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3 years ago

10

two objects are in uniform circular motion at the same speed but at different radii. the ones with the __ radius has the largest

centripetal acceleration.

2 answers:

ira [324]3 years ago

8 0

The one with the smaller radius has the greater centripetal FORCE.

We can't say anything about the centripetal acceleration, because that also depends on their masses, which you haven't told us.

Cerrena [4.2K]3 years ago

5 0

Answer:the one with the smaller radius has the highest centripetal force

Explanation:

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A spacecraft is fueled using hydrazine (N2H4; molecular weight of 32 grams per mole [g/mol]) and carries 1640 kilograms [kg] of

Sauron [17]

Answer:

The value is $t = 689.029 \ hours$

Explanation:

From the question we are told that

The molar mass of hydrazine is $Z = 32 g/mol = \frac{32}{1000} = 0.032 \ kg/mol$

The initial temperature is $T_i = -186 ^o F = (-186-32) *\frac{5}{9} +273.15 = 152\ K$

The final temperature is $T_f = 78 ^o F = (78-32) *\frac{5}{9} +273.15 = 298.7 \ K$

The specific heat capacity is $c_h = 0.099 [kJ/(mol K)] = 0.099 *10^3 J/(mol/K)$

The power available is $P = 300 \ W$

The mass of the fuel is $m = 1640 \ kg$

Generally the number of moles of hydrazine present is

$n = \frac{m}{Z}$

=> $n = \frac{1640}{= 0.032}$

=> $n = 51250 \ mol$

Generally the quantity of heat energy needed is mathematically represented as

$Q = n * c_h * (T_f -T_i)$

=> $Q = 51250 * 0.099 *10^3 * (298.7 - 152)$

=> $Q = 7.441516913 * 10^{8} \ J$

Generally the time taken is mathematically represented as

$t = \frac{Q}{P}$

=> $t = \frac{7.441516913 * 10^{8} }{300}$

=> t = 2480505.6377 s

Converting to hours

$t = \frac{2480505.6377}{3600}$

=> $t = 689.029 \ hours$

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3 years ago

What is the relationship between chromosomes and a body's appearance? (A) Chromosomes make it possible for all bodies to exactly

Katen [24]

Answer: The correct option is B.

Chromosomes contain genes that tell the body how to grow and work.

Explanation:

This is because chromosomes contain alot of human genes which are found in the nucleus and every humans have 23 pairs of chromosomes. The sets of genes determines some of the body features, characteristics or traits. The genes in the body form the genotype and the genotype is expressed physically which is now the phenotype i.e traits expressed physically in the body which is an indication of body appearance.

7 0

3 years ago

A wire connected to a 9 V battery records a current of 3.6 A in an ammeter. What is the resistance of the wire?

Vikki [24]

Answer:

R=2.5 ohm

Explanation:

Given that :

Voltage difference = 9 V

Current ,I= 3.6 A

As we know that from Ohm's law

V= I R

V =Voltage difference

I=Current

R=Resistance of the wire

Now by putting the values in the above equation we get

9 = 3.6 R

$R=\dfrac{9}{3.6}$

R=2.5 ohm

Therefore the resistance of the wire will be 2.5 ohm.

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3 years ago

What is an example of this picture

Natali [406]

I don’t know but maybe is Thermal Energy

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3 years ago

Many physical properties, such as force and mass, cannot be measured directly. Rather, some other physical property is measured

Salsk061 [2.6K]

Answer:

u =0.269

Explanation:

To find the coefficient of friction we know the following formula

$F_{f} = uN$

Where

$F_{f}$ = Force of Friction

$u$ = Coefficient of Friction

$N$ = Normal Force

Thus we first find the Normal force (N). Remember that the Normal force is perpendicular to the surface, and is equal to the opposing component of Weight (W). Since the surface here is horizontal, then the Normal force will be equal to the Weight.

$N = mg\\ N = (2.12)(9.8)\\ N = 20.776 N$

Now we find the Force on the spring that caused the extension of 3.25cm or 0.0325m

$F_{f} = ke$

Where

$F_{f}$ = Force of Friction

$k$ = Force Constant

= extension

Hence

$F_{f} = ke\\ F_{f} = (172)(0.0325)\\ F_{f} =5.59N$

Now to find the coefficient of friction we use the first formula

$F_{f} = uN\\ 5.59 = u(20.776)\\ u =0.269$

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3 years ago