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3 years ago

5

According to Newton's first law, an object at rest will _____.

1 answer:

Vesnalui [34]3 years ago

8 0

Stay at rest unless moved my force! :)

You might be interested in

If the magnet is now pushed into the coil and then held stationary inside the coil describe fully what would you observe on the

alexira [117]

Answer:

E = q V B describes the electric field induced

E Proportional to V B

while the magnet is pushed into the coil the induced field (B) will increase (consider 1 turn of the coil)

If V is constant the E-field will increase due to increasing B and the galvanometer will deflect accordingly

When V drops to zero the deflection must again be zero

So one would see a blip due to the deflection of the galvanometer

Note that as V increases the galvanometer will deflect one way and then as V drops to zero the deflection will be opposite (drop to zero when V is zero)

B always increases to a constant value because of the properties of the magnet.

8 0

3 years ago

2. In any energy transformation, energy is _____. A created B conserved C destroyed

algol13

Answer:

B energy can't be created or destroyed

6 0

3 years ago

A horizontal spring with spring constant 85 N/mN/m extends outward from a wall just above floor level. A 4.5 kgkg box sliding ac

swat32

Answer:

v = 0.028 m/s

Explanation:

In this case you take into account that all the elastic potential of the box, when the spring is compressed is equal to the kinetic energy of the box before it hits the spring. That is:

$K=U$

$\frac{1}{2}mv^2=\frac{1}{2}kx^2$ (1)

m: mass of the box = 4.5kg

k: spring constant = 85N/m

x: compression of the spring = 6.5cm = 0.0065m

You solve the equation (1) for v:

$v=x\sqrt{\frac{k}{m}}$ (2)

Next, you replace the values of the parameters:

$v=(0.0065m)\sqrt{\frac{85N/m}{4.5kg}}=0.028\frac{m}{s}$

The velocity of the box when it hits the spring is 0.028m/s

5 0

4 years ago

Which is the correctly balanced equation for the reaction of rust, Fe2O3, and hydrochloric acid, HCl?

Mariana [72]

Answer: Option (c) is correct answer.

Explanation:

The given reaction equation is as follows.

$Fe_{2}O_{3} + HCl \rightarrow FeCl_{3} + H_{2}O$

The number of atoms on reactant side are as follows.

Fe = 2
O = 3
H = 1
Cl = 1

The number of atoms on product side are as follows.

Fe = 1
O = 1
H = 2
Cl = 3

Therefore, in order to balance the equation we will balance the number of atoms in both reactant and product side.

Since number of Fe atoms in reactant side is 2, therefore, multiply $FeCl_{3}$ by 2 in the product side.

Number of O atoms in reactant side is 3, therefore, multiply $H_{2}O$ by 3 in the product side.

Now, the number of H atoms on product side is 6, therefore, multiply HCl by 6 in the reactant side.

The number of chlorine atoms on both reactant and product side equals 6.

Thus, the equation will become as follows.

$Fe_{2}O_{3} + 6HCl \rightarrow 2FeCl_{3} + 3H_{2}O$

Hence, the equation is balanced.

5 0

4 years ago

Read 2 more answers

Zeb was moving his dresser. He pushed with 1000N and the resulting acceleration was 200m/s2. What was its mass?

PilotLPTM [1.2K]

Answer:

5

Explanation:

Formula for Mass (for this question)

$mass=\frac{Force}{Acceleration}$

mass= 1000N/200 $m^{2}$ =5

(pls do correct me if I have any mistakes it would rlly help others!)

7 0

2 years ago