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ivanzaharov [21]
2 years ago
15

A box is being pushed but two stellar science students, one on each side of the box. Peter is pushing box with a force of 10 N t

o the left. Josh is pushing the box with a force of 15 N to the right. Who is the stronger individual and what is the net force and direction on the box?
Physics
1 answer:
Vitek1552 [10]2 years ago
5 0

Answer:

Josh is the strongest

The net force is 5N towards right

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1.3 kg of water, at an initial temperature of 25oC, is heated at a rate of 100 W in a well-insulated container. How much time (i
Leviafan [203]

Answer:

68.25 minutes.

Explanation:

Power = Energy/time or

Power = Heat/time

P = Q/t....................... Equation 1

Q = Pt ........................ Equation 2

Where Q = quantity of heat, P = power, t = time.

Also,

Q = cm(t₂-t₁) ................. Equation 3

Where c = specific heat capacity of water, m = mass of water, t₁ = initial temperature of water, t₂ = final temperature of water.

substitute equation 2 into equation 3

Pt = cm(t₂-t₁) ............... Equation 4

make t the subject of the equation

t = cm(t₂-t₁)/P................ Equation 5

Given: P = 100 W, m = 1.3 kg, t₁ = 25 °C, t₂ = 100 °C.

Constant: 4200 J/kg.K

Substitute into equation 5

t = 1.3(4200)(100-25)/100

t = 409500/100

t = 4095 seconds

t = (4095/60) minutes = 68.25 minutes.

Hence the time it will take the water to reach boiling point = 68.25 minutes

6 0
3 years ago
What will be the restoring force if a spring with a spring constant of 45 newtons per meter is pulled 0.03 meters in the downwar
allsm [11]
To calculate for the force in a spring, we use Hooke's Law which relates force and the displacement of the spring. It is said that the force is directly proportional to the displacement. So, it will have the equation F = kx where k is a constant and it is the spring constant.

F = kx
F = 45 N/m (0.03)
F = 1.35 N
8 0
2 years ago
If an electron is released at the equator and falls toward earth under the influence of gravity, the magnetic force on the elect
Alborosie
Using Fleming’s left hand rule,

The magnetic force on the electron will be west. Example: If it is dropped above the equator in Africa, the electron will head towards North America.
4 0
2 years ago
If an object has a mass of 8 kg, what is its approximate weight on Earth?
Fittoniya [83]

Answer:

10^24 kg

Explanation:

3 0
3 years ago
Au cours d'un orage le bruit de tonnerre met 7 secondes pour parvenir aux oreilles d'un observateur _1_ à quelle distance est to
kari74 [83]

Answer:

2380\ \text{m}

7.93\times 10^{-6}\ \text{s}

Explanation:

t = Temps mis par la foudre pour parcourir la distance = 7 secondes

v = Vitesse du son dans l'air = 340 m / s

La distance est donnée par

s=vt\\\Rightarrow s=340\times 7\\\Rightarrow s=2380\ \text{m}

L'éclair est tombé à une distance de 2380\ \text{m}

c = Speed of light = 3\times 10^8\ \text{m/s}

Le temps est donné par

t=\dfrac{s}{c}\\\Rightarrow t=\dfrac{2380}{3\times 10^8}\\\Rightarrow t=7.93\times 10^{-6}\ \text{s}

Le temps mis par la lumière pour parcourir la distance est de 7.93\times 10^{-6}\ \text{s}.

8 0
3 years ago
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