.8 \frac{m}{s^{2} }

Put the above values and find the coefficient of static friction.

318.3 = \mu_{s} \times 59 \times 9.8

\mu_{s} = 0.55

Therefore, the coefficient of static friction between your partner and the floor is 0.55

4 0
3 years ago
A 9.0-V battery is connected to a resistor so that there is a 0.50-A current through the resistor.For how long should the batter
salantis [7]

Answer:

35.6 s

Explanation:

The power through the resistor is given by:

P=VI

where V=9.0 V is the voltage and I=0.50 A is the current. Substituting into the formula, we find

P=(9.0 V)(0.5 A)=4.5 W

The power is also equal to:

P=\frac{W}{t}

where W is the work done while t is the time taken. Since we know the work done, W=160 J, we can re-arrange the equation to find the time taken:

t=\frac{W}{P}=\frac{160 J}{4.5 W}=35.6 s

7 0
4 years ago
A 3 kg bowling ball is thrown onto a mattress. If it takes 0.3 seconds to stop the ball using a force of 24 N, what was the init
enyata [817]

Answer:

-24 m/s

Explanation:

mass of the bowling ball =  3 kg

time (t) = 0.3 seconds

Force = 24 N

initial velocity u = ???

We know that;

Force = mass × acceleration (a)

So;

24 = 3 × a

a = 24/3

a = 8 m/s²

Also;

From equation of motion; acceleration is given by the relation;

a =\frac{v-u}{t}

if v = 0

then ;

8 = \frac{0-u}{0.3}

24 = 0- u

u = -24 m/s

Thus; the  initial velocity of the bowling ball when it first touched the mattress =  -24 m/s

7 0
4 years ago
Which of the following is not a metric base unit? *<br> Meter<br> Liter<br> Inch<br> Gram
polet [3.4K]

Answer:

Liter

Explanation:

8 0
3 years ago
Read 2 more answers
Adam and kevin are roommates. Adam can clean their apartment in 45 minutes. Kevin can clean it in 60 minutes. Rounded to the nea
Karo-lina-s [1.5K]
If you add both numbers together it makes 105 but we’re talking time so it’ll be an hour and 45 minutes for them to clean their apartment.
5 0
3 years ago
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