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3 years ago

3. A simple way to state Newton’s first law is:

Physics

1 answer:

MrRissso [65]3 years ago

4 0

Explanation:

A simple way to state Newton's first law is:

For every action force, there is a reaction force which is equal in magnitude and opposite in direction.

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A 1 kg object sits on the earth’s surface. What is the force of gravity between the object and the earth? (mass of the earth = 5

snow_lady [41]

Answer:

9.81N

Explanation:

the force of attraction is given by

F=GmM/R²

where m is mass of the body

M is mass of the earth

R is radius of the earth

G is the universal gravitational constant(6.67x10-¹¹)

hence we substitute the values in the formula.

you can ask questions

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3 years ago

Define measurements.

Reptile [31]

Answer:

act or process of measuring

Explanation:

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3 years ago

Classify pH values of 9.1, 1.2, and 5.7 as basic, acidic, or very acidic.

kramer

9.1 basic since > 7
1.2 VERY acidic << 7
5.7 acidic < 7

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3 years ago

If the pressure acting on a given sample of an ideal gas at constant temperature is tripled, what happens to the volume of the g

oee [108]

Answer:

Explanation:

According to Boyle's law for constant temperature of gas Pressure is inversely proportional to the volume of gas.

$PV=nRT$

$PV=constant$

$P\propto \frac{1}{V}$

if Pressure is tripled then

$P\times V_1=3P\times V_2$

$V_2=\frac{V_1}{3}$

Volume becomes one-third of original volume

7 0

3 years ago

A 140 kg load is attached to a crane, which moves the load vertically. Calculate the tension in the

Nesterboy [21]

Answer:

A.) 1372 N

B.) 1316 N

C.) 1428 N

Explanation:

Given that a 140 kg load is attached to a crane, which moves the load vertically. Calculate the tension in the cable for the following cases:

a. The load moves downward at a constant velocity

At constant velocity, acceleration = 0

T - mg = ma

T - mg = 0

T = mg

T = 140 × 9.8

T = 1372N

b. The load accelerates downward at a rate 0.4 m/s??

Mg - T = ma

140 × 9.8 - T = 140 × 0.4

1372 - T = 56

-T = 56 - 1372

- T = - 1316

T = 1316N

C. The load accelerates upward at a rate 0.4 m/s??

T - mg = ma

T - 140 × 9.8 = 140 × 0.4

T - 1372 = 56

T = 56 + 1372

T = 1428N

8 0

3 years ago